Merge branch 'master' of https://github.com/grpc/grpc into gpr_malloc_is_all

681 files changed, 5767 insertions, 3993 deletions

diff --git a/src/boringssl/gen_build_yaml.py b/src/boringssl/gen_build_yaml.py
index 3a7116b181..20f6413adf 100755
--- a/src/boringssl/gen_build_yaml.py
+++ b/src/boringssl/gen_build_yaml.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python2.7
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index 206a6e1fe5..08b1123a51 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/cpp_generator.h b/src/compiler/cpp_generator.h
index 4f9de9d11a..03621c8794 100644
--- a/src/compiler/cpp_generator.h
+++ b/src/compiler/cpp_generator.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/cpp_plugin.cc b/src/compiler/cpp_plugin.cc
index d8ada4835c..92a9ba7549 100644
--- a/src/compiler/cpp_plugin.cc
+++ b/src/compiler/cpp_plugin.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/csharp_generator.cc b/src/compiler/csharp_generator.cc
index f6079bdc05..5a8746df8d 100644
--- a/src/compiler/csharp_generator.cc
+++ b/src/compiler/csharp_generator.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc
index 5a2ecce1d4..02c032800b 100644
--- a/src/compiler/python_generator.cc
+++ b/src/compiler/python_generator.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/python_generator.h b/src/compiler/python_generator.h
index 68da18f9ba..e56b6790ef 100644
--- a/src/compiler/python_generator.h
+++ b/src/compiler/python_generator.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/compiler/python_plugin.cc b/src/compiler/python_plugin.cc
index d781ddbee5..92a07b2f80 100644
--- a/src/compiler/python_plugin.cc
+++ b/src/compiler/python_plugin.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/census/README.md b/src/core/ext/census/README.md
index fb615a2194..fb615a2194 100644
--- a/src/core/lib/census/README.md
+++ b/src/core/ext/census/README.md
diff --git a/src/core/lib/census/aggregation.h b/src/core/ext/census/aggregation.h
index f353368b97..45f789c772 100644
--- a/src/core/lib/census/aggregation.h
+++ b/src/core/ext/census/aggregation.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,8 +33,8 @@
 
 #include <stddef.h>
 
-#ifndef GRPC_CORE_LIB_CENSUS_AGGREGATION_H
-#define GRPC_CORE_LIB_CENSUS_AGGREGATION_H
+#ifndef GRPC_CORE_EXT_CENSUS_AGGREGATION_H
+#define GRPC_CORE_EXT_CENSUS_AGGREGATION_H
 
 /** Structure used to describe an aggregation type. */
 struct census_aggregation_ops {
@@ -63,4 +63,4 @@ struct census_aggregation_ops {
   size_t (*print)(const void *aggregation, char *buffer, size_t n);
 };
 
-#endif /* GRPC_CORE_LIB_CENSUS_AGGREGATION_H */
+#endif /* GRPC_CORE_EXT_CENSUS_AGGREGATION_H */
diff --git a/src/core/lib/statistics/census_init.c b/src/core/ext/census/census_init.c
index bbecd62764..690b09e789 100644
--- a/src/core/lib/statistics/census_init.c
+++ b/src/core/ext/census/census_init.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#include "src/core/lib/statistics/census_interface.h"
+#include "src/core/ext/census/census_interface.h"
 
 #include <grpc/support/log.h>
-#include "src/core/lib/statistics/census_rpc_stats.h"
-#include "src/core/lib/statistics/census_tracing.h"
+#include "src/core/ext/census/census_rpc_stats.h"
+#include "src/core/ext/census/census_tracing.h"
 
 void census_init(void) {
   census_tracing_init();
diff --git a/src/core/lib/statistics/census_interface.h b/src/core/ext/census/census_interface.h
index b3b3439072..57e75f56ee 100644
--- a/src/core/lib/statistics/census_interface.h
+++ b/src/core/ext/census/census_interface.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_STATISTICS_CENSUS_INTERFACE_H
-#define GRPC_CORE_LIB_STATISTICS_CENSUS_INTERFACE_H
+#ifndef GRPC_CORE_EXT_CENSUS_CENSUS_INTERFACE_H
+#define GRPC_CORE_EXT_CENSUS_CENSUS_INTERFACE_H
 
 #include <grpc/support/port_platform.h>
 
@@ -73,4 +73,4 @@ census_op_id census_tracing_start_op(void);
 /* Ends tracing. Calling this function will invalidate the input op_id. */
 void census_tracing_end_op(census_op_id op_id);
 
-#endif /* GRPC_CORE_LIB_STATISTICS_CENSUS_INTERFACE_H */
+#endif /* GRPC_CORE_EXT_CENSUS_CENSUS_INTERFACE_H */
diff --git a/src/core/lib/statistics/census_log.c b/src/core/ext/census/census_log.c
index 1fb942a78a..9a7331adc2 100644
--- a/src/core/lib/statistics/census_log.c
+++ b/src/core/ext/census/census_log.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -89,7 +89,7 @@
    include the name of the structure, which will be passed as the first
    argument. E.g. cl_block_initialize() will initialize a cl_block.
 */
-#include "src/core/lib/statistics/census_log.h"
+#include "src/core/ext/census/census_log.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
 #include <grpc/support/cpu.h>
diff --git a/src/core/lib/statistics/census_log.h b/src/core/ext/census/census_log.h
index c3fbd555ba..534ecc5705 100644
--- a/src/core/lib/statistics/census_log.h
+++ b/src/core/ext/census/census_log.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_STATISTICS_CENSUS_LOG_H
-#define GRPC_CORE_LIB_STATISTICS_CENSUS_LOG_H
+#ifndef GRPC_CORE_EXT_CENSUS_CENSUS_LOG_H
+#define GRPC_CORE_EXT_CENSUS_CENSUS_LOG_H
 
 #include <stddef.h>
 
@@ -88,4 +88,4 @@ size_t census_log_remaining_space(void);
    out-of-space. */
 int census_log_out_of_space_count(void);
 
-#endif /* GRPC_CORE_LIB_STATISTICS_CENSUS_LOG_H */
+#endif /* GRPC_CORE_EXT_CENSUS_CENSUS_LOG_H */
diff --git a/src/core/lib/statistics/census_rpc_stats.c b/src/core/ext/census/census_rpc_stats.c
index 2182561668..09ee12d54b 100644
--- a/src/core/lib/statistics/census_rpc_stats.c
+++ b/src/core/ext/census/census_rpc_stats.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,11 +36,11 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
-#include "src/core/lib/statistics/census_interface.h"
-#include "src/core/lib/statistics/census_rpc_stats.h"
-#include "src/core/lib/statistics/census_tracing.h"
-#include "src/core/lib/statistics/hash_table.h"
-#include "src/core/lib/statistics/window_stats.h"
+#include "src/core/ext/census/census_interface.h"
+#include "src/core/ext/census/census_rpc_stats.h"
+#include "src/core/ext/census/census_tracing.h"
+#include "src/core/ext/census/hash_table.h"
+#include "src/core/ext/census/window_stats.h"
 #include "src/core/lib/support/murmur_hash.h"
 #include "src/core/lib/support/string.h"
 
diff --git a/src/core/lib/statistics/census_rpc_stats.h b/src/core/ext/census/census_rpc_stats.h
index 00bb48205e..7e4d8d1640 100644
--- a/src/core/lib/statistics/census_rpc_stats.h
+++ b/src/core/ext/census/census_rpc_stats.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_STATISTICS_CENSUS_RPC_STATS_H
-#define GRPC_CORE_LIB_STATISTICS_CENSUS_RPC_STATS_H
+#ifndef GRPC_CORE_EXT_CENSUS_CENSUS_RPC_STATS_H
+#define GRPC_CORE_EXT_CENSUS_CENSUS_RPC_STATS_H
 
 #include <grpc/support/port_platform.h>
-#include "src/core/lib/statistics/census_interface.h"
+#include "src/core/ext/census/census_interface.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -98,4 +98,4 @@ void census_stats_store_shutdown(void);
 }
 #endif
 
-#endif /* GRPC_CORE_LIB_STATISTICS_CENSUS_RPC_STATS_H */
+#endif /* GRPC_CORE_EXT_CENSUS_CENSUS_RPC_STATS_H */
diff --git a/src/core/lib/statistics/census_tracing.c b/src/core/ext/census/census_tracing.c
index b58ae733fc..f893dc9864 100644
--- a/src/core/lib/statistics/census_tracing.c
+++ b/src/core/ext/census/census_tracing.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#include "src/core/lib/statistics/census_tracing.h"
-#include "src/core/lib/statistics/census_interface.h"
+#include "src/core/ext/census/census_tracing.h"
+#include "src/core/ext/census/census_interface.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -41,7 +41,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/sync.h>
-#include "src/core/lib/statistics/hash_table.h"
+#include "src/core/ext/census/hash_table.h"
 #include "src/core/lib/support/string.h"
 
 void census_trace_obj_destroy(census_trace_obj *obj) {
diff --git a/src/core/lib/statistics/census_tracing.h b/src/core/ext/census/census_tracing.h
index a101abf3cb..42a0d7403e 100644
--- a/src/core/lib/statistics/census_tracing.h
+++ b/src/core/ext/census/census_tracing.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_STATISTICS_CENSUS_TRACING_H
-#define GRPC_CORE_LIB_STATISTICS_CENSUS_TRACING_H
+#ifndef GRPC_CORE_EXT_CENSUS_CENSUS_TRACING_H
+#define GRPC_CORE_EXT_CENSUS_CENSUS_TRACING_H
 
 #include <grpc/support/time.h>
-#include "src/core/lib/statistics/census_rpc_stats.h"
+#include "src/core/ext/census/census_rpc_stats.h"
 
 /* WARNING: The data structures and APIs provided by this file are for GRPC
    library's internal use ONLY. They might be changed in backward-incompatible
@@ -93,4 +93,4 @@ census_trace_obj **census_get_active_ops(int *num_active_ops);
 }
 #endif
 
-#endif /* GRPC_CORE_LIB_STATISTICS_CENSUS_TRACING_H */
+#endif /* GRPC_CORE_EXT_CENSUS_CENSUS_TRACING_H */
diff --git a/src/core/lib/census/context.c b/src/core/ext/census/context.c
index 5a118f46a9..0dfc4ecbf1 100644
--- a/src/core/lib/census/context.c
+++ b/src/core/ext/census/context.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/census/grpc_context.c b/src/core/ext/census/grpc_context.c
index 457c176355..98285ab2d5 100644
--- a/src/core/lib/census/grpc_context.c
+++ b/src/core/ext/census/grpc_context.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/census/grpc_filter.c b/src/core/ext/census/grpc_filter.c
index d27d789aa1..abfb3bb5f0 100644
--- a/src/core/lib/census/grpc_filter.c
+++ b/src/core/ext/census/grpc_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/census/grpc_filter.h"
+#include "src/core/ext/census/grpc_filter.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -42,9 +42,9 @@
 #include <grpc/support/slice.h>
 #include <grpc/support/time.h>
 
+#include "src/core/ext/census/census_interface.h"
+#include "src/core/ext/census/census_rpc_stats.h"
 #include "src/core/lib/channel/channel_stack.h"
-#include "src/core/lib/statistics/census_interface.h"
-#include "src/core/lib/statistics/census_rpc_stats.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 typedef struct call_data {
diff --git a/src/core/lib/census/grpc_filter.h b/src/core/ext/census/grpc_filter.h
index 7ceafe56e4..a39bd82224 100644
--- a/src/core/lib/census/grpc_filter.h
+++ b/src/core/ext/census/grpc_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CENSUS_GRPC_FILTER_H
-#define GRPC_CORE_LIB_CENSUS_GRPC_FILTER_H
+#ifndef GRPC_CORE_EXT_CENSUS_GRPC_FILTER_H
+#define GRPC_CORE_EXT_CENSUS_GRPC_FILTER_H
 
 #include "src/core/lib/channel/channel_stack.h"
 
@@ -41,4 +41,4 @@
 extern const grpc_channel_filter grpc_client_census_filter;
 extern const grpc_channel_filter grpc_server_census_filter;
 
-#endif /* GRPC_CORE_LIB_CENSUS_GRPC_FILTER_H */
+#endif /* GRPC_CORE_EXT_CENSUS_GRPC_FILTER_H */
diff --git a/src/core/lib/census/grpc_plugin.c b/src/core/ext/census/grpc_plugin.c
index 12aca76745..0f15ecb2c2 100644
--- a/src/core/lib/census/grpc_plugin.c
+++ b/src/core/ext/census/grpc_plugin.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,11 @@
  *
  */
 
-#include "src/core/lib/census/grpc_plugin.h"
-
 #include <limits.h>
 
 #include <grpc/census.h>
 
-#include "src/core/lib/census/grpc_filter.h"
+#include "src/core/ext/census/grpc_filter.h"
 #include "src/core/lib/channel/channel_stack_builder.h"
 #include "src/core/lib/surface/channel_init.h"
 
@@ -67,4 +65,4 @@ void census_grpc_plugin_init(void) {
                                    maybe_add_census_filter, NULL);
 }
 
-void census_grpc_plugin_destroy(void) { census_shutdown(); }
+void census_grpc_plugin_shutdown(void) { census_shutdown(); }
diff --git a/src/core/lib/statistics/hash_table.c b/src/core/ext/census/hash_table.c
index 18b7442a0c..ee6fdfc6e8 100644
--- a/src/core/lib/statistics/hash_table.c
+++ b/src/core/ext/census/hash_table.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/statistics/hash_table.h"
+#include "src/core/ext/census/hash_table.h"
 
 #include <stddef.h>
 #include <stdio.h>
diff --git a/src/core/lib/statistics/hash_table.h b/src/core/ext/census/hash_table.h
index 8f74ec82aa..30ea4264a2 100644
--- a/src/core/lib/statistics/hash_table.h
+++ b/src/core/ext/census/hash_table.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_STATISTICS_HASH_TABLE_H
-#define GRPC_CORE_LIB_STATISTICS_HASH_TABLE_H
+#ifndef GRPC_CORE_EXT_CENSUS_HASH_TABLE_H
+#define GRPC_CORE_EXT_CENSUS_HASH_TABLE_H
 
 #include <stddef.h>
 
@@ -128,4 +128,4 @@ typedef void (*census_ht_itr_cb)(census_ht_key key, const void *val_ptr,
    should not invalidate data entries. */
 uint64_t census_ht_for_all(const census_ht *ht, census_ht_itr_cb);
 
-#endif /* GRPC_CORE_LIB_STATISTICS_HASH_TABLE_H */
+#endif /* GRPC_CORE_EXT_CENSUS_HASH_TABLE_H */
diff --git a/src/core/lib/census/initialize.c b/src/core/ext/census/initialize.c
index ce7ec09b89..896276e44a 100644
--- a/src/core/lib/census/initialize.c
+++ b/src/core/ext/census/initialize.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/census/mlog.c b/src/core/ext/census/mlog.c
index 9d47e80297..698b7096ab 100644
--- a/src/core/lib/census/mlog.c
+++ b/src/core/ext/census/mlog.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -88,7 +88,7 @@
 // include the name of the structure, which will be passed as the first
 // argument. E.g. cl_block_initialize() will initialize a cl_block.
 
-#include "src/core/lib/census/mlog.h"
+#include "src/core/ext/census/mlog.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
 #include <grpc/support/cpu.h>
diff --git a/src/core/lib/census/mlog.h b/src/core/ext/census/mlog.h
index 7fbdeda986..a256426f91 100644
--- a/src/core/lib/census/mlog.h
+++ b/src/core/ext/census/mlog.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,8 +33,8 @@
 
 /* A very fast in-memory log, optimized for multiple writers. */
 
-#ifndef GRPC_CORE_LIB_CENSUS_MLOG_H
-#define GRPC_CORE_LIB_CENSUS_MLOG_H
+#ifndef GRPC_CORE_EXT_CENSUS_MLOG_H
+#define GRPC_CORE_EXT_CENSUS_MLOG_H
 
 #include <grpc/support/port_platform.h>
 #include <stddef.h>
@@ -92,4 +92,4 @@ size_t census_log_remaining_space(void);
    out-of-space. */
 int64_t census_log_out_of_space_count(void);
 
-#endif /* GRPC_CORE_LIB_CENSUS_MLOG_H */
+#endif /* GRPC_CORE_EXT_CENSUS_MLOG_H */
diff --git a/src/core/lib/census/operation.c b/src/core/ext/census/operation.c
index 315f9c3534..5c58704372 100644
--- a/src/core/lib/census/operation.c
+++ b/src/core/ext/census/operation.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/census/placeholders.c b/src/core/ext/census/placeholders.c
index fe23d13971..fe23d13971 100644
--- a/src/core/lib/census/placeholders.c
+++ b/src/core/ext/census/placeholders.c
diff --git a/src/core/lib/census/rpc_metric_id.h b/src/core/ext/census/rpc_metric_id.h
index aad0588fb3..888ec500a7 100644
--- a/src/core/lib/census/rpc_metric_id.h
+++ b/src/core/ext/census/rpc_metric_id.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CENSUS_RPC_METRIC_ID_H
-#define GRPC_CORE_LIB_CENSUS_RPC_METRIC_ID_H
+#ifndef GRPC_CORE_EXT_CENSUS_RPC_METRIC_ID_H
+#define GRPC_CORE_EXT_CENSUS_RPC_METRIC_ID_H
 
 /* Metric ID's used for RPC measurements. */
 /* Count of client requests sent. */
@@ -48,4 +48,4 @@
 /* Server side request latency. */
 #define CENSUS_METRIC_RPC_SERVER_LATENCY ((uint32_t)5)
 
-#endif /* GRPC_CORE_LIB_CENSUS_RPC_METRIC_ID_H */
+#endif /* GRPC_CORE_EXT_CENSUS_RPC_METRIC_ID_H */
diff --git a/src/core/lib/census/tracing.c b/src/core/ext/census/tracing.c
index e508996af3..3b5d6dab2b 100644
--- a/src/core/lib/census/tracing.c
+++ b/src/core/ext/census/tracing.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/statistics/window_stats.c b/src/core/ext/census/window_stats.c
index 53427a24bc..5f7bd9952e 100644
--- a/src/core/lib/statistics/window_stats.c
+++ b/src/core/ext/census/window_stats.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/statistics/window_stats.h"
+#include "src/core/ext/census/window_stats.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
diff --git a/src/core/lib/statistics/window_stats.h b/src/core/ext/census/window_stats.h
index 8dec50d620..25658c9ce0 100644
--- a/src/core/lib/statistics/window_stats.h
+++ b/src/core/ext/census/window_stats.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_STATISTICS_WINDOW_STATS_H
-#define GRPC_CORE_LIB_STATISTICS_WINDOW_STATS_H
+#ifndef GRPC_CORE_EXT_CENSUS_WINDOW_STATS_H
+#define GRPC_CORE_EXT_CENSUS_WINDOW_STATS_H
 
 #include <grpc/support/time.h>
 
@@ -170,4 +170,4 @@ void census_window_stats_get_sums(const struct census_window_stats *wstats,
    assertion failure). This function is thread-compatible. */
 void census_window_stats_destroy(struct census_window_stats *wstats);
 
-#endif /* GRPC_CORE_LIB_STATISTICS_WINDOW_STATS_H */
+#endif /* GRPC_CORE_EXT_CENSUS_WINDOW_STATS_H */
diff --git a/src/core/lib/client_config/lb_policies/load_balancer_api.c b/src/core/ext/lb_policy/grpclb/load_balancer_api.c
index 4cbed200df..d8af644870 100644
--- a/src/core/lib/client_config/lb_policies/load_balancer_api.c
+++ b/src/core/ext/lb_policy/grpclb/load_balancer_api.c
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/client_config/lb_policies/load_balancer_api.h"
+#include "src/core/ext/lb_policy/grpclb/load_balancer_api.h"
 #include "third_party/nanopb/pb_decode.h"
 #include "third_party/nanopb/pb_encode.h"
 
diff --git a/src/core/lib/client_config/lb_policies/load_balancer_api.h b/src/core/ext/lb_policy/grpclb/load_balancer_api.h
index 83299adfa9..d329a2ffe8 100644
--- a/src/core/lib/client_config/lb_policies/load_balancer_api.h
+++ b/src/core/ext/lb_policy/grpclb/load_balancer_api.h
@@ -31,13 +31,13 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
-#define GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
+#ifndef GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H
+#define GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H
 
 #include <grpc/support/slice_buffer.h>
 
+#include "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.h"
 #include "src/core/lib/client_config/lb_policy_factory.h"
-#include "src/core/lib/proto/grpc/lb/v0/load_balancer.pb.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -82,4 +82,4 @@ void grpc_grpclb_response_destroy(grpc_grpclb_response *response);
 }
 #endif
 
-#endif /* GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H */
+#endif /* GRPC_CORE_EXT_LB_POLICY_GRPCLB_LOAD_BALANCER_API_H */
diff --git a/src/core/lib/proto/grpc/lb/v0/load_balancer.pb.c b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.c
index 8f82141f96..9719673181 100644
--- a/src/core/lib/proto/grpc/lb/v0/load_balancer.pb.c
+++ b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.c
@@ -33,7 +33,7 @@
 /* Automatically generated nanopb constant definitions */
 /* Generated by nanopb-0.3.5-dev */
 
-#include "src/core/lib/proto/grpc/lb/v0/load_balancer.pb.h"
+#include "src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.h"
 
 #if PB_PROTO_HEADER_VERSION != 30
 #error Regenerate this file with the current version of nanopb generator.
diff --git a/src/core/lib/proto/grpc/lb/v0/load_balancer.pb.h b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.h
index 3599f881bb..3599f881bb 100644
--- a/src/core/lib/proto/grpc/lb/v0/load_balancer.pb.h
+++ b/src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.h
diff --git a/src/core/lib/client_config/lb_policies/pick_first.c b/src/core/ext/lb_policy/pick_first/pick_first.c
index 2e399b73f9..cb5c40501e 100644
--- a/src/core/lib/client_config/lb_policies/pick_first.c
+++ b/src/core/ext/lb_policy/pick_first/pick_first.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,10 @@
  *
  */
 
-#include "src/core/lib/client_config/lb_policies/pick_first.h"
-#include "src/core/lib/client_config/lb_policy_factory.h"
-
 #include <string.h>
 
 #include <grpc/support/alloc.h>
+#include "src/core/lib/client_config/lb_policy_registry.h"
 #include "src/core/lib/transport/connectivity_state.h"
 
 typedef struct pending_pick {
@@ -78,7 +76,7 @@ typedef struct {
 #define GET_SELECTED(p) \
   ((grpc_connected_subchannel *)gpr_atm_acq_load(&(p)->selected))
 
-void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
+static void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   grpc_connected_subchannel *selected = GET_SELECTED(p);
   size_t i;
@@ -95,7 +93,7 @@ void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   gpr_free(p);
 }
 
-void pf_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
+static void pf_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   pending_pick *pp;
   grpc_connected_subchannel *selected;
@@ -162,7 +160,7 @@ static void start_picking(grpc_exec_ctx *exec_ctx, pick_first_lb_policy *p) {
       &p->connectivity_changed);
 }
 
-void pf_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
+static void pf_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   gpr_mu_lock(&p->mu);
   if (!p->started_picking) {
@@ -171,9 +169,10 @@ void pf_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   gpr_mu_unlock(&p->mu);
 }
 
-int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
-            grpc_metadata_batch *initial_metadata,
-            grpc_connected_subchannel **target, grpc_closure *on_complete) {
+static int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
+                   grpc_pollset *pollset, grpc_metadata_batch *initial_metadata,
+                   grpc_connected_subchannel **target,
+                   grpc_closure *on_complete) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   pending_pick *pp;
 
@@ -356,9 +355,10 @@ static grpc_connectivity_state pf_check_connectivity(grpc_exec_ctx *exec_ctx,
   return st;
 }
 
-void pf_notify_on_state_change(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                               grpc_connectivity_state *current,
-                               grpc_closure *notify) {
+static void pf_notify_on_state_change(grpc_exec_ctx *exec_ctx,
+                                      grpc_lb_policy *pol,
+                                      grpc_connectivity_state *current,
+                                      grpc_closure *notify) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   gpr_mu_lock(&p->mu);
   grpc_connectivity_state_notify_on_state_change(exec_ctx, &p->state_tracker,
@@ -366,8 +366,8 @@ void pf_notify_on_state_change(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   gpr_mu_unlock(&p->mu);
 }
 
-void pf_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                 grpc_closure *closure) {
+static void pf_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
+                        grpc_closure *closure) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   grpc_connected_subchannel *selected = GET_SELECTED(p);
   if (selected) {
@@ -391,19 +391,42 @@ static void pick_first_factory_ref(grpc_lb_policy_factory *factory) {}
 
 static void pick_first_factory_unref(grpc_lb_policy_factory *factory) {}
 
-static grpc_lb_policy *create_pick_first(grpc_lb_policy_factory *factory,
+static grpc_lb_policy *create_pick_first(grpc_exec_ctx *exec_ctx,
+                                         grpc_lb_policy_factory *factory,
                                          grpc_lb_policy_args *args) {
-  if (args->num_subchannels == 0) return NULL;
+  GPR_ASSERT(args->addresses != NULL);
+  GPR_ASSERT(args->subchannel_factory != NULL);
+
+  if (args->addresses->naddrs == 0) return NULL;
+
   pick_first_lb_policy *p = gpr_malloc(sizeof(*p));
   memset(p, 0, sizeof(*p));
-  grpc_lb_policy_init(&p->base, &pick_first_lb_policy_vtable);
+
   p->subchannels =
-      gpr_malloc(sizeof(grpc_subchannel *) * args->num_subchannels);
-  p->num_subchannels = args->num_subchannels;
-  grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
-                               "pick_first");
-  memcpy(p->subchannels, args->subchannels,
-         sizeof(grpc_subchannel *) * args->num_subchannels);
+      gpr_malloc(sizeof(grpc_subchannel *) * args->addresses->naddrs);
+  memset(p->subchannels, 0, sizeof(*p->subchannels) * args->addresses->naddrs);
+  grpc_subchannel_args sc_args;
+  size_t subchannel_idx = 0;
+  for (size_t i = 0; i < args->addresses->naddrs; i++) {
+    memset(&sc_args, 0, sizeof(grpc_subchannel_args));
+    sc_args.addr = (struct sockaddr *)(args->addresses->addrs[i].addr);
+    sc_args.addr_len = (size_t)args->addresses->addrs[i].len;
+
+    grpc_subchannel *subchannel = grpc_subchannel_factory_create_subchannel(
+        exec_ctx, args->subchannel_factory, &sc_args);
+
+    if (subchannel != NULL) {
+      p->subchannels[subchannel_idx++] = subchannel;
+    }
+  }
+  if (subchannel_idx == 0) {
+    gpr_free(p->subchannels);
+    gpr_free(p);
+    return NULL;
+  }
+  p->num_subchannels = subchannel_idx;
+
+  grpc_lb_policy_init(&p->base, &pick_first_lb_policy_vtable);
   grpc_closure_init(&p->connectivity_changed, pf_connectivity_changed, p);
   gpr_mu_init(&p->mu);
   return &p->base;
@@ -416,6 +439,14 @@ static const grpc_lb_policy_factory_vtable pick_first_factory_vtable = {
 static grpc_lb_policy_factory pick_first_lb_policy_factory = {
     &pick_first_factory_vtable};
 
-grpc_lb_policy_factory *grpc_pick_first_lb_factory_create() {
+static grpc_lb_policy_factory *pick_first_lb_factory_create() {
   return &pick_first_lb_policy_factory;
 }
+
+/* Plugin registration */
+
+void grpc_lb_policy_pick_first_init() {
+  grpc_register_lb_policy(pick_first_lb_factory_create());
+}
+
+void grpc_lb_policy_pick_first_shutdown() {}
diff --git a/src/core/lib/client_config/lb_policies/round_robin.c b/src/core/ext/lb_policy/round_robin/round_robin.c
index c904c5f921..d94c081494 100644
--- a/src/core/lib/client_config/lb_policies/round_robin.c
+++ b/src/core/ext/lb_policy/round_robin/round_robin.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,12 @@
  *
  */
 
-#include "src/core/lib/client_config/lb_policies/round_robin.h"
-
 #include <string.h>
 
 #include <grpc/support/alloc.h>
+
+#include "src/core/lib/client_config/lb_policy_registry.h"
+#include "src/core/lib/debug/trace.h"
 #include "src/core/lib/transport/connectivity_state.h"
 
 typedef struct round_robin_lb_policy round_robin_lb_policy;
@@ -199,7 +200,7 @@ static void remove_disconnected_sc_locked(round_robin_lb_policy *p,
   gpr_free(node);
 }
 
-void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
+static void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   size_t i;
   ready_list *elem;
@@ -226,7 +227,7 @@ void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   gpr_free(p);
 }
 
-void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
+static void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   pending_pick *pp;
   size_t i;
@@ -291,7 +292,7 @@ static void start_picking(grpc_exec_ctx *exec_ctx, round_robin_lb_policy *p) {
   }
 }
 
-void rr_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
+static void rr_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   gpr_mu_lock(&p->mu);
   if (!p->started_picking) {
@@ -300,9 +301,10 @@ void rr_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   gpr_mu_unlock(&p->mu);
 }
 
-int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
-            grpc_metadata_batch *initial_metadata,
-            grpc_connected_subchannel **target, grpc_closure *on_complete) {
+static int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
+                   grpc_pollset *pollset, grpc_metadata_batch *initial_metadata,
+                   grpc_connected_subchannel **target,
+                   grpc_closure *on_complete) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   pending_pick *pp;
   ready_list *selected;
@@ -496,30 +498,47 @@ static void round_robin_factory_ref(grpc_lb_policy_factory *factory) {}
 
 static void round_robin_factory_unref(grpc_lb_policy_factory *factory) {}
 
-static grpc_lb_policy *create_round_robin(grpc_lb_policy_factory *factory,
+static grpc_lb_policy *create_round_robin(grpc_exec_ctx *exec_ctx,
+                                          grpc_lb_policy_factory *factory,
                                           grpc_lb_policy_args *args) {
-  size_t i;
+  GPR_ASSERT(args->addresses != NULL);
+  GPR_ASSERT(args->subchannel_factory != NULL);
+
   round_robin_lb_policy *p = gpr_malloc(sizeof(*p));
-  GPR_ASSERT(args->num_subchannels > 0);
   memset(p, 0, sizeof(*p));
-  grpc_lb_policy_init(&p->base, &round_robin_lb_policy_vtable);
-  p->num_subchannels = args->num_subchannels;
-  p->subchannels = gpr_malloc(sizeof(*p->subchannels) * p->num_subchannels);
-  memset(p->subchannels, 0, sizeof(*p->subchannels) * p->num_subchannels);
-  grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
-                               "round_robin");
 
-  gpr_mu_init(&p->mu);
-  for (i = 0; i < args->num_subchannels; i++) {
-    subchannel_data *sd = gpr_malloc(sizeof(*sd));
-    memset(sd, 0, sizeof(*sd));
-    p->subchannels[i] = sd;
-    sd->policy = p;
-    sd->index = i;
-    sd->subchannel = args->subchannels[i];
-    grpc_closure_init(&sd->connectivity_changed_closure,
-                      rr_connectivity_changed, sd);
+  p->subchannels =
+      gpr_malloc(sizeof(*p->subchannels) * args->addresses->naddrs);
+  memset(p->subchannels, 0, sizeof(*p->subchannels) * args->addresses->naddrs);
+
+  grpc_subchannel_args sc_args;
+  size_t subchannel_idx = 0;
+  for (size_t i = 0; i < args->addresses->naddrs; i++) {
+    memset(&sc_args, 0, sizeof(grpc_subchannel_args));
+    sc_args.addr = (struct sockaddr *)(args->addresses->addrs[i].addr);
+    sc_args.addr_len = (size_t)args->addresses->addrs[i].len;
+
+    grpc_subchannel *subchannel = grpc_subchannel_factory_create_subchannel(
+        exec_ctx, args->subchannel_factory, &sc_args);
+
+    if (subchannel != NULL) {
+      subchannel_data *sd = gpr_malloc(sizeof(*sd));
+      memset(sd, 0, sizeof(*sd));
+      p->subchannels[subchannel_idx] = sd;
+      sd->policy = p;
+      sd->index = subchannel_idx;
+      sd->subchannel = subchannel;
+      ++subchannel_idx;
+      grpc_closure_init(&sd->connectivity_changed_closure,
+                        rr_connectivity_changed, sd);
+    }
   }
+  if (subchannel_idx == 0) {
+    gpr_free(p->subchannels);
+    gpr_free(p);
+    return NULL;
+  }
+  p->num_subchannels = subchannel_idx;
 
   /* The (dummy node) root of the ready list */
   p->ready_list.subchannel = NULL;
@@ -527,6 +546,10 @@ static grpc_lb_policy *create_round_robin(grpc_lb_policy_factory *factory,
   p->ready_list.next = NULL;
   p->ready_list_last_pick = &p->ready_list;
 
+  grpc_lb_policy_init(&p->base, &round_robin_lb_policy_vtable);
+  grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
+                               "round_robin");
+  gpr_mu_init(&p->mu);
   return &p->base;
 }
 
@@ -537,6 +560,15 @@ static const grpc_lb_policy_factory_vtable round_robin_factory_vtable = {
 static grpc_lb_policy_factory round_robin_lb_policy_factory = {
     &round_robin_factory_vtable};
 
-grpc_lb_policy_factory *grpc_round_robin_lb_factory_create() {
+static grpc_lb_policy_factory *round_robin_lb_factory_create() {
   return &round_robin_lb_policy_factory;
 }
+
+/* Plugin registration */
+
+void grpc_lb_policy_round_robin_init() {
+  grpc_register_lb_policy(round_robin_lb_factory_create());
+  grpc_register_tracer("round_robin", &grpc_lb_round_robin_trace);
+}
+
+void grpc_lb_policy_round_robin_shutdown() {}
diff --git a/src/core/ext/resolver/dns/native/README.md b/src/core/ext/resolver/dns/native/README.md
new file mode 100644
index 0000000000..695de47b9f
--- /dev/null
+++ b/src/core/ext/resolver/dns/native/README.md
@@ -0,0 +1,2 @@
+dns: scheme name resolution, using getaddrbyname
+(or other OS specific implementation)
diff --git a/src/core/lib/client_config/resolvers/dns_resolver.c b/src/core/ext/resolver/dns/native/dns_resolver.c
index ab445730ad..70d8a3fe2d 100644
--- a/src/core/lib/client_config/resolvers/dns_resolver.c
+++ b/src/core/ext/resolver/dns/native/dns_resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,6 @@
  *
  */
 
-#include "src/core/lib/client_config/resolvers/dns_resolver.h"
-
 #include <string.h>
 
 #include <grpc/support/alloc.h>
@@ -40,6 +38,7 @@
 #include <grpc/support/string_util.h>
 
 #include "src/core/lib/client_config/lb_policy_registry.h"
+#include "src/core/lib/client_config/resolver_registry.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/timer.h"
 #include "src/core/lib/support/backoff.h"
@@ -162,38 +161,23 @@ static void dns_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
                             grpc_resolved_addresses *addresses) {
   dns_resolver *r = arg;
   grpc_client_config *config = NULL;
-  grpc_subchannel **subchannels;
-  grpc_subchannel_args args;
   grpc_lb_policy *lb_policy;
-  size_t i;
   gpr_mu_lock(&r->mu);
   GPR_ASSERT(r->resolving);
   r->resolving = 0;
   if (addresses != NULL) {
     grpc_lb_policy_args lb_policy_args;
     config = grpc_client_config_create();
-    subchannels = gpr_malloc(sizeof(grpc_subchannel *) * addresses->naddrs);
-    size_t naddrs = 0;
-    for (i = 0; i < addresses->naddrs; i++) {
-      memset(&args, 0, sizeof(args));
-      args.addr = (struct sockaddr *)(addresses->addrs[i].addr);
-      args.addr_len = (size_t)addresses->addrs[i].len;
-      grpc_subchannel *subchannel = grpc_subchannel_factory_create_subchannel(
-          exec_ctx, r->subchannel_factory, &args);
-      if (subchannel != NULL) {
-        subchannels[naddrs++] = subchannel;
-      }
-    }
     memset(&lb_policy_args, 0, sizeof(lb_policy_args));
-    lb_policy_args.subchannels = subchannels;
-    lb_policy_args.num_subchannels = naddrs;
-    lb_policy = grpc_lb_policy_create(r->lb_policy_name, &lb_policy_args);
+    lb_policy_args.addresses = addresses;
+    lb_policy_args.subchannel_factory = r->subchannel_factory;
+    lb_policy =
+        grpc_lb_policy_create(exec_ctx, r->lb_policy_name, &lb_policy_args);
     if (lb_policy != NULL) {
       grpc_client_config_set_lb_policy(config, lb_policy);
       GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "construction");
     }
     grpc_resolved_addresses_destroy(addresses);
-    gpr_free(subchannels);
   } else {
     gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
     gpr_timespec next_try = gpr_backoff_step(&r->backoff_state, now);
@@ -292,8 +276,8 @@ static grpc_resolver *dns_factory_create_resolver(
   return dns_create(args, "https", "pick_first");
 }
 
-char *dns_factory_get_default_host_name(grpc_resolver_factory *factory,
-                                        grpc_uri *uri) {
+static char *dns_factory_get_default_host_name(grpc_resolver_factory *factory,
+                                               grpc_uri *uri) {
   const char *path = uri->path;
   if (path[0] == '/') ++path;
   return gpr_strdup(path);
@@ -304,6 +288,12 @@ static const grpc_resolver_factory_vtable dns_factory_vtable = {
     dns_factory_get_default_host_name, "dns"};
 static grpc_resolver_factory dns_resolver_factory = {&dns_factory_vtable};
 
-grpc_resolver_factory *grpc_dns_resolver_factory_create() {
+static grpc_resolver_factory *dns_resolver_factory_create() {
   return &dns_resolver_factory;
 }
+
+void grpc_resolver_dns_native_init(void) {
+  grpc_register_resolver_type(dns_resolver_factory_create());
+}
+
+void grpc_resolver_dns_native_shutdown(void) {}
diff --git a/src/core/ext/resolver/sockaddr/README.md b/src/core/ext/resolver/sockaddr/README.md
new file mode 100644
index 0000000000..e307ba88f5
--- /dev/null
+++ b/src/core/ext/resolver/sockaddr/README.md
@@ -0,0 +1 @@
+Support for resolving ipv4:, ipv6:, unix: schemes
diff --git a/src/core/lib/client_config/resolvers/sockaddr_resolver.c b/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
index 66cddc3ed9..69595ca3db 100644
--- a/src/core/lib/client_config/resolvers/sockaddr_resolver.c
+++ b/src/core/ext/resolver/sockaddr/sockaddr_resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,8 +33,6 @@
 
 #include <grpc/support/port_platform.h>
 
-#include "src/core/lib/client_config/resolvers/sockaddr_resolver.h"
-
 #include <stdio.h>
 #include <string.h>
 
@@ -43,6 +41,7 @@
 #include <grpc/support/string_util.h>
 
 #include "src/core/lib/client_config/lb_policy_registry.h"
+#include "src/core/lib/client_config/resolver_registry.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/unix_sockets_posix.h"
 #include "src/core/lib/support/string.h"
@@ -58,11 +57,7 @@ typedef struct {
   char *lb_policy_name;
 
   /** the addresses that we've 'resolved' */
-  struct sockaddr_storage *addrs;
-  /** the corresponding length of the addresses */
-  size_t *addrs_len;
-  /** how many elements in \a addrs */
-  size_t num_addrs;
+  grpc_resolved_addresses *addresses;
 
   /** mutex guarding the rest of the state */
   gpr_mu mu;
@@ -125,28 +120,14 @@ static void sockaddr_next(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
 
 static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
                                               sockaddr_resolver *r) {
-  grpc_client_config *cfg;
-  grpc_lb_policy *lb_policy;
-  grpc_lb_policy_args lb_policy_args;
-  grpc_subchannel **subchannels;
-  grpc_subchannel_args args;
-
   if (r->next_completion != NULL && !r->published) {
-    size_t i;
-    cfg = grpc_client_config_create();
-    subchannels = gpr_malloc(sizeof(grpc_subchannel *) * r->num_addrs);
-    for (i = 0; i < r->num_addrs; i++) {
-      memset(&args, 0, sizeof(args));
-      args.addr = (struct sockaddr *)&r->addrs[i];
-      args.addr_len = r->addrs_len[i];
-      subchannels[i] = grpc_subchannel_factory_create_subchannel(
-          exec_ctx, r->subchannel_factory, &args);
-    }
+    grpc_client_config *cfg = grpc_client_config_create();
+    grpc_lb_policy_args lb_policy_args;
     memset(&lb_policy_args, 0, sizeof(lb_policy_args));
-    lb_policy_args.subchannels = subchannels;
-    lb_policy_args.num_subchannels = r->num_addrs;
-    lb_policy = grpc_lb_policy_create(r->lb_policy_name, &lb_policy_args);
-    gpr_free(subchannels);
+    lb_policy_args.addresses = r->addresses;
+    lb_policy_args.subchannel_factory = r->subchannel_factory;
+    grpc_lb_policy *lb_policy =
+        grpc_lb_policy_create(exec_ctx, r->lb_policy_name, &lb_policy_args);
     grpc_client_config_set_lb_policy(cfg, lb_policy);
     GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "sockaddr");
     r->published = 1;
@@ -160,8 +141,7 @@ static void sockaddr_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *gr) {
   sockaddr_resolver *r = (sockaddr_resolver *)gr;
   gpr_mu_destroy(&r->mu);
   grpc_subchannel_factory_unref(exec_ctx, r->subchannel_factory);
-  gpr_free(r->addrs);
-  gpr_free(r->addrs_len);
+  grpc_resolved_addresses_destroy(r->addresses);
   gpr_free(r->lb_policy_name);
   gpr_free(r);
 }
@@ -269,7 +249,6 @@ static void do_nothing(void *ignored) {}
 static grpc_resolver *sockaddr_create(
     grpc_resolver_args *args, const char *default_lb_policy_name,
     int parse(grpc_uri *uri, struct sockaddr_storage *dst, size_t *len)) {
-  size_t i;
   int errors_found = 0; /* GPR_FALSE */
   sockaddr_resolver *r;
   gpr_slice path_slice;
@@ -309,15 +288,18 @@ static grpc_resolver *sockaddr_create(
   gpr_slice_buffer_init(&path_parts);
 
   gpr_slice_split(path_slice, ",", &path_parts);
-  r->num_addrs = path_parts.count;
-  r->addrs = gpr_malloc(sizeof(struct sockaddr_storage) * r->num_addrs);
-  r->addrs_len = gpr_malloc(sizeof(*r->addrs_len) * r->num_addrs);
+  r->addresses = gpr_malloc(sizeof(grpc_resolved_addresses));
+  r->addresses->naddrs = path_parts.count;
+  r->addresses->addrs =
+      gpr_malloc(sizeof(grpc_resolved_address) * r->addresses->naddrs);
 
-  for (i = 0; i < r->num_addrs; i++) {
+  for (size_t i = 0; i < r->addresses->naddrs; i++) {
     grpc_uri ith_uri = *args->uri;
     char *part_str = gpr_dump_slice(path_parts.slices[i], GPR_DUMP_ASCII);
     ith_uri.path = part_str;
-    if (!parse(&ith_uri, &r->addrs[i], &r->addrs_len[i])) {
+    if (!parse(&ith_uri,
+               (struct sockaddr_storage *)(&r->addresses->addrs[i].addr),
+               &r->addresses->addrs[i].len)) {
       errors_found = 1; /* GPR_TRUE */
     }
     gpr_free(part_str);
@@ -328,8 +310,7 @@ static grpc_resolver *sockaddr_create(
   gpr_slice_unref(path_slice);
   if (errors_found) {
     gpr_free(r->lb_policy_name);
-    gpr_free(r->addrs);
-    gpr_free(r->addrs_len);
+    grpc_resolved_addresses_destroy(r->addresses);
     gpr_free(r);
     return NULL;
   }
@@ -361,12 +342,20 @@ static void sockaddr_factory_unref(grpc_resolver_factory *factory) {}
       name##_factory_create_resolver, prefix##name##_get_default_authority, \
       #name};                                                               \
   static grpc_resolver_factory name##_resolver_factory = {                  \
-      &name##_factory_vtable};                                              \
-  grpc_resolver_factory *grpc_##name##_resolver_factory_create() {          \
-    return &name##_resolver_factory;                                        \
-  }
+      &name##_factory_vtable}
 
 #ifdef GPR_HAVE_UNIX_SOCKET
-DECL_FACTORY(unix, grpc_)
+DECL_FACTORY(unix, grpc_);
 #endif
-DECL_FACTORY(ipv4, ) DECL_FACTORY(ipv6, )
+DECL_FACTORY(ipv4, );
+DECL_FACTORY(ipv6, );
+
+void grpc_resolver_sockaddr_init(void) {
+  grpc_register_resolver_type(&ipv4_resolver_factory);
+  grpc_register_resolver_type(&ipv6_resolver_factory);
+#ifdef GPR_HAVE_UNIX_SOCKET
+  grpc_register_resolver_type(&unix_resolver_factory);
+#endif
+}
+
+void grpc_resolver_sockaddr_shutdown(void) {}
diff --git a/src/core/ext/resolver/zookeeper/README.md b/src/core/ext/resolver/zookeeper/README.md
new file mode 100644
index 0000000000..ce6f39683b
--- /dev/null
+++ b/src/core/ext/resolver/zookeeper/README.md
@@ -0,0 +1 @@
+Zookeeper based name resolver: WIP
diff --git a/src/core/lib/client_config/resolvers/zookeeper_resolver.c b/src/core/ext/resolver/zookeeper/zookeeper_resolver.c
index 3bb0bbdf5c..5acb0940c6 100644
--- a/src/core/lib/client_config/resolvers/zookeeper_resolver.c
+++ b/src/core/ext/resolver/zookeeper/zookeeper_resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,6 @@
  *
  */
 
-#include "src/core/lib/client_config/resolvers/zookeeper_resolver.h"
-
 #include <string.h>
 
 #include <grpc/support/alloc.h>
@@ -184,28 +182,22 @@ static void zookeeper_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
                                   grpc_resolved_addresses *addresses) {
   zookeeper_resolver *r = arg;
   grpc_client_config *config = NULL;
-  grpc_subchannel **subchannels;
-  grpc_subchannel_args args;
   grpc_lb_policy *lb_policy;
-  size_t i;
+
   if (addresses != NULL) {
     grpc_lb_policy_args lb_policy_args;
     config = grpc_client_config_create();
-    subchannels = gpr_malloc(sizeof(grpc_subchannel *) * addresses->naddrs);
-    for (i = 0; i < addresses->naddrs; i++) {
-      memset(&args, 0, sizeof(args));
-      args.addr = (struct sockaddr *)(addresses->addrs[i].addr);
-      args.addr_len = addresses->addrs[i].len;
-      subchannels[i] = grpc_subchannel_factory_create_subchannel(
-          exec_ctx, r->subchannel_factory, &args);
+
+    lb_policy_args.addresses = addresses;
+    lb_policy_args.subchannel_factory = r->subchannel_factory;
+    lb_policy =
+        grpc_lb_policy_create(exec_ctx, r->lb_policy_name, &lb_policy_args);
+
+    if (lb_policy != NULL) {
+      grpc_client_config_set_lb_policy(config, lb_policy);
+      GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "construction");
     }
-    lb_policy_args.subchannels = subchannels;
-    lb_policy_args.num_subchannels = addresses->naddrs;
-    lb_policy = grpc_lb_policy_create(r->lb_policy_name, &lb_policy_args);
-    grpc_client_config_set_lb_policy(config, lb_policy);
-    GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "construction");
     grpc_resolved_addresses_destroy(addresses);
-    gpr_free(subchannels);
   }
   gpr_mu_lock(&r->mu);
   GPR_ASSERT(r->resolving == 1);
@@ -480,15 +472,6 @@ static grpc_resolver *zookeeper_create(grpc_resolver_args *args,
   return &r->base;
 }
 
-static void zookeeper_plugin_init() {
-  grpc_register_resolver_type(grpc_zookeeper_resolver_factory_create());
-}
-
-void grpc_zookeeper_register() {
-  GRPC_API_TRACE("grpc_zookeeper_register(void)", 0, ());
-  grpc_register_plugin(zookeeper_plugin_init, NULL);
-}
-
 /*
  * FACTORY
  */
@@ -515,6 +498,15 @@ static const grpc_resolver_factory_vtable zookeeper_factory_vtable = {
 static grpc_resolver_factory zookeeper_resolver_factory = {
     &zookeeper_factory_vtable};
 
-grpc_resolver_factory *grpc_zookeeper_resolver_factory_create() {
+static grpc_resolver_factory *zookeeper_resolver_factory_create() {
   return &zookeeper_resolver_factory;
 }
+
+static void zookeeper_plugin_init() {
+  grpc_register_resolver_type(zookeeper_resolver_factory_create());
+}
+
+void grpc_zookeeper_register() {
+  GRPC_API_TRACE("grpc_zookeeper_register(void)", 0, ());
+  grpc_register_plugin(zookeeper_plugin_init, NULL);
+}
diff --git a/src/core/ext/transport/chttp2/client/insecure/README.md b/src/core/ext/transport/chttp2/client/insecure/README.md
new file mode 100644
index 0000000000..fa11463388
--- /dev/null
+++ b/src/core/ext/transport/chttp2/client/insecure/README.md
@@ -0,0 +1 @@
+Plugin for creating insecure channels using chttp2
diff --git a/src/core/lib/surface/channel_create.c b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
index e8777ce816..606fff5fb4 100644
--- a/src/core/lib/surface/channel_create.c
+++ b/src/core/ext/transport/chttp2/client/insecure/channel_create.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,7 +40,8 @@
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
 
-#include "src/core/lib/census/grpc_filter.h"
+#include "src/core/ext/census/grpc_filter.h"
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/client_channel.h"
 #include "src/core/lib/channel/compress_filter.h"
@@ -49,7 +50,6 @@
 #include "src/core/lib/iomgr/tcp_client.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/channel.h"
-#include "src/core/lib/transport/chttp2_transport.h"
 
 typedef struct {
   grpc_connector base;
diff --git a/src/core/ext/transport/chttp2/client/secure/README.md b/src/core/ext/transport/chttp2/client/secure/README.md
new file mode 100644
index 0000000000..405a86e5db
--- /dev/null
+++ b/src/core/ext/transport/chttp2/client/secure/README.md
@@ -0,0 +1 @@
+Plugin for creating secure channels using chttp2
diff --git a/src/core/lib/surface/secure_channel_create.c b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
index dcb367023e..3465d2b6c4 100644
--- a/src/core/lib/surface/secure_channel_create.c
+++ b/src/core/ext/transport/chttp2/client/secure/secure_channel_create.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,6 +40,7 @@
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
 
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/client_channel.h"
 #include "src/core/lib/client_config/resolver_registry.h"
@@ -49,7 +50,6 @@
 #include "src/core/lib/security/security_context.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/channel.h"
-#include "src/core/lib/transport/chttp2_transport.h"
 #include "src/core/lib/tsi/transport_security_interface.h"
 
 typedef struct {
@@ -267,7 +267,7 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
     gpr_log(GPR_ERROR, "Cannot set security context in channel args.");
     grpc_exec_ctx_finish(&exec_ctx);
     return grpc_lame_client_channel_create(
-        target, GRPC_STATUS_INVALID_ARGUMENT,
+        target, GRPC_STATUS_INTERNAL,
         "Security connector exists in channel args.");
   }
 
@@ -276,8 +276,7 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
       GRPC_SECURITY_OK) {
     grpc_exec_ctx_finish(&exec_ctx);
     return grpc_lame_client_channel_create(
-        target, GRPC_STATUS_INVALID_ARGUMENT,
-        "Failed to create security connector.");
+        target, GRPC_STATUS_INTERNAL, "Failed to create security connector.");
   }
 
   connector_arg = grpc_security_connector_to_arg(&security_connector->base);
diff --git a/src/core/ext/transport/chttp2/server/insecure/README.md b/src/core/ext/transport/chttp2/server/insecure/README.md
new file mode 100644
index 0000000000..fc0bc14ed7
--- /dev/null
+++ b/src/core/ext/transport/chttp2/server/insecure/README.md
@@ -0,0 +1 @@
+Plugin for creating insecure servers using chttp2
diff --git a/src/core/lib/surface/server_chttp2.c b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
index f0c2ee5153..e21fa2a072 100644
--- a/src/core/lib/surface/server_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/insecure/server_chttp2.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,12 +36,12 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/http_server_filter.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/tcp_server.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/server.h"
-#include "src/core/lib/transport/chttp2_transport.h"
 
 static void setup_transport(grpc_exec_ctx *exec_ctx, void *server,
                             grpc_transport *transport) {
diff --git a/src/core/ext/transport/chttp2/server/secure/README.md b/src/core/ext/transport/chttp2/server/secure/README.md
new file mode 100644
index 0000000000..6bda696a9a
--- /dev/null
+++ b/src/core/ext/transport/chttp2/server/secure/README.md
@@ -0,0 +1 @@
+Plugin for creating secure servers using chttp2
diff --git a/src/core/lib/security/server_secure_chttp2.c b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
index 7c9dd221ed..698b2bef61 100644
--- a/src/core/lib/security/server_secure_chttp2.c
+++ b/src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,6 +39,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/useful.h>
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/http_server_filter.h"
 #include "src/core/lib/iomgr/endpoint.h"
@@ -50,7 +51,6 @@
 #include "src/core/lib/security/security_context.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/server.h"
-#include "src/core/lib/transport/chttp2_transport.h"
 
 typedef struct grpc_server_secure_state {
   grpc_server *server;
diff --git a/src/core/ext/transport/chttp2/transport/README.md b/src/core/ext/transport/chttp2/transport/README.md
new file mode 100644
index 0000000000..4684e58759
--- /dev/null
+++ b/src/core/ext/transport/chttp2/transport/README.md
@@ -0,0 +1,4 @@
+chttp2 transport plugin - implements grpc over http2
+
+Used by chttp2/{client,server}/{insecure,secure} plugins to implement most of
+their functionality
diff --git a/src/core/lib/transport/chttp2/alpn.c b/src/core/ext/transport/chttp2/transport/alpn.c
index befe319180..4271d08ded 100644
--- a/src/core/lib/transport/chttp2/alpn.c
+++ b/src/core/ext/transport/chttp2/transport/alpn.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/alpn.h"
+#include "src/core/ext/transport/chttp2/transport/alpn.h"
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
diff --git a/src/core/lib/transport/chttp2/alpn.h b/src/core/ext/transport/chttp2/transport/alpn.h
index a9184e63a4..08a6f039f4 100644
--- a/src/core/lib/transport/chttp2/alpn.h
+++ b/src/core/ext/transport/chttp2/transport/alpn.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_ALPN_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_ALPN_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_ALPN_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_ALPN_H
 
 #include <string.h>
 
@@ -46,4 +46,4 @@ size_t grpc_chttp2_num_alpn_versions(void);
  * grpc_chttp2_num_alpn_versions()) */
 const char *grpc_chttp2_get_alpn_version_index(size_t i);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_ALPN_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_ALPN_H */
diff --git a/src/core/lib/transport/chttp2/bin_encoder.c b/src/core/ext/transport/chttp2/transport/bin_encoder.c
index 79d0aa3d6f..71c634e39b 100644
--- a/src/core/lib/transport/chttp2/bin_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/bin_encoder.h"
+#include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
 
 #include <string.h>
 
 #include <grpc/support/log.h>
-#include "src/core/lib/transport/chttp2/huffsyms.h"
+#include "src/core/ext/transport/chttp2/transport/huffsyms.h"
 
 static const char alphabet[] =
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
diff --git a/src/core/lib/transport/chttp2/bin_encoder.h b/src/core/ext/transport/chttp2/transport/bin_encoder.h
index 1c5cd1e1c6..660f114ebc 100644
--- a/src/core/lib/transport/chttp2/bin_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/bin_encoder.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_BIN_ENCODER_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_BIN_ENCODER_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_ENCODER_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_ENCODER_H
 
 #include <grpc/support/slice.h>
 
@@ -51,4 +51,4 @@ gpr_slice grpc_chttp2_huffman_compress(gpr_slice input);
    return y; */
 gpr_slice grpc_chttp2_base64_encode_and_huffman_compress(gpr_slice input);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_BIN_ENCODER_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_ENCODER_H */
diff --git a/src/core/lib/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index 7fed3d8b47..62f0c53e0d 100644
--- a/src/core/lib/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 
 #include <math.h>
 #include <stdio.h>
@@ -43,12 +43,12 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/ext/transport/chttp2/transport/http2_errors.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
+#include "src/core/ext/transport/chttp2/transport/status_conversion.h"
+#include "src/core/ext/transport/chttp2/transport/timeout_encoding.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/string.h"
-#include "src/core/lib/transport/chttp2/http2_errors.h"
-#include "src/core/lib/transport/chttp2/internal.h"
-#include "src/core/lib/transport/chttp2/status_conversion.h"
-#include "src/core/lib/transport/chttp2/timeout_encoding.h"
 #include "src/core/lib/transport/static_metadata.h"
 #include "src/core/lib/transport/transport_impl.h"
 
@@ -758,23 +758,35 @@ static void maybe_start_some_streams(
   }
 }
 
+#define CLOSURE_BARRIER_STATS_BIT (1 << 0)
+#define CLOSURE_BARRIER_FAILURE_BIT (1 << 1)
+#define CLOSURE_BARRIER_FIRST_REF_BIT (1 << 16)
+
 static grpc_closure *add_closure_barrier(grpc_closure *closure) {
-  closure->final_data += 2;
+  closure->final_data += CLOSURE_BARRIER_FIRST_REF_BIT;
   return closure;
 }
 
 void grpc_chttp2_complete_closure_step(grpc_exec_ctx *exec_ctx,
+                                       grpc_chttp2_stream_global *stream_global,
                                        grpc_closure **pclosure, int success) {
   grpc_closure *closure = *pclosure;
   if (closure == NULL) {
     return;
   }
-  closure->final_data -= 2;
+  closure->final_data -= CLOSURE_BARRIER_FIRST_REF_BIT;
   if (!success) {
-    closure->final_data |= 1;
+    closure->final_data |= CLOSURE_BARRIER_FAILURE_BIT;
   }
-  if (closure->final_data < 2) {
-    grpc_exec_ctx_enqueue(exec_ctx, closure, closure->final_data == 0, NULL);
+  if (closure->final_data < CLOSURE_BARRIER_FIRST_REF_BIT) {
+    if (closure->final_data & CLOSURE_BARRIER_STATS_BIT) {
+      grpc_transport_move_stats(&stream_global->stats,
+                                stream_global->collecting_stats);
+      stream_global->collecting_stats = NULL;
+    }
+    grpc_exec_ctx_enqueue(
+        exec_ctx, closure,
+        (closure->final_data & CLOSURE_BARRIER_FAILURE_BIT) == 0, NULL);
   }
   *pclosure = NULL;
 }
@@ -807,7 +819,13 @@ static void perform_stream_op_locked(
   }
   /* use final_data as a barrier until enqueue time; the inital counter is
      dropped at the end of this function */
-  on_complete->final_data = 2;
+  on_complete->final_data = CLOSURE_BARRIER_FIRST_REF_BIT;
+
+  if (op->collect_stats != NULL) {
+    GPR_ASSERT(stream_global->collecting_stats == NULL);
+    stream_global->collecting_stats = op->collect_stats;
+    on_complete->final_data |= CLOSURE_BARRIER_STATS_BIT;
+  }
 
   if (op->cancel_with_status != GRPC_STATUS_OK) {
     cancel_from_api(exec_ctx, transport_global, stream_global,
@@ -840,7 +858,8 @@ static void perform_stream_op_locked(
       }
     } else {
       grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->send_initial_metadata_finished, 0);
+          exec_ctx, stream_global,
+          &stream_global->send_initial_metadata_finished, 0);
     }
   }
 
@@ -850,7 +869,7 @@ static void perform_stream_op_locked(
     stream_global->send_message_finished = add_closure_barrier(on_complete);
     if (stream_global->write_closed) {
       grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->send_message_finished, 0);
+          exec_ctx, stream_global, &stream_global->send_message_finished, 0);
     } else {
       stream_global->send_message = op->send_message;
       if (stream_global->id != 0) {
@@ -870,7 +889,8 @@ static void perform_stream_op_locked(
     }
     if (stream_global->write_closed) {
       grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->send_trailing_metadata_finished,
+          exec_ctx, stream_global,
+          &stream_global->send_trailing_metadata_finished,
           grpc_metadata_batch_is_empty(op->send_trailing_metadata));
     } else if (stream_global->id != 0) {
       /* TODO(ctiller): check if there's flow control for any outstanding
@@ -909,7 +929,7 @@ static void perform_stream_op_locked(
     grpc_chttp2_list_add_check_read_ops(transport_global, stream_global);
   }
 
-  grpc_chttp2_complete_closure_step(exec_ctx, &on_complete, 1);
+  grpc_chttp2_complete_closure_step(exec_ctx, stream_global, &on_complete, 1);
 
   GPR_TIMER_END("perform_stream_op_locked", 0);
 }
@@ -1080,7 +1100,8 @@ static void check_read_ops(grpc_exec_ctx *exec_ctx,
             &stream_global->received_trailing_metadata,
             stream_global->recv_trailing_metadata);
         grpc_chttp2_complete_closure_step(
-            exec_ctx, &stream_global->recv_trailing_metadata_finished, 1);
+            exec_ctx, stream_global,
+            &stream_global->recv_trailing_metadata_finished, 1);
       }
     }
   }
@@ -1131,7 +1152,8 @@ static void cancel_from_api(grpc_exec_ctx *exec_ctx,
         &transport_global->qbuf,
         grpc_chttp2_rst_stream_create(
             stream_global->id,
-            (uint32_t)grpc_chttp2_grpc_status_to_http2_error(status)));
+            (uint32_t)grpc_chttp2_grpc_status_to_http2_error(status),
+            &stream_global->stats.outgoing));
   }
   grpc_chttp2_fake_status(exec_ctx, transport_global, stream_global, status,
                           NULL);
@@ -1179,10 +1201,12 @@ void grpc_chttp2_fake_status(grpc_exec_ctx *exec_ctx,
 static void fail_pending_writes(grpc_exec_ctx *exec_ctx,
                                 grpc_chttp2_stream_global *stream_global) {
   grpc_chttp2_complete_closure_step(
-      exec_ctx, &stream_global->send_initial_metadata_finished, 0);
+      exec_ctx, stream_global, &stream_global->send_initial_metadata_finished,
+      0);
   grpc_chttp2_complete_closure_step(
-      exec_ctx, &stream_global->send_trailing_metadata_finished, 0);
-  grpc_chttp2_complete_closure_step(exec_ctx,
+      exec_ctx, stream_global, &stream_global->send_trailing_metadata_finished,
+      0);
+  grpc_chttp2_complete_closure_step(exec_ctx, stream_global,
                                     &stream_global->send_message_finished, 0);
 }
 
@@ -1319,7 +1343,8 @@ static void close_from_api(grpc_exec_ctx *exec_ctx,
 
   gpr_slice_buffer_add(
       &transport_global->qbuf,
-      grpc_chttp2_rst_stream_create(stream_global->id, GRPC_CHTTP2_NO_ERROR));
+      grpc_chttp2_rst_stream_create(stream_global->id, GRPC_CHTTP2_NO_ERROR,
+                                    &stream_global->stats.outgoing));
 
   if (optional_message) {
     gpr_slice_ref(*optional_message);
diff --git a/src/core/lib/transport/chttp2_transport.h b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
index 5008cab7f8..5da4276f82 100644
--- a/src/core/lib/transport/chttp2_transport.h
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_TRANSPORT_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_TRANSPORT_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CHTTP2_TRANSPORT_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CHTTP2_TRANSPORT_H
 
 #include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/transport/transport.h"
@@ -48,4 +48,4 @@ void grpc_chttp2_transport_start_reading(grpc_exec_ctx *exec_ctx,
                                          grpc_transport *transport,
                                          gpr_slice *slices, size_t nslices);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_TRANSPORT_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CHTTP2_TRANSPORT_H */
diff --git a/src/core/lib/transport/chttp2/frame.h b/src/core/ext/transport/chttp2/transport/frame.h
index 4674bc9703..5c72d91c2a 100644
--- a/src/core/lib/transport/chttp2/frame.h
+++ b/src/core/ext/transport/chttp2/transport/frame.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
@@ -66,4 +66,4 @@ typedef struct grpc_chttp2_transport_parsing grpc_chttp2_transport_parsing;
 #define GRPC_CHTTP2_DATA_FLAG_PADDED 8
 #define GRPC_CHTTP2_FLAG_HAS_PRIORITY 0x20
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_H */
diff --git a/src/core/lib/transport/chttp2/frame_data.c b/src/core/ext/transport/chttp2/transport/frame_data.c
index cf25c3ccc1..9c301d1608 100644
--- a/src/core/lib/transport/chttp2/frame_data.c
+++ b/src/core/ext/transport/chttp2/transport/frame_data.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,15 +31,15 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/frame_data.h"
+#include "src/core/ext/transport/chttp2/transport/frame_data.h"
 
 #include <string.h>
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 #include "src/core/lib/support/string.h"
-#include "src/core/lib/transport/chttp2/internal.h"
 #include "src/core/lib/transport/transport.h"
 
 grpc_chttp2_parse_error grpc_chttp2_data_parser_init(
@@ -113,11 +113,13 @@ grpc_byte_stream *grpc_chttp2_incoming_frame_queue_pop(
 
 void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
                              uint32_t write_bytes, int is_eof,
+                             grpc_transport_one_way_stats *stats,
                              gpr_slice_buffer *outbuf) {
   gpr_slice hdr;
   uint8_t *p;
+  static const size_t header_size = 9;
 
-  hdr = gpr_slice_malloc(9);
+  hdr = gpr_slice_malloc(header_size);
   p = GPR_SLICE_START_PTR(hdr);
   GPR_ASSERT(write_bytes < (1 << 24));
   *p++ = (uint8_t)(write_bytes >> 16);
@@ -132,6 +134,9 @@ void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
   gpr_slice_buffer_add(outbuf, hdr);
 
   gpr_slice_buffer_move_first(inbuf, write_bytes, outbuf);
+
+  stats->framing_bytes += header_size;
+  stats->data_bytes += write_bytes;
 }
 
 grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
@@ -156,6 +161,7 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
   switch (p->state) {
   fh_0:
     case GRPC_CHTTP2_DATA_FH_0:
+      stream_parsing->stats.incoming.framing_bytes++;
       p->frame_type = *cur;
       switch (p->frame_type) {
         case 0:
@@ -174,6 +180,7 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
       }
     /* fallthrough */
     case GRPC_CHTTP2_DATA_FH_1:
+      stream_parsing->stats.incoming.framing_bytes++;
       p->frame_size = ((uint32_t)*cur) << 24;
       if (++cur == end) {
         p->state = GRPC_CHTTP2_DATA_FH_2;
@@ -181,6 +188,7 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
       }
     /* fallthrough */
     case GRPC_CHTTP2_DATA_FH_2:
+      stream_parsing->stats.incoming.framing_bytes++;
       p->frame_size |= ((uint32_t)*cur) << 16;
       if (++cur == end) {
         p->state = GRPC_CHTTP2_DATA_FH_3;
@@ -188,6 +196,7 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
       }
     /* fallthrough */
     case GRPC_CHTTP2_DATA_FH_3:
+      stream_parsing->stats.incoming.framing_bytes++;
       p->frame_size |= ((uint32_t)*cur) << 8;
       if (++cur == end) {
         p->state = GRPC_CHTTP2_DATA_FH_4;
@@ -195,6 +204,7 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
       }
     /* fallthrough */
     case GRPC_CHTTP2_DATA_FH_4:
+      stream_parsing->stats.incoming.framing_bytes++;
       p->frame_size |= ((uint32_t)*cur);
       p->state = GRPC_CHTTP2_DATA_FRAME;
       ++cur;
@@ -215,7 +225,9 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
       }
       grpc_chttp2_list_add_parsing_seen_stream(transport_parsing,
                                                stream_parsing);
-      if ((uint32_t)(end - cur) == p->frame_size) {
+      uint32_t remaining = (uint32_t)(end - cur);
+      if (remaining == p->frame_size) {
+        stream_parsing->stats.incoming.data_bytes += p->frame_size;
         grpc_chttp2_incoming_byte_stream_push(
             exec_ctx, p->parsing_frame,
             gpr_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
@@ -224,7 +236,8 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
         p->parsing_frame = NULL;
         p->state = GRPC_CHTTP2_DATA_FH_0;
         return GRPC_CHTTP2_PARSE_OK;
-      } else if ((uint32_t)(end - cur) > p->frame_size) {
+      } else if (remaining > p->frame_size) {
+        stream_parsing->stats.incoming.data_bytes += p->frame_size;
         grpc_chttp2_incoming_byte_stream_push(
             exec_ctx, p->parsing_frame,
             gpr_slice_sub(slice, (size_t)(cur - beg),
@@ -235,11 +248,12 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
         cur += p->frame_size;
         goto fh_0; /* loop */
       } else {
+        GPR_ASSERT(remaining <= p->frame_size);
         grpc_chttp2_incoming_byte_stream_push(
             exec_ctx, p->parsing_frame,
             gpr_slice_sub(slice, (size_t)(cur - beg), (size_t)(end - beg)));
-        GPR_ASSERT((size_t)(end - cur) <= p->frame_size);
-        p->frame_size -= (uint32_t)(end - cur);
+        p->frame_size -= remaining;
+        stream_parsing->stats.incoming.data_bytes += remaining;
         return GRPC_CHTTP2_PARSE_OK;
       }
   }
diff --git a/src/core/lib/transport/chttp2/frame_data.h b/src/core/ext/transport/chttp2/transport/frame_data.h
index da404a42c6..2ff32963d6 100644
--- a/src/core/lib/transport/chttp2/frame_data.h
+++ b/src/core/ext/transport/chttp2/transport/frame_data.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,16 +31,17 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_DATA_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_DATA_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H
 
 /* Parser for GRPC streams embedded in DATA frames */
 
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
 #include "src/core/lib/transport/byte_stream.h"
-#include "src/core/lib/transport/chttp2/frame.h"
+#include "src/core/lib/transport/transport.h"
 
 typedef enum {
   GRPC_CHTTP2_DATA_FH_0,
@@ -96,6 +97,7 @@ grpc_chttp2_parse_error grpc_chttp2_data_parser_parse(
 
 void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
                              uint32_t write_bytes, int is_eof,
+                             grpc_transport_one_way_stats *stats,
                              gpr_slice_buffer *outbuf);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_DATA_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_DATA_H */
diff --git a/src/core/lib/transport/chttp2/frame_goaway.c b/src/core/ext/transport/chttp2/transport/frame_goaway.c
index bb8c28df90..69accb7696 100644
--- a/src/core/lib/transport/chttp2/frame_goaway.c
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/frame_goaway.h"
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/frame_goaway.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <string.h>
 
diff --git a/src/core/lib/transport/chttp2/frame_goaway.h b/src/core/ext/transport/chttp2/transport/frame_goaway.h
index f64c44f3d9..7c38b26a39 100644
--- a/src/core/lib/transport/chttp2/frame_goaway.h
+++ b/src/core/ext/transport/chttp2/transport/frame_goaway.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,14 +31,14 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_GOAWAY_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_GOAWAY_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/transport/chttp2/frame.h"
 
 typedef enum {
   GRPC_CHTTP2_GOAWAY_LSI0,
@@ -74,4 +74,4 @@ void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
                                gpr_slice debug_data,
                                gpr_slice_buffer *slice_buffer);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_GOAWAY_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_GOAWAY_H */
diff --git a/src/core/lib/transport/chttp2/frame_ping.c b/src/core/ext/transport/chttp2/transport/frame_ping.c
index 14ca394264..7e1815f0fe 100644
--- a/src/core/lib/transport/chttp2/frame_ping.c
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/frame_ping.h"
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/frame_ping.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <string.h>
 
diff --git a/src/core/lib/transport/chttp2/frame_ping.h b/src/core/ext/transport/chttp2/transport/frame_ping.h
index 7640fc4773..4f7fcc1305 100644
--- a/src/core/lib/transport/chttp2/frame_ping.h
+++ b/src/core/ext/transport/chttp2/transport/frame_ping.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_PING_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_PING_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_PING_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_PING_H
 
 #include <grpc/support/slice.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/transport/chttp2/frame.h"
 
 typedef struct {
   uint8_t byte;
@@ -53,4 +53,4 @@ grpc_chttp2_parse_error grpc_chttp2_ping_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_PING_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_PING_H */
diff --git a/src/core/lib/transport/chttp2/frame_rst_stream.c b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
index 060912afc4..22467e9ddd 100644
--- a/src/core/lib/transport/chttp2/frame_rst_stream.c
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,15 +31,18 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/frame_rst_stream.h"
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/frame_rst_stream.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <grpc/support/log.h>
 
-#include "src/core/lib/transport/chttp2/frame.h"
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 
-gpr_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code) {
-  gpr_slice slice = gpr_slice_malloc(13);
+gpr_slice grpc_chttp2_rst_stream_create(uint32_t id, uint32_t code,
+                                        grpc_transport_one_way_stats *stats) {
+  static const size_t frame_size = 13;
+  gpr_slice slice = gpr_slice_malloc(frame_size);
+  stats->framing_bytes += frame_size;
   uint8_t *p = GPR_SLICE_START_PTR(slice);
 
   *p++ = 0;
@@ -84,6 +87,7 @@ grpc_chttp2_parse_error grpc_chttp2_rst_stream_parser_parse(
     cur++;
     p->byte++;
   }
+  stream_parsing->stats.incoming.framing_bytes += (uint64_t)(end - cur);
 
   if (p->byte == 4) {
     GPR_ASSERT(is_last);
diff --git a/src/core/lib/transport/chttp2/frame_rst_stream.h b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
index 93155fde9d..9c1e756a94 100644
--- a/src/core/lib/transport/chttp2/frame_rst_stream.h
+++ b/src/core/ext/transport/chttp2/transport/frame_rst_stream.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,19 +31,21 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_RST_STREAM_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_RST_STREAM_H
 
 #include <grpc/support/slice.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/transport/chttp2/frame.h"
+#include "src/core/lib/transport/transport.h"
 
 typedef struct {
   uint8_t byte;
   uint8_t reason_bytes[4];
 } grpc_chttp2_rst_stream_parser;
 
-gpr_slice grpc_chttp2_rst_stream_create(uint32_t stream_id, uint32_t code);
+gpr_slice grpc_chttp2_rst_stream_create(uint32_t stream_id, uint32_t code,
+                                        grpc_transport_one_way_stats *stats);
 
 grpc_chttp2_parse_error grpc_chttp2_rst_stream_parser_begin_frame(
     grpc_chttp2_rst_stream_parser *parser, uint32_t length, uint8_t flags);
@@ -52,4 +54,4 @@ grpc_chttp2_parse_error grpc_chttp2_rst_stream_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_RST_STREAM_H */
diff --git a/src/core/lib/transport/chttp2/frame_settings.c b/src/core/ext/transport/chttp2/transport/frame_settings.c
index 48429c2a78..a3c1e15f35 100644
--- a/src/core/lib/transport/chttp2/frame_settings.c
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,18 +31,18 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/frame_settings.h"
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/frame_settings.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <string.h>
 
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
+#include "src/core/ext/transport/chttp2/transport/frame.h"
+#include "src/core/ext/transport/chttp2/transport/http2_errors.h"
 #include "src/core/lib/debug/trace.h"
-#include "src/core/lib/transport/chttp2/frame.h"
-#include "src/core/lib/transport/chttp2/http2_errors.h"
-#include "src/core/lib/transport/chttp2_transport.h"
 
 #define MAX_MAX_HEADER_LIST_SIZE (1024 * 1024 * 1024)
 
diff --git a/src/core/lib/transport/chttp2/frame_settings.h b/src/core/ext/transport/chttp2/transport/frame_settings.h
index 8b294de021..d9e30f1ed0 100644
--- a/src/core/lib/transport/chttp2/frame_settings.h
+++ b/src/core/ext/transport/chttp2/transport/frame_settings.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,13 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_SETTINGS_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_SETTINGS_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/transport/chttp2/frame.h"
 
 typedef enum {
   GRPC_CHTTP2_SPS_ID0,
@@ -100,4 +100,4 @@ grpc_chttp2_parse_error grpc_chttp2_settings_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_SETTINGS_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H */
diff --git a/src/core/lib/transport/chttp2/frame_window_update.c b/src/core/ext/transport/chttp2/transport/frame_window_update.c
index 2ab5003316..90243418bd 100644
--- a/src/core/lib/transport/chttp2/frame_window_update.c
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,14 +31,16 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/frame_window_update.h"
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/frame_window_update.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <grpc/support/log.h>
 
-gpr_slice grpc_chttp2_window_update_create(uint32_t id,
-                                           uint32_t window_update) {
-  gpr_slice slice = gpr_slice_malloc(13);
+gpr_slice grpc_chttp2_window_update_create(
+    uint32_t id, uint32_t window_update, grpc_transport_one_way_stats *stats) {
+  static const size_t frame_size = 13;
+  gpr_slice slice = gpr_slice_malloc(frame_size);
+  stats->header_bytes += frame_size;
   uint8_t *p = GPR_SLICE_START_PTR(slice);
 
   GPR_ASSERT(window_update);
@@ -87,6 +89,10 @@ grpc_chttp2_parse_error grpc_chttp2_window_update_parser_parse(
     p->byte++;
   }
 
+  if (stream_parsing != NULL) {
+    stream_parsing->stats.incoming.framing_bytes += (uint32_t)(end - cur);
+  }
+
   if (p->byte == 4) {
     uint32_t received_update = p->amount;
     if (received_update == 0 || (received_update & 0x80000000u)) {
diff --git a/src/core/lib/transport/chttp2/frame_window_update.h b/src/core/ext/transport/chttp2/transport/frame_window_update.h
index 4b1aea294d..d6e87b9329 100644
--- a/src/core/lib/transport/chttp2/frame_window_update.h
+++ b/src/core/ext/transport/chttp2/transport/frame_window_update.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,13 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H
 
 #include <grpc/support/slice.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/transport/chttp2/frame.h"
+#include "src/core/lib/transport/transport.h"
 
 typedef struct {
   uint8_t byte;
@@ -44,7 +45,8 @@ typedef struct {
   uint32_t amount;
 } grpc_chttp2_window_update_parser;
 
-gpr_slice grpc_chttp2_window_update_create(uint32_t id, uint32_t window_delta);
+gpr_slice grpc_chttp2_window_update_create(uint32_t id, uint32_t window_delta,
+                                           grpc_transport_one_way_stats *stats);
 
 grpc_chttp2_parse_error grpc_chttp2_window_update_parser_begin_frame(
     grpc_chttp2_window_update_parser *parser, uint32_t length, uint8_t flags);
@@ -53,4 +55,4 @@ grpc_chttp2_parse_error grpc_chttp2_window_update_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_WINDOW_UPDATE_H */
diff --git a/src/core/lib/transport/chttp2/hpack_encoder.c b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
index 6b45929b04..807cb5c8f4 100644
--- a/src/core/lib/transport/chttp2/hpack_encoder.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/hpack_encoder.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_encoder.h"
 
 #include <assert.h>
 #include <string.h>
@@ -45,10 +45,10 @@
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
-#include "src/core/lib/transport/chttp2/bin_encoder.h"
-#include "src/core/lib/transport/chttp2/hpack_table.h"
-#include "src/core/lib/transport/chttp2/timeout_encoding.h"
-#include "src/core/lib/transport/chttp2/varint.h"
+#include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_table.h"
+#include "src/core/ext/transport/chttp2/transport/timeout_encoding.h"
+#include "src/core/ext/transport/chttp2/transport/varint.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 #define HASH_FRAGMENT_1(x) ((x)&255)
@@ -74,6 +74,7 @@ typedef struct {
   /* output stream id */
   uint32_t stream_id;
   gpr_slice_buffer *output;
+  grpc_transport_one_way_stats *stats;
 } framer_state;
 
 /* fills p (which is expected to be 9 bytes long) with a data frame header */
@@ -102,6 +103,7 @@ static void finish_frame(framer_state *st, int is_header_boundary,
       st->stream_id, st->output->length - st->output_length_at_start_of_frame,
       (uint8_t)((is_last_in_stream ? GRPC_CHTTP2_DATA_FLAG_END_STREAM : 0) |
                 (is_header_boundary ? GRPC_CHTTP2_DATA_FLAG_END_HEADERS : 0)));
+  st->stats->framing_bytes += 9;
   st->is_first_frame = 0;
 }
 
@@ -147,8 +149,10 @@ static void add_header_data(framer_state *st, gpr_slice slice) {
   remaining = GRPC_CHTTP2_MAX_PAYLOAD_LENGTH +
               st->output_length_at_start_of_frame - st->output->length;
   if (len <= remaining) {
+    st->stats->header_bytes += len;
     gpr_slice_buffer_add(st->output, slice);
   } else {
+    st->stats->header_bytes += remaining;
     gpr_slice_buffer_add(st->output, gpr_slice_split_head(&slice, remaining));
     finish_frame(st, 0, 0);
     begin_frame(st);
@@ -535,6 +539,7 @@ void grpc_chttp2_hpack_compressor_set_max_table_size(
 void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
                                uint32_t stream_id,
                                grpc_metadata_batch *metadata, int is_eof,
+                               grpc_transport_one_way_stats *stats,
                                gpr_slice_buffer *outbuf) {
   framer_state st;
   grpc_linked_mdelem *l;
@@ -546,6 +551,7 @@ void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c,
   st.stream_id = stream_id;
   st.output = outbuf;
   st.is_first_frame = 1;
+  st.stats = stats;
 
   /* Encode a metadata batch; store the returned values, representing
      a metadata element that needs to be unreffed back into the metadata
diff --git a/src/core/lib/transport/chttp2/hpack_encoder.h b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
index de46a8f146..0f7b0b063a 100644
--- a/src/core/lib/transport/chttp2/hpack_encoder.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_encoder.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,15 +31,16 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_ENCODER_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_ENCODER_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_ENCODER_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_ENCODER_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
-#include "src/core/lib/transport/chttp2/frame.h"
+#include "src/core/ext/transport/chttp2/transport/frame.h"
 #include "src/core/lib/transport/metadata.h"
 #include "src/core/lib/transport/metadata_batch.h"
+#include "src/core/lib/transport/transport.h"
 
 #define GRPC_CHTTP2_HPACKC_NUM_FILTERS 256
 #define GRPC_CHTTP2_HPACKC_NUM_VALUES 256
@@ -90,6 +91,7 @@ void grpc_chttp2_hpack_compressor_set_max_usable_size(
 
 void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c, uint32_t id,
                                grpc_metadata_batch *metadata, int is_eof,
+                               grpc_transport_one_way_stats *stats,
                                gpr_slice_buffer *outbuf);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_ENCODER_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_ENCODER_H */
diff --git a/src/core/lib/transport/chttp2/hpack_parser.c b/src/core/ext/transport/chttp2/transport/hpack_parser.c
index d41ebab147..a36d2fc382 100644
--- a/src/core/lib/transport/chttp2/hpack_parser.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/hpack_parser.h"
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_parser.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <assert.h>
 #include <stddef.h>
@@ -48,9 +48,11 @@
 #include <grpc/support/port_platform.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/string.h"
-#include "src/core/lib/transport/chttp2/bin_encoder.h"
+
+extern int grpc_http_trace;
 
 typedef enum {
   NOT_BINARY,
@@ -723,7 +725,9 @@ static int finish_indexed_field(grpc_chttp2_hpack_parser *p, const uint8_t *cur,
                                 const uint8_t *end) {
   grpc_mdelem *md = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   if (md == NULL) {
-    gpr_log(GPR_ERROR, "Invalid HPACK index received: %d", p->index);
+    if (grpc_http_trace) {
+      gpr_log(GPR_ERROR, "Invalid HPACK index received: %d", p->index);
+    }
     return 0;
   }
   GRPC_MDELEM_REF(md);
@@ -919,7 +923,9 @@ static int parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser *p,
 /* finish parsing a max table size change */
 static int finish_max_tbl_size(grpc_chttp2_hpack_parser *p, const uint8_t *cur,
                                const uint8_t *end) {
-  gpr_log(GPR_INFO, "MAX TABLE SIZE: %d", p->index);
+  if (grpc_http_trace) {
+    gpr_log(GPR_INFO, "MAX TABLE SIZE: %d", p->index);
+  }
   return grpc_chttp2_hptbl_set_current_table_size(&p->table, p->index) &&
          parse_begin(p, cur, end);
 }
@@ -960,7 +966,9 @@ static int parse_error(grpc_chttp2_hpack_parser *p, const uint8_t *cur,
 static int parse_illegal_op(grpc_chttp2_hpack_parser *p, const uint8_t *cur,
                             const uint8_t *end) {
   GPR_ASSERT(cur != end);
-  gpr_log(GPR_DEBUG, "Illegal hpack op code %d", *cur);
+  if (grpc_http_trace) {
+    gpr_log(GPR_DEBUG, "Illegal hpack op code %d", *cur);
+  }
   return parse_error(p, cur, end);
 }
 
@@ -1069,10 +1077,12 @@ static int parse_value4(grpc_chttp2_hpack_parser *p, const uint8_t *cur,
   }
 
 error:
-  gpr_log(GPR_ERROR,
-          "integer overflow in hpack integer decoding: have 0x%08x, "
-          "got byte 0x%02x on byte 5",
-          *p->parsing.value, *cur);
+  if (grpc_http_trace) {
+    gpr_log(GPR_ERROR,
+            "integer overflow in hpack integer decoding: have 0x%08x, "
+            "got byte 0x%02x on byte 5",
+            *p->parsing.value, *cur);
+  }
   return parse_error(p, cur, end);
 }
 
@@ -1094,10 +1104,12 @@ static int parse_value5up(grpc_chttp2_hpack_parser *p, const uint8_t *cur,
     return parse_next(p, cur + 1, end);
   }
 
-  gpr_log(GPR_ERROR,
-          "integer overflow in hpack integer decoding: have 0x%08x, "
-          "got byte 0x%02x sometime after byte 5",
-          *p->parsing.value, *cur);
+  if (grpc_http_trace) {
+    gpr_log(GPR_ERROR,
+            "integer overflow in hpack integer decoding: have 0x%08x, "
+            "got byte 0x%02x sometime after byte 5",
+            *p->parsing.value, *cur);
+  }
   return parse_error(p, cur, end);
 }
 
@@ -1329,7 +1341,9 @@ static is_binary_header is_binary_literal_header(grpc_chttp2_hpack_parser *p) {
 static is_binary_header is_binary_indexed_header(grpc_chttp2_hpack_parser *p) {
   grpc_mdelem *elem = grpc_chttp2_hptbl_lookup(&p->table, p->index);
   if (!elem) {
-    gpr_log(GPR_ERROR, "Invalid HPACK index received: %d", p->index);
+    if (grpc_http_trace) {
+      gpr_log(GPR_ERROR, "Invalid HPACK index received: %d", p->index);
+    }
     return ERROR_HEADER;
   }
   return grpc_is_binary_header(
@@ -1412,6 +1426,9 @@ grpc_chttp2_parse_error grpc_chttp2_header_parser_parse(
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last) {
   grpc_chttp2_hpack_parser *parser = hpack_parser;
   GPR_TIMER_BEGIN("grpc_chttp2_hpack_parser_parse", 0);
+  if (stream_parsing != NULL) {
+    stream_parsing->stats.incoming.header_bytes += GPR_SLICE_LENGTH(slice);
+  }
   if (!grpc_chttp2_hpack_parser_parse(parser, GPR_SLICE_START_PTR(slice),
                                       GPR_SLICE_END_PTR(slice))) {
     GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0);
diff --git a/src/core/lib/transport/chttp2/hpack_parser.h b/src/core/ext/transport/chttp2/transport/hpack_parser.h
index a534fd5cf4..855d6c5d52 100644
--- a/src/core/lib/transport/chttp2/hpack_parser.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_parser.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,15 +31,15 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_PARSER_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_PARSER_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H
 
 #include <stddef.h>
 
 #include <grpc/support/port_platform.h>
+#include "src/core/ext/transport/chttp2/transport/frame.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_table.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/transport/chttp2/frame.h"
-#include "src/core/lib/transport/chttp2/hpack_table.h"
 #include "src/core/lib/transport/metadata.h"
 
 typedef struct grpc_chttp2_hpack_parser grpc_chttp2_hpack_parser;
@@ -113,4 +113,4 @@ grpc_chttp2_parse_error grpc_chttp2_header_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_PARSER_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_PARSER_H */
diff --git a/src/core/lib/transport/chttp2/hpack_table.c b/src/core/ext/transport/chttp2/transport/hpack_table.c
index f92bc26585..4d64506de2 100644
--- a/src/core/lib/transport/chttp2/hpack_table.c
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/hpack_table.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_table.h"
 
 #include <assert.h>
 #include <string.h>
@@ -41,6 +41,8 @@
 
 #include "src/core/lib/support/murmur_hash.h"
 
+extern int grpc_http_trace;
+
 static struct {
   const char *key;
   const char *value;
@@ -264,12 +266,16 @@ int grpc_chttp2_hptbl_set_current_table_size(grpc_chttp2_hptbl *tbl,
     return 1;
   }
   if (bytes > tbl->max_bytes) {
-    gpr_log(GPR_ERROR,
-            "Attempt to make hpack table %d bytes when max is %d bytes", bytes,
-            tbl->max_bytes);
+    if (grpc_http_trace) {
+      gpr_log(GPR_ERROR,
+              "Attempt to make hpack table %d bytes when max is %d bytes",
+              bytes, tbl->max_bytes);
+    }
     return 0;
   }
-  gpr_log(GPR_DEBUG, "Update hpack parser table size to %d", bytes);
+  if (grpc_http_trace) {
+    gpr_log(GPR_DEBUG, "Update hpack parser table size to %d", bytes);
+  }
   while (tbl->mem_used > bytes) {
     evict1(tbl);
   }
@@ -293,10 +299,12 @@ int grpc_chttp2_hptbl_add(grpc_chttp2_hptbl *tbl, grpc_mdelem *md) {
                       GRPC_CHTTP2_HPACK_ENTRY_OVERHEAD;
 
   if (tbl->current_table_bytes > tbl->max_bytes) {
-    gpr_log(GPR_ERROR,
-            "HPACK max table size reduced to %d but not reflected by hpack "
-            "stream (still at %d)",
-            tbl->max_bytes, tbl->current_table_bytes);
+    if (grpc_http_trace) {
+      gpr_log(GPR_ERROR,
+              "HPACK max table size reduced to %d but not reflected by hpack "
+              "stream (still at %d)",
+              tbl->max_bytes, tbl->current_table_bytes);
+    }
     return 0;
   }
 
diff --git a/src/core/lib/transport/chttp2/hpack_table.h b/src/core/ext/transport/chttp2/transport/hpack_table.h
index 2cbc02dd9c..074fea36d8 100644
--- a/src/core/lib/transport/chttp2/hpack_table.h
+++ b/src/core/ext/transport/chttp2/transport/hpack_table.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_TABLE_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_TABLE_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_TABLE_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_TABLE_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
@@ -105,4 +105,4 @@ typedef struct {
 grpc_chttp2_hptbl_find_result grpc_chttp2_hptbl_find(
     const grpc_chttp2_hptbl *tbl, grpc_mdelem *md);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_HPACK_TABLE_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HPACK_TABLE_H */
diff --git a/src/core/lib/transport/chttp2/hpack_tables.txt b/src/core/ext/transport/chttp2/transport/hpack_tables.txt
index 08842a0267..08842a0267 100644
--- a/src/core/lib/transport/chttp2/hpack_tables.txt
+++ b/src/core/ext/transport/chttp2/transport/hpack_tables.txt
diff --git a/src/core/lib/transport/chttp2/http2_errors.h b/src/core/ext/transport/chttp2/transport/http2_errors.h
index 0238f9d80b..deab2b7e3e 100644
--- a/src/core/lib/transport/chttp2/http2_errors.h
+++ b/src/core/ext/transport/chttp2/transport/http2_errors.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_HTTP2_ERRORS_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_HTTP2_ERRORS_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_ERRORS_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_ERRORS_H
 
 /* error codes for RST_STREAM from http2 draft 14 section 7 */
 typedef enum {
@@ -53,4 +53,4 @@ typedef enum {
   GRPC_CHTTP2__ERROR_DO_NOT_USE = -1
 } grpc_chttp2_error_code;
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_HTTP2_ERRORS_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HTTP2_ERRORS_H */
diff --git a/src/core/lib/transport/chttp2/huffsyms.c b/src/core/ext/transport/chttp2/transport/huffsyms.c
index 27497e6ae0..68b34e4e2d 100644
--- a/src/core/lib/transport/chttp2/huffsyms.c
+++ b/src/core/ext/transport/chttp2/transport/huffsyms.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/huffsyms.h"
+#include "src/core/ext/transport/chttp2/transport/huffsyms.h"
 
 /* Constants pulled from the HPACK spec, and converted to C using the vim
    command:
diff --git a/src/core/lib/transport/chttp2/huffsyms.h b/src/core/ext/transport/chttp2/transport/huffsyms.h
index 1ca77b9207..fee00954a0 100644
--- a/src/core/lib/transport/chttp2/huffsyms.h
+++ b/src/core/ext/transport/chttp2/transport/huffsyms.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_HUFFSYMS_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_HUFFSYMS_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HUFFSYMS_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HUFFSYMS_H
 
 /* HPACK static huffman table */
 
@@ -45,4 +45,4 @@ typedef struct {
 
 extern const grpc_chttp2_huffsym grpc_chttp2_huffsyms[GRPC_CHTTP2_NUM_HUFFSYMS];
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_HUFFSYMS_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_HUFFSYMS_H */
diff --git a/src/core/lib/transport/chttp2/incoming_metadata.c b/src/core/ext/transport/chttp2/transport/incoming_metadata.c
index a1a8d37562..db21744f0c 100644
--- a/src/core/lib/transport/chttp2/incoming_metadata.c
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/incoming_metadata.h"
+#include "src/core/ext/transport/chttp2/transport/incoming_metadata.h"
 
 #include <string.h>
 
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
diff --git a/src/core/lib/transport/chttp2/incoming_metadata.h b/src/core/ext/transport/chttp2/transport/incoming_metadata.h
index edfa0adf9d..17ecf8e181 100644
--- a/src/core/lib/transport/chttp2/incoming_metadata.h
+++ b/src/core/ext/transport/chttp2/transport/incoming_metadata.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_INCOMING_METADATA_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_INCOMING_METADATA_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INCOMING_METADATA_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INCOMING_METADATA_H
 
 #include "src/core/lib/transport/transport.h"
 
@@ -57,4 +57,4 @@ void grpc_chttp2_incoming_metadata_buffer_add(
 void grpc_chttp2_incoming_metadata_buffer_set_deadline(
     grpc_chttp2_incoming_metadata_buffer *buffer, gpr_timespec deadline);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_INCOMING_METADATA_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INCOMING_METADATA_H */
diff --git a/src/core/lib/transport/chttp2/internal.h b/src/core/ext/transport/chttp2/transport/internal.h
index 346e404204..98cd38abd4 100644
--- a/src/core/lib/transport/chttp2/internal.h
+++ b/src/core/ext/transport/chttp2/transport/internal.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,24 +31,24 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_INTERNAL_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_INTERNAL_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INTERNAL_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INTERNAL_H
 
 #include <assert.h>
 #include <stdbool.h>
 
+#include "src/core/ext/transport/chttp2/transport/frame.h"
+#include "src/core/ext/transport/chttp2/transport/frame_data.h"
+#include "src/core/ext/transport/chttp2/transport/frame_goaway.h"
+#include "src/core/ext/transport/chttp2/transport/frame_ping.h"
+#include "src/core/ext/transport/chttp2/transport/frame_rst_stream.h"
+#include "src/core/ext/transport/chttp2/transport/frame_settings.h"
+#include "src/core/ext/transport/chttp2/transport/frame_window_update.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_encoder.h"
+#include "src/core/ext/transport/chttp2/transport/hpack_parser.h"
+#include "src/core/ext/transport/chttp2/transport/incoming_metadata.h"
+#include "src/core/ext/transport/chttp2/transport/stream_map.h"
 #include "src/core/lib/iomgr/endpoint.h"
-#include "src/core/lib/transport/chttp2/frame.h"
-#include "src/core/lib/transport/chttp2/frame_data.h"
-#include "src/core/lib/transport/chttp2/frame_goaway.h"
-#include "src/core/lib/transport/chttp2/frame_ping.h"
-#include "src/core/lib/transport/chttp2/frame_rst_stream.h"
-#include "src/core/lib/transport/chttp2/frame_settings.h"
-#include "src/core/lib/transport/chttp2/frame_window_update.h"
-#include "src/core/lib/transport/chttp2/hpack_encoder.h"
-#include "src/core/lib/transport/chttp2/hpack_parser.h"
-#include "src/core/lib/transport/chttp2/incoming_metadata.h"
-#include "src/core/lib/transport/chttp2/stream_map.h"
 #include "src/core/lib/transport/connectivity_state.h"
 #include "src/core/lib/transport/transport_impl.h"
 
@@ -394,6 +394,9 @@ typedef struct {
   grpc_metadata_batch *recv_trailing_metadata;
   grpc_closure *recv_trailing_metadata_finished;
 
+  grpc_transport_stream_stats *collecting_stats;
+  grpc_transport_stream_stats stats;
+
   /** when the application requests writes be closed, the write_closed is
       'queued'; when the close is flow controlled into the send path, we are
       'sending' it; when the write has been performed it is 'sent' */
@@ -435,6 +438,8 @@ typedef struct {
   gpr_slice fetching_slice;
   size_t stream_fetched;
   grpc_closure finished_fetch;
+  /** stats gathered during the write */
+  grpc_transport_one_way_stats stats;
 } grpc_chttp2_stream_writing;
 
 struct grpc_chttp2_stream_parsing {
@@ -460,6 +465,8 @@ struct grpc_chttp2_stream_parsing {
   int64_t outgoing_window;
   /** number of bytes received - reset at end of parse thread execution */
   int64_t received_bytes;
+  /** stats gathered during the parse */
+  grpc_transport_stream_stats stats;
 
   /** incoming metadata */
   grpc_chttp2_incoming_metadata_buffer metadata_buffer[2];
@@ -635,6 +642,7 @@ void grpc_chttp2_parsing_become_skip_parser(
     grpc_exec_ctx *exec_ctx, grpc_chttp2_transport_parsing *transport_parsing);
 
 void grpc_chttp2_complete_closure_step(grpc_exec_ctx *exec_ctx,
+                                       grpc_chttp2_stream_global *stream_global,
                                        grpc_closure **pclosure, int success);
 
 #define GRPC_CHTTP2_CLIENT_CONNECT_STRING "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
@@ -777,4 +785,4 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx,
 void grpc_chttp2_become_writable(grpc_chttp2_transport_global *transport_global,
                                  grpc_chttp2_stream_global *stream_global);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_INTERNAL_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_INTERNAL_H */
diff --git a/src/core/lib/transport/chttp2/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c
index 9ee52f63f2..c754c6005e 100644
--- a/src/core/lib/transport/chttp2/parsing.c
+++ b/src/core/ext/transport/chttp2/transport/parsing.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <string.h>
 
@@ -39,10 +39,10 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/ext/transport/chttp2/transport/http2_errors.h"
+#include "src/core/ext/transport/chttp2/transport/status_conversion.h"
+#include "src/core/ext/transport/chttp2/transport/timeout_encoding.h"
 #include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/transport/chttp2/http2_errors.h"
-#include "src/core/lib/transport/chttp2/status_conversion.h"
-#include "src/core/lib/transport/chttp2/timeout_encoding.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 static int init_frame_parser(grpc_exec_ctx *exec_ctx,
@@ -171,6 +171,9 @@ void grpc_chttp2_publish_reads(
       grpc_chttp2_list_add_check_read_ops(transport_global, stream_global);
     }
 
+    /* flush stats to global stream state */
+    grpc_transport_move_stats(&stream_parsing->stats, &stream_global->stats);
+
     /* update outgoing flow control window */
     was_zero = stream_global->outgoing_window <= 0;
     GRPC_CHTTP2_FLOW_MOVE_STREAM("parsed", transport_global, stream_global,
@@ -544,8 +547,13 @@ static int init_data_frame_parser(
       grpc_chttp2_parsing_lookup_stream(transport_parsing,
                                         transport_parsing->incoming_stream_id);
   grpc_chttp2_parse_error err = GRPC_CHTTP2_PARSE_OK;
-  if (!stream_parsing || stream_parsing->received_close)
+  if (stream_parsing == NULL) {
+    return init_skip_frame_parser(exec_ctx, transport_parsing, 0);
+  }
+  stream_parsing->stats.incoming.framing_bytes += 9;
+  if (stream_parsing->received_close) {
     return init_skip_frame_parser(exec_ctx, transport_parsing, 0);
+  }
   if (err == GRPC_CHTTP2_PARSE_OK) {
     err = update_incoming_window(exec_ctx, transport_parsing, stream_parsing);
   }
@@ -566,7 +574,8 @@ static int init_data_frame_parser(
       gpr_slice_buffer_add(
           &transport_parsing->qbuf,
           grpc_chttp2_rst_stream_create(transport_parsing->incoming_stream_id,
-                                        GRPC_CHTTP2_PROTOCOL_ERROR));
+                                        GRPC_CHTTP2_PROTOCOL_ERROR,
+                                        &stream_parsing->stats.outgoing));
       return init_skip_frame_parser(exec_ctx, transport_parsing, 0);
     case GRPC_CHTTP2_CONNECTION_ERROR:
       return 0;
@@ -717,6 +726,7 @@ static int init_header_frame_parser(
     transport_parsing->incoming_stream = stream_parsing;
   }
   GPR_ASSERT(stream_parsing != NULL && (via_accept == 0 || via_accept == 1));
+  stream_parsing->stats.incoming.framing_bytes += 9;
   if (stream_parsing->received_close) {
     gpr_log(GPR_ERROR, "skipping already closed grpc_chttp2_stream header");
     transport_parsing->incoming_stream = NULL;
@@ -752,9 +762,14 @@ static int init_window_update_frame_parser(
                                        &transport_parsing->simple.window_update,
                                        transport_parsing->incoming_frame_size,
                                        transport_parsing->incoming_frame_flags);
-  if (transport_parsing->incoming_stream_id) {
-    transport_parsing->incoming_stream = grpc_chttp2_parsing_lookup_stream(
-        transport_parsing, transport_parsing->incoming_stream_id);
+  if (transport_parsing->incoming_stream_id != 0) {
+    grpc_chttp2_stream_parsing *stream_parsing =
+        transport_parsing->incoming_stream = grpc_chttp2_parsing_lookup_stream(
+            transport_parsing, transport_parsing->incoming_stream_id);
+    if (stream_parsing == NULL) {
+      return init_skip_frame_parser(exec_ctx, transport_parsing, 0);
+    }
+    stream_parsing->stats.incoming.framing_bytes += 9;
   }
   transport_parsing->parser = grpc_chttp2_window_update_parser_parse;
   transport_parsing->parser_data = &transport_parsing->simple.window_update;
@@ -778,11 +793,13 @@ static int init_rst_stream_parser(
                                        &transport_parsing->simple.rst_stream,
                                        transport_parsing->incoming_frame_size,
                                        transport_parsing->incoming_frame_flags);
-  transport_parsing->incoming_stream = grpc_chttp2_parsing_lookup_stream(
-      transport_parsing, transport_parsing->incoming_stream_id);
+  grpc_chttp2_stream_parsing *stream_parsing =
+      transport_parsing->incoming_stream = grpc_chttp2_parsing_lookup_stream(
+          transport_parsing, transport_parsing->incoming_stream_id);
   if (!transport_parsing->incoming_stream) {
     return init_skip_frame_parser(exec_ctx, transport_parsing, 0);
   }
+  stream_parsing->stats.incoming.framing_bytes += 9;
   transport_parsing->parser = grpc_chttp2_rst_stream_parser_parse;
   transport_parsing->parser_data = &transport_parsing->simple.rst_stream;
   return ok;
@@ -856,7 +873,8 @@ static int parse_frame_slice(grpc_exec_ctx *exec_ctx,
         gpr_slice_buffer_add(
             &transport_parsing->qbuf,
             grpc_chttp2_rst_stream_create(transport_parsing->incoming_stream_id,
-                                          GRPC_CHTTP2_PROTOCOL_ERROR));
+                                          GRPC_CHTTP2_PROTOCOL_ERROR,
+                                          &stream_parsing->stats.outgoing));
       }
       return 1;
     case GRPC_CHTTP2_CONNECTION_ERROR:
diff --git a/src/core/lib/transport/chttp2/status_conversion.c b/src/core/ext/transport/chttp2/transport/status_conversion.c
index 73dd63e720..c42fb9b3a1 100644
--- a/src/core/lib/transport/chttp2/status_conversion.c
+++ b/src/core/ext/transport/chttp2/transport/status_conversion.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/status_conversion.h"
+#include "src/core/ext/transport/chttp2/transport/status_conversion.h"
 
 int grpc_chttp2_grpc_status_to_http2_error(grpc_status_code status) {
   switch (status) {
diff --git a/src/core/lib/transport/chttp2/status_conversion.h b/src/core/ext/transport/chttp2/transport/status_conversion.h
index 241417d32e..e7285e6fd5 100644
--- a/src/core/lib/transport/chttp2/status_conversion.h
+++ b/src/core/ext/transport/chttp2/transport/status_conversion.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_STATUS_CONVERSION_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_STATUS_CONVERSION_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STATUS_CONVERSION_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STATUS_CONVERSION_H
 
 #include <grpc/grpc.h>
-#include "src/core/lib/transport/chttp2/http2_errors.h"
+#include "src/core/ext/transport/chttp2/transport/http2_errors.h"
 
 /* Conversion of grpc status codes to http2 error codes (for RST_STREAM) */
 grpc_chttp2_error_code grpc_chttp2_grpc_status_to_http2_error(
@@ -47,4 +47,4 @@ grpc_status_code grpc_chttp2_http2_error_to_grpc_status(
 grpc_status_code grpc_chttp2_http2_status_to_grpc_status(int status);
 int grpc_chttp2_grpc_status_to_http2_status(grpc_status_code status);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_STATUS_CONVERSION_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STATUS_CONVERSION_H */
diff --git a/src/core/lib/transport/chttp2/stream_lists.c b/src/core/ext/transport/chttp2/transport/stream_lists.c
index b51a041dc7..e5b35aadca 100644
--- a/src/core/lib/transport/chttp2/stream_lists.c
+++ b/src/core/ext/transport/chttp2/transport/stream_lists.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <grpc/support/log.h>
 
diff --git a/src/core/lib/transport/chttp2/stream_map.c b/src/core/ext/transport/chttp2/transport/stream_map.c
index dbbbe783bf..f70791c422 100644
--- a/src/core/lib/transport/chttp2/stream_map.c
+++ b/src/core/ext/transport/chttp2/transport/stream_map.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/stream_map.h"
+#include "src/core/ext/transport/chttp2/transport/stream_map.h"
 
 #include <string.h>
 
diff --git a/src/core/lib/transport/chttp2/stream_map.h b/src/core/ext/transport/chttp2/transport/stream_map.h
index 1c56b18e54..b1d59ca6a3 100644
--- a/src/core/lib/transport/chttp2/stream_map.h
+++ b/src/core/ext/transport/chttp2/transport/stream_map.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_STREAM_MAP_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_STREAM_MAP_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H
 
 #include <grpc/support/port_platform.h>
 
@@ -81,4 +81,4 @@ void grpc_chttp2_stream_map_for_each(grpc_chttp2_stream_map *map,
                                                void *value),
                                      void *user_data);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_STREAM_MAP_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_STREAM_MAP_H */
diff --git a/src/core/lib/transport/chttp2/timeout_encoding.c b/src/core/ext/transport/chttp2/transport/timeout_encoding.c
index 0edacaafd3..b7f7912493 100644
--- a/src/core/lib/transport/chttp2/timeout_encoding.c
+++ b/src/core/ext/transport/chttp2/transport/timeout_encoding.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/timeout_encoding.h"
+#include "src/core/ext/transport/chttp2/transport/timeout_encoding.h"
 
 #include <stdio.h>
 #include <string.h>
diff --git a/src/core/lib/transport/chttp2/timeout_encoding.h b/src/core/ext/transport/chttp2/transport/timeout_encoding.h
index 731beb5a37..df2324c791 100644
--- a/src/core/lib/transport/chttp2/timeout_encoding.h
+++ b/src/core/ext/transport/chttp2/transport/timeout_encoding.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_TIMEOUT_ENCODING_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_TIMEOUT_ENCODING_H
 
 #include <grpc/support/time.h>
 #include "src/core/lib/support/string.h"
@@ -44,4 +44,4 @@
 void grpc_chttp2_encode_timeout(gpr_timespec timeout, char *buffer);
 int grpc_chttp2_decode_timeout(const char *buffer, gpr_timespec *timeout);
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_TIMEOUT_ENCODING_H */
diff --git a/src/core/lib/transport/chttp2/varint.c b/src/core/ext/transport/chttp2/transport/varint.c
index 6dfef45362..e434ad3c07 100644
--- a/src/core/lib/transport/chttp2/varint.c
+++ b/src/core/ext/transport/chttp2/transport/varint.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/varint.h"
+#include "src/core/ext/transport/chttp2/transport/varint.h"
 
 uint32_t grpc_chttp2_hpack_varint_length(uint32_t tail_value) {
   if (tail_value < (1 << 7)) {
diff --git a/src/core/lib/transport/chttp2/varint.h b/src/core/ext/transport/chttp2/transport/varint.h
index e4a0ae3c22..450e5fd119 100644
--- a/src/core/lib/transport/chttp2/varint.h
+++ b/src/core/ext/transport/chttp2/transport/varint.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_TRANSPORT_CHTTP2_VARINT_H
-#define GRPC_CORE_LIB_TRANSPORT_CHTTP2_VARINT_H
+#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_VARINT_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_VARINT_H
 
 #include <grpc/support/port_platform.h>
 
@@ -72,4 +72,4 @@ void grpc_chttp2_hpack_write_varint_tail(uint32_t tail_value, uint8_t* target,
     }                                                                         \
   } while (0)
 
-#endif /* GRPC_CORE_LIB_TRANSPORT_CHTTP2_VARINT_H */
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_VARINT_H */
diff --git a/src/core/lib/transport/chttp2/writing.c b/src/core/ext/transport/chttp2/transport/writing.c
index daea331d31..a8fb463939 100644
--- a/src/core/lib/transport/chttp2/writing.c
+++ b/src/core/ext/transport/chttp2/transport/writing.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,14 +31,14 @@
  *
  */
 
-#include "src/core/lib/transport/chttp2/internal.h"
+#include "src/core/ext/transport/chttp2/transport/internal.h"
 
 #include <limits.h>
 
 #include <grpc/support/log.h>
 
+#include "src/core/ext/transport/chttp2/transport/http2_errors.h"
 #include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/transport/chttp2/http2_errors.h"
 
 static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
                             grpc_chttp2_transport_writing *transport_writing);
@@ -161,8 +161,10 @@ int grpc_chttp2_unlocking_check_writes(
         transport_global->announce_incoming_window, UINT32_MAX);
     GRPC_CHTTP2_FLOW_DEBIT_TRANSPORT("write", transport_global,
                                      announce_incoming_window, announced);
-    gpr_slice_buffer_add(&transport_writing->outbuf,
-                         grpc_chttp2_window_update_create(0, announced));
+    grpc_transport_one_way_stats throwaway_stats;
+    gpr_slice_buffer_add(
+        &transport_writing->outbuf,
+        grpc_chttp2_window_update_create(0, announced, &throwaway_stats));
   }
 
   GPR_TIMER_END("grpc_chttp2_unlocking_check_writes", 0);
@@ -205,7 +207,8 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
     if (stream_writing->send_initial_metadata != NULL) {
       grpc_chttp2_encode_header(
           &transport_writing->hpack_compressor, stream_writing->id,
-          stream_writing->send_initial_metadata, 0, &transport_writing->outbuf);
+          stream_writing->send_initial_metadata, 0, &stream_writing->stats,
+          &transport_writing->outbuf);
       stream_writing->send_initial_metadata = NULL;
       stream_writing->sent_initial_metadata = 1;
     }
@@ -216,7 +219,8 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
       gpr_slice_buffer_add(
           &transport_writing->outbuf,
           grpc_chttp2_window_update_create(stream_writing->id,
-                                           stream_writing->announce_window));
+                                           stream_writing->announce_window,
+                                           &stream_writing->stats));
       GRPC_CHTTP2_FLOW_DEBIT_STREAM("write", transport_writing, stream_writing,
                                     announce_window, announce);
       stream_writing->announce_window = 0;
@@ -255,7 +259,8 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
                                 stream_writing->send_trailing_metadata);
         grpc_chttp2_encode_data(
             stream_writing->id, &stream_writing->flow_controlled_buffer,
-            send_bytes, is_last_frame, &transport_writing->outbuf);
+            send_bytes, is_last_frame, &stream_writing->stats,
+            &transport_writing->outbuf);
         GRPC_CHTTP2_FLOW_DEBIT_STREAM("write", transport_writing,
                                       stream_writing, outgoing_window,
                                       send_bytes);
@@ -281,19 +286,20 @@ static void finalize_outbuf(grpc_exec_ctx *exec_ctx,
         stream_writing->send_trailing_metadata != NULL) {
       if (grpc_metadata_batch_is_empty(
               stream_writing->send_trailing_metadata)) {
-        grpc_chttp2_encode_data(stream_writing->id,
-                                &stream_writing->flow_controlled_buffer, 0, 1,
-                                &transport_writing->outbuf);
+        grpc_chttp2_encode_data(
+            stream_writing->id, &stream_writing->flow_controlled_buffer, 0, 1,
+            &stream_writing->stats, &transport_writing->outbuf);
       } else {
-        grpc_chttp2_encode_header(&transport_writing->hpack_compressor,
-                                  stream_writing->id,
-                                  stream_writing->send_trailing_metadata, 1,
-                                  &transport_writing->outbuf);
+        grpc_chttp2_encode_header(
+            &transport_writing->hpack_compressor, stream_writing->id,
+            stream_writing->send_trailing_metadata, 1, &stream_writing->stats,
+            &transport_writing->outbuf);
       }
       if (!transport_writing->is_client && !stream_writing->read_closed) {
         gpr_slice_buffer_add(&transport_writing->outbuf,
                              grpc_chttp2_rst_stream_create(
-                                 stream_writing->id, GRPC_CHTTP2_NO_ERROR));
+                                 stream_writing->id, GRPC_CHTTP2_NO_ERROR,
+                                 &stream_writing->stats));
       }
       stream_writing->send_trailing_metadata = NULL;
       stream_writing->sent_trailing_metadata = 1;
@@ -328,17 +334,21 @@ void grpc_chttp2_cleanup_writing(
       transport_global, transport_writing, &stream_global, &stream_writing)) {
     if (stream_writing->sent_initial_metadata) {
       grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->send_initial_metadata_finished, 1);
+          exec_ctx, stream_global,
+          &stream_global->send_initial_metadata_finished, 1);
     }
+    grpc_transport_move_one_way_stats(&stream_writing->stats,
+                                      &stream_global->stats.outgoing);
     if (stream_writing->sent_message) {
       GPR_ASSERT(stream_writing->send_message == NULL);
       grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->send_message_finished, 1);
+          exec_ctx, stream_global, &stream_global->send_message_finished, 1);
       stream_writing->sent_message = 0;
     }
     if (stream_writing->sent_trailing_metadata) {
       grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->send_trailing_metadata_finished, 1);
+          exec_ctx, stream_global,
+          &stream_global->send_trailing_metadata_finished, 1);
     }
     if (stream_writing->sent_trailing_metadata) {
       grpc_chttp2_mark_stream_closed(exec_ctx, transport_global, stream_global,
diff --git a/src/core/lib/channel/channel_args.c b/src/core/lib/channel/channel_args.c
index 1a02f1f4aa..b7393b988d 100644
--- a/src/core/lib/channel/channel_args.c
+++ b/src/core/lib/channel/channel_args.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/channel_args.h b/src/core/lib/channel/channel_args.h
index 67d287ec6b..0a51780a14 100644
--- a/src/core/lib/channel/channel_args.h
+++ b/src/core/lib/channel/channel_args.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,23 +37,23 @@
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
 
-/* Copy some arguments */
+/** Copy the arguments in \a src into a new instance */
 grpc_channel_args *grpc_channel_args_copy(const grpc_channel_args *src);
 
-/* Copy some arguments, stably sorting keys */
-grpc_channel_args *grpc_channel_args_normalize(const grpc_channel_args *a);
+/** Copy the arguments in \a src into a new instance, stably sorting keys */
+grpc_channel_args *grpc_channel_args_normalize(const grpc_channel_args *src);
 
-/** Copy some arguments and add the to_add parameter in the end.
-   If to_add is NULL, it is equivalent to call grpc_channel_args_copy. */
+/** Copy the arguments in \a src and append \a to_add. If \a to_add is NULL, it
+ * is equivalent to calling \a grpc_channel_args_copy. */
 grpc_channel_args *grpc_channel_args_copy_and_add(const grpc_channel_args *src,
                                                   const grpc_arg *to_add,
                                                   size_t num_to_add);
 
-/** Copy args from a then args from b into a new channel args */
+/** Concatenate args from \a a and \a b into a new instance */
 grpc_channel_args *grpc_channel_args_merge(const grpc_channel_args *a,
                                            const grpc_channel_args *b);
 
-/** Destroy arguments created by grpc_channel_args_copy */
+/** Destroy arguments created by \a grpc_channel_args_copy */
 void grpc_channel_args_destroy(grpc_channel_args *a);
 
 /** Reads census_enabled settings from channel args. Returns 1 if census_enabled
diff --git a/src/core/lib/channel/channel_stack.c b/src/core/lib/channel/channel_stack.c
index 52283e35fa..e36066d863 100644
--- a/src/core/lib/channel/channel_stack.c
+++ b/src/core/lib/channel/channel_stack.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/channel_stack.h b/src/core/lib/channel/channel_stack.h
index b29bee411d..9e3a25a152 100644
--- a/src/core/lib/channel/channel_stack.h
+++ b/src/core/lib/channel/channel_stack.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/client_channel.c b/src/core/lib/channel/client_channel.c
index 9fdf803ecf..3f7cf1cf97 100644
--- a/src/core/lib/channel/client_channel.c
+++ b/src/core/lib/channel/client_channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/client_channel.h b/src/core/lib/channel/client_channel.h
index 8777796fb6..ac418c8c51 100644
--- a/src/core/lib/channel/client_channel.h
+++ b/src/core/lib/channel/client_channel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/compress_filter.c b/src/core/lib/channel/compress_filter.c
index 04bb7cc76f..229fdb5ef6 100644
--- a/src/core/lib/channel/compress_filter.c
+++ b/src/core/lib/channel/compress_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/compress_filter.h b/src/core/lib/channel/compress_filter.h
index 9010074335..0d973329c4 100644
--- a/src/core/lib/channel/compress_filter.h
+++ b/src/core/lib/channel/compress_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/connected_channel.c b/src/core/lib/channel/connected_channel.c
index 5e3a8974ce..c1debab4c6 100644
--- a/src/core/lib/channel/connected_channel.c
+++ b/src/core/lib/channel/connected_channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/connected_channel.h b/src/core/lib/channel/connected_channel.h
index 4f20b751cc..3142d647b7 100644
--- a/src/core/lib/channel/connected_channel.h
+++ b/src/core/lib/channel/connected_channel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/context.h b/src/core/lib/channel/context.h
index bca102da9a..c50e84279d 100644
--- a/src/core/lib/channel/context.h
+++ b/src/core/lib/channel/context.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c
index 7dbac38414..deba23e21f 100644
--- a/src/core/lib/channel/http_client_filter.c
+++ b/src/core/lib/channel/http_client_filter.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -112,7 +112,9 @@ static void hc_mutate_op(grpc_call_element *elem,
     /* Send : prefixed headers, which have to be before any application
        layer headers. */
     grpc_metadata_batch_add_head(op->send_initial_metadata, &calld->method,
-                                 GRPC_MDELEM_METHOD_POST);
+                                 op->send_idempotent_request
+                                     ? GRPC_MDELEM_METHOD_PUT
+                                     : GRPC_MDELEM_METHOD_POST);
     grpc_metadata_batch_add_head(op->send_initial_metadata, &calld->scheme,
                                  channeld->static_scheme);
     grpc_metadata_batch_add_tail(op->send_initial_metadata, &calld->te_trailers,
diff --git a/src/core/lib/channel/http_client_filter.h b/src/core/lib/channel/http_client_filter.h
index 418426e9cc..a884b36318 100644
--- a/src/core/lib/channel/http_client_filter.h
+++ b/src/core/lib/channel/http_client_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/http_server_filter.c b/src/core/lib/channel/http_server_filter.c
index df99b77ab3..c140c61b8f 100644
--- a/src/core/lib/channel/http_server_filter.c
+++ b/src/core/lib/channel/http_server_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,7 +41,7 @@
 
 typedef struct call_data {
   uint8_t seen_path;
-  uint8_t seen_post;
+  uint8_t seen_method;
   uint8_t sent_status;
   uint8_t seen_scheme;
   uint8_t seen_te_trailers;
@@ -50,6 +50,7 @@ typedef struct call_data {
   grpc_linked_mdelem content_type;
 
   grpc_metadata_batch *recv_initial_metadata;
+  bool *recv_idempotent_request;
   /** Closure to call when finished with the hs_on_recv hook */
   grpc_closure *on_done_recv;
   /** Receive closures are chained: we inject this closure as the on_done_recv
@@ -72,11 +73,16 @@ static grpc_mdelem *server_filter(void *user_data, grpc_mdelem *md) {
 
   /* Check if it is one of the headers we care about. */
   if (md == GRPC_MDELEM_TE_TRAILERS || md == GRPC_MDELEM_METHOD_POST ||
-      md == GRPC_MDELEM_SCHEME_HTTP || md == GRPC_MDELEM_SCHEME_HTTPS ||
+      md == GRPC_MDELEM_METHOD_PUT || md == GRPC_MDELEM_SCHEME_HTTP ||
+      md == GRPC_MDELEM_SCHEME_HTTPS ||
       md == GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC) {
     /* swallow it */
     if (md == GRPC_MDELEM_METHOD_POST) {
-      calld->seen_post = 1;
+      calld->seen_method = 1;
+      *calld->recv_idempotent_request = false;
+    } else if (md == GRPC_MDELEM_METHOD_PUT) {
+      calld->seen_method = 1;
+      *calld->recv_idempotent_request = true;
     } else if (md->key == GRPC_MDSTR_SCHEME) {
       calld->seen_scheme = 1;
     } else if (md == GRPC_MDELEM_TE_TRAILERS) {
@@ -142,7 +148,7 @@ static void hs_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
     /* Have we seen the required http2 transport headers?
        (:method, :scheme, content-type, with :path and :authority covered
        at the channel level right now) */
-    if (calld->seen_post && calld->seen_scheme && calld->seen_te_trailers &&
+    if (calld->seen_method && calld->seen_scheme && calld->seen_te_trailers &&
         calld->seen_path && calld->seen_authority) {
       /* do nothing */
     } else {
@@ -152,7 +158,7 @@ static void hs_on_recv(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
       if (!calld->seen_authority) {
         gpr_log(GPR_ERROR, "Missing :authority header");
       }
-      if (!calld->seen_post) {
+      if (!calld->seen_method) {
         gpr_log(GPR_ERROR, "Missing :method header");
       }
       if (!calld->seen_scheme) {
@@ -185,7 +191,9 @@ static void hs_mutate_op(grpc_call_element *elem,
 
   if (op->recv_initial_metadata) {
     /* substitute our callback for the higher callback */
+    GPR_ASSERT(op->recv_idempotent_request != NULL);
     calld->recv_initial_metadata = op->recv_initial_metadata;
+    calld->recv_idempotent_request = op->recv_idempotent_request;
     calld->on_done_recv = op->recv_initial_metadata_ready;
     op->recv_initial_metadata_ready = &calld->hs_on_recv;
   }
diff --git a/src/core/lib/channel/http_server_filter.h b/src/core/lib/channel/http_server_filter.h
index c8cf920ded..77ba2d263d 100644
--- a/src/core/lib/channel/http_server_filter.h
+++ b/src/core/lib/channel/http_server_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/subchannel_call_holder.c b/src/core/lib/channel/subchannel_call_holder.c
index 6c6d42dd73..22f3679bf5 100644
--- a/src/core/lib/channel/subchannel_call_holder.c
+++ b/src/core/lib/channel/subchannel_call_holder.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/channel/subchannel_call_holder.h b/src/core/lib/channel/subchannel_call_holder.h
index 882f366792..5cf291a266 100644
--- a/src/core/lib/channel/subchannel_call_holder.h
+++ b/src/core/lib/channel/subchannel_call_holder.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/client_config.c b/src/core/lib/client_config/client_config.c
index 82c8d68099..2521023364 100644
--- a/src/core/lib/client_config/client_config.c
+++ b/src/core/lib/client_config/client_config.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/client_config.h b/src/core/lib/client_config/client_config.h
index 404ec0d3a5..8dc2f6b299 100644
--- a/src/core/lib/client_config/client_config.h
+++ b/src/core/lib/client_config/client_config.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/connector.c b/src/core/lib/client_config/connector.c
index f51d862c6d..4c7b823dac 100644
--- a/src/core/lib/client_config/connector.c
+++ b/src/core/lib/client_config/connector.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/connector.h b/src/core/lib/client_config/connector.h
index 21b925aade..39870a261c 100644
--- a/src/core/lib/client_config/connector.h
+++ b/src/core/lib/client_config/connector.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/default_initial_connect_string.c b/src/core/lib/client_config/default_initial_connect_string.c
index 86eb37de77..a70da4a84a 100644
--- a/src/core/lib/client_config/default_initial_connect_string.c
+++ b/src/core/lib/client_config/default_initial_connect_string.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/initial_connect_string.c b/src/core/lib/client_config/initial_connect_string.c
index 95ae728316..4034ea2e87 100644
--- a/src/core/lib/client_config/initial_connect_string.c
+++ b/src/core/lib/client_config/initial_connect_string.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/initial_connect_string.h b/src/core/lib/client_config/initial_connect_string.h
index eec42fa240..51302768c6 100644
--- a/src/core/lib/client_config/initial_connect_string.h
+++ b/src/core/lib/client_config/initial_connect_string.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/lb_policy.c b/src/core/lib/client_config/lb_policy.c
index ee20ccd76a..3d23669ec2 100644
--- a/src/core/lib/client_config/lb_policy.c
+++ b/src/core/lib/client_config/lb_policy.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/lb_policy.h b/src/core/lib/client_config/lb_policy.h
index 58a0a04d85..a63e8e68df 100644
--- a/src/core/lib/client_config/lb_policy.h
+++ b/src/core/lib/client_config/lb_policy.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/lb_policy_factory.c b/src/core/lib/client_config/lb_policy_factory.c
index 2ca6f42f89..92e1f5f08b 100644
--- a/src/core/lib/client_config/lb_policy_factory.c
+++ b/src/core/lib/client_config/lb_policy_factory.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,7 +42,8 @@ void grpc_lb_policy_factory_unref(grpc_lb_policy_factory* factory) {
 }
 
 grpc_lb_policy* grpc_lb_policy_factory_create_lb_policy(
-    grpc_lb_policy_factory* factory, grpc_lb_policy_args* args) {
+    grpc_exec_ctx* exec_ctx, grpc_lb_policy_factory* factory,
+    grpc_lb_policy_args* args) {
   if (factory == NULL) return NULL;
-  return factory->vtable->create_lb_policy(factory, args);
+  return factory->vtable->create_lb_policy(exec_ctx, factory, args);
 }
diff --git a/src/core/lib/client_config/lb_policy_factory.h b/src/core/lib/client_config/lb_policy_factory.h
index 36eaf178d9..6f21912821 100644
--- a/src/core/lib/client_config/lb_policy_factory.h
+++ b/src/core/lib/client_config/lb_policy_factory.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,7 +35,10 @@
 #define GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICY_FACTORY_H
 
 #include "src/core/lib/client_config/lb_policy.h"
-#include "src/core/lib/client_config/subchannel.h"
+#include "src/core/lib/client_config/subchannel_factory.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+
+#include "src/core/lib/iomgr/exec_ctx.h"
 
 typedef struct grpc_lb_policy_factory grpc_lb_policy_factory;
 typedef struct grpc_lb_policy_factory_vtable grpc_lb_policy_factory_vtable;
@@ -47,8 +50,8 @@ struct grpc_lb_policy_factory {
 };
 
 typedef struct grpc_lb_policy_args {
-  grpc_subchannel **subchannels;
-  size_t num_subchannels;
+  grpc_resolved_addresses *addresses;
+  grpc_subchannel_factory *subchannel_factory;
 } grpc_lb_policy_args;
 
 struct grpc_lb_policy_factory_vtable {
@@ -56,7 +59,8 @@ struct grpc_lb_policy_factory_vtable {
   void (*unref)(grpc_lb_policy_factory *factory);
 
   /** Implementation of grpc_lb_policy_factory_create_lb_policy */
-  grpc_lb_policy *(*create_lb_policy)(grpc_lb_policy_factory *factory,
+  grpc_lb_policy *(*create_lb_policy)(grpc_exec_ctx *exec_ctx,
+                                      grpc_lb_policy_factory *factory,
                                       grpc_lb_policy_args *args);
 
   /** Name for the LB policy this factory implements */
@@ -68,6 +72,7 @@ void grpc_lb_policy_factory_unref(grpc_lb_policy_factory *factory);
 
 /** Create a lb_policy instance. */
 grpc_lb_policy *grpc_lb_policy_factory_create_lb_policy(
-    grpc_lb_policy_factory *factory, grpc_lb_policy_args *args);
+    grpc_exec_ctx *exec_ctx, grpc_lb_policy_factory *factory,
+    grpc_lb_policy_args *args);
 
 #endif /* GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICY_FACTORY_H */
diff --git a/src/core/lib/client_config/lb_policy_registry.c b/src/core/lib/client_config/lb_policy_registry.c
index 13acfe78cd..af396362a1 100644
--- a/src/core/lib/client_config/lb_policy_registry.c
+++ b/src/core/lib/client_config/lb_policy_registry.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -40,12 +40,7 @@
 static grpc_lb_policy_factory *g_all_of_the_lb_policies[MAX_POLICIES];
 static int g_number_of_lb_policies = 0;
 
-static grpc_lb_policy_factory *g_default_lb_policy_factory;
-
-void grpc_lb_policy_registry_init(grpc_lb_policy_factory *default_factory) {
-  g_number_of_lb_policies = 0;
-  g_default_lb_policy_factory = default_factory;
-}
+void grpc_lb_policy_registry_init(void) { g_number_of_lb_policies = 0; }
 
 void grpc_lb_policy_registry_shutdown(void) {
   int i;
@@ -79,10 +74,10 @@ static grpc_lb_policy_factory *lookup_factory(const char *name) {
   return NULL;
 }
 
-grpc_lb_policy *grpc_lb_policy_create(const char *name,
+grpc_lb_policy *grpc_lb_policy_create(grpc_exec_ctx *exec_ctx, const char *name,
                                       grpc_lb_policy_args *args) {
   grpc_lb_policy_factory *factory = lookup_factory(name);
   grpc_lb_policy *lb_policy =
-      grpc_lb_policy_factory_create_lb_policy(factory, args);
+      grpc_lb_policy_factory_create_lb_policy(exec_ctx, factory, args);
   return lb_policy;
 }
diff --git a/src/core/lib/client_config/lb_policy_registry.h b/src/core/lib/client_config/lb_policy_registry.h
index c251fd9f08..4b8495d8a1 100644
--- a/src/core/lib/client_config/lb_policy_registry.h
+++ b/src/core/lib/client_config/lb_policy_registry.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,10 +35,11 @@
 #define GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICY_REGISTRY_H
 
 #include "src/core/lib/client_config/lb_policy_factory.h"
+#include "src/core/lib/iomgr/exec_ctx.h"
 
 /** Initialize the registry and set \a default_factory as the factory to be
  * returned when no name is provided in a lookup */
-void grpc_lb_policy_registry_init(grpc_lb_policy_factory *default_factory);
+void grpc_lb_policy_registry_init(void);
 void grpc_lb_policy_registry_shutdown(void);
 
 /** Register a LB policy factory. */
@@ -48,7 +49,7 @@ void grpc_register_lb_policy(grpc_lb_policy_factory *factory);
  *
  * If \a name is NULL, the default factory from \a grpc_lb_policy_registry_init
  * will be returned. */
-grpc_lb_policy *grpc_lb_policy_create(const char *name,
+grpc_lb_policy *grpc_lb_policy_create(grpc_exec_ctx *exec_ctx, const char *name,
                                       grpc_lb_policy_args *args);
 
 #endif /* GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICY_REGISTRY_H */
diff --git a/src/core/lib/client_config/resolver.c b/src/core/lib/client_config/resolver.c
index 32f0643adb..b9eef5575f 100644
--- a/src/core/lib/client_config/resolver.c
+++ b/src/core/lib/client_config/resolver.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/resolver.h b/src/core/lib/client_config/resolver.h
index 1ee879293a..cf0bb2bc7a 100644
--- a/src/core/lib/client_config/resolver.h
+++ b/src/core/lib/client_config/resolver.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/resolver_factory.c b/src/core/lib/client_config/resolver_factory.c
index 0f76c664fa..001fa28536 100644
--- a/src/core/lib/client_config/resolver_factory.c
+++ b/src/core/lib/client_config/resolver_factory.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/resolver_factory.h b/src/core/lib/client_config/resolver_factory.h
index 7765c3c844..a5bca06475 100644
--- a/src/core/lib/client_config/resolver_factory.h
+++ b/src/core/lib/client_config/resolver_factory.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/resolver_registry.c b/src/core/lib/client_config/resolver_registry.c
index 29bd00c284..5f3db273b5 100644
--- a/src/core/lib/client_config/resolver_registry.c
+++ b/src/core/lib/client_config/resolver_registry.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -70,14 +70,11 @@ void grpc_register_resolver_type(grpc_resolver_factory *factory) {
   g_all_of_the_resolvers[g_number_of_resolvers++] = factory;
 }
 
-static grpc_resolver_factory *lookup_factory(grpc_uri *uri) {
+static grpc_resolver_factory *lookup_factory(const char *name) {
   int i;
 
-  /* handling NULL uri's here simplifies grpc_resolver_create */
-  if (!uri) return NULL;
-
   for (i = 0; i < g_number_of_resolvers; i++) {
-    if (0 == strcmp(uri->scheme, g_all_of_the_resolvers[i]->vtable->scheme)) {
+    if (0 == strcmp(name, g_all_of_the_resolvers[i]->vtable->scheme)) {
       return g_all_of_the_resolvers[i];
     }
   }
@@ -85,6 +82,17 @@ static grpc_resolver_factory *lookup_factory(grpc_uri *uri) {
   return NULL;
 }
 
+grpc_resolver_factory *grpc_resolver_factory_lookup(const char *name) {
+  grpc_resolver_factory *f = lookup_factory(name);
+  if (f) grpc_resolver_factory_ref(f);
+  return f;
+}
+
+static grpc_resolver_factory *lookup_factory_by_uri(grpc_uri *uri) {
+  if (!uri) return NULL;
+  return lookup_factory(uri->scheme);
+}
+
 static grpc_resolver_factory *resolve_factory(const char *target,
                                               grpc_uri **uri) {
   char *tmp;
@@ -92,13 +100,13 @@ static grpc_resolver_factory *resolve_factory(const char *target,
 
   GPR_ASSERT(uri != NULL);
   *uri = grpc_uri_parse(target, 1);
-  factory = lookup_factory(*uri);
+  factory = lookup_factory_by_uri(*uri);
   if (factory == NULL) {
     if (g_default_resolver_prefix != NULL) {
       grpc_uri_destroy(*uri);
       gpr_asprintf(&tmp, "%s%s", g_default_resolver_prefix, target);
       *uri = grpc_uri_parse(tmp, 1);
-      factory = lookup_factory(*uri);
+      factory = lookup_factory_by_uri(*uri);
       if (factory == NULL) {
         grpc_uri_destroy(grpc_uri_parse(target, 0));
         grpc_uri_destroy(grpc_uri_parse(tmp, 0));
diff --git a/src/core/lib/client_config/resolver_registry.h b/src/core/lib/client_config/resolver_registry.h
index 22289ca6bd..36c4f2fe03 100644
--- a/src/core/lib/client_config/resolver_registry.h
+++ b/src/core/lib/client_config/resolver_registry.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,6 +58,10 @@ void grpc_register_resolver_type(grpc_resolver_factory *factory);
 grpc_resolver *grpc_resolver_create(
     const char *target, grpc_subchannel_factory *subchannel_factory);
 
+/** Find a resolver factory given a name and return an (owned-by-the-caller)
+ *  reference to it */
+grpc_resolver_factory *grpc_resolver_factory_lookup(const char *name);
+
 /** Given a target, return a (freshly allocated with gpr_malloc) string
     representing the default authority to pass from a client. */
 char *grpc_get_default_authority(const char *target);
diff --git a/src/core/lib/client_config/resolvers/zookeeper_resolver.h b/src/core/lib/client_config/resolvers/zookeeper_resolver.h
deleted file mode 100644
index 7ee7604360..0000000000
--- a/src/core/lib/client_config/resolvers/zookeeper_resolver.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H
-#define GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H
-
-#include "src/core/lib/client_config/resolver_factory.h"
-
-/** Create a zookeeper resolver factory */
-grpc_resolver_factory *grpc_zookeeper_resolver_factory_create(void);
-
-#endif /* GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H */
diff --git a/src/core/lib/client_config/subchannel.c b/src/core/lib/client_config/subchannel.c
index 41242f0dd7..47c53a16ba 100644
--- a/src/core/lib/client_config/subchannel.c
+++ b/src/core/lib/client_config/subchannel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/subchannel.h b/src/core/lib/client_config/subchannel.h
index b4f545be52..68aeff39a1 100644
--- a/src/core/lib/client_config/subchannel.h
+++ b/src/core/lib/client_config/subchannel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/subchannel_factory.c b/src/core/lib/client_config/subchannel_factory.c
index 727a48a6c8..541368ec96 100644
--- a/src/core/lib/client_config/subchannel_factory.c
+++ b/src/core/lib/client_config/subchannel_factory.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/subchannel_factory.h b/src/core/lib/client_config/subchannel_factory.h
index 3ba2f860fe..96d68a2079 100644
--- a/src/core/lib/client_config/subchannel_factory.h
+++ b/src/core/lib/client_config/subchannel_factory.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/uri_parser.c b/src/core/lib/client_config/uri_parser.c
index d3228dec5f..6bec70da2d 100644
--- a/src/core/lib/client_config/uri_parser.c
+++ b/src/core/lib/client_config/uri_parser.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,8 +38,12 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/lib/support/string.h"
+
 /** a size_t default value... maps to all 1's */
 #define NOT_SET (~(size_t)0)
 
@@ -133,6 +137,51 @@ static int parse_fragment_or_query(const char *uri_text, size_t *i) {
   return 1;
 }
 
+static void do_nothing(void *ignored) {}
+static void parse_query_parts(grpc_uri *uri) {
+  static const char *QUERY_PARTS_SEPARATOR = "&";
+  static const char *QUERY_PARTS_VALUE_SEPARATOR = "=";
+  GPR_ASSERT(uri->query != NULL);
+  if (uri->query[0] == '\0') {
+    uri->query_parts = NULL;
+    uri->query_parts_values = NULL;
+    uri->num_query_parts = 0;
+    return;
+  }
+  gpr_slice query_slice =
+      gpr_slice_new(uri->query, strlen(uri->query), do_nothing);
+  gpr_slice_buffer query_parts; /* the &-separated elements of the query */
+  gpr_slice_buffer query_param_parts; /* the =-separated subelements */
+
+  gpr_slice_buffer_init(&query_parts);
+  gpr_slice_buffer_init(&query_param_parts);
+
+  gpr_slice_split(query_slice, QUERY_PARTS_SEPARATOR, &query_parts);
+  uri->query_parts = gpr_malloc(query_parts.count * sizeof(char *));
+  uri->query_parts_values = gpr_malloc(query_parts.count * sizeof(char *));
+  uri->num_query_parts = query_parts.count;
+  for (size_t i = 0; i < query_parts.count; i++) {
+    gpr_slice_split(query_parts.slices[i], QUERY_PARTS_VALUE_SEPARATOR,
+                    &query_param_parts);
+    GPR_ASSERT(query_param_parts.count > 0);
+    uri->query_parts[i] =
+        gpr_dump_slice(query_param_parts.slices[0], GPR_DUMP_ASCII);
+    if (query_param_parts.count > 1) {
+      /* TODO(dgq): only the first value after the separator is considered.
+       * Perhaps all chars after the first separator for the query part should
+       * be included, even if they include the separator. */
+      uri->query_parts_values[i] =
+          gpr_dump_slice(query_param_parts.slices[1], GPR_DUMP_ASCII);
+    } else {
+      uri->query_parts_values[i] = NULL;
+    }
+    gpr_slice_buffer_reset_and_unref(&query_param_parts);
+  }
+  gpr_slice_buffer_destroy(&query_parts);
+  gpr_slice_buffer_destroy(&query_param_parts);
+  gpr_slice_unref(query_slice);
+}
+
 grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors) {
   grpc_uri *uri;
   size_t scheme_begin = 0;
@@ -227,16 +276,35 @@ grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors) {
   uri->path = copy_component(uri_text, path_begin, path_end);
   uri->query = copy_component(uri_text, query_begin, query_end);
   uri->fragment = copy_component(uri_text, fragment_begin, fragment_end);
+  parse_query_parts(uri);
 
   return uri;
 }
 
+const char *grpc_uri_get_query_arg(const grpc_uri *uri, const char *key) {
+  GPR_ASSERT(key != NULL);
+  if (key[0] == '\0') return NULL;
+
+  for (size_t i = 0; i < uri->num_query_parts; ++i) {
+    if (0 == strcmp(key, uri->query_parts[i])) {
+      return uri->query_parts_values[i];
+    }
+  }
+  return NULL;
+}
+
 void grpc_uri_destroy(grpc_uri *uri) {
   if (!uri) return;
   gpr_free(uri->scheme);
   gpr_free(uri->authority);
   gpr_free(uri->path);
   gpr_free(uri->query);
+  for (size_t i = 0; i < uri->num_query_parts; ++i) {
+    gpr_free(uri->query_parts[i]);
+    gpr_free(uri->query_parts_values[i]);
+  }
+  gpr_free(uri->query_parts);
+  gpr_free(uri->query_parts_values);
   gpr_free(uri->fragment);
   gpr_free(uri);
 }
diff --git a/src/core/lib/client_config/uri_parser.h b/src/core/lib/client_config/uri_parser.h
index d70d451e60..5d6785d293 100644
--- a/src/core/lib/client_config/uri_parser.h
+++ b/src/core/lib/client_config/uri_parser.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,17 +34,29 @@
 #ifndef GRPC_CORE_LIB_CLIENT_CONFIG_URI_PARSER_H
 #define GRPC_CORE_LIB_CLIENT_CONFIG_URI_PARSER_H
 
+#include <stddef.h>
+
 typedef struct {
   char *scheme;
   char *authority;
   char *path;
   char *query;
+  /** Query substrings separated by '&' */
+  char **query_parts;
+  /** Number of elements in \a query_parts and \a query_parts_values */
+  size_t num_query_parts;
+  /** Split each query part by '='. NULL if not present. */
+  char **query_parts_values;
   char *fragment;
 } grpc_uri;
 
 /** parse a uri, return NULL on failure */
 grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors);
 
+/** return the part of a query string after the '=' in "?key=xxx&...", or NULL
+ * if key is not present */
+const char *grpc_uri_get_query_arg(const grpc_uri *uri, const char *key);
+
 /** destroy a uri */
 void grpc_uri_destroy(grpc_uri *uri);
 
diff --git a/src/core/lib/compression/algorithm_metadata.h b/src/core/lib/compression/algorithm_metadata.h
index 47f33abdc7..1f9cc15f23 100644
--- a/src/core/lib/compression/algorithm_metadata.h
+++ b/src/core/lib/compression/algorithm_metadata.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/compression/compression_algorithm.c b/src/core/lib/compression/compression_algorithm.c
index f781b45042..7039364b7b 100644
--- a/src/core/lib/compression/compression_algorithm.c
+++ b/src/core/lib/compression/compression_algorithm.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/compression/message_compress.c b/src/core/lib/compression/message_compress.c
index b4b6a2d75e..cbe0b5a285 100644
--- a/src/core/lib/compression/message_compress.c
+++ b/src/core/lib/compression/message_compress.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/compression/message_compress.h b/src/core/lib/compression/message_compress.h
index b71608139e..c69eaaf006 100644
--- a/src/core/lib/compression/message_compress.h
+++ b/src/core/lib/compression/message_compress.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/debug/trace.c b/src/core/lib/debug/trace.c
index 786dd9324f..555f497b78 100644
--- a/src/core/lib/debug/trace.c
+++ b/src/core/lib/debug/trace.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/debug/trace.h b/src/core/lib/debug/trace.h
index 76ea5a7c64..7afc38db7e 100644
--- a/src/core/lib/debug/trace.h
+++ b/src/core/lib/debug/trace.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/http/format_request.c b/src/core/lib/http/format_request.c
index 95b3918646..9240356fea 100644
--- a/src/core/lib/http/format_request.c
+++ b/src/core/lib/http/format_request.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/http/format_request.h b/src/core/lib/http/format_request.h
index 2e933d804b..1543efe4b0 100644
--- a/src/core/lib/http/format_request.h
+++ b/src/core/lib/http/format_request.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/http/httpcli.c b/src/core/lib/http/httpcli.c
index aab28ad8b6..76bd1b64dc 100644
--- a/src/core/lib/http/httpcli.c
+++ b/src/core/lib/http/httpcli.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/http/httpcli.h b/src/core/lib/http/httpcli.h
index b8d54a8586..11a32a125c 100644
--- a/src/core/lib/http/httpcli.h
+++ b/src/core/lib/http/httpcli.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/http/httpcli_security_connector.c b/src/core/lib/http/httpcli_security_connector.c
index 6f1630ac1f..ea4bff30d4 100644
--- a/src/core/lib/http/httpcli_security_connector.c
+++ b/src/core/lib/http/httpcli_security_connector.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/http/parser.c b/src/core/lib/http/parser.c
index 5d4e304615..01d17fb623 100644
--- a/src/core/lib/http/parser.c
+++ b/src/core/lib/http/parser.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,6 +39,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
+extern int grpc_http_trace;
+
 static char *buf2str(void *buffer, size_t length) {
   char *out = gpr_malloc(length + 1);
   memcpy(out, buffer, length);
@@ -72,7 +74,7 @@ static int handle_response_line(grpc_http_parser *parser) {
   return 1;
 
 error:
-  gpr_log(GPR_ERROR, "Failed parsing response line");
+  if (grpc_http_trace) gpr_log(GPR_ERROR, "Failed parsing response line");
   return 0;
 }
 
@@ -125,7 +127,7 @@ static int handle_request_line(grpc_http_parser *parser) {
   return 1;
 
 error:
-  gpr_log(GPR_ERROR, "Failed parsing request line");
+  if (grpc_http_trace) gpr_log(GPR_ERROR, "Failed parsing request line");
   return 0;
 }
 
@@ -150,7 +152,8 @@ static int add_header(grpc_http_parser *parser) {
   GPR_ASSERT(cur != end);
 
   if (*cur == ' ' || *cur == '\t') {
-    gpr_log(GPR_ERROR, "Continued header lines not supported yet");
+    if (grpc_http_trace)
+      gpr_log(GPR_ERROR, "Continued header lines not supported yet");
     goto error;
   }
 
@@ -158,7 +161,7 @@ static int add_header(grpc_http_parser *parser) {
     cur++;
   }
   if (cur == end) {
-    gpr_log(GPR_ERROR, "Didn't find ':' in header string");
+    if (grpc_http_trace) gpr_log(GPR_ERROR, "Didn't find ':' in header string");
     goto error;
   }
   GPR_ASSERT(cur >= beg);
@@ -249,8 +252,9 @@ static int addbyte(grpc_http_parser *parser, uint8_t byte) {
     case GRPC_HTTP_FIRST_LINE:
     case GRPC_HTTP_HEADERS:
       if (parser->cur_line_length >= GRPC_HTTP_PARSER_MAX_HEADER_LENGTH) {
-        gpr_log(GPR_ERROR, "HTTP client max line length (%d) exceeded",
-                GRPC_HTTP_PARSER_MAX_HEADER_LENGTH);
+        if (grpc_http_trace)
+          gpr_log(GPR_ERROR, "HTTP client max line length (%d) exceeded",
+                  GRPC_HTTP_PARSER_MAX_HEADER_LENGTH);
         return 0;
       }
       parser->cur_line[parser->cur_line_length] = byte;
diff --git a/src/core/lib/http/parser.h b/src/core/lib/http/parser.h
index 6a72174aa6..8bd73f649a 100644
--- a/src/core/lib/http/parser.h
+++ b/src/core/lib/http/parser.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/closure.c b/src/core/lib/iomgr/closure.c
index 724ebc284a..d6f073fc9d 100644
--- a/src/core/lib/iomgr/closure.c
+++ b/src/core/lib/iomgr/closure.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/closure.h b/src/core/lib/iomgr/closure.h
index 2597cf1706..8652b53a8b 100644
--- a/src/core/lib/iomgr/closure.h
+++ b/src/core/lib/iomgr/closure.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/endpoint.c b/src/core/lib/iomgr/endpoint.c
index 576b5a6e5c..1ab3733d38 100644
--- a/src/core/lib/iomgr/endpoint.c
+++ b/src/core/lib/iomgr/endpoint.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/endpoint.h b/src/core/lib/iomgr/endpoint.h
index 918e705fbd..3877ceb1e2 100644
--- a/src/core/lib/iomgr/endpoint.h
+++ b/src/core/lib/iomgr/endpoint.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/endpoint_pair.h b/src/core/lib/iomgr/endpoint_pair.h
index bef8bb3518..5cd78051bd 100644
--- a/src/core/lib/iomgr/endpoint_pair.h
+++ b/src/core/lib/iomgr/endpoint_pair.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/endpoint_pair_windows.c b/src/core/lib/iomgr/endpoint_pair_windows.c
index cba18db81f..582704e267 100644
--- a/src/core/lib/iomgr/endpoint_pair_windows.c
+++ b/src/core/lib/iomgr/endpoint_pair_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/ev_poll_and_epoll_posix.c b/src/core/lib/iomgr/ev_poll_and_epoll_posix.c
new file mode 100644
index 0000000000..dba335490b
--- /dev/null
+++ b/src/core/lib/iomgr/ev_poll_and_epoll_posix.c
@@ -0,0 +1,1936 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* This file will be removed shortly: it's here to keep refactoring
+ * steps simple and auditable.
+ * It's the combination of the old files:
+ *  - fd_posix.{h,c}
+ *  - pollset_posix.{h,c}
+ *  - pullset_multipoller_with_{poll,epoll}.{h,c}
+ * The new version will be split into:
+ *  - ev_poll_posix.{h,c}
+ *  - ev_epoll_posix.{h,c}
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/ev_poll_and_epoll_posix.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/tls.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+/*******************************************************************************
+ * FD declarations
+ */
+
+typedef struct grpc_fd_watcher {
+  struct grpc_fd_watcher *next;
+  struct grpc_fd_watcher *prev;
+  grpc_pollset *pollset;
+  grpc_pollset_worker *worker;
+  grpc_fd *fd;
+} grpc_fd_watcher;
+
+struct grpc_fd {
+  int fd;
+  /* refst format:
+     bit0:   1=active/0=orphaned
+     bit1-n: refcount
+     meaning that mostly we ref by two to avoid altering the orphaned bit,
+     and just unref by 1 when we're ready to flag the object as orphaned */
+  gpr_atm refst;
+
+  gpr_mu mu;
+  int shutdown;
+  int closed;
+  int released;
+
+  /* The watcher list.
+
+     The following watcher related fields are protected by watcher_mu.
+
+     An fd_watcher is an ephemeral object created when an fd wants to
+     begin polling, and destroyed after the poll.
+
+     It denotes the fd's interest in whether to read poll or write poll
+     or both or neither on this fd.
+
+     If a watcher is asked to poll for reads or writes, the read_watcher
+     or write_watcher fields are set respectively. A watcher may be asked
+     to poll for both, in which case both fields will be set.
+
+     read_watcher and write_watcher may be NULL if no watcher has been
+     asked to poll for reads or writes.
+
+     If an fd_watcher is not asked to poll for reads or writes, it's added
+     to a linked list of inactive watchers, rooted at inactive_watcher_root.
+     If at a later time there becomes need of a poller to poll, one of
+     the inactive pollers may be kicked out of their poll loops to take
+     that responsibility. */
+  grpc_fd_watcher inactive_watcher_root;
+  grpc_fd_watcher *read_watcher;
+  grpc_fd_watcher *write_watcher;
+
+  grpc_closure *read_closure;
+  grpc_closure *write_closure;
+
+  struct grpc_fd *freelist_next;
+
+  grpc_closure *on_done_closure;
+
+  grpc_iomgr_object iomgr_object;
+};
+
+/* Begin polling on an fd.
+   Registers that the given pollset is interested in this fd - so that if read
+   or writability interest changes, the pollset can be kicked to pick up that
+   new interest.
+   Return value is:
+     (fd_needs_read? read_mask : 0) | (fd_needs_write? write_mask : 0)
+   i.e. a combination of read_mask and write_mask determined by the fd's current
+   interest in said events.
+   Polling strategies that do not need to alter their behavior depending on the
+   fd's current interest (such as epoll) do not need to call this function.
+   MUST NOT be called with a pollset lock taken */
+static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
+                              grpc_pollset_worker *worker, uint32_t read_mask,
+                              uint32_t write_mask, grpc_fd_watcher *rec);
+/* Complete polling previously started with fd_begin_poll
+   MUST NOT be called with a pollset lock taken
+   if got_read or got_write are 1, also does the become_{readable,writable} as
+   appropriate. */
+static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
+                        int got_read, int got_write);
+
+/* Return 1 if this fd is orphaned, 0 otherwise */
+static bool fd_is_orphaned(grpc_fd *fd);
+
+/* Reference counting for fds */
+/*#define GRPC_FD_REF_COUNT_DEBUG*/
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line);
+#define GRPC_FD_REF(fd, reason) fd_ref(fd, reason, __FILE__, __LINE__)
+#define GRPC_FD_UNREF(fd, reason) fd_unref(fd, reason, __FILE__, __LINE__)
+#else
+static void fd_ref(grpc_fd *fd);
+static void fd_unref(grpc_fd *fd);
+#define GRPC_FD_REF(fd, reason) fd_ref(fd)
+#define GRPC_FD_UNREF(fd, reason) fd_unref(fd)
+#endif
+
+static void fd_global_init(void);
+static void fd_global_shutdown(void);
+
+#define CLOSURE_NOT_READY ((grpc_closure *)0)
+#define CLOSURE_READY ((grpc_closure *)1)
+
+/*******************************************************************************
+ * pollset declarations
+ */
+
+typedef struct grpc_pollset_vtable grpc_pollset_vtable;
+
+typedef struct grpc_cached_wakeup_fd {
+  grpc_wakeup_fd fd;
+  struct grpc_cached_wakeup_fd *next;
+} grpc_cached_wakeup_fd;
+
+struct grpc_pollset_worker {
+  grpc_cached_wakeup_fd *wakeup_fd;
+  int reevaluate_polling_on_wakeup;
+  int kicked_specifically;
+  struct grpc_pollset_worker *next;
+  struct grpc_pollset_worker *prev;
+};
+
+struct grpc_pollset {
+  /* pollsets under posix can mutate representation as fds are added and
+     removed.
+     For example, we may choose a poll() based implementation on linux for
+     few fds, and an epoll() based implementation for many fds */
+  const grpc_pollset_vtable *vtable;
+  gpr_mu mu;
+  grpc_pollset_worker root_worker;
+  int in_flight_cbs;
+  int shutting_down;
+  int called_shutdown;
+  int kicked_without_pollers;
+  grpc_closure *shutdown_done;
+  grpc_closure_list idle_jobs;
+  union {
+    int fd;
+    void *ptr;
+  } data;
+  /* Local cache of eventfds for workers */
+  grpc_cached_wakeup_fd *local_wakeup_cache;
+};
+
+struct grpc_pollset_vtable {
+  void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                 struct grpc_fd *fd, int and_unlock_pollset);
+  void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                                grpc_pollset_worker *worker,
+                                gpr_timespec deadline, gpr_timespec now);
+  void (*finish_shutdown)(grpc_pollset *pollset);
+  void (*destroy)(grpc_pollset *pollset);
+};
+
+/* Add an fd to a pollset */
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           struct grpc_fd *fd);
+
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd);
+
+/* Convert a timespec to milliseconds:
+   - very small or negative poll times are clamped to zero to do a
+     non-blocking poll (which becomes spin polling)
+   - other small values are rounded up to one millisecond
+   - longer than a millisecond polls are rounded up to the next nearest
+     millisecond to avoid spinning
+   - infinite timeouts are converted to -1 */
+static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
+                                           gpr_timespec now);
+
+/* Allow kick to wakeup the currently polling worker */
+#define GRPC_POLLSET_CAN_KICK_SELF 1
+/* Force the wakee to repoll when awoken */
+#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
+/* As per pollset_kick, with an extended set of flags (defined above)
+   -- mostly for fd_posix's use. */
+static void pollset_kick_ext(grpc_pollset *p,
+                             grpc_pollset_worker *specific_worker,
+                             uint32_t flags);
+
+/* turn a pollset into a multipoller: platform specific */
+typedef void (*platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
+                                                 grpc_pollset *pollset,
+                                                 struct grpc_fd **fds,
+                                                 size_t fd_count);
+static platform_become_multipoller_type platform_become_multipoller;
+
+/* Return 1 if the pollset has active threads in pollset_work (pollset must
+ * be locked) */
+static int pollset_has_workers(grpc_pollset *pollset);
+
+static void remove_fd_from_all_epoll_sets(int fd);
+
+/*******************************************************************************
+ * pollset_set definitions
+ */
+
+struct grpc_pollset_set {
+  gpr_mu mu;
+
+  size_t pollset_count;
+  size_t pollset_capacity;
+  grpc_pollset **pollsets;
+
+  size_t pollset_set_count;
+  size_t pollset_set_capacity;
+  struct grpc_pollset_set **pollset_sets;
+
+  size_t fd_count;
+  size_t fd_capacity;
+  grpc_fd **fds;
+};
+
+/*******************************************************************************
+ * fd_posix.c
+ */
+
+/* We need to keep a freelist not because of any concerns of malloc performance
+ * but instead so that implementations with multiple threads in (for example)
+ * epoll_wait deal with the race between pollset removal and incoming poll
+ * notifications.
+ *
+ * The problem is that the poller ultimately holds a reference to this
+ * object, so it is very difficult to know when is safe to free it, at least
+ * without some expensive synchronization.
+ *
+ * If we keep the object freelisted, in the worst case losing this race just
+ * becomes a spurious read notification on a reused fd.
+ */
+/* TODO(klempner): We could use some form of polling generation count to know
+ * when these are safe to free. */
+/* TODO(klempner): Consider disabling freelisting if we don't have multiple
+ * threads in poll on the same fd */
+/* TODO(klempner): Batch these allocations to reduce fragmentation */
+static grpc_fd *fd_freelist = NULL;
+static gpr_mu fd_freelist_mu;
+
+static void freelist_fd(grpc_fd *fd) {
+  gpr_mu_lock(&fd_freelist_mu);
+  fd->freelist_next = fd_freelist;
+  fd_freelist = fd;
+  grpc_iomgr_unregister_object(&fd->iomgr_object);
+  gpr_mu_unlock(&fd_freelist_mu);
+}
+
+static grpc_fd *alloc_fd(int fd) {
+  grpc_fd *r = NULL;
+  gpr_mu_lock(&fd_freelist_mu);
+  if (fd_freelist != NULL) {
+    r = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+  }
+  gpr_mu_unlock(&fd_freelist_mu);
+  if (r == NULL) {
+    r = gpr_malloc(sizeof(grpc_fd));
+    gpr_mu_init(&r->mu);
+  }
+
+  gpr_mu_lock(&r->mu);
+  gpr_atm_rel_store(&r->refst, 1);
+  r->shutdown = 0;
+  r->read_closure = CLOSURE_NOT_READY;
+  r->write_closure = CLOSURE_NOT_READY;
+  r->fd = fd;
+  r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
+      &r->inactive_watcher_root;
+  r->freelist_next = NULL;
+  r->read_watcher = r->write_watcher = NULL;
+  r->on_done_closure = NULL;
+  r->closed = 0;
+  r->released = 0;
+  gpr_mu_unlock(&r->mu);
+  return r;
+}
+
+static void destroy(grpc_fd *fd) {
+  gpr_mu_destroy(&fd->mu);
+  gpr_free(fd);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
+static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+                   int line) {
+  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+          gpr_atm_no_barrier_load(&fd->refst),
+          gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
+#else
+#define REF_BY(fd, n, reason) ref_by(fd, n)
+#define UNREF_BY(fd, n, reason) unref_by(fd, n)
+static void ref_by(grpc_fd *fd, int n) {
+#endif
+  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
+}
+
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
+                     int line) {
+  gpr_atm old;
+  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
+          gpr_atm_no_barrier_load(&fd->refst),
+          gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
+#else
+static void unref_by(grpc_fd *fd, int n) {
+  gpr_atm old;
+#endif
+  old = gpr_atm_full_fetch_add(&fd->refst, -n);
+  if (old == n) {
+    freelist_fd(fd);
+  } else {
+    GPR_ASSERT(old > n);
+  }
+}
+
+static void fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
+
+static void fd_global_shutdown(void) {
+  gpr_mu_lock(&fd_freelist_mu);
+  gpr_mu_unlock(&fd_freelist_mu);
+  while (fd_freelist != NULL) {
+    grpc_fd *fd = fd_freelist;
+    fd_freelist = fd_freelist->freelist_next;
+    destroy(fd);
+  }
+  gpr_mu_destroy(&fd_freelist_mu);
+}
+
+static grpc_fd *fd_create(int fd, const char *name) {
+  grpc_fd *r = alloc_fd(fd);
+  char *name2;
+  gpr_asprintf(&name2, "%s fd=%d", name, fd);
+  grpc_iomgr_register_object(&r->iomgr_object, name2);
+  gpr_free(name2);
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
+#endif
+  return r;
+}
+
+static bool fd_is_orphaned(grpc_fd *fd) {
+  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
+}
+
+static void pollset_kick_locked(grpc_fd_watcher *watcher) {
+  gpr_mu_lock(&watcher->pollset->mu);
+  GPR_ASSERT(watcher->worker);
+  pollset_kick_ext(watcher->pollset, watcher->worker,
+                   GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+  gpr_mu_unlock(&watcher->pollset->mu);
+}
+
+static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
+  if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
+    pollset_kick_locked(fd->inactive_watcher_root.next);
+  } else if (fd->read_watcher) {
+    pollset_kick_locked(fd->read_watcher);
+  } else if (fd->write_watcher) {
+    pollset_kick_locked(fd->write_watcher);
+  }
+}
+
+static void wake_all_watchers_locked(grpc_fd *fd) {
+  grpc_fd_watcher *watcher;
+  for (watcher = fd->inactive_watcher_root.next;
+       watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
+    pollset_kick_locked(watcher);
+  }
+  if (fd->read_watcher) {
+    pollset_kick_locked(fd->read_watcher);
+  }
+  if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
+    pollset_kick_locked(fd->write_watcher);
+  }
+}
+
+static int has_watchers(grpc_fd *fd) {
+  return fd->read_watcher != NULL || fd->write_watcher != NULL ||
+         fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
+}
+
+static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  fd->closed = 1;
+  if (!fd->released) {
+    close(fd->fd);
+  } else {
+    remove_fd_from_all_epoll_sets(fd->fd);
+  }
+  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
+}
+
+static int fd_wrapped_fd(grpc_fd *fd) {
+  if (fd->released || fd->closed) {
+    return -1;
+  } else {
+    return fd->fd;
+  }
+}
+
+static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                      grpc_closure *on_done, int *release_fd,
+                      const char *reason) {
+  fd->on_done_closure = on_done;
+  fd->released = release_fd != NULL;
+  if (!fd->released) {
+    shutdown(fd->fd, SHUT_RDWR);
+  } else {
+    *release_fd = fd->fd;
+  }
+  gpr_mu_lock(&fd->mu);
+  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
+  if (!has_watchers(fd)) {
+    close_fd_locked(exec_ctx, fd);
+  } else {
+    wake_all_watchers_locked(fd);
+  }
+  gpr_mu_unlock(&fd->mu);
+  UNREF_BY(fd, 2, reason); /* drop the reference */
+}
+
+/* increment refcount by two to avoid changing the orphan bit */
+#ifdef GRPC_FD_REF_COUNT_DEBUG
+static void fd_ref(grpc_fd *fd, const char *reason, const char *file,
+                   int line) {
+  ref_by(fd, 2, reason, file, line);
+}
+
+static void fd_unref(grpc_fd *fd, const char *reason, const char *file,
+                     int line) {
+  unref_by(fd, 2, reason, file, line);
+}
+#else
+static void fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
+
+static void fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
+#endif
+
+static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure **st, grpc_closure *closure) {
+  if (*st == CLOSURE_NOT_READY) {
+    /* not ready ==> switch to a waiting state by setting the closure */
+    *st = closure;
+  } else if (*st == CLOSURE_READY) {
+    /* already ready ==> queue the closure to run immediately */
+    *st = CLOSURE_NOT_READY;
+    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
+    maybe_wake_one_watcher_locked(fd);
+  } else {
+    /* upcallptr was set to a different closure.  This is an error! */
+    gpr_log(GPR_ERROR,
+            "User called a notify_on function with a previous callback still "
+            "pending");
+    abort();
+  }
+}
+
+/* returns 1 if state becomes not ready */
+static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure **st) {
+  if (*st == CLOSURE_READY) {
+    /* duplicate ready ==> ignore */
+    return 0;
+  } else if (*st == CLOSURE_NOT_READY) {
+    /* not ready, and not waiting ==> flag ready */
+    *st = CLOSURE_READY;
+    return 0;
+  } else {
+    /* waiting ==> queue closure */
+    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
+    *st = CLOSURE_NOT_READY;
+    return 1;
+  }
+}
+
+static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  gpr_mu_lock(&fd->mu);
+  GPR_ASSERT(!fd->shutdown);
+  fd->shutdown = 1;
+  set_ready_locked(exec_ctx, fd, &fd->read_closure);
+  set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                              grpc_closure *closure) {
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                               grpc_closure *closure) {
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static uint32_t fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
+                              grpc_pollset_worker *worker, uint32_t read_mask,
+                              uint32_t write_mask, grpc_fd_watcher *watcher) {
+  uint32_t mask = 0;
+  grpc_closure *cur;
+  int requested;
+  /* keep track of pollers that have requested our events, in case they change
+   */
+  GRPC_FD_REF(fd, "poll");
+
+  gpr_mu_lock(&fd->mu);
+
+  /* if we are shutdown, then don't add to the watcher set */
+  if (fd->shutdown) {
+    watcher->fd = NULL;
+    watcher->pollset = NULL;
+    watcher->worker = NULL;
+    gpr_mu_unlock(&fd->mu);
+    GRPC_FD_UNREF(fd, "poll");
+    return 0;
+  }
+
+  /* if there is nobody polling for read, but we need to, then start doing so */
+  cur = fd->read_closure;
+  requested = cur != CLOSURE_READY;
+  if (read_mask && fd->read_watcher == NULL && requested) {
+    fd->read_watcher = watcher;
+    mask |= read_mask;
+  }
+  /* if there is nobody polling for write, but we need to, then start doing so
+   */
+  cur = fd->write_closure;
+  requested = cur != CLOSURE_READY;
+  if (write_mask && fd->write_watcher == NULL && requested) {
+    fd->write_watcher = watcher;
+    mask |= write_mask;
+  }
+  /* if not polling, remember this watcher in case we need someone to later */
+  if (mask == 0 && worker != NULL) {
+    watcher->next = &fd->inactive_watcher_root;
+    watcher->prev = watcher->next->prev;
+    watcher->next->prev = watcher->prev->next = watcher;
+  }
+  watcher->pollset = pollset;
+  watcher->worker = worker;
+  watcher->fd = fd;
+  gpr_mu_unlock(&fd->mu);
+
+  return mask;
+}
+
+static void fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
+                        int got_read, int got_write) {
+  int was_polling = 0;
+  int kick = 0;
+  grpc_fd *fd = watcher->fd;
+
+  if (fd == NULL) {
+    return;
+  }
+
+  gpr_mu_lock(&fd->mu);
+
+  if (watcher == fd->read_watcher) {
+    /* remove read watcher, kick if we still need a read */
+    was_polling = 1;
+    if (!got_read) {
+      kick = 1;
+    }
+    fd->read_watcher = NULL;
+  }
+  if (watcher == fd->write_watcher) {
+    /* remove write watcher, kick if we still need a write */
+    was_polling = 1;
+    if (!got_write) {
+      kick = 1;
+    }
+    fd->write_watcher = NULL;
+  }
+  if (!was_polling && watcher->worker != NULL) {
+    /* remove from inactive list */
+    watcher->next->prev = watcher->prev;
+    watcher->prev->next = watcher->next;
+  }
+  if (got_read) {
+    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
+      kick = 1;
+    }
+  }
+  if (got_write) {
+    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
+      kick = 1;
+    }
+  }
+  if (kick) {
+    maybe_wake_one_watcher_locked(fd);
+  }
+  if (fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
+    close_fd_locked(exec_ctx, fd);
+  }
+  gpr_mu_unlock(&fd->mu);
+
+  GRPC_FD_UNREF(fd, "poll");
+}
+
+/*******************************************************************************
+ * pollset_posix.c
+ */
+
+GPR_TLS_DECL(g_current_thread_poller);
+GPR_TLS_DECL(g_current_thread_worker);
+
+/** The alarm system needs to be able to wakeup 'some poller' sometimes
+ *  (specifically when a new alarm needs to be triggered earlier than the next
+ *  alarm 'epoch').
+ *  This wakeup_fd gives us something to alert on when such a case occurs. */
+grpc_wakeup_fd grpc_global_wakeup_fd;
+
+static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev->next = worker->next;
+  worker->next->prev = worker->prev;
+}
+
+static int pollset_has_workers(grpc_pollset *p) {
+  return p->root_worker.next != &p->root_worker;
+}
+
+static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
+  if (pollset_has_workers(p)) {
+    grpc_pollset_worker *w = p->root_worker.next;
+    remove_worker(p, w);
+    return w;
+  } else {
+    return NULL;
+  }
+}
+
+static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->next = &p->root_worker;
+  worker->prev = worker->next->prev;
+  worker->prev->next = worker->next->prev = worker;
+}
+
+static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
+  worker->prev = &p->root_worker;
+  worker->next = worker->prev->next;
+  worker->prev->next = worker->next->prev = worker;
+}
+
+static void pollset_kick_ext(grpc_pollset *p,
+                             grpc_pollset_worker *specific_worker,
+                             uint32_t flags) {
+  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
+
+  /* pollset->mu already held */
+  if (specific_worker != NULL) {
+    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
+      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
+      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+      for (specific_worker = p->root_worker.next;
+           specific_worker != &p->root_worker;
+           specific_worker = specific_worker->next) {
+        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      }
+      p->kicked_without_pollers = 1;
+      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
+    } else if (gpr_tls_get(&g_current_thread_worker) !=
+               (intptr_t)specific_worker) {
+      GPR_TIMER_MARK("different_thread_worker", 0);
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      specific_worker->kicked_specifically = 1;
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
+      GPR_TIMER_MARK("kick_yoself", 0);
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      specific_worker->kicked_specifically = 1;
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+    }
+  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
+    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
+    GPR_TIMER_MARK("kick_anonymous", 0);
+    specific_worker = pop_front_worker(p);
+    if (specific_worker != NULL) {
+      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
+        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
+        push_back_worker(p, specific_worker);
+        specific_worker = pop_front_worker(p);
+        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
+            gpr_tls_get(&g_current_thread_worker) ==
+                (intptr_t)specific_worker) {
+          push_back_worker(p, specific_worker);
+          specific_worker = NULL;
+        }
+      }
+      if (specific_worker != NULL) {
+        GPR_TIMER_MARK("finally_kick", 0);
+        push_back_worker(p, specific_worker);
+        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
+      }
+    } else {
+      GPR_TIMER_MARK("kicked_no_pollers", 0);
+      p->kicked_without_pollers = 1;
+    }
+  }
+
+  GPR_TIMER_END("pollset_kick_ext", 0);
+}
+
+static void pollset_kick(grpc_pollset *p,
+                         grpc_pollset_worker *specific_worker) {
+  pollset_kick_ext(p, specific_worker, 0);
+}
+
+/* global state management */
+
+static void pollset_global_init(void) {
+  gpr_tls_init(&g_current_thread_poller);
+  gpr_tls_init(&g_current_thread_worker);
+  grpc_wakeup_fd_global_init();
+  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
+}
+
+static void pollset_global_shutdown(void) {
+  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
+  gpr_tls_destroy(&g_current_thread_poller);
+  gpr_tls_destroy(&g_current_thread_worker);
+  grpc_wakeup_fd_global_destroy();
+}
+
+static void kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
+
+/* main interface */
+
+static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null);
+
+static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+  gpr_mu_init(&pollset->mu);
+  *mu = &pollset->mu;
+  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
+  pollset->in_flight_cbs = 0;
+  pollset->shutting_down = 0;
+  pollset->called_shutdown = 0;
+  pollset->kicked_without_pollers = 0;
+  pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
+  pollset->local_wakeup_cache = NULL;
+  pollset->kicked_without_pollers = 0;
+  become_basic_pollset(pollset, NULL);
+}
+
+static void pollset_destroy(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->in_flight_cbs == 0);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
+  pollset->vtable->destroy(pollset);
+  while (pollset->local_wakeup_cache) {
+    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
+    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
+    gpr_free(pollset->local_wakeup_cache);
+    pollset->local_wakeup_cache = next;
+  }
+  gpr_mu_destroy(&pollset->mu);
+}
+
+static void pollset_reset(grpc_pollset *pollset) {
+  GPR_ASSERT(pollset->shutting_down);
+  GPR_ASSERT(pollset->in_flight_cbs == 0);
+  GPR_ASSERT(!pollset_has_workers(pollset));
+  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
+  pollset->vtable->destroy(pollset);
+  pollset->shutting_down = 0;
+  pollset->called_shutdown = 0;
+  pollset->kicked_without_pollers = 0;
+  become_basic_pollset(pollset, NULL);
+}
+
+static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+  gpr_mu_lock(&pollset->mu);
+  pollset->vtable->add_fd(exec_ctx, pollset, fd, 1);
+/* the following (enabled only in debug) will reacquire and then release
+   our lock - meaning that if the unlocking flag passed to add_fd above is
+   not respected, the code will deadlock (in a way that we have a chance of
+   debugging) */
+#ifndef NDEBUG
+  gpr_mu_lock(&pollset->mu);
+  gpr_mu_unlock(&pollset->mu);
+#endif
+}
+
+static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
+  GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
+  pollset->vtable->finish_shutdown(pollset);
+  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
+}
+
+static void pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         grpc_pollset_worker **worker_hdl, gpr_timespec now,
+                         gpr_timespec deadline) {
+  grpc_pollset_worker worker;
+  *worker_hdl = &worker;
+
+  /* pollset->mu already held */
+  int added_worker = 0;
+  int locked = 1;
+  int queued_work = 0;
+  int keep_polling = 0;
+  GPR_TIMER_BEGIN("pollset_work", 0);
+  /* this must happen before we (potentially) drop pollset->mu */
+  worker.next = worker.prev = NULL;
+  worker.reevaluate_polling_on_wakeup = 0;
+  if (pollset->local_wakeup_cache != NULL) {
+    worker.wakeup_fd = pollset->local_wakeup_cache;
+    pollset->local_wakeup_cache = worker.wakeup_fd->next;
+  } else {
+    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
+    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
+  }
+  worker.kicked_specifically = 0;
+  /* If there's work waiting for the pollset to be idle, and the
+     pollset is idle, then do that work */
+  if (!pollset_has_workers(pollset) &&
+      !grpc_closure_list_empty(pollset->idle_jobs)) {
+    GPR_TIMER_MARK("pollset_work.idle_jobs", 0);
+    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+    goto done;
+  }
+  /* If we're shutting down then we don't execute any extended work */
+  if (pollset->shutting_down) {
+    GPR_TIMER_MARK("pollset_work.shutting_down", 0);
+    goto done;
+  }
+  /* Give do_promote priority so we don't starve it out */
+  if (pollset->in_flight_cbs) {
+    GPR_TIMER_MARK("pollset_work.in_flight_cbs", 0);
+    gpr_mu_unlock(&pollset->mu);
+    locked = 0;
+    goto done;
+  }
+  /* Start polling, and keep doing so while we're being asked to
+     re-evaluate our pollers (this allows poll() based pollers to
+     ensure they don't miss wakeups) */
+  keep_polling = 1;
+  while (keep_polling) {
+    keep_polling = 0;
+    if (!pollset->kicked_without_pollers) {
+      if (!added_worker) {
+        push_front_worker(pollset, &worker);
+        added_worker = 1;
+        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
+      }
+      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
+      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
+      pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
+                                             deadline, now);
+      GPR_TIMER_END("maybe_work_and_unlock", 0);
+      locked = 0;
+      gpr_tls_set(&g_current_thread_poller, 0);
+    } else {
+      GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
+      pollset->kicked_without_pollers = 0;
+    }
+  /* Finished execution - start cleaning up.
+     Note that we may arrive here from outside the enclosing while() loop.
+     In that case we won't loop though as we haven't added worker to the
+     worker list, which means nobody could ask us to re-evaluate polling). */
+  done:
+    if (!locked) {
+      queued_work |= grpc_exec_ctx_flush(exec_ctx);
+      gpr_mu_lock(&pollset->mu);
+      locked = 1;
+    }
+    /* If we're forced to re-evaluate polling (via pollset_kick with
+       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
+       a loop */
+    if (worker.reevaluate_polling_on_wakeup) {
+      worker.reevaluate_polling_on_wakeup = 0;
+      pollset->kicked_without_pollers = 0;
+      if (queued_work || worker.kicked_specifically) {
+        /* If there's queued work on the list, then set the deadline to be
+           immediate so we get back out of the polling loop quickly */
+        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
+      }
+      keep_polling = 1;
+    }
+  }
+  if (added_worker) {
+    remove_worker(pollset, &worker);
+    gpr_tls_set(&g_current_thread_worker, 0);
+  }
+  /* release wakeup fd to the local pool */
+  worker.wakeup_fd->next = pollset->local_wakeup_cache;
+  pollset->local_wakeup_cache = worker.wakeup_fd;
+  /* check shutdown conditions */
+  if (pollset->shutting_down) {
+    if (pollset_has_workers(pollset)) {
+      pollset_kick(pollset, NULL);
+    } else if (!pollset->called_shutdown && pollset->in_flight_cbs == 0) {
+      pollset->called_shutdown = 1;
+      gpr_mu_unlock(&pollset->mu);
+      finish_shutdown(exec_ctx, pollset);
+      grpc_exec_ctx_flush(exec_ctx);
+      /* Continuing to access pollset here is safe -- it is the caller's
+       * responsibility to not destroy when it has outstanding calls to
+       * pollset_work.
+       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
+      gpr_mu_lock(&pollset->mu);
+    } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
+      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+      gpr_mu_unlock(&pollset->mu);
+      grpc_exec_ctx_flush(exec_ctx);
+      gpr_mu_lock(&pollset->mu);
+    }
+  }
+  *worker_hdl = NULL;
+  GPR_TIMER_END("pollset_work", 0);
+}
+
+static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                             grpc_closure *closure) {
+  GPR_ASSERT(!pollset->shutting_down);
+  pollset->shutting_down = 1;
+  pollset->shutdown_done = closure;
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+  if (!pollset_has_workers(pollset)) {
+    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
+  }
+  if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
+      !pollset_has_workers(pollset)) {
+    pollset->called_shutdown = 1;
+    finish_shutdown(exec_ctx, pollset);
+  }
+}
+
+static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
+                                           gpr_timespec now) {
+  gpr_timespec timeout;
+  static const int64_t max_spin_polling_us = 10;
+  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
+    return -1;
+  }
+  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
+                                                   max_spin_polling_us,
+                                                   GPR_TIMESPAN))) <= 0) {
+    return 0;
+  }
+  timeout = gpr_time_sub(deadline, now);
+  return gpr_time_to_millis(gpr_time_add(
+      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
+}
+
+/*
+ * basic_pollset - a vtable that provides polling for zero or one file
+ *                 descriptor via poll()
+ */
+
+typedef struct grpc_unary_promote_args {
+  const grpc_pollset_vtable *original_vtable;
+  grpc_pollset *pollset;
+  grpc_fd *fd;
+  grpc_closure promotion_closure;
+} grpc_unary_promote_args;
+
+static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
+                             bool success) {
+  grpc_unary_promote_args *up_args = args;
+  const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
+  grpc_pollset *pollset = up_args->pollset;
+  grpc_fd *fd = up_args->fd;
+
+  /*
+   * This is quite tricky. There are a number of cases to keep in mind here:
+   * 1. fd may have been orphaned
+   * 2. The pollset may no longer be a unary poller (and we can't let case #1
+   * leak to other pollset types!)
+   * 3. pollset's fd (which may have changed) may have been orphaned
+   * 4. The pollset may be shutting down.
+   */
+
+  gpr_mu_lock(&pollset->mu);
+  /* First we need to ensure that nobody is polling concurrently */
+  GPR_ASSERT(!pollset_has_workers(pollset));
+
+  gpr_free(up_args);
+  /* At this point the pollset may no longer be a unary poller. In that case
+   * we should just call the right add function and be done. */
+  /* TODO(klempner): If we're not careful this could cause infinite recursion.
+   * That's not a problem for now because empty_pollset has a trivial poller
+   * and we don't have any mechanism to unbecome multipoller. */
+  pollset->in_flight_cbs--;
+  if (pollset->shutting_down) {
+    /* We don't care about this pollset anymore. */
+    if (pollset->in_flight_cbs == 0 && !pollset->called_shutdown) {
+      pollset->called_shutdown = 1;
+      finish_shutdown(exec_ctx, pollset);
+    }
+  } else if (fd_is_orphaned(fd)) {
+    /* Don't try to add it to anything, we'll drop our ref on it below */
+  } else if (pollset->vtable != original_vtable) {
+    pollset->vtable->add_fd(exec_ctx, pollset, fd, 0);
+  } else if (fd != pollset->data.ptr) {
+    grpc_fd *fds[2];
+    fds[0] = pollset->data.ptr;
+    fds[1] = fd;
+
+    if (fds[0] && !fd_is_orphaned(fds[0])) {
+      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
+      GRPC_FD_UNREF(fds[0], "basicpoll");
+    } else {
+      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
+       * unary poller */
+      /* Note that it is possible that fds[1] is also orphaned at this point.
+       * That's okay, we'll correct it at the next add or poll. */
+      if (fds[0]) GRPC_FD_UNREF(fds[0], "basicpoll");
+      pollset->data.ptr = fd;
+      GRPC_FD_REF(fd, "basicpoll");
+    }
+  }
+
+  gpr_mu_unlock(&pollset->mu);
+
+  /* Matching ref in basic_pollset_add_fd */
+  GRPC_FD_UNREF(fd, "basicpoll_add");
+}
+
+static void basic_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                                 grpc_fd *fd, int and_unlock_pollset) {
+  grpc_unary_promote_args *up_args;
+  GPR_ASSERT(fd);
+  if (fd == pollset->data.ptr) goto exit;
+
+  if (!pollset_has_workers(pollset)) {
+    /* Fast path -- no in flight cbs */
+    /* TODO(klempner): Comment this out and fix any test failures or establish
+     * they are due to timing issues */
+    grpc_fd *fds[2];
+    fds[0] = pollset->data.ptr;
+    fds[1] = fd;
+
+    if (fds[0] == NULL) {
+      pollset->data.ptr = fd;
+      GRPC_FD_REF(fd, "basicpoll");
+    } else if (!fd_is_orphaned(fds[0])) {
+      platform_become_multipoller(exec_ctx, pollset, fds, GPR_ARRAY_SIZE(fds));
+      GRPC_FD_UNREF(fds[0], "basicpoll");
+    } else {
+      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
+       * unary poller */
+      GRPC_FD_UNREF(fds[0], "basicpoll");
+      pollset->data.ptr = fd;
+      GRPC_FD_REF(fd, "basicpoll");
+    }
+    goto exit;
+  }
+
+  /* Now we need to promote. This needs to happen when we're not polling. Since
+   * this may be called from poll, the wait needs to happen asynchronously. */
+  GRPC_FD_REF(fd, "basicpoll_add");
+  pollset->in_flight_cbs++;
+  up_args = gpr_malloc(sizeof(*up_args));
+  up_args->fd = fd;
+  up_args->original_vtable = pollset->vtable;
+  up_args->pollset = pollset;
+  up_args->promotion_closure.cb = basic_do_promote;
+  up_args->promotion_closure.cb_arg = up_args;
+
+  grpc_closure_list_add(&pollset->idle_jobs, &up_args->promotion_closure, 1);
+  pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
+
+exit:
+  if (and_unlock_pollset) {
+    gpr_mu_unlock(&pollset->mu);
+  }
+}
+
+static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
+                                                grpc_pollset *pollset,
+                                                grpc_pollset_worker *worker,
+                                                gpr_timespec deadline,
+                                                gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
+  struct pollfd pfd[3];
+  grpc_fd *fd;
+  grpc_fd_watcher fd_watcher;
+  int timeout;
+  int r;
+  nfds_t nfds;
+
+  fd = pollset->data.ptr;
+  if (fd && fd_is_orphaned(fd)) {
+    GRPC_FD_UNREF(fd, "basicpoll");
+    fd = pollset->data.ptr = NULL;
+  }
+  timeout = poll_deadline_to_millis_timeout(deadline, now);
+  pfd[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
+  pfd[0].events = POLLIN;
+  pfd[0].revents = 0;
+  pfd[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+  pfd[1].events = POLLIN;
+  pfd[1].revents = 0;
+  nfds = 2;
+  if (fd) {
+    pfd[2].fd = fd->fd;
+    pfd[2].revents = 0;
+    GRPC_FD_REF(fd, "basicpoll_begin");
+    gpr_mu_unlock(&pollset->mu);
+    pfd[2].events =
+        (short)fd_begin_poll(fd, pollset, worker, POLLIN, POLLOUT, &fd_watcher);
+    if (pfd[2].events != 0) {
+      nfds++;
+    }
+  } else {
+    gpr_mu_unlock(&pollset->mu);
+  }
+
+  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+     even going into the blocking annotation if possible */
+  /* poll fd count (argument 2) is shortened by one if we have no events
+     to poll on - such that it only includes the kicker */
+  GPR_TIMER_BEGIN("poll", 0);
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  r = grpc_poll_function(pfd, nfds, timeout);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  GPR_TIMER_END("poll", 0);
+
+  if (r < 0) {
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
+    if (fd) {
+      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
+  } else if (r == 0) {
+    if (fd) {
+      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
+  } else {
+    if (pfd[0].revents & POLLIN_CHECK) {
+      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+    }
+    if (pfd[1].revents & POLLIN_CHECK) {
+      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+    }
+    if (nfds > 2) {
+      fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
+                  pfd[2].revents & POLLOUT_CHECK);
+    } else if (fd) {
+      fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
+  }
+
+  if (fd) {
+    GRPC_FD_UNREF(fd, "basicpoll_begin");
+  }
+}
+
+static void basic_pollset_destroy(grpc_pollset *pollset) {
+  if (pollset->data.ptr != NULL) {
+    GRPC_FD_UNREF(pollset->data.ptr, "basicpoll");
+    pollset->data.ptr = NULL;
+  }
+}
+
+static const grpc_pollset_vtable basic_pollset = {
+    basic_pollset_add_fd, basic_pollset_maybe_work_and_unlock,
+    basic_pollset_destroy, basic_pollset_destroy};
+
+static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null) {
+  pollset->vtable = &basic_pollset;
+  pollset->data.ptr = fd_or_null;
+  if (fd_or_null != NULL) {
+    GRPC_FD_REF(fd_or_null, "basicpoll");
+  }
+}
+
+/*******************************************************************************
+ * pollset_multipoller_with_poll_posix.c
+ */
+
+#ifndef GPR_LINUX_MULTIPOLL_WITH_EPOLL
+
+typedef struct {
+  /* all polled fds */
+  size_t fd_count;
+  size_t fd_capacity;
+  grpc_fd **fds;
+  /* fds that have been removed from the pollset explicitly */
+  size_t del_count;
+  size_t del_capacity;
+  grpc_fd **dels;
+} poll_hdr;
+
+static void multipoll_with_poll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
+                                               grpc_pollset *pollset,
+                                               grpc_fd *fd,
+                                               int and_unlock_pollset) {
+  size_t i;
+  poll_hdr *h = pollset->data.ptr;
+  /* TODO(ctiller): this is O(num_fds^2); maybe switch to a hash set here */
+  for (i = 0; i < h->fd_count; i++) {
+    if (h->fds[i] == fd) goto exit;
+  }
+  if (h->fd_count == h->fd_capacity) {
+    h->fd_capacity = GPR_MAX(h->fd_capacity + 8, h->fd_count * 3 / 2);
+    h->fds = gpr_realloc(h->fds, sizeof(grpc_fd *) * h->fd_capacity);
+  }
+  h->fds[h->fd_count++] = fd;
+  GRPC_FD_REF(fd, "multipoller");
+exit:
+  if (and_unlock_pollset) {
+    gpr_mu_unlock(&pollset->mu);
+  }
+}
+
+static void multipoll_with_poll_pollset_maybe_work_and_unlock(
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+    gpr_timespec deadline, gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
+  int timeout;
+  int r;
+  size_t i, j, fd_count;
+  nfds_t pfd_count;
+  poll_hdr *h;
+  /* TODO(ctiller): inline some elements to avoid an allocation */
+  grpc_fd_watcher *watchers;
+  struct pollfd *pfds;
+
+  h = pollset->data.ptr;
+  timeout = poll_deadline_to_millis_timeout(deadline, now);
+  /* TODO(ctiller): perform just one malloc here if we exceed the inline case */
+  pfds = gpr_malloc(sizeof(*pfds) * (h->fd_count + 2));
+  watchers = gpr_malloc(sizeof(*watchers) * (h->fd_count + 2));
+  fd_count = 0;
+  pfd_count = 2;
+  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
+  pfds[0].events = POLLIN;
+  pfds[0].revents = 0;
+  pfds[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+  pfds[1].events = POLLIN;
+  pfds[1].revents = 0;
+  for (i = 0; i < h->fd_count; i++) {
+    int remove = fd_is_orphaned(h->fds[i]);
+    for (j = 0; !remove && j < h->del_count; j++) {
+      if (h->fds[i] == h->dels[j]) remove = 1;
+    }
+    if (remove) {
+      GRPC_FD_UNREF(h->fds[i], "multipoller");
+    } else {
+      h->fds[fd_count++] = h->fds[i];
+      watchers[pfd_count].fd = h->fds[i];
+      GRPC_FD_REF(watchers[pfd_count].fd, "multipoller_start");
+      pfds[pfd_count].fd = h->fds[i]->fd;
+      pfds[pfd_count].revents = 0;
+      pfd_count++;
+    }
+  }
+  for (j = 0; j < h->del_count; j++) {
+    GRPC_FD_UNREF(h->dels[j], "multipoller_del");
+  }
+  h->del_count = 0;
+  h->fd_count = fd_count;
+  gpr_mu_unlock(&pollset->mu);
+
+  for (i = 2; i < pfd_count; i++) {
+    grpc_fd *fd = watchers[i].fd;
+    pfds[i].events = (short)fd_begin_poll(fd, pollset, worker, POLLIN, POLLOUT,
+                                          &watchers[i]);
+    GRPC_FD_UNREF(fd, "multipoller_start");
+  }
+
+  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+     even going into the blocking annotation if possible */
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  r = grpc_poll_function(pfds, pfd_count, timeout);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+
+  if (r < 0) {
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
+    for (i = 2; i < pfd_count; i++) {
+      fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+    }
+  } else if (r == 0) {
+    for (i = 2; i < pfd_count; i++) {
+      fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+    }
+  } else {
+    if (pfds[0].revents & POLLIN_CHECK) {
+      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+    }
+    if (pfds[1].revents & POLLIN_CHECK) {
+      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+    }
+    for (i = 2; i < pfd_count; i++) {
+      if (watchers[i].fd == NULL) {
+        fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+        continue;
+      }
+      fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
+                  pfds[i].revents & POLLOUT_CHECK);
+    }
+  }
+
+  gpr_free(pfds);
+  gpr_free(watchers);
+}
+
+static void multipoll_with_poll_pollset_finish_shutdown(grpc_pollset *pollset) {
+  size_t i;
+  poll_hdr *h = pollset->data.ptr;
+  for (i = 0; i < h->fd_count; i++) {
+    GRPC_FD_UNREF(h->fds[i], "multipoller");
+  }
+  for (i = 0; i < h->del_count; i++) {
+    GRPC_FD_UNREF(h->dels[i], "multipoller_del");
+  }
+  h->fd_count = 0;
+  h->del_count = 0;
+}
+
+static void multipoll_with_poll_pollset_destroy(grpc_pollset *pollset) {
+  poll_hdr *h = pollset->data.ptr;
+  multipoll_with_poll_pollset_finish_shutdown(pollset);
+  gpr_free(h->fds);
+  gpr_free(h->dels);
+  gpr_free(h);
+}
+
+static const grpc_pollset_vtable multipoll_with_poll_pollset = {
+    multipoll_with_poll_pollset_add_fd,
+    multipoll_with_poll_pollset_maybe_work_and_unlock,
+    multipoll_with_poll_pollset_finish_shutdown,
+    multipoll_with_poll_pollset_destroy};
+
+static void poll_become_multipoller(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset *pollset, grpc_fd **fds,
+                                    size_t nfds) {
+  size_t i;
+  poll_hdr *h = gpr_malloc(sizeof(poll_hdr));
+  pollset->vtable = &multipoll_with_poll_pollset;
+  pollset->data.ptr = h;
+  h->fd_count = nfds;
+  h->fd_capacity = nfds;
+  h->fds = gpr_malloc(nfds * sizeof(grpc_fd *));
+  h->del_count = 0;
+  h->del_capacity = 0;
+  h->dels = NULL;
+  for (i = 0; i < nfds; i++) {
+    h->fds[i] = fds[i];
+    GRPC_FD_REF(fds[i], "multipoller");
+  }
+}
+
+#endif /* !GPR_LINUX_MULTIPOLL_WITH_EPOLL */
+
+/*******************************************************************************
+ * pollset_multipoller_with_epoll_posix.c
+ */
+
+#ifdef GPR_LINUX_MULTIPOLL_WITH_EPOLL
+
+#include <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/profiling/timers.h"
+#include "src/core/lib/support/block_annotate.h"
+
+static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
+  /* only one set_ready can be active at once (but there may be a racing
+     notify_on) */
+  gpr_mu_lock(&fd->mu);
+  set_ready_locked(exec_ctx, fd, st);
+  gpr_mu_unlock(&fd->mu);
+}
+
+static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  set_ready(exec_ctx, fd, &fd->read_closure);
+}
+
+static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  set_ready(exec_ctx, fd, &fd->write_closure);
+}
+
+struct epoll_fd_list {
+  int *epoll_fds;
+  size_t count;
+  size_t capacity;
+};
+
+static struct epoll_fd_list epoll_fd_global_list;
+static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
+static gpr_mu epoll_fd_list_mu;
+
+static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
+
+static void add_epoll_fd_to_global_list(int epoll_fd) {
+  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+
+  gpr_mu_lock(&epoll_fd_list_mu);
+  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
+    epoll_fd_global_list.capacity =
+        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
+    epoll_fd_global_list.epoll_fds =
+        gpr_realloc(epoll_fd_global_list.epoll_fds,
+                    epoll_fd_global_list.capacity * sizeof(int));
+  }
+  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_epoll_fd_from_global_list(int epoll_fd) {
+  gpr_mu_lock(&epoll_fd_list_mu);
+  GPR_ASSERT(epoll_fd_global_list.count > 0);
+  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
+      epoll_fd_global_list.epoll_fds[i] =
+          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
+      break;
+    }
+  }
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+static void remove_fd_from_all_epoll_sets(int fd) {
+  int err;
+  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
+  gpr_mu_lock(&epoll_fd_list_mu);
+  if (epoll_fd_global_list.count == 0) {
+    gpr_mu_unlock(&epoll_fd_list_mu);
+    return;
+  }
+  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
+    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
+    if (err < 0 && errno != ENOENT) {
+      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
+              strerror(errno));
+    }
+  }
+  gpr_mu_unlock(&epoll_fd_list_mu);
+}
+
+typedef struct {
+  grpc_pollset *pollset;
+  grpc_fd *fd;
+  grpc_closure closure;
+} delayed_add;
+
+typedef struct { int epoll_fd; } epoll_hdr;
+
+static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_fd *fd) {
+  epoll_hdr *h = pollset->data.ptr;
+  struct epoll_event ev;
+  int err;
+  grpc_fd_watcher watcher;
+
+  /* We pretend to be polling whilst adding an fd to keep the fd from being
+     closed during the add. This may result in a spurious wakeup being assigned
+     to this pollset whilst adding, but that should be benign. */
+  GPR_ASSERT(fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
+  if (watcher.fd != NULL) {
+    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
+    ev.data.ptr = fd;
+    err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
+    if (err < 0) {
+      /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
+      if (errno != EEXIST) {
+        gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
+                strerror(errno));
+      }
+    }
+  }
+  fd_end_poll(exec_ctx, &watcher, 0, 0);
+}
+
+static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
+                                bool iomgr_status) {
+  delayed_add *da = arg;
+
+  if (!fd_is_orphaned(da->fd)) {
+    finally_add_fd(exec_ctx, da->pollset, da->fd);
+  }
+
+  gpr_mu_lock(&da->pollset->mu);
+  da->pollset->in_flight_cbs--;
+  if (da->pollset->shutting_down) {
+    /* We don't care about this pollset anymore. */
+    if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
+      da->pollset->called_shutdown = 1;
+      grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, true, NULL);
+    }
+  }
+  gpr_mu_unlock(&da->pollset->mu);
+
+  GRPC_FD_UNREF(da->fd, "delayed_add");
+
+  gpr_free(da);
+}
+
+static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
+                                                grpc_pollset *pollset,
+                                                grpc_fd *fd,
+                                                int and_unlock_pollset) {
+  if (and_unlock_pollset) {
+    gpr_mu_unlock(&pollset->mu);
+    finally_add_fd(exec_ctx, pollset, fd);
+  } else {
+    delayed_add *da = gpr_malloc(sizeof(*da));
+    da->pollset = pollset;
+    da->fd = fd;
+    GRPC_FD_REF(fd, "delayed_add");
+    grpc_closure_init(&da->closure, perform_delayed_add, da);
+    pollset->in_flight_cbs++;
+    grpc_exec_ctx_enqueue(exec_ctx, &da->closure, true, NULL);
+  }
+}
+
+/* TODO(klempner): We probably want to turn this down a bit */
+#define GRPC_EPOLL_MAX_EVENTS 1000
+
+static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
+    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
+    gpr_timespec deadline, gpr_timespec now) {
+  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
+  int ep_rv;
+  int poll_rv;
+  epoll_hdr *h = pollset->data.ptr;
+  int timeout_ms;
+  struct pollfd pfds[2];
+
+  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
+   * for a more apples-to-apples performance comparison with poll, add a
+   * if (pollset->counter != 0) { return 0; }
+   * here.
+   */
+
+  gpr_mu_unlock(&pollset->mu);
+
+  timeout_ms = poll_deadline_to_millis_timeout(deadline, now);
+
+  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
+  pfds[0].events = POLLIN;
+  pfds[0].revents = 0;
+  pfds[1].fd = h->epoll_fd;
+  pfds[1].events = POLLIN;
+  pfds[1].revents = 0;
+
+  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
+     even going into the blocking annotation if possible */
+  GPR_TIMER_BEGIN("poll", 0);
+  GRPC_SCHEDULING_START_BLOCKING_REGION;
+  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
+  GRPC_SCHEDULING_END_BLOCKING_REGION;
+  GPR_TIMER_END("poll", 0);
+
+  if (poll_rv < 0) {
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
+  } else if (poll_rv == 0) {
+    /* do nothing */
+  } else {
+    if (pfds[0].revents) {
+      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
+    }
+    if (pfds[1].revents) {
+      do {
+        /* The following epoll_wait never blocks; it has a timeout of 0 */
+        ep_rv = epoll_wait(h->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
+        if (ep_rv < 0) {
+          if (errno != EINTR) {
+            gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
+          }
+        } else {
+          int i;
+          for (i = 0; i < ep_rv; ++i) {
+            grpc_fd *fd = ep_ev[i].data.ptr;
+            /* TODO(klempner): We might want to consider making err and pri
+             * separate events */
+            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
+            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
+            int write_ev = ep_ev[i].events & EPOLLOUT;
+            if (fd == NULL) {
+              grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
+            } else {
+              if (read_ev || cancel) {
+                fd_become_readable(exec_ctx, fd);
+              }
+              if (write_ev || cancel) {
+                fd_become_writable(exec_ctx, fd);
+              }
+            }
+          }
+        }
+      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
+    }
+  }
+}
+
+static void multipoll_with_epoll_pollset_finish_shutdown(
+    grpc_pollset *pollset) {}
+
+static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
+  epoll_hdr *h = pollset->data.ptr;
+  close(h->epoll_fd);
+  remove_epoll_fd_from_global_list(h->epoll_fd);
+  gpr_free(h);
+}
+
+static const grpc_pollset_vtable multipoll_with_epoll_pollset = {
+    multipoll_with_epoll_pollset_add_fd,
+    multipoll_with_epoll_pollset_maybe_work_and_unlock,
+    multipoll_with_epoll_pollset_finish_shutdown,
+    multipoll_with_epoll_pollset_destroy};
+
+static void epoll_become_multipoller(grpc_exec_ctx *exec_ctx,
+                                     grpc_pollset *pollset, grpc_fd **fds,
+                                     size_t nfds) {
+  size_t i;
+  epoll_hdr *h = gpr_malloc(sizeof(epoll_hdr));
+  struct epoll_event ev;
+  int err;
+
+  pollset->vtable = &multipoll_with_epoll_pollset;
+  pollset->data.ptr = h;
+  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
+  if (h->epoll_fd < 0) {
+    /* TODO(klempner): Fall back to poll here, especially on ENOSYS */
+    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
+    abort();
+  }
+  add_epoll_fd_to_global_list(h->epoll_fd);
+
+  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
+  ev.data.ptr = NULL;
+  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
+                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
+  if (err < 0) {
+    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
+            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
+            strerror(errno));
+  }
+
+  for (i = 0; i < nfds; i++) {
+    multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fds[i], 0);
+  }
+}
+
+#else /* GPR_LINUX_MULTIPOLL_WITH_EPOLL */
+
+static void remove_fd_from_all_epoll_sets(int fd) {}
+
+#endif /* GPR_LINUX_MULTIPOLL_WITH_EPOLL */
+
+/*******************************************************************************
+ * pollset_set_posix.c
+ */
+
+static grpc_pollset_set *pollset_set_create(void) {
+  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
+  memset(pollset_set, 0, sizeof(*pollset_set));
+  gpr_mu_init(&pollset_set->mu);
+  return pollset_set;
+}
+
+static void pollset_set_destroy(grpc_pollset_set *pollset_set) {
+  size_t i;
+  gpr_mu_destroy(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+  }
+  gpr_free(pollset_set->pollsets);
+  gpr_free(pollset_set->pollset_sets);
+  gpr_free(pollset_set->fds);
+  gpr_free(pollset_set);
+}
+
+static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset_set *pollset_set,
+                                    grpc_pollset *pollset) {
+  size_t i, j;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
+    pollset_set->pollset_capacity =
+        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
+    pollset_set->pollsets =
+        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
+                                               sizeof(*pollset_set->pollsets));
+  }
+  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
+  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
+    if (fd_is_orphaned(pollset_set->fds[i])) {
+      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
+    } else {
+      pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
+      pollset_set->fds[j++] = pollset_set->fds[i];
+    }
+  }
+  pollset_set->fd_count = j;
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+                                    grpc_pollset_set *pollset_set,
+                                    grpc_pollset *pollset) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    if (pollset_set->pollsets[i] == pollset) {
+      pollset_set->pollset_count--;
+      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
+               pollset_set->pollsets[pollset_set->pollset_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+                                        grpc_pollset_set *bag,
+                                        grpc_pollset_set *item) {
+  size_t i, j;
+  gpr_mu_lock(&bag->mu);
+  if (bag->pollset_set_count == bag->pollset_set_capacity) {
+    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
+    bag->pollset_sets =
+        gpr_realloc(bag->pollset_sets,
+                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
+  }
+  bag->pollset_sets[bag->pollset_set_count++] = item;
+  for (i = 0, j = 0; i < bag->fd_count; i++) {
+    if (fd_is_orphaned(bag->fds[i])) {
+      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
+    } else {
+      pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+      bag->fds[j++] = bag->fds[i];
+    }
+  }
+  bag->fd_count = j;
+  gpr_mu_unlock(&bag->mu);
+}
+
+static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+                                        grpc_pollset_set *bag,
+                                        grpc_pollset_set *item) {
+  size_t i;
+  gpr_mu_lock(&bag->mu);
+  for (i = 0; i < bag->pollset_set_count; i++) {
+    if (bag->pollset_sets[i] == item) {
+      bag->pollset_set_count--;
+      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
+               bag->pollset_sets[bag->pollset_set_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&bag->mu);
+}
+
+static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  if (pollset_set->fd_count == pollset_set->fd_capacity) {
+    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
+    pollset_set->fds = gpr_realloc(
+        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
+  }
+  GRPC_FD_REF(fd, "pollset_set");
+  pollset_set->fds[pollset_set->fd_count++] = fd;
+  for (i = 0; i < pollset_set->pollset_count; i++) {
+    pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+                               grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  size_t i;
+  gpr_mu_lock(&pollset_set->mu);
+  for (i = 0; i < pollset_set->fd_count; i++) {
+    if (pollset_set->fds[i] == fd) {
+      pollset_set->fd_count--;
+      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
+               pollset_set->fds[pollset_set->fd_count]);
+      GRPC_FD_UNREF(fd, "pollset_set");
+      break;
+    }
+  }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
+  gpr_mu_unlock(&pollset_set->mu);
+}
+
+/*******************************************************************************
+ * event engine binding
+ */
+
+static void shutdown_engine(void) {
+  fd_global_shutdown();
+  pollset_global_shutdown();
+}
+
+static const grpc_event_engine_vtable vtable = {
+    .pollset_size = sizeof(grpc_pollset),
+
+    .fd_create = fd_create,
+    .fd_wrapped_fd = fd_wrapped_fd,
+    .fd_orphan = fd_orphan,
+    .fd_shutdown = fd_shutdown,
+    .fd_notify_on_read = fd_notify_on_read,
+    .fd_notify_on_write = fd_notify_on_write,
+
+    .pollset_init = pollset_init,
+    .pollset_shutdown = pollset_shutdown,
+    .pollset_reset = pollset_reset,
+    .pollset_destroy = pollset_destroy,
+    .pollset_work = pollset_work,
+    .pollset_kick = pollset_kick,
+    .pollset_add_fd = pollset_add_fd,
+
+    .pollset_set_create = pollset_set_create,
+    .pollset_set_destroy = pollset_set_destroy,
+    .pollset_set_add_pollset = pollset_set_add_pollset,
+    .pollset_set_del_pollset = pollset_set_del_pollset,
+    .pollset_set_add_pollset_set = pollset_set_add_pollset_set,
+    .pollset_set_del_pollset_set = pollset_set_del_pollset_set,
+    .pollset_set_add_fd = pollset_set_add_fd,
+    .pollset_set_del_fd = pollset_set_del_fd,
+
+    .kick_poller = kick_poller,
+
+    .shutdown_engine = shutdown_engine,
+};
+
+const grpc_event_engine_vtable *grpc_init_poll_and_epoll_posix(void) {
+#ifdef GPR_LINUX_MULTIPOLL_WITH_EPOLL
+  platform_become_multipoller = epoll_become_multipoller;
+#else
+  platform_become_multipoller = poll_become_multipoller;
+#endif
+  fd_global_init();
+  pollset_global_init();
+  return &vtable;
+}
+
+#endif
diff --git a/src/core/lib/census/grpc_plugin.h b/src/core/lib/iomgr/ev_poll_and_epoll_posix.h
index 33e5f0b701..06d6dbf29d 100644
--- a/src/core/lib/census/grpc_plugin.h
+++ b/src/core/lib/iomgr/ev_poll_and_epoll_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,10 +31,11 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CENSUS_GRPC_PLUGIN_H
-#define GRPC_CORE_LIB_CENSUS_GRPC_PLUGIN_H
+#ifndef GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H
 
-void census_grpc_plugin_init(void);
-void census_grpc_plugin_destroy(void);
+#include "src/core/lib/iomgr/ev_posix.h"
 
-#endif /* GRPC_CORE_LIB_CENSUS_GRPC_PLUGIN_H */
+const grpc_event_engine_vtable *grpc_init_poll_and_epoll_posix(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_EV_POLL_AND_EPOLL_POSIX_H */
diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c
new file mode 100644
index 0000000000..235a7df08d
--- /dev/null
+++ b/src/core/lib/iomgr/ev_posix.c
@@ -0,0 +1,165 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_POSIX_SOCKET
+
+#include "src/core/lib/iomgr/ev_posix.h"
+
+#include <grpc/support/log.h>
+
+#include "src/core/lib/iomgr/ev_poll_and_epoll_posix.h"
+
+static const grpc_event_engine_vtable *g_event_engine;
+
+grpc_poll_function_type grpc_poll_function = poll;
+grpc_wakeup_fd grpc_global_wakeup_fd;
+
+void grpc_event_engine_init(void) {
+  if ((g_event_engine = grpc_init_poll_and_epoll_posix())) {
+    return;
+  }
+  gpr_log(GPR_ERROR, "No event engine could be initialized");
+  abort();
+}
+
+void grpc_event_engine_shutdown(void) { g_event_engine->shutdown_engine(); }
+
+grpc_fd *grpc_fd_create(int fd, const char *name) {
+  return g_event_engine->fd_create(fd, name);
+}
+
+int grpc_fd_wrapped_fd(grpc_fd *fd) {
+  return g_event_engine->fd_wrapped_fd(fd);
+}
+
+void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
+                    int *release_fd, const char *reason) {
+  g_event_engine->fd_orphan(exec_ctx, fd, on_done, release_fd, reason);
+}
+
+void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
+  g_event_engine->fd_shutdown(exec_ctx, fd);
+}
+
+void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure *closure) {
+  g_event_engine->fd_notify_on_read(exec_ctx, fd, closure);
+}
+
+void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure *closure) {
+  g_event_engine->fd_notify_on_write(exec_ctx, fd, closure);
+}
+
+size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; }
+
+void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
+  g_event_engine->pollset_init(pollset, mu);
+}
+
+void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_closure *closure) {
+  g_event_engine->pollset_shutdown(exec_ctx, pollset, closure);
+}
+
+void grpc_pollset_reset(grpc_pollset *pollset) {
+  g_event_engine->pollset_reset(pollset);
+}
+
+void grpc_pollset_destroy(grpc_pollset *pollset) {
+  g_event_engine->pollset_destroy(pollset);
+}
+
+void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                       grpc_pollset_worker **worker, gpr_timespec now,
+                       gpr_timespec deadline) {
+  g_event_engine->pollset_work(exec_ctx, pollset, worker, now, deadline);
+}
+
+void grpc_pollset_kick(grpc_pollset *pollset,
+                       grpc_pollset_worker *specific_worker) {
+  g_event_engine->pollset_kick(pollset, specific_worker);
+}
+
+void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         struct grpc_fd *fd) {
+  g_event_engine->pollset_add_fd(exec_ctx, pollset, fd);
+}
+
+grpc_pollset_set *grpc_pollset_set_create(void) {
+  return g_event_engine->pollset_set_create();
+}
+
+void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set) {
+  g_event_engine->pollset_set_destroy(pollset_set);
+}
+
+void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
+                                  grpc_pollset_set *pollset_set,
+                                  grpc_pollset *pollset) {
+  g_event_engine->pollset_set_add_pollset(exec_ctx, pollset_set, pollset);
+}
+
+void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
+                                  grpc_pollset_set *pollset_set,
+                                  grpc_pollset *pollset) {
+  g_event_engine->pollset_set_del_pollset(exec_ctx, pollset_set, pollset);
+}
+
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item) {
+  g_event_engine->pollset_set_add_pollset_set(exec_ctx, bag, item);
+}
+
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item) {
+  g_event_engine->pollset_set_del_pollset_set(exec_ctx, bag, item);
+}
+
+void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                             grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  g_event_engine->pollset_set_add_fd(exec_ctx, pollset_set, fd);
+}
+
+void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+                             grpc_pollset_set *pollset_set, grpc_fd *fd) {
+  g_event_engine->pollset_set_del_fd(exec_ctx, pollset_set, fd);
+}
+
+void grpc_kick_poller(void) { g_event_engine->kick_poller(); }
+
+#endif  // GPR_POSIX_SOCKET
diff --git a/src/core/lib/iomgr/ev_posix.h b/src/core/lib/iomgr/ev_posix.h
new file mode 100644
index 0000000000..9d27b2bcda
--- /dev/null
+++ b/src/core/lib/iomgr/ev_posix.h
@@ -0,0 +1,158 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_EV_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_EV_POSIX_H
+
+#include <poll.h>
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+#include "src/core/lib/iomgr/pollset.h"
+#include "src/core/lib/iomgr/pollset_set.h"
+#include "src/core/lib/iomgr/wakeup_fd_posix.h"
+
+typedef struct grpc_fd grpc_fd;
+
+typedef struct grpc_event_engine_vtable {
+  size_t pollset_size;
+
+  grpc_fd *(*fd_create)(int fd, const char *name);
+  int (*fd_wrapped_fd)(grpc_fd *fd);
+  void (*fd_orphan)(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
+                    int *release_fd, const char *reason);
+  void (*fd_shutdown)(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
+  void (*fd_notify_on_read)(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure *closure);
+  void (*fd_notify_on_write)(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure *closure);
+
+  void (*pollset_init)(grpc_pollset *pollset, gpr_mu **mu);
+  void (*pollset_shutdown)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                           grpc_closure *closure);
+  void (*pollset_reset)(grpc_pollset *pollset);
+  void (*pollset_destroy)(grpc_pollset *pollset);
+  void (*pollset_work)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                       grpc_pollset_worker **worker, gpr_timespec now,
+                       gpr_timespec deadline);
+  void (*pollset_kick)(grpc_pollset *pollset,
+                       grpc_pollset_worker *specific_worker);
+  void (*pollset_add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         struct grpc_fd *fd);
+
+  grpc_pollset_set *(*pollset_set_create)(void);
+  void (*pollset_set_destroy)(grpc_pollset_set *pollset_set);
+  void (*pollset_set_add_pollset)(grpc_exec_ctx *exec_ctx,
+                                  grpc_pollset_set *pollset_set,
+                                  grpc_pollset *pollset);
+  void (*pollset_set_del_pollset)(grpc_exec_ctx *exec_ctx,
+                                  grpc_pollset_set *pollset_set,
+                                  grpc_pollset *pollset);
+  void (*pollset_set_add_pollset_set)(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item);
+  void (*pollset_set_del_pollset_set)(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item);
+  void (*pollset_set_add_fd)(grpc_exec_ctx *exec_ctx,
+                             grpc_pollset_set *pollset_set, grpc_fd *fd);
+  void (*pollset_set_del_fd)(grpc_exec_ctx *exec_ctx,
+                             grpc_pollset_set *pollset_set, grpc_fd *fd);
+
+  void (*kick_poller)(void);
+
+  void (*shutdown_engine)(void);
+} grpc_event_engine_vtable;
+
+void grpc_event_engine_init(void);
+void grpc_event_engine_shutdown(void);
+
+/* Create a wrapped file descriptor.
+   Requires fd is a non-blocking file descriptor.
+   This takes ownership of closing fd. */
+grpc_fd *grpc_fd_create(int fd, const char *name);
+
+/* Return the wrapped fd, or -1 if it has been released or closed. */
+int grpc_fd_wrapped_fd(grpc_fd *fd);
+
+/* Releases fd to be asynchronously destroyed.
+   on_done is called when the underlying file descriptor is definitely close()d.
+   If on_done is NULL, no callback will be made.
+   If release_fd is not NULL, it's set to fd and fd will not be closed.
+   Requires: *fd initialized; no outstanding notify_on_read or
+   notify_on_write.
+   MUST NOT be called with a pollset lock taken */
+void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
+                    int *release_fd, const char *reason);
+
+/* Cause any current callbacks to error out with GRPC_CALLBACK_CANCELLED. */
+void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
+
+/* Register read interest, causing read_cb to be called once when fd becomes
+   readable, on deadline specified by deadline, or on shutdown triggered by
+   grpc_fd_shutdown.
+   read_cb will be called with read_cb_arg when *fd becomes readable.
+   read_cb is Called with status of GRPC_CALLBACK_SUCCESS if readable,
+   GRPC_CALLBACK_TIMED_OUT if the call timed out,
+   and CANCELLED if the call was cancelled.
+
+   Requires:This method must not be called before the read_cb for any previous
+   call runs. Edge triggered events are used whenever they are supported by the
+   underlying platform. This means that users must drain fd in read_cb before
+   calling notify_on_read again. Users are also expected to handle spurious
+   events, i.e read_cb is called while nothing can be readable from fd  */
+void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure *closure);
+
+/* Exactly the same semantics as above, except based on writable events.  */
+void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure *closure);
+
+/* pollset_posix functions */
+
+/* Add an fd to a pollset */
+void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
+                         struct grpc_fd *fd);
+
+/* pollset_set_posix functions */
+
+void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
+                             grpc_pollset_set *pollset_set, grpc_fd *fd);
+void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
+                             grpc_pollset_set *pollset_set, grpc_fd *fd);
+
+/* override to allow tests to hook poll() usage */
+typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
+extern grpc_poll_function_type grpc_poll_function;
+extern grpc_wakeup_fd grpc_global_wakeup_fd;
+
+#endif /* GRPC_CORE_LIB_IOMGR_EV_POSIX_H */
diff --git a/src/core/lib/iomgr/exec_ctx.c b/src/core/lib/iomgr/exec_ctx.c
index 1ed6da623a..2146c7dd1f 100644
--- a/src/core/lib/iomgr/exec_ctx.c
+++ b/src/core/lib/iomgr/exec_ctx.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/exec_ctx.h b/src/core/lib/iomgr/exec_ctx.h
index e62ea2dedf..e09ef02400 100644
--- a/src/core/lib/iomgr/exec_ctx.h
+++ b/src/core/lib/iomgr/exec_ctx.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/executor.c b/src/core/lib/iomgr/executor.c
index 42a9db3cbb..36e22e4271 100644
--- a/src/core/lib/iomgr/executor.c
+++ b/src/core/lib/iomgr/executor.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/executor.h b/src/core/lib/iomgr/executor.h
index f1871416a0..b7e6f51aa5 100644
--- a/src/core/lib/iomgr/executor.h
+++ b/src/core/lib/iomgr/executor.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/fd_posix.c b/src/core/lib/iomgr/fd_posix.c
deleted file mode 100644
index 72c924bdcb..0000000000
--- a/src/core/lib/iomgr/fd_posix.c
+++ /dev/null
@@ -1,454 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_POSIX_SOCKET
-
-#include "src/core/lib/iomgr/fd_posix.h"
-
-#include <assert.h>
-#include <sys/socket.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/pollset_posix.h"
-
-#define CLOSURE_NOT_READY ((grpc_closure *)0)
-#define CLOSURE_READY ((grpc_closure *)1)
-
-/* We need to keep a freelist not because of any concerns of malloc performance
- * but instead so that implementations with multiple threads in (for example)
- * epoll_wait deal with the race between pollset removal and incoming poll
- * notifications.
- *
- * The problem is that the poller ultimately holds a reference to this
- * object, so it is very difficult to know when is safe to free it, at least
- * without some expensive synchronization.
- *
- * If we keep the object freelisted, in the worst case losing this race just
- * becomes a spurious read notification on a reused fd.
- */
-/* TODO(klempner): We could use some form of polling generation count to know
- * when these are safe to free. */
-/* TODO(klempner): Consider disabling freelisting if we don't have multiple
- * threads in poll on the same fd */
-/* TODO(klempner): Batch these allocations to reduce fragmentation */
-static grpc_fd *fd_freelist = NULL;
-static gpr_mu fd_freelist_mu;
-
-static void freelist_fd(grpc_fd *fd) {
-  gpr_mu_lock(&fd_freelist_mu);
-  fd->freelist_next = fd_freelist;
-  fd_freelist = fd;
-  grpc_iomgr_unregister_object(&fd->iomgr_object);
-  gpr_mu_unlock(&fd_freelist_mu);
-}
-
-static grpc_fd *alloc_fd(int fd) {
-  grpc_fd *r = NULL;
-  gpr_mu_lock(&fd_freelist_mu);
-  if (fd_freelist != NULL) {
-    r = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-  }
-  gpr_mu_unlock(&fd_freelist_mu);
-  if (r == NULL) {
-    r = gpr_malloc(sizeof(grpc_fd));
-    gpr_mu_init(&r->mu);
-  }
-
-  gpr_mu_lock(&r->mu);
-  r->shutdown = 0;
-  r->read_closure = CLOSURE_NOT_READY;
-  r->write_closure = CLOSURE_NOT_READY;
-  r->fd = fd;
-  r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
-      &r->inactive_watcher_root;
-  r->freelist_next = NULL;
-  r->read_watcher = r->write_watcher = NULL;
-  r->on_done_closure = NULL;
-  r->closed = 0;
-  r->released = 0;
-  gpr_atm_rel_store(&r->refst, 1);
-  gpr_mu_unlock(&r->mu);
-
-  return r;
-}
-
-static void destroy(grpc_fd *fd) {
-  gpr_mu_destroy(&fd->mu);
-  gpr_free(fd);
-}
-
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-#define REF_BY(fd, n, reason) ref_by(fd, n, reason, __FILE__, __LINE__)
-#define UNREF_BY(fd, n, reason) unref_by(fd, n, reason, __FILE__, __LINE__)
-static void ref_by(grpc_fd *fd, int n, const char *reason, const char *file,
-                   int line) {
-  gpr_log(GPR_DEBUG, "FD %d %p   ref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
-          gpr_atm_no_barrier_load(&fd->refst) + n, reason, file, line);
-#else
-#define REF_BY(fd, n, reason) ref_by(fd, n)
-#define UNREF_BY(fd, n, reason) unref_by(fd, n)
-static void ref_by(grpc_fd *fd, int n) {
-#endif
-  GPR_ASSERT(gpr_atm_no_barrier_fetch_add(&fd->refst, n) > 0);
-}
-
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file,
-                     int line) {
-  gpr_atm old;
-  gpr_log(GPR_DEBUG, "FD %d %p unref %d %d -> %d [%s; %s:%d]", fd->fd, fd, n,
-          gpr_atm_no_barrier_load(&fd->refst),
-          gpr_atm_no_barrier_load(&fd->refst) - n, reason, file, line);
-#else
-static void unref_by(grpc_fd *fd, int n) {
-  gpr_atm old;
-#endif
-  old = gpr_atm_full_fetch_add(&fd->refst, -n);
-  if (old == n) {
-    freelist_fd(fd);
-  } else {
-    GPR_ASSERT(old > n);
-  }
-}
-
-void grpc_fd_global_init(void) { gpr_mu_init(&fd_freelist_mu); }
-
-void grpc_fd_global_shutdown(void) {
-  gpr_mu_lock(&fd_freelist_mu);
-  gpr_mu_unlock(&fd_freelist_mu);
-  while (fd_freelist != NULL) {
-    grpc_fd *fd = fd_freelist;
-    fd_freelist = fd_freelist->freelist_next;
-    destroy(fd);
-  }
-  gpr_mu_destroy(&fd_freelist_mu);
-}
-
-grpc_fd *grpc_fd_create(int fd, const char *name) {
-  grpc_fd *r = alloc_fd(fd);
-  char *name2;
-  gpr_asprintf(&name2, "%s fd=%d", name, fd);
-  grpc_iomgr_register_object(&r->iomgr_object, name2);
-  gpr_free(name2);
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-  gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
-#endif
-  return r;
-}
-
-int grpc_fd_is_orphaned(grpc_fd *fd) {
-  return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
-}
-
-static void pollset_kick_locked(grpc_fd_watcher *watcher) {
-  gpr_mu_lock(&watcher->pollset->mu);
-  GPR_ASSERT(watcher->worker);
-  grpc_pollset_kick_ext(watcher->pollset, watcher->worker,
-                        GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
-  gpr_mu_unlock(&watcher->pollset->mu);
-}
-
-static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
-  if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(fd->inactive_watcher_root.next);
-  } else if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
-  } else if (fd->write_watcher) {
-    pollset_kick_locked(fd->write_watcher);
-  }
-}
-
-static void wake_all_watchers_locked(grpc_fd *fd) {
-  grpc_fd_watcher *watcher;
-  for (watcher = fd->inactive_watcher_root.next;
-       watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
-    pollset_kick_locked(watcher);
-  }
-  if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher);
-  }
-  if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(fd->write_watcher);
-  }
-}
-
-static int has_watchers(grpc_fd *fd) {
-  return fd->read_watcher != NULL || fd->write_watcher != NULL ||
-         fd->inactive_watcher_root.next != &fd->inactive_watcher_root;
-}
-
-static void close_fd_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  fd->closed = 1;
-  if (!fd->released) {
-    close(fd->fd);
-  } else {
-    grpc_remove_fd_from_all_epoll_sets(fd->fd);
-  }
-  grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, true, NULL);
-}
-
-int grpc_fd_wrapped_fd(grpc_fd *fd) {
-  if (fd->released || fd->closed) {
-    return -1;
-  } else {
-    return fd->fd;
-  }
-}
-
-void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
-                    int *release_fd, const char *reason) {
-  fd->on_done_closure = on_done;
-  fd->released = release_fd != NULL;
-  if (!fd->released) {
-    shutdown(fd->fd, SHUT_RDWR);
-  } else {
-    *release_fd = fd->fd;
-  }
-  gpr_mu_lock(&fd->mu);
-  REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
-  if (!has_watchers(fd)) {
-    close_fd_locked(exec_ctx, fd);
-  } else {
-    wake_all_watchers_locked(fd);
-  }
-  gpr_mu_unlock(&fd->mu);
-  UNREF_BY(fd, 2, reason); /* drop the reference */
-}
-
-/* increment refcount by two to avoid changing the orphan bit */
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-void grpc_fd_ref(grpc_fd *fd, const char *reason, const char *file, int line) {
-  ref_by(fd, 2, reason, file, line);
-}
-
-void grpc_fd_unref(grpc_fd *fd, const char *reason, const char *file,
-                   int line) {
-  unref_by(fd, 2, reason, file, line);
-}
-#else
-void grpc_fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
-
-void grpc_fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
-#endif
-
-static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             grpc_closure **st, grpc_closure *closure) {
-  if (*st == CLOSURE_NOT_READY) {
-    /* not ready ==> switch to a waiting state by setting the closure */
-    *st = closure;
-  } else if (*st == CLOSURE_READY) {
-    /* already ready ==> queue the closure to run immediately */
-    *st = CLOSURE_NOT_READY;
-    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown, NULL);
-    maybe_wake_one_watcher_locked(fd);
-  } else {
-    /* upcallptr was set to a different closure.  This is an error! */
-    gpr_log(GPR_ERROR,
-            "User called a notify_on function with a previous callback still "
-            "pending");
-    abort();
-  }
-}
-
-/* returns 1 if state becomes not ready */
-static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                            grpc_closure **st) {
-  if (*st == CLOSURE_READY) {
-    /* duplicate ready ==> ignore */
-    return 0;
-  } else if (*st == CLOSURE_NOT_READY) {
-    /* not ready, and not waiting ==> flag ready */
-    *st = CLOSURE_READY;
-    return 0;
-  } else {
-    /* waiting ==> queue closure */
-    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown, NULL);
-    *st = CLOSURE_NOT_READY;
-    return 1;
-  }
-}
-
-static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
-  /* only one set_ready can be active at once (but there may be a racing
-     notify_on) */
-  gpr_mu_lock(&fd->mu);
-  set_ready_locked(exec_ctx, fd, st);
-  gpr_mu_unlock(&fd->mu);
-}
-
-void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  gpr_mu_lock(&fd->mu);
-  GPR_ASSERT(!fd->shutdown);
-  fd->shutdown = 1;
-  set_ready_locked(exec_ctx, fd, &fd->read_closure);
-  set_ready_locked(exec_ctx, fd, &fd->write_closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                            grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             grpc_closure *closure) {
-  gpr_mu_lock(&fd->mu);
-  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
-  gpr_mu_unlock(&fd->mu);
-}
-
-uint32_t grpc_fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                            grpc_pollset_worker *worker, uint32_t read_mask,
-                            uint32_t write_mask, grpc_fd_watcher *watcher) {
-  uint32_t mask = 0;
-  grpc_closure *cur;
-  int requested;
-  /* keep track of pollers that have requested our events, in case they change
-   */
-  GRPC_FD_REF(fd, "poll");
-
-  gpr_mu_lock(&fd->mu);
-
-  /* if we are shutdown, then don't add to the watcher set */
-  if (fd->shutdown) {
-    watcher->fd = NULL;
-    watcher->pollset = NULL;
-    watcher->worker = NULL;
-    gpr_mu_unlock(&fd->mu);
-    GRPC_FD_UNREF(fd, "poll");
-    return 0;
-  }
-
-  /* if there is nobody polling for read, but we need to, then start doing so */
-  cur = fd->read_closure;
-  requested = cur != CLOSURE_READY;
-  if (read_mask && fd->read_watcher == NULL && requested) {
-    fd->read_watcher = watcher;
-    mask |= read_mask;
-  }
-  /* if there is nobody polling for write, but we need to, then start doing so
-   */
-  cur = fd->write_closure;
-  requested = cur != CLOSURE_READY;
-  if (write_mask && fd->write_watcher == NULL && requested) {
-    fd->write_watcher = watcher;
-    mask |= write_mask;
-  }
-  /* if not polling, remember this watcher in case we need someone to later */
-  if (mask == 0 && worker != NULL) {
-    watcher->next = &fd->inactive_watcher_root;
-    watcher->prev = watcher->next->prev;
-    watcher->next->prev = watcher->prev->next = watcher;
-  }
-  watcher->pollset = pollset;
-  watcher->worker = worker;
-  watcher->fd = fd;
-  gpr_mu_unlock(&fd->mu);
-
-  return mask;
-}
-
-void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
-                      int got_read, int got_write) {
-  int was_polling = 0;
-  int kick = 0;
-  grpc_fd *fd = watcher->fd;
-
-  if (fd == NULL) {
-    return;
-  }
-
-  gpr_mu_lock(&fd->mu);
-
-  if (watcher == fd->read_watcher) {
-    /* remove read watcher, kick if we still need a read */
-    was_polling = 1;
-    if (!got_read) {
-      kick = 1;
-    }
-    fd->read_watcher = NULL;
-  }
-  if (watcher == fd->write_watcher) {
-    /* remove write watcher, kick if we still need a write */
-    was_polling = 1;
-    if (!got_write) {
-      kick = 1;
-    }
-    fd->write_watcher = NULL;
-  }
-  if (!was_polling && watcher->worker != NULL) {
-    /* remove from inactive list */
-    watcher->next->prev = watcher->prev;
-    watcher->prev->next = watcher->next;
-  }
-  if (got_read) {
-    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
-      kick = 1;
-    }
-  }
-  if (got_write) {
-    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
-      kick = 1;
-    }
-  }
-  if (kick) {
-    maybe_wake_one_watcher_locked(fd);
-  }
-  if (grpc_fd_is_orphaned(fd) && !has_watchers(fd) && !fd->closed) {
-    close_fd_locked(exec_ctx, fd);
-  }
-  gpr_mu_unlock(&fd->mu);
-
-  GRPC_FD_UNREF(fd, "poll");
-}
-
-void grpc_fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->read_closure);
-}
-
-void grpc_fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->write_closure);
-}
-
-#endif
diff --git a/src/core/lib/iomgr/fd_posix.h b/src/core/lib/iomgr/fd_posix.h
deleted file mode 100644
index 69d09ef5e3..0000000000
--- a/src/core/lib/iomgr/fd_posix.h
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_IOMGR_FD_POSIX_H
-#define GRPC_CORE_LIB_IOMGR_FD_POSIX_H
-
-#include <grpc/support/atm.h>
-#include <grpc/support/sync.h>
-#include <grpc/support/time.h>
-#include "src/core/lib/iomgr/iomgr_internal.h"
-#include "src/core/lib/iomgr/pollset.h"
-
-typedef struct grpc_fd grpc_fd;
-
-typedef struct grpc_fd_watcher {
-  struct grpc_fd_watcher *next;
-  struct grpc_fd_watcher *prev;
-  grpc_pollset *pollset;
-  grpc_pollset_worker *worker;
-  grpc_fd *fd;
-} grpc_fd_watcher;
-
-struct grpc_fd {
-  int fd;
-  /* refst format:
-     bit0:   1=active/0=orphaned
-     bit1-n: refcount
-     meaning that mostly we ref by two to avoid altering the orphaned bit,
-     and just unref by 1 when we're ready to flag the object as orphaned */
-  gpr_atm refst;
-
-  gpr_mu mu;
-  int shutdown;
-  int closed;
-  int released;
-
-  /* The watcher list.
-
-     The following watcher related fields are protected by watcher_mu.
-
-     An fd_watcher is an ephemeral object created when an fd wants to
-     begin polling, and destroyed after the poll.
-
-     It denotes the fd's interest in whether to read poll or write poll
-     or both or neither on this fd.
-
-     If a watcher is asked to poll for reads or writes, the read_watcher
-     or write_watcher fields are set respectively. A watcher may be asked
-     to poll for both, in which case both fields will be set.
-
-     read_watcher and write_watcher may be NULL if no watcher has been
-     asked to poll for reads or writes.
-
-     If an fd_watcher is not asked to poll for reads or writes, it's added
-     to a linked list of inactive watchers, rooted at inactive_watcher_root.
-     If at a later time there becomes need of a poller to poll, one of
-     the inactive pollers may be kicked out of their poll loops to take
-     that responsibility. */
-  grpc_fd_watcher inactive_watcher_root;
-  grpc_fd_watcher *read_watcher;
-  grpc_fd_watcher *write_watcher;
-
-  grpc_closure *read_closure;
-  grpc_closure *write_closure;
-
-  struct grpc_fd *freelist_next;
-
-  grpc_closure *on_done_closure;
-
-  grpc_iomgr_object iomgr_object;
-};
-
-/* Create a wrapped file descriptor.
-   Requires fd is a non-blocking file descriptor.
-   This takes ownership of closing fd. */
-grpc_fd *grpc_fd_create(int fd, const char *name);
-
-/* Return the wrapped fd, or -1 if it has been released or closed. */
-int grpc_fd_wrapped_fd(grpc_fd *fd);
-
-/* Releases fd to be asynchronously destroyed.
-   on_done is called when the underlying file descriptor is definitely close()d.
-   If on_done is NULL, no callback will be made.
-   If release_fd is not NULL, it's set to fd and fd will not be closed.
-   Requires: *fd initialized; no outstanding notify_on_read or
-   notify_on_write.
-   MUST NOT be called with a pollset lock taken */
-void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
-                    int *release_fd, const char *reason);
-
-/* Begin polling on an fd.
-   Registers that the given pollset is interested in this fd - so that if read
-   or writability interest changes, the pollset can be kicked to pick up that
-   new interest.
-   Return value is:
-     (fd_needs_read? read_mask : 0) | (fd_needs_write? write_mask : 0)
-   i.e. a combination of read_mask and write_mask determined by the fd's current
-   interest in said events.
-   Polling strategies that do not need to alter their behavior depending on the
-   fd's current interest (such as epoll) do not need to call this function.
-   MUST NOT be called with a pollset lock taken */
-uint32_t grpc_fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                            grpc_pollset_worker *worker, uint32_t read_mask,
-                            uint32_t write_mask, grpc_fd_watcher *rec);
-/* Complete polling previously started with grpc_fd_begin_poll
-   MUST NOT be called with a pollset lock taken
-   if got_read or got_write are 1, also does the become_{readable,writable} as
-   appropriate. */
-void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
-                      int got_read, int got_write);
-
-/* Return 1 if this fd is orphaned, 0 otherwise */
-int grpc_fd_is_orphaned(grpc_fd *fd);
-
-/* Cause any current callbacks to error out with GRPC_CALLBACK_CANCELLED. */
-void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
-
-/* Register read interest, causing read_cb to be called once when fd becomes
-   readable, on deadline specified by deadline, or on shutdown triggered by
-   grpc_fd_shutdown.
-   read_cb will be called with read_cb_arg when *fd becomes readable.
-   read_cb is Called with status of GRPC_CALLBACK_SUCCESS if readable,
-   GRPC_CALLBACK_TIMED_OUT if the call timed out,
-   and CANCELLED if the call was cancelled.
-
-   Requires:This method must not be called before the read_cb for any previous
-   call runs. Edge triggered events are used whenever they are supported by the
-   underlying platform. This means that users must drain fd in read_cb before
-   calling notify_on_read again. Users are also expected to handle spurious
-   events, i.e read_cb is called while nothing can be readable from fd  */
-void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                            grpc_closure *closure);
-
-/* Exactly the same semantics as above, except based on writable events.  */
-void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             grpc_closure *closure);
-
-/* Notification from the poller to an fd that it has become readable or
-   writable.
-   If allow_synchronous_callback is 1, allow running the fd callback inline
-   in this callstack, otherwise register an asynchronous callback and return */
-void grpc_fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
-void grpc_fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
-
-/* Reference counting for fds */
-/*#define GRPC_FD_REF_COUNT_DEBUG*/
-#ifdef GRPC_FD_REF_COUNT_DEBUG
-void grpc_fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
-void grpc_fd_unref(grpc_fd *fd, const char *reason, const char *file, int line);
-#define GRPC_FD_REF(fd, reason) grpc_fd_ref(fd, reason, __FILE__, __LINE__)
-#define GRPC_FD_UNREF(fd, reason) grpc_fd_unref(fd, reason, __FILE__, __LINE__)
-#else
-void grpc_fd_ref(grpc_fd *fd);
-void grpc_fd_unref(grpc_fd *fd);
-#define GRPC_FD_REF(fd, reason) grpc_fd_ref(fd)
-#define GRPC_FD_UNREF(fd, reason) grpc_fd_unref(fd)
-#endif
-
-void grpc_fd_global_init(void);
-void grpc_fd_global_shutdown(void);
-
-#endif /* GRPC_CORE_LIB_IOMGR_FD_POSIX_H */
diff --git a/src/core/lib/iomgr/iocp_windows.c b/src/core/lib/iomgr/iocp_windows.c
index 682a32c0da..d46558ab1b 100644
--- a/src/core/lib/iomgr/iocp_windows.c
+++ b/src/core/lib/iomgr/iocp_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/iocp_windows.h b/src/core/lib/iomgr/iocp_windows.h
index 856c837fb4..ae210fa7d7 100644
--- a/src/core/lib/iomgr/iocp_windows.h
+++ b/src/core/lib/iomgr/iocp_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/iomgr.c b/src/core/lib/iomgr/iomgr.c
index bb544c8280..146663984d 100644
--- a/src/core/lib/iomgr/iomgr.c
+++ b/src/core/lib/iomgr/iomgr.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -63,7 +63,6 @@ void grpc_iomgr_init(void) {
   g_root_object.next = g_root_object.prev = &g_root_object;
   g_root_object.name = "root";
   grpc_iomgr_platform_init();
-  grpc_pollset_global_init();
 }
 
 static size_t count_objects(void) {
@@ -138,7 +137,6 @@ void grpc_iomgr_shutdown(void) {
   gpr_mu_lock(&g_mu);
   gpr_mu_unlock(&g_mu);
 
-  grpc_pollset_global_shutdown();
   grpc_iomgr_platform_shutdown();
   grpc_exec_ctx_global_shutdown();
   gpr_mu_destroy(&g_mu);
diff --git a/src/core/lib/iomgr/iomgr.h b/src/core/lib/iomgr/iomgr.h
index babf0a85b7..6c82de78ac 100644
--- a/src/core/lib/iomgr/iomgr.h
+++ b/src/core/lib/iomgr/iomgr.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/iomgr_internal.h b/src/core/lib/iomgr/iomgr_internal.h
index 0963630c61..805be1f1e4 100644
--- a/src/core/lib/iomgr/iomgr_internal.h
+++ b/src/core/lib/iomgr/iomgr_internal.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,7 +36,6 @@
 
 #include <stdbool.h>
 
-#include <grpc/support/sync.h>
 #include "src/core/lib/iomgr/iomgr.h"
 
 typedef struct grpc_iomgr_object {
@@ -45,9 +44,6 @@ typedef struct grpc_iomgr_object {
   struct grpc_iomgr_object *prev;
 } grpc_iomgr_object;
 
-void grpc_pollset_global_init(void);
-void grpc_pollset_global_shutdown(void);
-
 void grpc_iomgr_register_object(grpc_iomgr_object *obj, const char *name);
 void grpc_iomgr_unregister_object(grpc_iomgr_object *obj);
 
diff --git a/src/core/lib/iomgr/iomgr_posix.c b/src/core/lib/iomgr/iomgr_posix.c
index e4990f7bce..016c501f75 100644
--- a/src/core/lib/iomgr/iomgr_posix.c
+++ b/src/core/lib/iomgr/iomgr_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,17 +36,17 @@
 #ifdef GPR_POSIX_SOCKET
 
 #include "src/core/lib/debug/trace.h"
-#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/iomgr_posix.h"
 #include "src/core/lib/iomgr/tcp_posix.h"
 
 void grpc_iomgr_platform_init(void) {
-  grpc_fd_global_init();
+  grpc_event_engine_init();
   grpc_register_tracer("tcp", &grpc_tcp_trace);
 }
 
 void grpc_iomgr_platform_flush(void) {}
 
-void grpc_iomgr_platform_shutdown(void) { grpc_fd_global_shutdown(); }
+void grpc_iomgr_platform_shutdown(void) { grpc_event_engine_shutdown(); }
 
 #endif /* GRPC_POSIX_SOCKET */
diff --git a/src/core/lib/iomgr/iomgr_posix.h b/src/core/lib/iomgr/iomgr_posix.h
index 6a8996e403..d5eade962a 100644
--- a/src/core/lib/iomgr/iomgr_posix.h
+++ b/src/core/lib/iomgr/iomgr_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/iomgr_windows.c b/src/core/lib/iomgr/iomgr_windows.c
index af7e616394..398517fc75 100644
--- a/src/core/lib/iomgr/iomgr_windows.c
+++ b/src/core/lib/iomgr/iomgr_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,7 @@
 
 #include "src/core/lib/iomgr/iocp_windows.h"
 #include "src/core/lib/iomgr/iomgr.h"
+#include "src/core/lib/iomgr/pollset_windows.h"
 #include "src/core/lib/iomgr/socket_windows.h"
 
 /* Windows' io manager is going to be fully designed using IO completion
@@ -61,11 +62,13 @@ static void winsock_shutdown(void) {
 void grpc_iomgr_platform_init(void) {
   winsock_init();
   grpc_iocp_init();
+  grpc_pollset_global_init();
 }
 
 void grpc_iomgr_platform_flush(void) { grpc_iocp_flush(); }
 
 void grpc_iomgr_platform_shutdown(void) {
+  grpc_pollset_global_shutdown();
   grpc_iocp_shutdown();
   winsock_shutdown();
 }
diff --git a/src/core/lib/iomgr/pollset.h b/src/core/lib/iomgr/pollset.h
index 6156124862..c40a474877 100644
--- a/src/core/lib/iomgr/pollset.h
+++ b/src/core/lib/iomgr/pollset.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/pollset_multipoller_with_epoll.c b/src/core/lib/iomgr/pollset_multipoller_with_epoll.c
deleted file mode 100644
index fa1b0d2d84..0000000000
--- a/src/core/lib/iomgr/pollset_multipoller_with_epoll.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_LINUX_MULTIPOLL_WITH_EPOLL
-
-#include <errno.h>
-#include <poll.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/useful.h>
-#include "src/core/lib/iomgr/fd_posix.h"
-#include "src/core/lib/iomgr/pollset_posix.h"
-#include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/support/block_annotate.h"
-
-struct epoll_fd_list {
-  int *epoll_fds;
-  size_t count;
-  size_t capacity;
-};
-
-static struct epoll_fd_list epoll_fd_global_list;
-static gpr_once init_epoll_fd_list_mu = GPR_ONCE_INIT;
-static gpr_mu epoll_fd_list_mu;
-
-static void init_mu(void) { gpr_mu_init(&epoll_fd_list_mu); }
-
-static void add_epoll_fd_to_global_list(int epoll_fd) {
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == epoll_fd_global_list.capacity) {
-    epoll_fd_global_list.capacity =
-        GPR_MAX((size_t)8, epoll_fd_global_list.capacity * 2);
-    epoll_fd_global_list.epoll_fds =
-        gpr_realloc(epoll_fd_global_list.epoll_fds,
-                    epoll_fd_global_list.capacity * sizeof(int));
-  }
-  epoll_fd_global_list.epoll_fds[epoll_fd_global_list.count++] = epoll_fd;
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-static void remove_epoll_fd_from_global_list(int epoll_fd) {
-  gpr_mu_lock(&epoll_fd_list_mu);
-  GPR_ASSERT(epoll_fd_global_list.count > 0);
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    if (epoll_fd == epoll_fd_global_list.epoll_fds[i]) {
-      epoll_fd_global_list.epoll_fds[i] =
-          epoll_fd_global_list.epoll_fds[--(epoll_fd_global_list.count)];
-      break;
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-void grpc_remove_fd_from_all_epoll_sets(int fd) {
-  int err;
-  gpr_once_init(&init_epoll_fd_list_mu, init_mu);
-  gpr_mu_lock(&epoll_fd_list_mu);
-  if (epoll_fd_global_list.count == 0) {
-    gpr_mu_unlock(&epoll_fd_list_mu);
-    return;
-  }
-  for (size_t i = 0; i < epoll_fd_global_list.count; i++) {
-    err = epoll_ctl(epoll_fd_global_list.epoll_fds[i], EPOLL_CTL_DEL, fd, NULL);
-    if (err < 0 && errno != ENOENT) {
-      gpr_log(GPR_ERROR, "epoll_ctl del for %d failed: %s", fd,
-              strerror(errno));
-    }
-  }
-  gpr_mu_unlock(&epoll_fd_list_mu);
-}
-
-typedef struct {
-  grpc_pollset *pollset;
-  grpc_fd *fd;
-  grpc_closure closure;
-} delayed_add;
-
-typedef struct { int epoll_fd; } pollset_hdr;
-
-static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_fd *fd) {
-  pollset_hdr *h = pollset->data.ptr;
-  struct epoll_event ev;
-  int err;
-  grpc_fd_watcher watcher;
-
-  /* We pretend to be polling whilst adding an fd to keep the fd from being
-     closed during the add. This may result in a spurious wakeup being assigned
-     to this pollset whilst adding, but that should be benign. */
-  GPR_ASSERT(grpc_fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
-  if (watcher.fd != NULL) {
-    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
-    ev.data.ptr = fd;
-    err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
-    if (err < 0) {
-      /* FDs may be added to a pollset multiple times, so EEXIST is normal. */
-      if (errno != EEXIST) {
-        gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s", fd->fd,
-                strerror(errno));
-      }
-    }
-  }
-  grpc_fd_end_poll(exec_ctx, &watcher, 0, 0);
-}
-
-static void perform_delayed_add(grpc_exec_ctx *exec_ctx, void *arg,
-                                bool iomgr_status) {
-  delayed_add *da = arg;
-
-  if (!grpc_fd_is_orphaned(da->fd)) {
-    finally_add_fd(exec_ctx, da->pollset, da->fd);
-  }
-
-  gpr_mu_lock(&da->pollset->mu);
-  da->pollset->in_flight_cbs--;
-  if (da->pollset->shutting_down) {
-    /* We don't care about this pollset anymore. */
-    if (da->pollset->in_flight_cbs == 0 && !da->pollset->called_shutdown) {
-      da->pollset->called_shutdown = 1;
-      grpc_exec_ctx_enqueue(exec_ctx, da->pollset->shutdown_done, true, NULL);
-    }
-  }
-  gpr_mu_unlock(&da->pollset->mu);
-
-  GRPC_FD_UNREF(da->fd, "delayed_add");
-
-  gpr_free(da);
-}
-
-static void multipoll_with_epoll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
-                                                grpc_pollset *pollset,
-                                                grpc_fd *fd,
-                                                int and_unlock_pollset) {
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-    finally_add_fd(exec_ctx, pollset, fd);
-  } else {
-    delayed_add *da = gpr_malloc(sizeof(*da));
-    da->pollset = pollset;
-    da->fd = fd;
-    GRPC_FD_REF(fd, "delayed_add");
-    grpc_closure_init(&da->closure, perform_delayed_add, da);
-    pollset->in_flight_cbs++;
-    grpc_exec_ctx_enqueue(exec_ctx, &da->closure, true, NULL);
-  }
-}
-
-/* TODO(klempner): We probably want to turn this down a bit */
-#define GRPC_EPOLL_MAX_EVENTS 1000
-
-static void multipoll_with_epoll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
-  struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
-  int ep_rv;
-  int poll_rv;
-  pollset_hdr *h = pollset->data.ptr;
-  int timeout_ms;
-  struct pollfd pfds[2];
-
-  /* If you want to ignore epoll's ability to sanely handle parallel pollers,
-   * for a more apples-to-apples performance comparison with poll, add a
-   * if (pollset->counter != 0) { return 0; }
-   * here.
-   */
-
-  gpr_mu_unlock(&pollset->mu);
-
-  timeout_ms = grpc_poll_deadline_to_millis_timeout(deadline, now);
-
-  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfds[0].events = POLLIN;
-  pfds[0].revents = 0;
-  pfds[1].fd = h->epoll_fd;
-  pfds[1].events = POLLIN;
-  pfds[1].revents = 0;
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  poll_rv = grpc_poll_function(pfds, 2, timeout_ms);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (poll_rv < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
-    }
-  } else if (poll_rv == 0) {
-    /* do nothing */
-  } else {
-    if (pfds[0].revents) {
-      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
-    }
-    if (pfds[1].revents) {
-      do {
-        /* The following epoll_wait never blocks; it has a timeout of 0 */
-        ep_rv = epoll_wait(h->epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0);
-        if (ep_rv < 0) {
-          if (errno != EINTR) {
-            gpr_log(GPR_ERROR, "epoll_wait() failed: %s", strerror(errno));
-          }
-        } else {
-          int i;
-          for (i = 0; i < ep_rv; ++i) {
-            grpc_fd *fd = ep_ev[i].data.ptr;
-            /* TODO(klempner): We might want to consider making err and pri
-             * separate events */
-            int cancel = ep_ev[i].events & (EPOLLERR | EPOLLHUP);
-            int read_ev = ep_ev[i].events & (EPOLLIN | EPOLLPRI);
-            int write_ev = ep_ev[i].events & EPOLLOUT;
-            if (fd == NULL) {
-              grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-            } else {
-              if (read_ev || cancel) {
-                grpc_fd_become_readable(exec_ctx, fd);
-              }
-              if (write_ev || cancel) {
-                grpc_fd_become_writable(exec_ctx, fd);
-              }
-            }
-          }
-        }
-      } while (ep_rv == GRPC_EPOLL_MAX_EVENTS);
-    }
-  }
-}
-
-static void multipoll_with_epoll_pollset_finish_shutdown(
-    grpc_pollset *pollset) {}
-
-static void multipoll_with_epoll_pollset_destroy(grpc_pollset *pollset) {
-  pollset_hdr *h = pollset->data.ptr;
-  close(h->epoll_fd);
-  remove_epoll_fd_from_global_list(h->epoll_fd);
-  gpr_free(h);
-}
-
-static const grpc_pollset_vtable multipoll_with_epoll_pollset = {
-    multipoll_with_epoll_pollset_add_fd,
-    multipoll_with_epoll_pollset_maybe_work_and_unlock,
-    multipoll_with_epoll_pollset_finish_shutdown,
-    multipoll_with_epoll_pollset_destroy};
-
-static void epoll_become_multipoller(grpc_exec_ctx *exec_ctx,
-                                     grpc_pollset *pollset, grpc_fd **fds,
-                                     size_t nfds) {
-  size_t i;
-  pollset_hdr *h = gpr_malloc(sizeof(pollset_hdr));
-  struct epoll_event ev;
-  int err;
-
-  pollset->vtable = &multipoll_with_epoll_pollset;
-  pollset->data.ptr = h;
-  h->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-  if (h->epoll_fd < 0) {
-    /* TODO(klempner): Fall back to poll here, especially on ENOSYS */
-    gpr_log(GPR_ERROR, "epoll_create1 failed: %s", strerror(errno));
-    abort();
-  }
-  add_epoll_fd_to_global_list(h->epoll_fd);
-
-  ev.events = (uint32_t)(EPOLLIN | EPOLLET);
-  ev.data.ptr = NULL;
-  err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD,
-                  GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd), &ev);
-  if (err < 0) {
-    gpr_log(GPR_ERROR, "epoll_ctl add for %d failed: %s",
-            GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd),
-            strerror(errno));
-  }
-
-  for (i = 0; i < nfds; i++) {
-    multipoll_with_epoll_pollset_add_fd(exec_ctx, pollset, fds[i], 0);
-  }
-}
-
-grpc_platform_become_multipoller_type grpc_platform_become_multipoller =
-    epoll_become_multipoller;
-
-#else /* GPR_LINUX_MULTIPOLL_WITH_EPOLL */
-
-void grpc_remove_fd_from_all_epoll_sets(int fd) {}
-
-#endif /* GPR_LINUX_MULTIPOLL_WITH_EPOLL */
diff --git a/src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c b/src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c
deleted file mode 100644
index 9b33f6dbb2..0000000000
--- a/src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_POSIX_SOCKET
-
-#include "src/core/lib/iomgr/pollset_posix.h"
-
-#include <errno.h>
-#include <poll.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/fd_posix.h"
-#include "src/core/lib/iomgr/iomgr_internal.h"
-#include "src/core/lib/iomgr/pollset_posix.h"
-#include "src/core/lib/support/block_annotate.h"
-
-typedef struct {
-  /* all polled fds */
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
-  /* fds that have been removed from the pollset explicitly */
-  size_t del_count;
-  size_t del_capacity;
-  grpc_fd **dels;
-} pollset_hdr;
-
-static void multipoll_with_poll_pollset_add_fd(grpc_exec_ctx *exec_ctx,
-                                               grpc_pollset *pollset,
-                                               grpc_fd *fd,
-                                               int and_unlock_pollset) {
-  size_t i;
-  pollset_hdr *h = pollset->data.ptr;
-  /* TODO(ctiller): this is O(num_fds^2); maybe switch to a hash set here */
-  for (i = 0; i < h->fd_count; i++) {
-    if (h->fds[i] == fd) goto exit;
-  }
-  if (h->fd_count == h->fd_capacity) {
-    h->fd_capacity = GPR_MAX(h->fd_capacity + 8, h->fd_count * 3 / 2);
-    h->fds = gpr_realloc(h->fds, sizeof(grpc_fd *) * h->fd_capacity);
-  }
-  h->fds[h->fd_count++] = fd;
-  GRPC_FD_REF(fd, "multipoller");
-exit:
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-  }
-}
-
-static void multipoll_with_poll_pollset_maybe_work_and_unlock(
-    grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
-    gpr_timespec deadline, gpr_timespec now) {
-#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
-#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
-
-  int timeout;
-  int r;
-  size_t i, j, fd_count;
-  nfds_t pfd_count;
-  pollset_hdr *h;
-  /* TODO(ctiller): inline some elements to avoid an allocation */
-  grpc_fd_watcher *watchers;
-  struct pollfd *pfds;
-
-  h = pollset->data.ptr;
-  timeout = grpc_poll_deadline_to_millis_timeout(deadline, now);
-  /* TODO(ctiller): perform just one malloc here if we exceed the inline case */
-  pfds = gpr_malloc(sizeof(*pfds) * (h->fd_count + 2));
-  watchers = gpr_malloc(sizeof(*watchers) * (h->fd_count + 2));
-  fd_count = 0;
-  pfd_count = 2;
-  pfds[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
-  pfds[0].events = POLLIN;
-  pfds[0].revents = 0;
-  pfds[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfds[1].events = POLLIN;
-  pfds[1].revents = 0;
-  for (i = 0; i < h->fd_count; i++) {
-    int remove = grpc_fd_is_orphaned(h->fds[i]);
-    for (j = 0; !remove && j < h->del_count; j++) {
-      if (h->fds[i] == h->dels[j]) remove = 1;
-    }
-    if (remove) {
-      GRPC_FD_UNREF(h->fds[i], "multipoller");
-    } else {
-      h->fds[fd_count++] = h->fds[i];
-      watchers[pfd_count].fd = h->fds[i];
-      GRPC_FD_REF(watchers[pfd_count].fd, "multipoller_start");
-      pfds[pfd_count].fd = h->fds[i]->fd;
-      pfds[pfd_count].revents = 0;
-      pfd_count++;
-    }
-  }
-  for (j = 0; j < h->del_count; j++) {
-    GRPC_FD_UNREF(h->dels[j], "multipoller_del");
-  }
-  h->del_count = 0;
-  h->fd_count = fd_count;
-  gpr_mu_unlock(&pollset->mu);
-
-  for (i = 2; i < pfd_count; i++) {
-    grpc_fd *fd = watchers[i].fd;
-    pfds[i].events = (short)grpc_fd_begin_poll(fd, pollset, worker, POLLIN,
-                                               POLLOUT, &watchers[i]);
-    GRPC_FD_UNREF(fd, "multipoller_start");
-  }
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  r = grpc_poll_function(pfds, pfd_count, timeout);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-
-  if (r < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
-    }
-    for (i = 2; i < pfd_count; i++) {
-      grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
-    }
-  } else if (r == 0) {
-    for (i = 2; i < pfd_count; i++) {
-      grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
-    }
-  } else {
-    if (pfds[0].revents & POLLIN_CHECK) {
-      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-    }
-    if (pfds[1].revents & POLLIN_CHECK) {
-      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
-    }
-    for (i = 2; i < pfd_count; i++) {
-      if (watchers[i].fd == NULL) {
-        grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
-        continue;
-      }
-      grpc_fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
-                       pfds[i].revents & POLLOUT_CHECK);
-    }
-  }
-
-  gpr_free(pfds);
-  gpr_free(watchers);
-}
-
-static void multipoll_with_poll_pollset_finish_shutdown(grpc_pollset *pollset) {
-  size_t i;
-  pollset_hdr *h = pollset->data.ptr;
-  for (i = 0; i < h->fd_count; i++) {
-    GRPC_FD_UNREF(h->fds[i], "multipoller");
-  }
-  for (i = 0; i < h->del_count; i++) {
-    GRPC_FD_UNREF(h->dels[i], "multipoller_del");
-  }
-  h->fd_count = 0;
-  h->del_count = 0;
-}
-
-static void multipoll_with_poll_pollset_destroy(grpc_pollset *pollset) {
-  pollset_hdr *h = pollset->data.ptr;
-  multipoll_with_poll_pollset_finish_shutdown(pollset);
-  gpr_free(h->fds);
-  gpr_free(h->dels);
-  gpr_free(h);
-}
-
-static const grpc_pollset_vtable multipoll_with_poll_pollset = {
-    multipoll_with_poll_pollset_add_fd,
-    multipoll_with_poll_pollset_maybe_work_and_unlock,
-    multipoll_with_poll_pollset_finish_shutdown,
-    multipoll_with_poll_pollset_destroy};
-
-void grpc_poll_become_multipoller(grpc_exec_ctx *exec_ctx,
-                                  grpc_pollset *pollset, grpc_fd **fds,
-                                  size_t nfds) {
-  size_t i;
-  pollset_hdr *h = gpr_malloc(sizeof(pollset_hdr));
-  pollset->vtable = &multipoll_with_poll_pollset;
-  pollset->data.ptr = h;
-  h->fd_count = nfds;
-  h->fd_capacity = nfds;
-  h->fds = gpr_malloc(nfds * sizeof(grpc_fd *));
-  h->del_count = 0;
-  h->del_capacity = 0;
-  h->dels = NULL;
-  for (i = 0; i < nfds; i++) {
-    h->fds[i] = fds[i];
-    GRPC_FD_REF(fds[i], "multipoller");
-  }
-}
-
-#endif /* GPR_POSIX_SOCKET */
-
-#ifdef GPR_POSIX_MULTIPOLL_WITH_POLL
-grpc_platform_become_multipoller_type grpc_platform_become_multipoller =
-    grpc_poll_become_multipoller;
-#endif
diff --git a/src/core/lib/iomgr/pollset_posix.c b/src/core/lib/iomgr/pollset_posix.c
deleted file mode 100644
index 259c7bc194..0000000000
--- a/src/core/lib/iomgr/pollset_posix.c
+++ /dev/null
@@ -1,633 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_POSIX_SOCKET
-
-#include "src/core/lib/iomgr/pollset_posix.h"
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/tls.h>
-#include <grpc/support/useful.h>
-#include "src/core/lib/iomgr/fd_posix.h"
-#include "src/core/lib/iomgr/iomgr_internal.h"
-#include "src/core/lib/iomgr/socket_utils_posix.h"
-#include "src/core/lib/profiling/timers.h"
-#include "src/core/lib/support/block_annotate.h"
-
-GPR_TLS_DECL(g_current_thread_poller);
-GPR_TLS_DECL(g_current_thread_worker);
-
-/** Default poll() function - a pointer so that it can be overridden by some
- *  tests */
-grpc_poll_function_type grpc_poll_function = poll;
-
-/** The alarm system needs to be able to wakeup 'some poller' sometimes
- *  (specifically when a new alarm needs to be triggered earlier than the next
- *  alarm 'epoch').
- *  This wakeup_fd gives us something to alert on when such a case occurs. */
-grpc_wakeup_fd grpc_global_wakeup_fd;
-
-static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev->next = worker->next;
-  worker->next->prev = worker->prev;
-}
-
-int grpc_pollset_has_workers(grpc_pollset *p) {
-  return p->root_worker.next != &p->root_worker;
-}
-
-static grpc_pollset_worker *pop_front_worker(grpc_pollset *p) {
-  if (grpc_pollset_has_workers(p)) {
-    grpc_pollset_worker *w = p->root_worker.next;
-    remove_worker(p, w);
-    return w;
-  } else {
-    return NULL;
-  }
-}
-
-static void push_back_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->next = &p->root_worker;
-  worker->prev = worker->next->prev;
-  worker->prev->next = worker->next->prev = worker;
-}
-
-static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
-  worker->prev = &p->root_worker;
-  worker->next = worker->prev->next;
-  worker->prev->next = worker->next->prev = worker;
-}
-
-size_t grpc_pollset_size(void) { return sizeof(grpc_pollset); }
-
-void grpc_pollset_kick_ext(grpc_pollset *p,
-                           grpc_pollset_worker *specific_worker,
-                           uint32_t flags) {
-  GPR_TIMER_BEGIN("grpc_pollset_kick_ext", 0);
-
-  /* pollset->mu already held */
-  if (specific_worker != NULL) {
-    if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
-      GPR_TIMER_BEGIN("grpc_pollset_kick_ext.broadcast", 0);
-      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
-      for (specific_worker = p->root_worker.next;
-           specific_worker != &p->root_worker;
-           specific_worker = specific_worker->next) {
-        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-      }
-      p->kicked_without_pollers = 1;
-      GPR_TIMER_END("grpc_pollset_kick_ext.broadcast", 0);
-    } else if (gpr_tls_get(&g_current_thread_worker) !=
-               (intptr_t)specific_worker) {
-      GPR_TIMER_MARK("different_thread_worker", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = 1;
-      }
-      specific_worker->kicked_specifically = 1;
-      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
-      GPR_TIMER_MARK("kick_yoself", 0);
-      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
-        specific_worker->reevaluate_polling_on_wakeup = 1;
-      }
-      specific_worker->kicked_specifically = 1;
-      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-    }
-  } else if (gpr_tls_get(&g_current_thread_poller) != (intptr_t)p) {
-    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
-    GPR_TIMER_MARK("kick_anonymous", 0);
-    specific_worker = pop_front_worker(p);
-    if (specific_worker != NULL) {
-      if (gpr_tls_get(&g_current_thread_worker) == (intptr_t)specific_worker) {
-        GPR_TIMER_MARK("kick_anonymous_not_self", 0);
-        push_back_worker(p, specific_worker);
-        specific_worker = pop_front_worker(p);
-        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
-            gpr_tls_get(&g_current_thread_worker) ==
-                (intptr_t)specific_worker) {
-          push_back_worker(p, specific_worker);
-          specific_worker = NULL;
-        }
-      }
-      if (specific_worker != NULL) {
-        GPR_TIMER_MARK("finally_kick", 0);
-        push_back_worker(p, specific_worker);
-        grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd);
-      }
-    } else {
-      GPR_TIMER_MARK("kicked_no_pollers", 0);
-      p->kicked_without_pollers = 1;
-    }
-  }
-
-  GPR_TIMER_END("grpc_pollset_kick_ext", 0);
-}
-
-void grpc_pollset_kick(grpc_pollset *p, grpc_pollset_worker *specific_worker) {
-  grpc_pollset_kick_ext(p, specific_worker, 0);
-}
-
-/* global state management */
-
-void grpc_pollset_global_init(void) {
-  gpr_tls_init(&g_current_thread_poller);
-  gpr_tls_init(&g_current_thread_worker);
-  grpc_wakeup_fd_global_init();
-  grpc_wakeup_fd_init(&grpc_global_wakeup_fd);
-}
-
-void grpc_pollset_global_shutdown(void) {
-  grpc_wakeup_fd_destroy(&grpc_global_wakeup_fd);
-  gpr_tls_destroy(&g_current_thread_poller);
-  gpr_tls_destroy(&g_current_thread_worker);
-  grpc_wakeup_fd_global_destroy();
-}
-
-void grpc_kick_poller(void) { grpc_wakeup_fd_wakeup(&grpc_global_wakeup_fd); }
-
-/* main interface */
-
-static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null);
-
-void grpc_pollset_init(grpc_pollset *pollset, gpr_mu **mu) {
-  gpr_mu_init(&pollset->mu);
-  *mu = &pollset->mu;
-  pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker;
-  pollset->in_flight_cbs = 0;
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-  pollset->idle_jobs.head = pollset->idle_jobs.tail = NULL;
-  pollset->local_wakeup_cache = NULL;
-  pollset->kicked_without_pollers = 0;
-  become_basic_pollset(pollset, NULL);
-}
-
-void grpc_pollset_destroy(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->in_flight_cbs == 0);
-  GPR_ASSERT(!grpc_pollset_has_workers(pollset));
-  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-  pollset->vtable->destroy(pollset);
-  while (pollset->local_wakeup_cache) {
-    grpc_cached_wakeup_fd *next = pollset->local_wakeup_cache->next;
-    grpc_wakeup_fd_destroy(&pollset->local_wakeup_cache->fd);
-    gpr_free(pollset->local_wakeup_cache);
-    pollset->local_wakeup_cache = next;
-  }
-}
-
-void grpc_pollset_reset(grpc_pollset *pollset) {
-  GPR_ASSERT(pollset->shutting_down);
-  GPR_ASSERT(pollset->in_flight_cbs == 0);
-  GPR_ASSERT(!grpc_pollset_has_workers(pollset));
-  GPR_ASSERT(pollset->idle_jobs.head == pollset->idle_jobs.tail);
-  pollset->vtable->destroy(pollset);
-  pollset->shutting_down = 0;
-  pollset->called_shutdown = 0;
-  pollset->kicked_without_pollers = 0;
-  become_basic_pollset(pollset, NULL);
-}
-
-void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                         grpc_fd *fd) {
-  gpr_mu_lock(&pollset->mu);
-  pollset->vtable->add_fd(exec_ctx, pollset, fd, 1);
-/* the following (enabled only in debug) will reacquire and then release
-   our lock - meaning that if the unlocking flag passed to add_fd above is
-   not respected, the code will deadlock (in a way that we have a chance of
-   debugging) */
-#ifndef NDEBUG
-  gpr_mu_lock(&pollset->mu);
-  gpr_mu_unlock(&pollset->mu);
-#endif
-}
-
-static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) {
-  GPR_ASSERT(grpc_closure_list_empty(pollset->idle_jobs));
-  pollset->vtable->finish_shutdown(pollset);
-  grpc_exec_ctx_enqueue(exec_ctx, pollset->shutdown_done, true, NULL);
-}
-
-void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                       grpc_pollset_worker **worker_hdl, gpr_timespec now,
-                       gpr_timespec deadline) {
-  grpc_pollset_worker worker;
-  *worker_hdl = &worker;
-
-  /* pollset->mu already held */
-  int added_worker = 0;
-  int locked = 1;
-  int queued_work = 0;
-  int keep_polling = 0;
-  GPR_TIMER_BEGIN("grpc_pollset_work", 0);
-  /* this must happen before we (potentially) drop pollset->mu */
-  worker.next = worker.prev = NULL;
-  worker.reevaluate_polling_on_wakeup = 0;
-  if (pollset->local_wakeup_cache != NULL) {
-    worker.wakeup_fd = pollset->local_wakeup_cache;
-    pollset->local_wakeup_cache = worker.wakeup_fd->next;
-  } else {
-    worker.wakeup_fd = gpr_malloc(sizeof(*worker.wakeup_fd));
-    grpc_wakeup_fd_init(&worker.wakeup_fd->fd);
-  }
-  worker.kicked_specifically = 0;
-  /* If there's work waiting for the pollset to be idle, and the
-     pollset is idle, then do that work */
-  if (!grpc_pollset_has_workers(pollset) &&
-      !grpc_closure_list_empty(pollset->idle_jobs)) {
-    GPR_TIMER_MARK("grpc_pollset_work.idle_jobs", 0);
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-    goto done;
-  }
-  /* If we're shutting down then we don't execute any extended work */
-  if (pollset->shutting_down) {
-    GPR_TIMER_MARK("grpc_pollset_work.shutting_down", 0);
-    goto done;
-  }
-  /* Give do_promote priority so we don't starve it out */
-  if (pollset->in_flight_cbs) {
-    GPR_TIMER_MARK("grpc_pollset_work.in_flight_cbs", 0);
-    gpr_mu_unlock(&pollset->mu);
-    locked = 0;
-    goto done;
-  }
-  /* Start polling, and keep doing so while we're being asked to
-     re-evaluate our pollers (this allows poll() based pollers to
-     ensure they don't miss wakeups) */
-  keep_polling = 1;
-  while (keep_polling) {
-    keep_polling = 0;
-    if (!pollset->kicked_without_pollers) {
-      if (!added_worker) {
-        push_front_worker(pollset, &worker);
-        added_worker = 1;
-        gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
-      }
-      gpr_tls_set(&g_current_thread_poller, (intptr_t)pollset);
-      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
-      pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, &worker,
-                                             deadline, now);
-      GPR_TIMER_END("maybe_work_and_unlock", 0);
-      locked = 0;
-      gpr_tls_set(&g_current_thread_poller, 0);
-    } else {
-      GPR_TIMER_MARK("grpc_pollset_work.kicked_without_pollers", 0);
-      pollset->kicked_without_pollers = 0;
-    }
-  /* Finished execution - start cleaning up.
-     Note that we may arrive here from outside the enclosing while() loop.
-     In that case we won't loop though as we haven't added worker to the
-     worker list, which means nobody could ask us to re-evaluate polling). */
-  done:
-    if (!locked) {
-      queued_work |= grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
-      locked = 1;
-    }
-    /* If we're forced to re-evaluate polling (via grpc_pollset_kick with
-       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
-       a loop */
-    if (worker.reevaluate_polling_on_wakeup) {
-      worker.reevaluate_polling_on_wakeup = 0;
-      pollset->kicked_without_pollers = 0;
-      if (queued_work || worker.kicked_specifically) {
-        /* If there's queued work on the list, then set the deadline to be
-           immediate so we get back out of the polling loop quickly */
-        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
-      }
-      keep_polling = 1;
-    }
-  }
-  if (added_worker) {
-    remove_worker(pollset, &worker);
-    gpr_tls_set(&g_current_thread_worker, 0);
-  }
-  /* release wakeup fd to the local pool */
-  worker.wakeup_fd->next = pollset->local_wakeup_cache;
-  pollset->local_wakeup_cache = worker.wakeup_fd;
-  /* check shutdown conditions */
-  if (pollset->shutting_down) {
-    if (grpc_pollset_has_workers(pollset)) {
-      grpc_pollset_kick(pollset, NULL);
-    } else if (!pollset->called_shutdown && pollset->in_flight_cbs == 0) {
-      pollset->called_shutdown = 1;
-      gpr_mu_unlock(&pollset->mu);
-      finish_shutdown(exec_ctx, pollset);
-      grpc_exec_ctx_flush(exec_ctx);
-      /* Continuing to access pollset here is safe -- it is the caller's
-       * responsibility to not destroy when it has outstanding calls to
-       * grpc_pollset_work.
-       * TODO(dklempner): Can we refactor the shutdown logic to avoid this? */
-      gpr_mu_lock(&pollset->mu);
-    } else if (!grpc_closure_list_empty(pollset->idle_jobs)) {
-      grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-      gpr_mu_unlock(&pollset->mu);
-      grpc_exec_ctx_flush(exec_ctx);
-      gpr_mu_lock(&pollset->mu);
-    }
-  }
-  *worker_hdl = NULL;
-  GPR_TIMER_END("grpc_pollset_work", 0);
-}
-
-void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                           grpc_closure *closure) {
-  GPR_ASSERT(!pollset->shutting_down);
-  pollset->shutting_down = 1;
-  pollset->shutdown_done = closure;
-  grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-  if (!grpc_pollset_has_workers(pollset)) {
-    grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs, NULL);
-  }
-  if (!pollset->called_shutdown && pollset->in_flight_cbs == 0 &&
-      !grpc_pollset_has_workers(pollset)) {
-    pollset->called_shutdown = 1;
-    finish_shutdown(exec_ctx, pollset);
-  }
-}
-
-int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                         gpr_timespec now) {
-  gpr_timespec timeout;
-  static const int64_t max_spin_polling_us = 10;
-  if (gpr_time_cmp(deadline, gpr_inf_future(deadline.clock_type)) == 0) {
-    return -1;
-  }
-  if (gpr_time_cmp(deadline, gpr_time_add(now, gpr_time_from_micros(
-                                                   max_spin_polling_us,
-                                                   GPR_TIMESPAN))) <= 0) {
-    return 0;
-  }
-  timeout = gpr_time_sub(deadline, now);
-  return gpr_time_to_millis(gpr_time_add(
-      timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
-}
-
-/*
- * basic_pollset - a vtable that provides polling for zero or one file
- *                 descriptor via poll()
- */
-
-typedef struct grpc_unary_promote_args {
-  const grpc_pollset_vtable *original_vtable;
-  grpc_pollset *pollset;
-  grpc_fd *fd;
-  grpc_closure promotion_closure;
-} grpc_unary_promote_args;
-
-static void basic_do_promote(grpc_exec_ctx *exec_ctx, void *args,
-                             bool success) {
-  grpc_unary_promote_args *up_args = args;
-  const grpc_pollset_vtable *original_vtable = up_args->original_vtable;
-  grpc_pollset *pollset = up_args->pollset;
-  grpc_fd *fd = up_args->fd;
-
-  /*
-   * This is quite tricky. There are a number of cases to keep in mind here:
-   * 1. fd may have been orphaned
-   * 2. The pollset may no longer be a unary poller (and we can't let case #1
-   * leak to other pollset types!)
-   * 3. pollset's fd (which may have changed) may have been orphaned
-   * 4. The pollset may be shutting down.
-   */
-
-  gpr_mu_lock(&pollset->mu);
-  /* First we need to ensure that nobody is polling concurrently */
-  GPR_ASSERT(!grpc_pollset_has_workers(pollset));
-
-  gpr_free(up_args);
-  /* At this point the pollset may no longer be a unary poller. In that case
-   * we should just call the right add function and be done. */
-  /* TODO(klempner): If we're not careful this could cause infinite recursion.
-   * That's not a problem for now because empty_pollset has a trivial poller
-   * and we don't have any mechanism to unbecome multipoller. */
-  pollset->in_flight_cbs--;
-  if (pollset->shutting_down) {
-    /* We don't care about this pollset anymore. */
-    if (pollset->in_flight_cbs == 0 && !pollset->called_shutdown) {
-      pollset->called_shutdown = 1;
-      finish_shutdown(exec_ctx, pollset);
-    }
-  } else if (grpc_fd_is_orphaned(fd)) {
-    /* Don't try to add it to anything, we'll drop our ref on it below */
-  } else if (pollset->vtable != original_vtable) {
-    pollset->vtable->add_fd(exec_ctx, pollset, fd, 0);
-  } else if (fd != pollset->data.ptr) {
-    grpc_fd *fds[2];
-    fds[0] = pollset->data.ptr;
-    fds[1] = fd;
-
-    if (fds[0] && !grpc_fd_is_orphaned(fds[0])) {
-      grpc_platform_become_multipoller(exec_ctx, pollset, fds,
-                                       GPR_ARRAY_SIZE(fds));
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-    } else {
-      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
-       * unary poller */
-      /* Note that it is possible that fds[1] is also orphaned at this point.
-       * That's okay, we'll correct it at the next add or poll. */
-      if (fds[0]) GRPC_FD_UNREF(fds[0], "basicpoll");
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    }
-  }
-
-  gpr_mu_unlock(&pollset->mu);
-
-  /* Matching ref in basic_pollset_add_fd */
-  GRPC_FD_UNREF(fd, "basicpoll_add");
-}
-
-static void basic_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                 grpc_fd *fd, int and_unlock_pollset) {
-  grpc_unary_promote_args *up_args;
-  GPR_ASSERT(fd);
-  if (fd == pollset->data.ptr) goto exit;
-
-  if (!grpc_pollset_has_workers(pollset)) {
-    /* Fast path -- no in flight cbs */
-    /* TODO(klempner): Comment this out and fix any test failures or establish
-     * they are due to timing issues */
-    grpc_fd *fds[2];
-    fds[0] = pollset->data.ptr;
-    fds[1] = fd;
-
-    if (fds[0] == NULL) {
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    } else if (!grpc_fd_is_orphaned(fds[0])) {
-      grpc_platform_become_multipoller(exec_ctx, pollset, fds,
-                                       GPR_ARRAY_SIZE(fds));
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-    } else {
-      /* old fd is orphaned and we haven't cleaned it up until now, so remain a
-       * unary poller */
-      GRPC_FD_UNREF(fds[0], "basicpoll");
-      pollset->data.ptr = fd;
-      GRPC_FD_REF(fd, "basicpoll");
-    }
-    goto exit;
-  }
-
-  /* Now we need to promote. This needs to happen when we're not polling. Since
-   * this may be called from poll, the wait needs to happen asynchronously. */
-  GRPC_FD_REF(fd, "basicpoll_add");
-  pollset->in_flight_cbs++;
-  up_args = gpr_malloc(sizeof(*up_args));
-  up_args->fd = fd;
-  up_args->original_vtable = pollset->vtable;
-  up_args->pollset = pollset;
-  up_args->promotion_closure.cb = basic_do_promote;
-  up_args->promotion_closure.cb_arg = up_args;
-
-  grpc_closure_list_add(&pollset->idle_jobs, &up_args->promotion_closure, 1);
-  grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
-
-exit:
-  if (and_unlock_pollset) {
-    gpr_mu_unlock(&pollset->mu);
-  }
-}
-
-static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
-                                                grpc_pollset *pollset,
-                                                grpc_pollset_worker *worker,
-                                                gpr_timespec deadline,
-                                                gpr_timespec now) {
-#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
-#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
-
-  struct pollfd pfd[3];
-  grpc_fd *fd;
-  grpc_fd_watcher fd_watcher;
-  int timeout;
-  int r;
-  nfds_t nfds;
-
-  fd = pollset->data.ptr;
-  if (fd && grpc_fd_is_orphaned(fd)) {
-    GRPC_FD_UNREF(fd, "basicpoll");
-    fd = pollset->data.ptr = NULL;
-  }
-  timeout = grpc_poll_deadline_to_millis_timeout(deadline, now);
-  pfd[0].fd = GRPC_WAKEUP_FD_GET_READ_FD(&grpc_global_wakeup_fd);
-  pfd[0].events = POLLIN;
-  pfd[0].revents = 0;
-  pfd[1].fd = GRPC_WAKEUP_FD_GET_READ_FD(&worker->wakeup_fd->fd);
-  pfd[1].events = POLLIN;
-  pfd[1].revents = 0;
-  nfds = 2;
-  if (fd) {
-    pfd[2].fd = fd->fd;
-    pfd[2].revents = 0;
-    GRPC_FD_REF(fd, "basicpoll_begin");
-    gpr_mu_unlock(&pollset->mu);
-    pfd[2].events = (short)grpc_fd_begin_poll(fd, pollset, worker, POLLIN,
-                                              POLLOUT, &fd_watcher);
-    if (pfd[2].events != 0) {
-      nfds++;
-    }
-  } else {
-    gpr_mu_unlock(&pollset->mu);
-  }
-
-  /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
-     even going into the blocking annotation if possible */
-  /* poll fd count (argument 2) is shortened by one if we have no events
-     to poll on - such that it only includes the kicker */
-  GPR_TIMER_BEGIN("poll", 0);
-  GRPC_SCHEDULING_START_BLOCKING_REGION;
-  r = grpc_poll_function(pfd, nfds, timeout);
-  GRPC_SCHEDULING_END_BLOCKING_REGION;
-  GPR_TIMER_END("poll", 0);
-
-  if (r < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
-    }
-    if (fd) {
-      grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
-    }
-  } else if (r == 0) {
-    if (fd) {
-      grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
-    }
-  } else {
-    if (pfd[0].revents & POLLIN_CHECK) {
-      grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
-    }
-    if (pfd[1].revents & POLLIN_CHECK) {
-      grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd->fd);
-    }
-    if (nfds > 2) {
-      grpc_fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
-                       pfd[2].revents & POLLOUT_CHECK);
-    } else if (fd) {
-      grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
-    }
-  }
-
-  if (fd) {
-    GRPC_FD_UNREF(fd, "basicpoll_begin");
-  }
-}
-
-static void basic_pollset_destroy(grpc_pollset *pollset) {
-  if (pollset->data.ptr != NULL) {
-    GRPC_FD_UNREF(pollset->data.ptr, "basicpoll");
-    pollset->data.ptr = NULL;
-  }
-}
-
-static const grpc_pollset_vtable basic_pollset = {
-    basic_pollset_add_fd, basic_pollset_maybe_work_and_unlock,
-    basic_pollset_destroy, basic_pollset_destroy};
-
-static void become_basic_pollset(grpc_pollset *pollset, grpc_fd *fd_or_null) {
-  pollset->vtable = &basic_pollset;
-  pollset->data.ptr = fd_or_null;
-  if (fd_or_null != NULL) {
-    GRPC_FD_REF(fd_or_null, "basicpoll");
-  }
-}
-
-#endif /* GPR_POSIX_POLLSET */
diff --git a/src/core/lib/iomgr/pollset_posix.h b/src/core/lib/iomgr/pollset_posix.h
deleted file mode 100644
index 7d8e9fc279..0000000000
--- a/src/core/lib/iomgr/pollset_posix.h
+++ /dev/null
@@ -1,153 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_POSIX_H
-#define GRPC_CORE_LIB_IOMGR_POLLSET_POSIX_H
-
-#include <poll.h>
-
-#include <grpc/support/sync.h>
-
-#include "src/core/lib/iomgr/exec_ctx.h"
-#include "src/core/lib/iomgr/iomgr.h"
-#include "src/core/lib/iomgr/pollset.h"
-#include "src/core/lib/iomgr/wakeup_fd_posix.h"
-
-typedef struct grpc_pollset_vtable grpc_pollset_vtable;
-
-/* forward declare only in this file to avoid leaking impl details via
-   pollset.h; real users of grpc_fd should always include 'fd_posix.h' and not
-   use the struct tag */
-struct grpc_fd;
-
-typedef struct grpc_cached_wakeup_fd {
-  grpc_wakeup_fd fd;
-  struct grpc_cached_wakeup_fd *next;
-} grpc_cached_wakeup_fd;
-
-struct grpc_pollset_worker {
-  grpc_cached_wakeup_fd *wakeup_fd;
-  int reevaluate_polling_on_wakeup;
-  int kicked_specifically;
-  struct grpc_pollset_worker *next;
-  struct grpc_pollset_worker *prev;
-};
-
-struct grpc_pollset {
-  /* pollsets under posix can mutate representation as fds are added and
-     removed.
-     For example, we may choose a poll() based implementation on linux for
-     few fds, and an epoll() based implementation for many fds */
-  const grpc_pollset_vtable *vtable;
-  gpr_mu mu;
-  grpc_pollset_worker root_worker;
-  int in_flight_cbs;
-  int shutting_down;
-  int called_shutdown;
-  int kicked_without_pollers;
-  grpc_closure *shutdown_done;
-  grpc_closure_list idle_jobs;
-  union {
-    int fd;
-    void *ptr;
-  } data;
-  /* Local cache of eventfds for workers */
-  grpc_cached_wakeup_fd *local_wakeup_cache;
-};
-
-struct grpc_pollset_vtable {
-  void (*add_fd)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                 struct grpc_fd *fd, int and_unlock_pollset);
-  void (*maybe_work_and_unlock)(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                                grpc_pollset_worker *worker,
-                                gpr_timespec deadline, gpr_timespec now);
-  void (*finish_shutdown)(grpc_pollset *pollset);
-  void (*destroy)(grpc_pollset *pollset);
-};
-
-/* Add an fd to a pollset */
-void grpc_pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
-                         struct grpc_fd *fd);
-
-/* Returns the fd to listen on for kicks */
-int grpc_kick_read_fd(grpc_pollset *p);
-/* Call after polling has been kicked to leave the kicked state */
-void grpc_kick_drain(grpc_pollset *p);
-
-/* Convert a timespec to milliseconds:
-   - very small or negative poll times are clamped to zero to do a
-     non-blocking poll (which becomes spin polling)
-   - other small values are rounded up to one millisecond
-   - longer than a millisecond polls are rounded up to the next nearest
-     millisecond to avoid spinning
-   - infinite timeouts are converted to -1 */
-int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline,
-                                         gpr_timespec now);
-
-/* Allow kick to wakeup the currently polling worker */
-#define GRPC_POLLSET_CAN_KICK_SELF 1
-/* Force the wakee to repoll when awoken */
-#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
-/* As per grpc_pollset_kick, with an extended set of flags (defined above)
-   -- mostly for fd_posix's use. */
-void grpc_pollset_kick_ext(grpc_pollset *p,
-                           grpc_pollset_worker *specific_worker,
-                           uint32_t flags);
-
-/* turn a pollset into a multipoller: platform specific */
-typedef void (*grpc_platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
-                                                      grpc_pollset *pollset,
-                                                      struct grpc_fd **fds,
-                                                      size_t fd_count);
-extern grpc_platform_become_multipoller_type grpc_platform_become_multipoller;
-
-void grpc_poll_become_multipoller(grpc_exec_ctx *exec_ctx,
-                                  grpc_pollset *pollset, struct grpc_fd **fds,
-                                  size_t fd_count);
-
-/* Return 1 if the pollset has active threads in grpc_pollset_work (pollset must
- * be locked) */
-int grpc_pollset_has_workers(grpc_pollset *pollset);
-
-void grpc_remove_fd_from_all_epoll_sets(int fd);
-
-/* override to allow tests to hook poll() usage */
-/* NOTE: Any changes to grpc_poll_function must take place when the gRPC
-   is certainly not doing any polling anywhere.
-   Otherwise, there might be a race between changing the variable and actually
-   doing a polling operation */
-typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
-extern grpc_poll_function_type grpc_poll_function;
-extern grpc_wakeup_fd grpc_global_wakeup_fd;
-
-#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_POSIX_H */
diff --git a/src/core/lib/iomgr/pollset_set.h b/src/core/lib/iomgr/pollset_set.h
index fb29d692d7..34bb728c41 100644
--- a/src/core/lib/iomgr/pollset_set.h
+++ b/src/core/lib/iomgr/pollset_set.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/pollset_set_posix.c b/src/core/lib/iomgr/pollset_set_posix.c
deleted file mode 100644
index d6142f9b6b..0000000000
--- a/src/core/lib/iomgr/pollset_set_posix.c
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_POSIX_SOCKET
-
-#include <stdlib.h>
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/iomgr/pollset_posix.h"
-#include "src/core/lib/iomgr/pollset_set_posix.h"
-
-struct grpc_pollset_set {
-  gpr_mu mu;
-
-  size_t pollset_count;
-  size_t pollset_capacity;
-  grpc_pollset **pollsets;
-
-  size_t pollset_set_count;
-  size_t pollset_set_capacity;
-  struct grpc_pollset_set **pollset_sets;
-
-  size_t fd_count;
-  size_t fd_capacity;
-  grpc_fd **fds;
-};
-
-grpc_pollset_set *grpc_pollset_set_create(void) {
-  grpc_pollset_set *pollset_set = gpr_malloc(sizeof(*pollset_set));
-  memset(pollset_set, 0, sizeof(*pollset_set));
-  gpr_mu_init(&pollset_set->mu);
-  return pollset_set;
-}
-
-void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set) {
-  size_t i;
-  gpr_mu_destroy(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-  }
-  gpr_free(pollset_set->pollsets);
-  gpr_free(pollset_set->pollset_sets);
-  gpr_free(pollset_set->fds);
-  gpr_free(pollset_set);
-}
-
-void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
-                                  grpc_pollset_set *pollset_set,
-                                  grpc_pollset *pollset) {
-  size_t i, j;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->pollset_count == pollset_set->pollset_capacity) {
-    pollset_set->pollset_capacity =
-        GPR_MAX(8, 2 * pollset_set->pollset_capacity);
-    pollset_set->pollsets =
-        gpr_realloc(pollset_set->pollsets, pollset_set->pollset_capacity *
-                                               sizeof(*pollset_set->pollsets));
-  }
-  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
-  for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
-    if (grpc_fd_is_orphaned(pollset_set->fds[i])) {
-      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
-    } else {
-      grpc_pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
-      pollset_set->fds[j++] = pollset_set->fds[i];
-    }
-  }
-  pollset_set->fd_count = j;
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
-                                  grpc_pollset_set *pollset_set,
-                                  grpc_pollset *pollset) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    if (pollset_set->pollsets[i] == pollset) {
-      pollset_set->pollset_count--;
-      GPR_SWAP(grpc_pollset *, pollset_set->pollsets[i],
-               pollset_set->pollsets[pollset_set->pollset_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
-                                      grpc_pollset_set *bag,
-                                      grpc_pollset_set *item) {
-  size_t i, j;
-  gpr_mu_lock(&bag->mu);
-  if (bag->pollset_set_count == bag->pollset_set_capacity) {
-    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
-    bag->pollset_sets =
-        gpr_realloc(bag->pollset_sets,
-                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
-  }
-  bag->pollset_sets[bag->pollset_set_count++] = item;
-  for (i = 0, j = 0; i < bag->fd_count; i++) {
-    if (grpc_fd_is_orphaned(bag->fds[i])) {
-      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
-    } else {
-      grpc_pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
-      bag->fds[j++] = bag->fds[i];
-    }
-  }
-  bag->fd_count = j;
-  gpr_mu_unlock(&bag->mu);
-}
-
-void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
-                                      grpc_pollset_set *bag,
-                                      grpc_pollset_set *item) {
-  size_t i;
-  gpr_mu_lock(&bag->mu);
-  for (i = 0; i < bag->pollset_set_count; i++) {
-    if (bag->pollset_sets[i] == item) {
-      bag->pollset_set_count--;
-      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
-               bag->pollset_sets[bag->pollset_set_count]);
-      break;
-    }
-  }
-  gpr_mu_unlock(&bag->mu);
-}
-
-void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                             grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  if (pollset_set->fd_count == pollset_set->fd_capacity) {
-    pollset_set->fd_capacity = GPR_MAX(8, 2 * pollset_set->fd_capacity);
-    pollset_set->fds = gpr_realloc(
-        pollset_set->fds, pollset_set->fd_capacity * sizeof(*pollset_set->fds));
-  }
-  GRPC_FD_REF(fd, "pollset_set");
-  pollset_set->fds[pollset_set->fd_count++] = fd;
-  for (i = 0; i < pollset_set->pollset_count; i++) {
-    grpc_pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    grpc_pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
-                             grpc_pollset_set *pollset_set, grpc_fd *fd) {
-  size_t i;
-  gpr_mu_lock(&pollset_set->mu);
-  for (i = 0; i < pollset_set->fd_count; i++) {
-    if (pollset_set->fds[i] == fd) {
-      pollset_set->fd_count--;
-      GPR_SWAP(grpc_fd *, pollset_set->fds[i],
-               pollset_set->fds[pollset_set->fd_count]);
-      GRPC_FD_UNREF(fd, "pollset_set");
-      break;
-    }
-  }
-  for (i = 0; i < pollset_set->pollset_set_count; i++) {
-    grpc_pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
-  }
-  gpr_mu_unlock(&pollset_set->mu);
-}
-
-#endif /* GPR_POSIX_SOCKET */
diff --git a/src/core/lib/iomgr/pollset_set_posix.h b/src/core/lib/iomgr/pollset_set_posix.h
deleted file mode 100644
index 4e6b063c6f..0000000000
--- a/src/core/lib/iomgr/pollset_set_posix.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_IOMGR_POLLSET_SET_POSIX_H
-#define GRPC_CORE_LIB_IOMGR_POLLSET_SET_POSIX_H
-
-#include "src/core/lib/iomgr/fd_posix.h"
-#include "src/core/lib/iomgr/pollset_set.h"
-
-void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
-                             grpc_pollset_set *pollset_set, grpc_fd *fd);
-void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
-                             grpc_pollset_set *pollset_set, grpc_fd *fd);
-
-#endif /* GRPC_CORE_LIB_IOMGR_POLLSET_SET_POSIX_H */
diff --git a/src/core/lib/iomgr/pollset_set_windows.c b/src/core/lib/iomgr/pollset_set_windows.c
index 0b14e446ae..89f60b92fb 100644
--- a/src/core/lib/iomgr/pollset_set_windows.c
+++ b/src/core/lib/iomgr/pollset_set_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,7 +37,7 @@
 
 #include "src/core/lib/iomgr/pollset_set_windows.h"
 
-grpc_pollset_set* grpc_pollset_set_create(pollset_set) { return NULL; }
+grpc_pollset_set* grpc_pollset_set_create(void) { return NULL; }
 
 void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {}
 
diff --git a/src/core/lib/iomgr/pollset_set_windows.h b/src/core/lib/iomgr/pollset_set_windows.h
index 7c2cea23de..0356749b15 100644
--- a/src/core/lib/iomgr/pollset_set_windows.h
+++ b/src/core/lib/iomgr/pollset_set_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/pollset_windows.c b/src/core/lib/iomgr/pollset_windows.c
index 6b339127a8..bff5c586f8 100644
--- a/src/core/lib/iomgr/pollset_windows.c
+++ b/src/core/lib/iomgr/pollset_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,7 +47,7 @@ gpr_mu grpc_polling_mu;
 static grpc_pollset_worker *g_active_poller;
 static grpc_pollset_worker g_global_root_worker;
 
-void grpc_pollset_global_init() {
+void grpc_pollset_global_init(void) {
   gpr_mu_init(&grpc_polling_mu);
   g_active_poller = NULL;
   g_global_root_worker.links[GRPC_POLLSET_WORKER_LINK_GLOBAL].next =
@@ -55,7 +55,7 @@ void grpc_pollset_global_init() {
           &g_global_root_worker;
 }
 
-void grpc_pollset_global_shutdown() { gpr_mu_destroy(&grpc_polling_mu); }
+void grpc_pollset_global_shutdown(void) { gpr_mu_destroy(&grpc_polling_mu); }
 
 static void remove_worker(grpc_pollset_worker *worker,
                           grpc_pollset_worker_link_type type) {
diff --git a/src/core/lib/iomgr/pollset_windows.h b/src/core/lib/iomgr/pollset_windows.h
index fa9553ffea..2642013afc 100644
--- a/src/core/lib/iomgr/pollset_windows.h
+++ b/src/core/lib/iomgr/pollset_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -72,4 +72,7 @@ struct grpc_pollset {
   grpc_closure *on_shutdown;
 };
 
+void grpc_pollset_global_init(void);
+void grpc_pollset_global_shutdown(void);
+
 #endif /* GRPC_CORE_LIB_IOMGR_POLLSET_WINDOWS_H */
diff --git a/src/core/lib/iomgr/resolve_address.h b/src/core/lib/iomgr/resolve_address.h
index f748288685..ecc06340a3 100644
--- a/src/core/lib/iomgr/resolve_address.h
+++ b/src/core/lib/iomgr/resolve_address.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/resolve_address_posix.c b/src/core/lib/iomgr/resolve_address_posix.c
index ebecb39c16..b9d3bbdb89 100644
--- a/src/core/lib/iomgr/resolve_address_posix.c
+++ b/src/core/lib/iomgr/resolve_address_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/resolve_address_windows.c b/src/core/lib/iomgr/resolve_address_windows.c
index bde1f1b7f7..82763d11f4 100644
--- a/src/core/lib/iomgr/resolve_address_windows.c
+++ b/src/core/lib/iomgr/resolve_address_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/sockaddr.h b/src/core/lib/iomgr/sockaddr.h
index 66a930ee6a..891a2f094f 100644
--- a/src/core/lib/iomgr/sockaddr.h
+++ b/src/core/lib/iomgr/sockaddr.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/sockaddr_posix.h b/src/core/lib/iomgr/sockaddr_posix.h
index 79a7467c5d..b150de42f7 100644
--- a/src/core/lib/iomgr/sockaddr_posix.h
+++ b/src/core/lib/iomgr/sockaddr_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/sockaddr_utils.h b/src/core/lib/iomgr/sockaddr_utils.h
index 20a3e3bec3..9f81992e6b 100644
--- a/src/core/lib/iomgr/sockaddr_utils.h
+++ b/src/core/lib/iomgr/sockaddr_utils.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/sockaddr_win32.h b/src/core/lib/iomgr/sockaddr_win32.h
index 2dd7111240..02aeae7619 100644
--- a/src/core/lib/iomgr/sockaddr_win32.h
+++ b/src/core/lib/iomgr/sockaddr_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.c b/src/core/lib/iomgr/socket_utils_common_posix.c
index 9dbc2784e4..fa83ceef30 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.c
+++ b/src/core/lib/iomgr/socket_utils_common_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -89,6 +89,28 @@ int grpc_set_socket_no_sigpipe_if_possible(int fd) {
 #endif
 }
 
+int grpc_set_socket_ip_pktinfo_if_possible(int fd) {
+#ifdef GPR_HAVE_IP_PKTINFO
+  int get_local_ip = 1;
+  return 0 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &get_local_ip,
+                         sizeof(get_local_ip));
+#else
+  (void)fd;
+  return 1;
+#endif
+}
+
+int grpc_set_socket_ipv6_recvpktinfo_if_possible(int fd) {
+#ifdef GPR_HAVE_IPV6_RECVPKTINFO
+  int get_local_ip = 1;
+  return 0 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &get_local_ip,
+                         sizeof(get_local_ip));
+#else
+  (void)fd;
+  return 1;
+#endif
+}
+
 /* set a socket to close on exec */
 int grpc_set_socket_cloexec(int fd, int close_on_exec) {
   int oldflags = fcntl(fd, F_GETFD, 0);
diff --git a/src/core/lib/iomgr/socket_utils_linux.c b/src/core/lib/iomgr/socket_utils_linux.c
index e7dfe892ca..144e3110c8 100644
--- a/src/core/lib/iomgr/socket_utils_linux.c
+++ b/src/core/lib/iomgr/socket_utils_linux.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/socket_utils_posix.c b/src/core/lib/iomgr/socket_utils_posix.c
index b2fa00c5c1..57ae64c103 100644
--- a/src/core/lib/iomgr/socket_utils_posix.c
+++ b/src/core/lib/iomgr/socket_utils_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/socket_utils_posix.h b/src/core/lib/iomgr/socket_utils_posix.h
index 063f298d72..a8f6e5e658 100644
--- a/src/core/lib/iomgr/socket_utils_posix.h
+++ b/src/core/lib/iomgr/socket_utils_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -68,6 +68,16 @@ int grpc_ipv6_loopback_available(void);
    If SO_NO_SIGPIPE is not available, returns 1. */
 int grpc_set_socket_no_sigpipe_if_possible(int fd);
 
+/* Tries to set IP_PKTINFO if available on this platform.
+   Returns 1 on success, 0 on failure.
+   If IP_PKTINFO is not available, returns 1. */
+int grpc_set_socket_ip_pktinfo_if_possible(int fd);
+
+/* Tries to set IPV6_RECVPKTINFO if available on this platform.
+   Returns 1 on success, 0 on failure.
+   If IPV6_RECVPKTINFO is not available, returns 1. */
+int grpc_set_socket_ipv6_recvpktinfo_if_possible(int fd);
+
 /* An enum to keep track of IPv4/IPv6 socket modes.
 
    Currently, this information is only used when a socket is first created, but
diff --git a/src/core/lib/iomgr/socket_windows.c b/src/core/lib/iomgr/socket_windows.c
index 1023a6d4f8..ebd77e0372 100644
--- a/src/core/lib/iomgr/socket_windows.c
+++ b/src/core/lib/iomgr/socket_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/socket_windows.h b/src/core/lib/iomgr/socket_windows.h
index 74447896c9..73c4384987 100644
--- a/src/core/lib/iomgr/socket_windows.h
+++ b/src/core/lib/iomgr/socket_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/tcp_client.h b/src/core/lib/iomgr/tcp_client.h
index 6bbe26445a..a07e0b9f0c 100644
--- a/src/core/lib/iomgr/tcp_client.h
+++ b/src/core/lib/iomgr/tcp_client.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/tcp_client_posix.c b/src/core/lib/iomgr/tcp_client_posix.c
index b8ef643298..6430cb629f 100644
--- a/src/core/lib/iomgr/tcp_client_posix.c
+++ b/src/core/lib/iomgr/tcp_client_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,9 +47,8 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 
+#include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/iomgr_posix.h"
-#include "src/core/lib/iomgr/pollset_posix.h"
-#include "src/core/lib/iomgr/pollset_set_posix.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
 #include "src/core/lib/iomgr/tcp_posix.h"
@@ -140,7 +139,8 @@ static void on_writable(grpc_exec_ctx *exec_ctx, void *acp, bool success) {
   if (success) {
     do {
       so_error_size = sizeof(so_error);
-      err = getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &so_error, &so_error_size);
+      err = getsockopt(grpc_fd_wrapped_fd(fd), SOL_SOCKET, SO_ERROR, &so_error,
+                       &so_error_size);
     } while (err < 0 && errno == EINTR);
     if (err < 0) {
       gpr_log(GPR_ERROR, "failed to connect to '%s': getsockopt(ERROR): %s",
diff --git a/src/core/lib/iomgr/tcp_client_windows.c b/src/core/lib/iomgr/tcp_client_windows.c
index 86b8d58975..7d78beb15a 100644
--- a/src/core/lib/iomgr/tcp_client_windows.c
+++ b/src/core/lib/iomgr/tcp_client_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -103,7 +103,8 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *acp, bool from_iocp) {
     GPR_ASSERT(transfered_bytes == 0);
     if (!wsa_success) {
       char *utf8_message = gpr_format_message(WSAGetLastError());
-      gpr_log(GPR_ERROR, "on_connect error: %s", utf8_message);
+      gpr_log(GPR_ERROR, "on_connect error connecting to '%s': %s",
+              ac->addr_name, utf8_message);
       gpr_free(utf8_message);
     } else {
       *ep = grpc_tcp_create(ac->socket, ac->addr_name);
diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c
index 1898d96901..7210aef5d5 100644
--- a/src/core/lib/iomgr/tcp_posix.c
+++ b/src/core/lib/iomgr/tcp_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,8 +52,7 @@
 #include <grpc/support/time.h>
 
 #include "src/core/lib/debug/trace.h"
-#include "src/core/lib/iomgr/pollset_posix.h"
-#include "src/core/lib/iomgr/pollset_set_posix.h"
+#include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/string.h"
 
@@ -454,7 +453,7 @@ grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd, size_t slice_size,
   grpc_tcp *tcp = (grpc_tcp *)gpr_malloc(sizeof(grpc_tcp));
   tcp->base.vtable = &vtable;
   tcp->peer_string = gpr_strdup(peer_string);
-  tcp->fd = em_fd->fd;
+  tcp->fd = grpc_fd_wrapped_fd(em_fd);
   tcp->read_cb = NULL;
   tcp->write_cb = NULL;
   tcp->release_fd_cb = NULL;
diff --git a/src/core/lib/iomgr/tcp_posix.h b/src/core/lib/iomgr/tcp_posix.h
index 09c4436f1f..99125836d6 100644
--- a/src/core/lib/iomgr/tcp_posix.h
+++ b/src/core/lib/iomgr/tcp_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -45,7 +45,7 @@
 */
 
 #include "src/core/lib/iomgr/endpoint.h"
-#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/ev_posix.h"
 
 #define GRPC_TCP_DEFAULT_READ_SLICE_SIZE 8192
 
diff --git a/src/core/lib/iomgr/tcp_server.h b/src/core/lib/iomgr/tcp_server.h
index 81edb61997..99b9f29729 100644
--- a/src/core/lib/iomgr/tcp_server.h
+++ b/src/core/lib/iomgr/tcp_server.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index e9c7f4ef5c..aaeb384f6e 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,7 +59,6 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
-#include "src/core/lib/iomgr/pollset_posix.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
diff --git a/src/core/lib/iomgr/tcp_server_windows.c b/src/core/lib/iomgr/tcp_server_windows.c
index 3db92aa41a..6940dec7b0 100644
--- a/src/core/lib/iomgr/tcp_server_windows.c
+++ b/src/core/lib/iomgr/tcp_server_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/tcp_windows.c b/src/core/lib/iomgr/tcp_windows.c
index c1ce725f2c..7ee689a7e4 100644
--- a/src/core/lib/iomgr/tcp_windows.c
+++ b/src/core/lib/iomgr/tcp_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/tcp_windows.h b/src/core/lib/iomgr/tcp_windows.h
index 7a9ebd85eb..a2f58eddd5 100644
--- a/src/core/lib/iomgr/tcp_windows.h
+++ b/src/core/lib/iomgr/tcp_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/time_averaged_stats.c b/src/core/lib/iomgr/time_averaged_stats.c
index f24d68087e..da9cae6f28 100644
--- a/src/core/lib/iomgr/time_averaged_stats.c
+++ b/src/core/lib/iomgr/time_averaged_stats.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/time_averaged_stats.h b/src/core/lib/iomgr/time_averaged_stats.h
index 4a662e17ec..284b31f94a 100644
--- a/src/core/lib/iomgr/time_averaged_stats.h
+++ b/src/core/lib/iomgr/time_averaged_stats.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/timer.c b/src/core/lib/iomgr/timer.c
index 4748f9b270..713f15b69e 100644
--- a/src/core/lib/iomgr/timer.c
+++ b/src/core/lib/iomgr/timer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/timer.h b/src/core/lib/iomgr/timer.h
index 54f301c5ed..a825d2a28b 100644
--- a/src/core/lib/iomgr/timer.h
+++ b/src/core/lib/iomgr/timer.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/timer_heap.c b/src/core/lib/iomgr/timer_heap.c
index d43b6ccf75..2ad9bb9cd2 100644
--- a/src/core/lib/iomgr/timer_heap.c
+++ b/src/core/lib/iomgr/timer_heap.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/timer_heap.h b/src/core/lib/iomgr/timer_heap.h
index d5112cf0de..576c20e09a 100644
--- a/src/core/lib/iomgr/timer_heap.h
+++ b/src/core/lib/iomgr/timer_heap.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/udp_server.c b/src/core/lib/iomgr/udp_server.c
index 06f5d3dc8b..24131179af 100644
--- a/src/core/lib/iomgr/udp_server.c
+++ b/src/core/lib/iomgr/udp_server.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -60,12 +60,10 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
-#include "src/core/lib/iomgr/fd_posix.h"
-#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/ev_posix.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
-#include "src/core/lib/iomgr/unix_sockets_posix.h"
 #include "src/core/lib/support/string.h"
 
 #define INIT_PORT_CAP 2
@@ -208,8 +206,6 @@ static int prepare_socket(int fd, const struct sockaddr *addr,
                           size_t addr_len) {
   struct sockaddr_storage sockname_temp;
   socklen_t sockname_len;
-  int get_local_ip;
-  int rc;
 
   if (fd < 0) {
     goto error;
@@ -220,14 +216,9 @@ static int prepare_socket(int fd, const struct sockaddr *addr,
             strerror(errno));
   }
 
-  get_local_ip = 1;
-  rc = setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &get_local_ip,
-                  sizeof(get_local_ip));
-  if (rc == 0 && addr->sa_family == AF_INET6) {
-#if !defined(__APPLE__)
-    rc = setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &get_local_ip,
-                    sizeof(get_local_ip));
-#endif
+  if (grpc_set_socket_ip_pktinfo_if_possible(fd) &&
+      addr->sa_family == AF_INET6) {
+    grpc_set_socket_ipv6_recvpktinfo_if_possible(fd);
   }
 
   GPR_ASSERT(addr_len < ~(socklen_t)0);
diff --git a/src/core/lib/iomgr/udp_server.h b/src/core/lib/iomgr/udp_server.h
index 316845ad66..d8cf957a22 100644
--- a/src/core/lib/iomgr/udp_server.h
+++ b/src/core/lib/iomgr/udp_server.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,7 +35,7 @@
 #define GRPC_CORE_LIB_IOMGR_UDP_SERVER_H
 
 #include "src/core/lib/iomgr/endpoint.h"
-#include "src/core/lib/iomgr/fd_posix.h"
+#include "src/core/lib/iomgr/ev_posix.h"
 
 /* Forward decl of struct grpc_server */
 /* This is not typedef'ed to avoid a typedef-redefinition error */
diff --git a/src/core/lib/iomgr/unix_sockets_posix_noop.c b/src/core/lib/iomgr/unix_sockets_posix_noop.c
index 06f6ee05e7..43e006e15e 100644
--- a/src/core/lib/iomgr/unix_sockets_posix_noop.c
+++ b/src/core/lib/iomgr/unix_sockets_posix_noop.c
@@ -35,7 +35,12 @@
 
 #ifndef GPR_HAVE_UNIX_SOCKET
 
-void grpc_create_socketpair_if_unix(int sv[2]) {}
+void grpc_create_socketpair_if_unix(int sv[2]) {
+  // TODO: Either implement this for the non-Unix socket case or make
+  // sure that it is never called in any such case. Until then, leave an
+  // assertion to notify if this gets called inadvertently
+  GPR_ASSERT(0);
+}
 
 grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name) {
   return NULL;
diff --git a/src/core/lib/iomgr/wakeup_fd_eventfd.c b/src/core/lib/iomgr/wakeup_fd_eventfd.c
index 41ded0ca4d..8a772add13 100644
--- a/src/core/lib/iomgr/wakeup_fd_eventfd.c
+++ b/src/core/lib/iomgr/wakeup_fd_eventfd.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/wakeup_fd_nospecial.c b/src/core/lib/iomgr/wakeup_fd_nospecial.c
index 39defa65c6..cb2f707dc5 100644
--- a/src/core/lib/iomgr/wakeup_fd_nospecial.c
+++ b/src/core/lib/iomgr/wakeup_fd_nospecial.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/wakeup_fd_pipe.c b/src/core/lib/iomgr/wakeup_fd_pipe.c
index 820919e4dd..e9b9a0119f 100644
--- a/src/core/lib/iomgr/wakeup_fd_pipe.c
+++ b/src/core/lib/iomgr/wakeup_fd_pipe.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/wakeup_fd_pipe.h b/src/core/lib/iomgr/wakeup_fd_pipe.h
index bbdb1fc448..8972efc270 100644
--- a/src/core/lib/iomgr/wakeup_fd_pipe.h
+++ b/src/core/lib/iomgr/wakeup_fd_pipe.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/wakeup_fd_posix.c b/src/core/lib/iomgr/wakeup_fd_posix.c
index c4d174fb34..525369c356 100644
--- a/src/core/lib/iomgr/wakeup_fd_posix.c
+++ b/src/core/lib/iomgr/wakeup_fd_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/wakeup_fd_posix.h b/src/core/lib/iomgr/wakeup_fd_posix.h
index 20988d5fd3..6b069c1837 100644
--- a/src/core/lib/iomgr/wakeup_fd_posix.h
+++ b/src/core/lib/iomgr/wakeup_fd_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/workqueue.h b/src/core/lib/iomgr/workqueue.h
index 9c420c57de..3e2b223670 100644
--- a/src/core/lib/iomgr/workqueue.h
+++ b/src/core/lib/iomgr/workqueue.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/workqueue_posix.c b/src/core/lib/iomgr/workqueue_posix.c
index 76830ef12d..80e7a0b206 100644
--- a/src/core/lib/iomgr/workqueue_posix.c
+++ b/src/core/lib/iomgr/workqueue_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,8 +43,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
 
-#include "src/core/lib/iomgr/fd_posix.h"
-#include "src/core/lib/iomgr/pollset_posix.h"
+#include "src/core/lib/iomgr/ev_posix.h"
 
 static void on_readable(grpc_exec_ctx *exec_ctx, void *arg, bool success);
 
diff --git a/src/core/lib/iomgr/workqueue_posix.h b/src/core/lib/iomgr/workqueue_posix.h
index 956de8fb27..dcb47e7b59 100644
--- a/src/core/lib/iomgr/workqueue_posix.h
+++ b/src/core/lib/iomgr/workqueue_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/workqueue_windows.c b/src/core/lib/iomgr/workqueue_windows.c
index 6697f93498..c3c0446a57 100644
--- a/src/core/lib/iomgr/workqueue_windows.c
+++ b/src/core/lib/iomgr/workqueue_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/iomgr/workqueue_windows.h b/src/core/lib/iomgr/workqueue_windows.h
index 8e6980b6d9..e5d59130bb 100644
--- a/src/core/lib/iomgr/workqueue_windows.h
+++ b/src/core/lib/iomgr/workqueue_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json.c b/src/core/lib/json/json.c
index 9793045d91..5b583a1f2e 100644
--- a/src/core/lib/json/json.c
+++ b/src/core/lib/json/json.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json.h b/src/core/lib/json/json.h
index 41d87dd5ce..681df4bb77 100644
--- a/src/core/lib/json/json.h
+++ b/src/core/lib/json/json.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json_common.h b/src/core/lib/json/json_common.h
index ce980040f8..fa13088be9 100644
--- a/src/core/lib/json/json_common.h
+++ b/src/core/lib/json/json_common.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json_reader.c b/src/core/lib/json/json_reader.c
index 0807f029ce..bc04bccc65 100644
--- a/src/core/lib/json/json_reader.c
+++ b/src/core/lib/json/json_reader.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -180,6 +180,13 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader *reader) {
           case GRPC_JSON_STATE_VALUE_NUMBER_WITH_DECIMAL:
           case GRPC_JSON_STATE_VALUE_NUMBER_ZERO:
           case GRPC_JSON_STATE_VALUE_NUMBER_EPM:
+            if (reader->depth == 0) {
+              return GRPC_JSON_PARSE_ERROR;
+            } else if ((c == '}') && !reader->in_object) {
+              return GRPC_JSON_PARSE_ERROR;
+            } else if ((c == ']') && !reader->in_array) {
+              return GRPC_JSON_PARSE_ERROR;
+            }
             success = (uint32_t)json_reader_set_number(reader);
             if (!success) return GRPC_JSON_PARSE_ERROR;
             json_reader_string_clear(reader);
@@ -195,8 +202,10 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader *reader) {
               }
               if (reader->in_object) {
                 reader->state = GRPC_JSON_STATE_OBJECT_KEY_BEGIN;
-              } else {
+              } else if (reader->in_array) {
                 reader->state = GRPC_JSON_STATE_VALUE_BEGIN;
+              } else {
+                return GRPC_JSON_PARSE_ERROR;
               }
             } else {
               if (reader->depth-- == 0) return GRPC_JSON_PARSE_ERROR;
@@ -280,13 +289,14 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader *reader) {
             break;
 
           case GRPC_JSON_STATE_OBJECT_KEY_STRING:
-            GPR_ASSERT(reader->unicode_high_surrogate == 0);
+            if (reader->unicode_high_surrogate != 0)
+              return GRPC_JSON_PARSE_ERROR;
             if (c == '"') {
               reader->state = GRPC_JSON_STATE_OBJECT_KEY_END;
               json_reader_set_key(reader);
               json_reader_string_clear(reader);
             } else {
-              if (c <= 0x001f) return GRPC_JSON_PARSE_ERROR;
+              if (c < 32) return GRPC_JSON_PARSE_ERROR;
               json_reader_string_add_char(reader, c);
             }
             break;
@@ -362,6 +372,8 @@ grpc_json_reader_status grpc_json_reader_run(grpc_json_reader *reader) {
                 reader->in_object = 0;
                 reader->in_array = 1;
                 break;
+              default:
+                return GRPC_JSON_PARSE_ERROR;
             }
             break;
 
diff --git a/src/core/lib/json/json_reader.h b/src/core/lib/json/json_reader.h
index 37a838889d..e0322c5507 100644
--- a/src/core/lib/json/json_reader.h
+++ b/src/core/lib/json/json_reader.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json_string.c b/src/core/lib/json/json_string.c
index 8e6f1253dc..4af7ee7179 100644
--- a/src/core/lib/json/json_string.c
+++ b/src/core/lib/json/json_string.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json_writer.c b/src/core/lib/json/json_writer.c
index d614a72fc4..b6a17f41e8 100644
--- a/src/core/lib/json/json_writer.c
+++ b/src/core/lib/json/json_writer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/json/json_writer.h b/src/core/lib/json/json_writer.h
index f90e79cd74..faeb41d031 100644
--- a/src/core/lib/json/json_writer.h
+++ b/src/core/lib/json/json_writer.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/profiling/basic_timers.c b/src/core/lib/profiling/basic_timers.c
index 2b17cb2dc8..0a4ae3057a 100644
--- a/src/core/lib/profiling/basic_timers.c
+++ b/src/core/lib/profiling/basic_timers.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/profiling/stap_timers.c b/src/core/lib/profiling/stap_timers.c
index f55c1a569a..25e38e6d99 100644
--- a/src/core/lib/profiling/stap_timers.c
+++ b/src/core/lib/profiling/stap_timers.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/profiling/timers.h b/src/core/lib/profiling/timers.h
index 1303593ffb..c8567e8137 100644
--- a/src/core/lib/profiling/timers.h
+++ b/src/core/lib/profiling/timers.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/auth_filters.h b/src/core/lib/security/auth_filters.h
index 162b60e2c8..7fb56c3f3a 100644
--- a/src/core/lib/security/auth_filters.h
+++ b/src/core/lib/security/auth_filters.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/b64.c b/src/core/lib/security/b64.c
index 1d3879534c..87f0e05280 100644
--- a/src/core/lib/security/b64.c
+++ b/src/core/lib/security/b64.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/b64.h b/src/core/lib/security/b64.h
index 0bf372a1e7..c515e7af2c 100644
--- a/src/core/lib/security/b64.h
+++ b/src/core/lib/security/b64.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/client_auth_filter.c b/src/core/lib/security/client_auth_filter.c
index b9e5bf0339..943b1da85c 100644
--- a/src/core/lib/security/client_auth_filter.c
+++ b/src/core/lib/security/client_auth_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -172,7 +172,7 @@ static void send_security_metadata(grpc_exec_ctx *exec_ctx,
     calld->creds = grpc_composite_call_credentials_create(channel_call_creds,
                                                           ctx->creds, NULL);
     if (calld->creds == NULL) {
-      bubble_up_error(exec_ctx, elem, GRPC_STATUS_INVALID_ARGUMENT,
+      bubble_up_error(exec_ctx, elem, GRPC_STATUS_INTERNAL,
                       "Incompatible credentials set on channel and call.");
       return;
     }
@@ -201,7 +201,7 @@ static void on_host_checked(grpc_exec_ctx *exec_ctx, void *user_data,
     char *error_msg;
     gpr_asprintf(&error_msg, "Invalid host %s set in :authority metadata.",
                  grpc_mdstr_as_c_string(calld->host));
-    bubble_up_error(exec_ctx, elem, GRPC_STATUS_INVALID_ARGUMENT, error_msg);
+    bubble_up_error(exec_ctx, elem, GRPC_STATUS_INTERNAL, error_msg);
     gpr_free(error_msg);
   }
 }
diff --git a/src/core/lib/security/credentials.c b/src/core/lib/security/credentials.c
index 99a07e5c13..2c7d31519c 100644
--- a/src/core/lib/security/credentials.c
+++ b/src/core/lib/security/credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/credentials.h b/src/core/lib/security/credentials.h
index 7168b98942..0373ceaa3f 100644
--- a/src/core/lib/security/credentials.h
+++ b/src/core/lib/security/credentials.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/credentials_metadata.c b/src/core/lib/security/credentials_metadata.c
index c3bfcb11b5..bd00194278 100644
--- a/src/core/lib/security/credentials_metadata.c
+++ b/src/core/lib/security/credentials_metadata.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/credentials_posix.c b/src/core/lib/security/credentials_posix.c
index b758cd0a1a..a07de182a0 100644
--- a/src/core/lib/security/credentials_posix.c
+++ b/src/core/lib/security/credentials_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/credentials_win32.c b/src/core/lib/security/credentials_win32.c
index a225ab0d7d..d29847af38 100644
--- a/src/core/lib/security/credentials_win32.c
+++ b/src/core/lib/security/credentials_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/google_default_credentials.c b/src/core/lib/security/google_default_credentials.c
index 5c342288cc..236f1d7fa7 100644
--- a/src/core/lib/security/google_default_credentials.c
+++ b/src/core/lib/security/google_default_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/handshake.c b/src/core/lib/security/handshake.c
index adb6d7fe4e..d5fe0c7b7d 100644
--- a/src/core/lib/security/handshake.c
+++ b/src/core/lib/security/handshake.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/handshake.h b/src/core/lib/security/handshake.h
index b5d7bb3282..f34476ed49 100644
--- a/src/core/lib/security/handshake.h
+++ b/src/core/lib/security/handshake.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/json_token.c b/src/core/lib/security/json_token.c
index 97054286d9..d5bc2c8d60 100644
--- a/src/core/lib/security/json_token.c
+++ b/src/core/lib/security/json_token.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/json_token.h b/src/core/lib/security/json_token.h
index 376fb03875..123fa652fd 100644
--- a/src/core/lib/security/json_token.h
+++ b/src/core/lib/security/json_token.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/jwt_verifier.c b/src/core/lib/security/jwt_verifier.c
index 460b92f9a0..0e012294de 100644
--- a/src/core/lib/security/jwt_verifier.c
+++ b/src/core/lib/security/jwt_verifier.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/jwt_verifier.h b/src/core/lib/security/jwt_verifier.h
index 28a9eff048..98a4f6b116 100644
--- a/src/core/lib/security/jwt_verifier.h
+++ b/src/core/lib/security/jwt_verifier.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/secure_endpoint.c b/src/core/lib/security/secure_endpoint.c
index e233b081ef..27b0e98910 100644
--- a/src/core/lib/security/secure_endpoint.c
+++ b/src/core/lib/security/secure_endpoint.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/secure_endpoint.h b/src/core/lib/security/secure_endpoint.h
index 57bd160a52..ff1c6639de 100644
--- a/src/core/lib/security/secure_endpoint.h
+++ b/src/core/lib/security/secure_endpoint.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/security_connector.c b/src/core/lib/security/security_connector.c
index 5474bc3a9e..4d8c5dd82d 100644
--- a/src/core/lib/security/security_connector.c
+++ b/src/core/lib/security/security_connector.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,6 +42,7 @@
 #include <grpc/support/slice_buffer.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/ext/transport/chttp2/transport/alpn.h"
 #include "src/core/lib/security/credentials.h"
 #include "src/core/lib/security/handshake.h"
 #include "src/core/lib/security/secure_endpoint.h"
@@ -49,7 +50,6 @@
 #include "src/core/lib/support/env.h"
 #include "src/core/lib/support/load_file.h"
 #include "src/core/lib/support/string.h"
-#include "src/core/lib/transport/chttp2/alpn.h"
 #include "src/core/lib/tsi/fake_transport_security.h"
 #include "src/core/lib/tsi/ssl_transport_security.h"
 
diff --git a/src/core/lib/security/security_connector.h b/src/core/lib/security/security_connector.h
index d50091c628..c9e262b1ad 100644
--- a/src/core/lib/security/security_connector.h
+++ b/src/core/lib/security/security_connector.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/security_context.c b/src/core/lib/security/security_context.c
index 0e66373bd8..343e0b5b8b 100644
--- a/src/core/lib/security/security_context.c
+++ b/src/core/lib/security/security_context.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/security_context.h b/src/core/lib/security/security_context.h
index e9e4e503bc..81161ec47d 100644
--- a/src/core/lib/security/security_context.h
+++ b/src/core/lib/security/security_context.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/security/server_auth_filter.c b/src/core/lib/security/server_auth_filter.c
index 158cde0e2c..7844dc87cb 100644
--- a/src/core/lib/security/server_auth_filter.c
+++ b/src/core/lib/security/server_auth_filter.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/alloc.c b/src/core/lib/support/alloc.c
index 27fa6a95ed..020917f79c 100644
--- a/src/core/lib/support/alloc.c
+++ b/src/core/lib/support/alloc.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/avl.c b/src/core/lib/support/avl.c
index f378b3ee17..8d3ce23e6c 100644
--- a/src/core/lib/support/avl.c
+++ b/src/core/lib/support/avl.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/block_annotate.h b/src/core/lib/support/block_annotate.h
index bd3071655e..8fb380241f 100644
--- a/src/core/lib/support/block_annotate.h
+++ b/src/core/lib/support/block_annotate.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/cmdline.c b/src/core/lib/support/cmdline.c
index 35c4990b22..d47498676d 100644
--- a/src/core/lib/support/cmdline.c
+++ b/src/core/lib/support/cmdline.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/cpu_iphone.c b/src/core/lib/support/cpu_iphone.c
index e83191bada..82b49b47bc 100644
--- a/src/core/lib/support/cpu_iphone.c
+++ b/src/core/lib/support/cpu_iphone.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/cpu_linux.c b/src/core/lib/support/cpu_linux.c
index 5597df2d03..d6f7e7d3da 100644
--- a/src/core/lib/support/cpu_linux.c
+++ b/src/core/lib/support/cpu_linux.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/cpu_posix.c b/src/core/lib/support/cpu_posix.c
index e508ddd8ca..667bde7cad 100644
--- a/src/core/lib/support/cpu_posix.c
+++ b/src/core/lib/support/cpu_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/cpu_windows.c b/src/core/lib/support/cpu_windows.c
index 0f84a9e5ea..ce32eb0a9d 100644
--- a/src/core/lib/support/cpu_windows.c
+++ b/src/core/lib/support/cpu_windows.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/env.h b/src/core/lib/support/env.h
index ddc4ee3c6d..ec3959bc6e 100644
--- a/src/core/lib/support/env.h
+++ b/src/core/lib/support/env.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/env_linux.c b/src/core/lib/support/env_linux.c
index a86133e6c3..2436eb20b0 100644
--- a/src/core/lib/support/env_linux.c
+++ b/src/core/lib/support/env_linux.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/env_posix.c b/src/core/lib/support/env_posix.c
index 1b57b094a9..ff47630443 100644
--- a/src/core/lib/support/env_posix.c
+++ b/src/core/lib/support/env_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/env_win32.c b/src/core/lib/support/env_win32.c
index 566feee49e..ef84c941df 100644
--- a/src/core/lib/support/env_win32.c
+++ b/src/core/lib/support/env_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/histogram.c b/src/core/lib/support/histogram.c
index 62227be1a6..7b016bbc78 100644
--- a/src/core/lib/support/histogram.c
+++ b/src/core/lib/support/histogram.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/host_port.c b/src/core/lib/support/host_port.c
index e03f6241ff..f19bdbc835 100644
--- a/src/core/lib/support/host_port.c
+++ b/src/core/lib/support/host_port.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/load_file.c b/src/core/lib/support/load_file.c
index 0cecd5edd5..f30aacdd4f 100644
--- a/src/core/lib/support/load_file.c
+++ b/src/core/lib/support/load_file.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/load_file.h b/src/core/lib/support/load_file.h
index fe030c967e..9a4b27942e 100644
--- a/src/core/lib/support/load_file.h
+++ b/src/core/lib/support/load_file.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/log.c b/src/core/lib/support/log.c
index cd6a0726cf..04156a5b1f 100644
--- a/src/core/lib/support/log.c
+++ b/src/core/lib/support/log.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/log_android.c b/src/core/lib/support/log_android.c
index 640c9d7099..94c8100fd7 100644
--- a/src/core/lib/support/log_android.c
+++ b/src/core/lib/support/log_android.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/log_linux.c b/src/core/lib/support/log_linux.c
index e60512c526..6d4b63bbe0 100644
--- a/src/core/lib/support/log_linux.c
+++ b/src/core/lib/support/log_linux.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/log_posix.c b/src/core/lib/support/log_posix.c
index 7429dd0a2c..6ae6320767 100644
--- a/src/core/lib/support/log_posix.c
+++ b/src/core/lib/support/log_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/log_win32.c b/src/core/lib/support/log_win32.c
index cec99440a5..ba78497a0a 100644
--- a/src/core/lib/support/log_win32.c
+++ b/src/core/lib/support/log_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/murmur_hash.c b/src/core/lib/support/murmur_hash.c
index 97832f1510..5711fff0c0 100644
--- a/src/core/lib/support/murmur_hash.c
+++ b/src/core/lib/support/murmur_hash.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/murmur_hash.h b/src/core/lib/support/murmur_hash.h
index e54cdf2592..6d282ff358 100644
--- a/src/core/lib/support/murmur_hash.h
+++ b/src/core/lib/support/murmur_hash.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/slice.c b/src/core/lib/support/slice.c
index cf3953ce4e..b9a7c77bda 100644
--- a/src/core/lib/support/slice.c
+++ b/src/core/lib/support/slice.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/slice_buffer.c b/src/core/lib/support/slice_buffer.c
index 563e659dd7..66f111d767 100644
--- a/src/core/lib/support/slice_buffer.c
+++ b/src/core/lib/support/slice_buffer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/stack_lockfree.c b/src/core/lib/support/stack_lockfree.c
index de80486132..9d7c9e5a38 100644
--- a/src/core/lib/support/stack_lockfree.c
+++ b/src/core/lib/support/stack_lockfree.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/stack_lockfree.h b/src/core/lib/support/stack_lockfree.h
index a030a01d1f..35ef7c2959 100644
--- a/src/core/lib/support/stack_lockfree.h
+++ b/src/core/lib/support/stack_lockfree.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/string.c b/src/core/lib/support/string.c
index 365d861de3..a2ab6c5f1f 100644
--- a/src/core/lib/support/string.c
+++ b/src/core/lib/support/string.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/string.h b/src/core/lib/support/string.h
index 68c02878e0..ea58610914 100644
--- a/src/core/lib/support/string.h
+++ b/src/core/lib/support/string.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/string_posix.c b/src/core/lib/support/string_posix.c
index a73b3106a5..c804ed5ded 100644
--- a/src/core/lib/support/string_posix.c
+++ b/src/core/lib/support/string_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/string_win32.c b/src/core/lib/support/string_win32.c
index 16b7e37f2a..a2f9857356 100644
--- a/src/core/lib/support/string_win32.c
+++ b/src/core/lib/support/string_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/string_win32.h b/src/core/lib/support/string_win32.h
index f47d567715..ff4a694ca9 100644
--- a/src/core/lib/support/string_win32.h
+++ b/src/core/lib/support/string_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/subprocess_posix.c b/src/core/lib/support/subprocess_posix.c
index 662e7dd999..4f4de9298e 100644
--- a/src/core/lib/support/subprocess_posix.c
+++ b/src/core/lib/support/subprocess_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/sync.c b/src/core/lib/support/sync.c
index 800cf20287..44b83f8175 100644
--- a/src/core/lib/support/sync.c
+++ b/src/core/lib/support/sync.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/sync_posix.c b/src/core/lib/support/sync_posix.c
index a5e59db8c7..dcb0969a4e 100644
--- a/src/core/lib/support/sync_posix.c
+++ b/src/core/lib/support/sync_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/sync_win32.c b/src/core/lib/support/sync_win32.c
index 41998ebcb6..470a9f9704 100644
--- a/src/core/lib/support/sync_win32.c
+++ b/src/core/lib/support/sync_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/thd.c b/src/core/lib/support/thd.c
index d59aace38d..41daeb5d0e 100644
--- a/src/core/lib/support/thd.c
+++ b/src/core/lib/support/thd.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/thd_internal.h b/src/core/lib/support/thd_internal.h
index f269a3249e..975d5537cc 100644
--- a/src/core/lib/support/thd_internal.h
+++ b/src/core/lib/support/thd_internal.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/thd_posix.c b/src/core/lib/support/thd_posix.c
index 1c703844b4..2fc23bffaf 100644
--- a/src/core/lib/support/thd_posix.c
+++ b/src/core/lib/support/thd_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/thd_win32.c b/src/core/lib/support/thd_win32.c
index 630eb7f625..6deb3140eb 100644
--- a/src/core/lib/support/thd_win32.c
+++ b/src/core/lib/support/thd_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/time.c b/src/core/lib/support/time.c
index 0e2c8fcf1a..57f8331194 100644
--- a/src/core/lib/support/time.c
+++ b/src/core/lib/support/time.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/time_posix.c b/src/core/lib/support/time_posix.c
index fcfab2f2fa..f5f62dadc6 100644
--- a/src/core/lib/support/time_posix.c
+++ b/src/core/lib/support/time_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/time_precise.c b/src/core/lib/support/time_precise.c
index 31ac47e0f8..a2cf74bc84 100644
--- a/src/core/lib/support/time_precise.c
+++ b/src/core/lib/support/time_precise.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/time_precise.h b/src/core/lib/support/time_precise.h
index e1faee1f9f..30818d04b9 100644
--- a/src/core/lib/support/time_precise.h
+++ b/src/core/lib/support/time_precise.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/time_win32.c b/src/core/lib/support/time_win32.c
index a6ac003fb8..f7acbd14a6 100644
--- a/src/core/lib/support/time_win32.c
+++ b/src/core/lib/support/time_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/tls_pthread.c b/src/core/lib/support/tls_pthread.c
index bdc7ed14ae..9683a6e547 100644
--- a/src/core/lib/support/tls_pthread.c
+++ b/src/core/lib/support/tls_pthread.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/tmpfile.h b/src/core/lib/support/tmpfile.h
index 4fec2076e3..059142ab0f 100644
--- a/src/core/lib/support/tmpfile.h
+++ b/src/core/lib/support/tmpfile.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/tmpfile_posix.c b/src/core/lib/support/tmpfile_posix.c
index 743f45e1bc..9e0e7ad808 100644
--- a/src/core/lib/support/tmpfile_posix.c
+++ b/src/core/lib/support/tmpfile_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/support/tmpfile_win32.c b/src/core/lib/support/tmpfile_win32.c
index 05d92b6036..0cb2904f8d 100644
--- a/src/core/lib/support/tmpfile_win32.c
+++ b/src/core/lib/support/tmpfile_win32.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/alarm.c b/src/core/lib/surface/alarm.c
index 368683378e..2cf2f00b31 100644
--- a/src/core/lib/surface/alarm.c
+++ b/src/core/lib/surface/alarm.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/api_trace.c b/src/core/lib/surface/api_trace.c
index 3702c024db..79e3e5ca9b 100644
--- a/src/core/lib/surface/api_trace.c
+++ b/src/core/lib/surface/api_trace.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/api_trace.h b/src/core/lib/surface/api_trace.h
index b50011c9e5..c60aaba5e9 100644
--- a/src/core/lib/surface/api_trace.h
+++ b/src/core/lib/surface/api_trace.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/byte_buffer.c b/src/core/lib/surface/byte_buffer.c
index 314a67dfcc..a093a37af3 100644
--- a/src/core/lib/surface/byte_buffer.c
+++ b/src/core/lib/surface/byte_buffer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/byte_buffer_reader.c b/src/core/lib/surface/byte_buffer_reader.c
index 7248f5fe71..809fd5f1fa 100644
--- a/src/core/lib/surface/byte_buffer_reader.c
+++ b/src/core/lib/surface/byte_buffer_reader.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/call.c b/src/core/lib/surface/call.c
index d63a4a7401..37cc724b53 100644
--- a/src/core/lib/surface/call.c
+++ b/src/core/lib/surface/call.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -174,6 +174,9 @@ struct grpc_call {
   /* Received call statuses from various sources */
   received_status status[STATUS_SOURCE_COUNT];
 
+  /* Call stats: only valid after trailing metadata received */
+  grpc_transport_stream_stats stats;
+
   /* Compression algorithm for the call */
   grpc_compression_algorithm compression_algorithm;
   /* Supported encodings (compression algorithms), a bitset */
@@ -909,7 +912,7 @@ static void set_cancelled_value(grpc_status_code status, void *dest) {
   *(int *)dest = (status != GRPC_STATUS_OK);
 }
 
-static int are_write_flags_valid(uint32_t flags) {
+static bool are_write_flags_valid(uint32_t flags) {
   /* check that only bits in GRPC_WRITE_(INTERNAL?)_USED_MASK are set */
   const uint32_t allowed_write_positions =
       (GRPC_WRITE_USED_MASK | GRPC_WRITE_INTERNAL_USED_MASK);
@@ -917,6 +920,15 @@ static int are_write_flags_valid(uint32_t flags) {
   return !(flags & invalid_positions);
 }
 
+static bool are_initial_metadata_flags_valid(uint32_t flags, bool is_client) {
+  /* check that only bits in GRPC_WRITE_(INTERNAL?)_USED_MASK are set */
+  uint32_t invalid_positions = ~GRPC_INITIAL_METADATA_USED_MASK;
+  if (!is_client) {
+    invalid_positions |= GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST;
+  }
+  return !(flags & invalid_positions);
+}
+
 static batch_control *allocate_batch_control(grpc_call *call) {
   size_t i;
   for (i = 0; i < MAX_CONCURRENT_BATCHES; i++) {
@@ -1196,7 +1208,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
     switch (op->op) {
       case GRPC_OP_SEND_INITIAL_METADATA:
         /* Flag validation: currently allow no flags */
-        if (op->flags != 0) {
+        if (!are_initial_metadata_flags_valid(op->flags, call->is_client)) {
           error = GRPC_CALL_ERROR_INVALID_FLAGS;
           goto done_with_error;
         }
@@ -1220,6 +1232,8 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         call->metadata_batch[0][0].deadline = call->send_deadline;
         stream_op.send_initial_metadata =
             &call->metadata_batch[0 /* is_receiving */][0 /* is_trailing */];
+        stream_op.send_idempotent_request =
+            (op->flags & GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) != 0;
         break;
       case GRPC_OP_SEND_MESSAGE:
         if (!are_write_flags_valid(op->flags)) {
@@ -1371,6 +1385,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         bctl->recv_final_op = 1;
         stream_op.recv_trailing_metadata =
             &call->metadata_batch[1 /* is_receiving */][1 /* is_trailing */];
+        stream_op.collect_stats = &call->stats;
         break;
       case GRPC_OP_RECV_CLOSE_ON_SERVER:
         /* Flag validation: currently allow no flags */
@@ -1392,6 +1407,7 @@ static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
         bctl->recv_final_op = 1;
         stream_op.recv_trailing_metadata =
             &call->metadata_batch[1 /* is_receiving */][1 /* is_trailing */];
+        stream_op.collect_stats = &call->stats;
         break;
     }
   }
diff --git a/src/core/lib/surface/call.h b/src/core/lib/surface/call.h
index e2e75865be..2725e060b8 100644
--- a/src/core/lib/surface/call.h
+++ b/src/core/lib/surface/call.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/call_details.c b/src/core/lib/surface/call_details.c
index 08f606d84a..fe73da3f55 100644
--- a/src/core/lib/surface/call_details.c
+++ b/src/core/lib/surface/call_details.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/call_log_batch.c b/src/core/lib/surface/call_log_batch.c
index bc5a2ffb65..a6d1d5149f 100644
--- a/src/core/lib/surface/call_log_batch.c
+++ b/src/core/lib/surface/call_log_batch.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/call_test_only.h b/src/core/lib/surface/call_test_only.h
index 400214189e..47088991d3 100644
--- a/src/core/lib/surface/call_test_only.h
+++ b/src/core/lib/surface/call_test_only.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index d815daa70c..06f991b085 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/channel.h b/src/core/lib/surface/channel.h
index 09de0fccc9..640fd7e137 100644
--- a/src/core/lib/surface/channel.h
+++ b/src/core/lib/surface/channel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/channel_connectivity.c b/src/core/lib/surface/channel_connectivity.c
index 2f5d763e70..9a9ee422c2 100644
--- a/src/core/lib/surface/channel_connectivity.c
+++ b/src/core/lib/surface/channel_connectivity.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/channel_ping.c b/src/core/lib/surface/channel_ping.c
index dd862cdadd..5a50698695 100644
--- a/src/core/lib/surface/channel_ping.c
+++ b/src/core/lib/surface/channel_ping.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/channel_stack_type.h b/src/core/lib/surface/channel_stack_type.h
index 16608fa386..4eea4f1b01 100644
--- a/src/core/lib/surface/channel_stack_type.h
+++ b/src/core/lib/surface/channel_stack_type.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/completion_queue.c b/src/core/lib/surface/completion_queue.c
index a0d7002053..5ec8808b50 100644
--- a/src/core/lib/surface/completion_queue.c
+++ b/src/core/lib/surface/completion_queue.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/completion_queue.h b/src/core/lib/surface/completion_queue.h
index 35591cb6f4..eef82cf014 100644
--- a/src/core/lib/surface/completion_queue.h
+++ b/src/core/lib/surface/completion_queue.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/event_string.c b/src/core/lib/surface/event_string.c
index 360c718a17..1abc6ebf8c 100644
--- a/src/core/lib/surface/event_string.c
+++ b/src/core/lib/surface/event_string.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/event_string.h b/src/core/lib/surface/event_string.h
index 577e9c718f..bc1464380d 100644
--- a/src/core/lib/surface/event_string.h
+++ b/src/core/lib/surface/event_string.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/init.c b/src/core/lib/surface/init.c
index dcb9c62d36..aca4ce9d07 100644
--- a/src/core/lib/surface/init.c
+++ b/src/core/lib/surface/init.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,20 +39,15 @@
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/time.h>
-/* TODO(ctiller): find another way? - better not to include census here */
-#include "src/core/lib/census/grpc_plugin.h"
+#include "src/core/ext/transport/chttp2/transport/chttp2_transport.h"
 #include "src/core/lib/channel/channel_stack.h"
 #include "src/core/lib/channel/client_channel.h"
 #include "src/core/lib/channel/compress_filter.h"
 #include "src/core/lib/channel/connected_channel.h"
 #include "src/core/lib/channel/http_client_filter.h"
 #include "src/core/lib/channel/http_server_filter.h"
-#include "src/core/lib/client_config/lb_policies/pick_first.h"
-#include "src/core/lib/client_config/lb_policies/round_robin.h"
 #include "src/core/lib/client_config/lb_policy_registry.h"
 #include "src/core/lib/client_config/resolver_registry.h"
-#include "src/core/lib/client_config/resolvers/dns_resolver.h"
-#include "src/core/lib/client_config/resolvers/sockaddr_resolver.h"
 #include "src/core/lib/client_config/subchannel.h"
 #include "src/core/lib/client_config/subchannel_index.h"
 #include "src/core/lib/debug/trace.h"
@@ -67,7 +62,6 @@
 #include "src/core/lib/surface/lame_client.h"
 #include "src/core/lib/surface/server.h"
 #include "src/core/lib/surface/surface_trace.h"
-#include "src/core/lib/transport/chttp2_transport.h"
 #include "src/core/lib/transport/connectivity_state.h"
 #include "src/core/lib/transport/transport_impl.h"
 
@@ -75,6 +69,9 @@
 #define GRPC_DEFAULT_NAME_PREFIX "dns:///"
 #endif
 
+/* (generated) built in registry of plugins */
+extern void grpc_register_built_in_plugins(void);
+
 #define MAX_PLUGINS 128
 
 static gpr_once g_basic_init = GPR_ONCE_INIT;
@@ -83,8 +80,7 @@ static int g_initializations;
 
 static void do_basic_init(void) {
   gpr_mu_init(&g_init_mu);
-  /* TODO(ctiller): ideally remove this strict linkage */
-  grpc_register_plugin(census_grpc_plugin_init, census_grpc_plugin_destroy);
+  grpc_register_built_in_plugins();
   g_initializations = 0;
 }
 
@@ -165,16 +161,8 @@ void grpc_init(void) {
     gpr_time_init();
     grpc_mdctx_global_init();
     grpc_channel_init_init();
-    grpc_lb_policy_registry_init(grpc_pick_first_lb_factory_create());
-    grpc_register_lb_policy(grpc_pick_first_lb_factory_create());
-    grpc_register_lb_policy(grpc_round_robin_lb_factory_create());
+    grpc_lb_policy_registry_init();
     grpc_resolver_registry_init(GRPC_DEFAULT_NAME_PREFIX);
-    grpc_register_resolver_type(grpc_dns_resolver_factory_create());
-    grpc_register_resolver_type(grpc_ipv4_resolver_factory_create());
-    grpc_register_resolver_type(grpc_ipv6_resolver_factory_create());
-#ifdef GPR_POSIX_SOCKET
-    grpc_register_resolver_type(grpc_unix_resolver_factory_create());
-#endif
     grpc_register_tracer("api", &grpc_api_trace);
     grpc_register_tracer("channel", &grpc_trace_channel);
     grpc_register_tracer("http", &grpc_http_trace);
diff --git a/src/core/lib/surface/init.h b/src/core/lib/surface/init.h
index 10e2a5896e..b1bf57c10d 100644
--- a/src/core/lib/surface/init.h
+++ b/src/core/lib/surface/init.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/init_secure.c b/src/core/lib/surface/init_secure.c
index d3c2f645a7..3fda2c9e1e 100644
--- a/src/core/lib/surface/init_secure.c
+++ b/src/core/lib/surface/init_secure.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/init_unsecure.c b/src/core/lib/surface/init_unsecure.c
index 243c005d86..f952739e0a 100644
--- a/src/core/lib/surface/init_unsecure.c
+++ b/src/core/lib/surface/init_unsecure.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/lame_client.c b/src/core/lib/surface/lame_client.c
index 95ec4b06c3..c1f6812c4e 100644
--- a/src/core/lib/surface/lame_client.c
+++ b/src/core/lib/surface/lame_client.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/metadata_array.c b/src/core/lib/surface/metadata_array.c
index 4436f2da87..6c2b750e1d 100644
--- a/src/core/lib/surface/metadata_array.c
+++ b/src/core/lib/surface/metadata_array.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/server.c b/src/core/lib/surface/server.c
index 080734e9d5..1898bee1c1 100644
--- a/src/core/lib/surface/server.c
+++ b/src/core/lib/surface/server.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -100,6 +100,7 @@ typedef struct requested_call {
 
 typedef struct channel_registered_method {
   registered_method *server_registered_method;
+  uint32_t flags;
   grpc_mdstr *method;
   grpc_mdstr *host;
 } channel_registered_method;
@@ -152,6 +153,7 @@ struct call_data {
   grpc_completion_queue *cq_new;
 
   grpc_metadata_batch *recv_initial_metadata;
+  bool recv_idempotent_request;
   grpc_metadata_array initial_metadata;
 
   grpc_closure got_initial_metadata;
@@ -171,6 +173,7 @@ struct request_matcher {
 struct registered_method {
   char *method;
   char *host;
+  uint32_t flags;
   request_matcher request_matcher;
   registered_method *next;
 };
@@ -468,6 +471,9 @@ static void start_new_rpc(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
       if (!rm) break;
       if (rm->host != calld->host) continue;
       if (rm->method != calld->path) continue;
+      if ((rm->flags & GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) &&
+          !calld->recv_idempotent_request)
+        continue;
       finish_start_new_rpc(exec_ctx, server, elem,
                            &rm->server_registered_method->request_matcher);
       return;
@@ -480,6 +486,9 @@ static void start_new_rpc(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
       if (!rm) break;
       if (rm->host != NULL) continue;
       if (rm->method != calld->path) continue;
+      if ((rm->flags & GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST) &&
+          !calld->recv_idempotent_request)
+        continue;
       finish_start_new_rpc(exec_ctx, server, elem,
                            &rm->server_registered_method->request_matcher);
       return;
@@ -598,9 +607,11 @@ static void server_mutate_op(grpc_call_element *elem,
   call_data *calld = elem->call_data;
 
   if (op->recv_initial_metadata != NULL) {
+    GPR_ASSERT(op->recv_idempotent_request == NULL);
     calld->recv_initial_metadata = op->recv_initial_metadata;
     calld->on_done_recv_initial_metadata = op->recv_initial_metadata_ready;
     op->recv_initial_metadata_ready = &calld->server_on_recv_initial_metadata;
+    op->recv_idempotent_request = &calld->recv_idempotent_request;
   }
 }
 
@@ -830,10 +841,12 @@ static int streq(const char *a, const char *b) {
 }
 
 void *grpc_server_register_method(grpc_server *server, const char *method,
-                                  const char *host) {
+                                  const char *host, uint32_t flags) {
   registered_method *m;
-  GRPC_API_TRACE("grpc_server_register_method(server=%p, method=%s, host=%s)",
-                 3, (server, method, host));
+  GRPC_API_TRACE(
+      "grpc_server_register_method(server=%p, method=%s, host=%s, "
+      "flags=0x%08x)",
+      4, (server, method, host, flags));
   if (!method) {
     gpr_log(GPR_ERROR,
             "grpc_server_register_method method string cannot be NULL");
@@ -846,12 +859,18 @@ void *grpc_server_register_method(grpc_server *server, const char *method,
       return NULL;
     }
   }
+  if ((flags & ~GRPC_INITIAL_METADATA_USED_MASK) != 0) {
+    gpr_log(GPR_ERROR, "grpc_server_register_method invalid flags 0x%08x",
+            flags);
+    return NULL;
+  }
   m = gpr_malloc(sizeof(registered_method));
   memset(m, 0, sizeof(*m));
   request_matcher_init(&m->request_matcher, server->max_requested_calls);
   m->method = gpr_strdup(method);
   m->host = gpr_strdup(host);
   m->next = server->registered_methods;
+  m->flags = flags;
   server->registered_methods = m;
   return m;
 }
@@ -930,6 +949,7 @@ void grpc_server_setup_transport(grpc_exec_ctx *exec_ctx, grpc_server *s,
       if (probes > max_probes) max_probes = probes;
       crm = &chand->registered_methods[(hash + probes) % slots];
       crm->server_registered_method = rm;
+      crm->flags = rm->flags;
       crm->host = host;
       crm->method = method;
     }
@@ -1247,6 +1267,10 @@ static void begin_call(grpc_exec_ctx *exec_ctx, grpc_server *server,
       cpstr(&rc->data.batch.details->method,
             &rc->data.batch.details->method_capacity, calld->path);
       rc->data.batch.details->deadline = calld->deadline;
+      rc->data.batch.details->flags =
+          0 | (calld->recv_idempotent_request
+                   ? GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST
+                   : 0);
       break;
     case REGISTERED_CALL:
       *rc->data.registered.deadline = calld->deadline;
diff --git a/src/core/lib/surface/server.h b/src/core/lib/surface/server.h
index 3845eb2981..470ef23c69 100644
--- a/src/core/lib/surface/server.h
+++ b/src/core/lib/surface/server.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/surface_trace.h b/src/core/lib/surface/surface_trace.h
index 6b3f673924..a69a0fff57 100644
--- a/src/core/lib/surface/surface_trace.h
+++ b/src/core/lib/surface/surface_trace.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/surface/version.c b/src/core/lib/surface/version.c
index 7723f39401..fe954cbefb 100644
--- a/src/core/lib/surface/version.c
+++ b/src/core/lib/surface/version.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/byte_stream.c b/src/core/lib/transport/byte_stream.c
index 79981aa154..2f6c75cb6a 100644
--- a/src/core/lib/transport/byte_stream.c
+++ b/src/core/lib/transport/byte_stream.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/byte_stream.h b/src/core/lib/transport/byte_stream.h
index e7346dafc3..95519a9eaf 100644
--- a/src/core/lib/transport/byte_stream.h
+++ b/src/core/lib/transport/byte_stream.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/connectivity_state.c b/src/core/lib/transport/connectivity_state.c
index 123eab8b36..e24ee638fd 100644
--- a/src/core/lib/transport/connectivity_state.c
+++ b/src/core/lib/transport/connectivity_state.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/connectivity_state.h b/src/core/lib/transport/connectivity_state.h
index 6f92132438..2eb7e09124 100644
--- a/src/core/lib/transport/connectivity_state.h
+++ b/src/core/lib/transport/connectivity_state.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/metadata.c b/src/core/lib/transport/metadata.c
index 7605f09991..2b1d32d55e 100644
--- a/src/core/lib/transport/metadata.c
+++ b/src/core/lib/transport/metadata.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -44,11 +44,11 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 
+#include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
 #include "src/core/lib/iomgr/iomgr_internal.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/support/murmur_hash.h"
 #include "src/core/lib/support/string.h"
-#include "src/core/lib/transport/chttp2/bin_encoder.h"
 #include "src/core/lib/transport/static_metadata.h"
 
 /* There are two kinds of mdelem and mdstr instances.
diff --git a/src/core/lib/transport/metadata.h b/src/core/lib/transport/metadata.h
index d72ec9accc..6a02437fdf 100644
--- a/src/core/lib/transport/metadata.h
+++ b/src/core/lib/transport/metadata.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/metadata_batch.c b/src/core/lib/transport/metadata_batch.c
index bb79b8fa96..4567221a48 100644
--- a/src/core/lib/transport/metadata_batch.c
+++ b/src/core/lib/transport/metadata_batch.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/metadata_batch.h b/src/core/lib/transport/metadata_batch.h
index f1d4726989..b62668876e 100644
--- a/src/core/lib/transport/metadata_batch.h
+++ b/src/core/lib/transport/metadata_batch.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/static_metadata.c b/src/core/lib/transport/static_metadata.c
index eda277b3dc..73b0041fd4 100644
--- a/src/core/lib/transport/static_metadata.c
+++ b/src/core/lib/transport/static_metadata.c
@@ -1,6 +1,5 @@
 /*
- *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -28,19 +27,16 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
  */
 
 /*
  * WARNING: Auto-generated code.
  *
  * To make changes to this file, change
- * tools/codegen/core/gen_static_metadata.py,
- * and then re-run it.
+ * tools/codegen/core/gen_static_metadata.py, and then re-run it.
  *
  * See metadata.h for an explanation of the interface here, and metadata.c for
- * an
- * explanation of what's going on.
+ * an explanation of what's going on.
  */
 
 #include "src/core/lib/transport/static_metadata.h"
@@ -52,7 +48,7 @@ uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 4, 8, 6, 2, 4, 8, 6, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
 const uint8_t grpc_static_metadata_elem_indices[GRPC_STATIC_MDELEM_COUNT * 2] =
     {11, 35, 10, 35, 12, 35, 12, 49, 13, 35, 14, 35, 15, 35, 16, 35, 17, 35,
@@ -60,10 +56,10 @@ const uint8_t grpc_static_metadata_elem_indices[GRPC_STATIC_MDELEM_COUNT * 2] =
      30, 18, 30, 35, 31, 35, 32, 35, 36, 35, 37, 35, 38, 35, 39, 35, 42, 33,
      42, 34, 42, 48, 42, 53, 42, 54, 42, 55, 42, 56, 43, 33, 43, 48, 43, 53,
      46, 0,  46, 1,  46, 2,  50, 35, 57, 35, 58, 35, 59, 35, 60, 35, 61, 35,
-     62, 35, 63, 35, 64, 35, 65, 35, 66, 40, 66, 68, 67, 78, 67, 79, 69, 35,
-     70, 35, 71, 35, 72, 35, 73, 35, 74, 35, 75, 41, 75, 51, 75, 52, 76, 35,
-     77, 35, 80, 3,  80, 4,  80, 5,  80, 6,  80, 7,  80, 8,  80, 9,  81, 35,
-     82, 83, 84, 35, 85, 35, 86, 35, 87, 35, 88, 35};
+     62, 35, 63, 35, 64, 35, 65, 35, 66, 40, 66, 68, 66, 71, 67, 79, 67, 80,
+     69, 35, 70, 35, 72, 35, 73, 35, 74, 35, 75, 35, 76, 41, 76, 51, 76, 52,
+     77, 35, 78, 35, 81, 3,  81, 4,  81, 5,  81, 6,  81, 7,  81, 8,  81, 9,
+     82, 35, 83, 84, 85, 35, 86, 35, 87, 35, 88, 35, 89, 35};
 
 const char *const grpc_static_metadata_strings[GRPC_STATIC_MDSTR_COUNT] = {
     "0",
@@ -137,6 +133,7 @@ const char *const grpc_static_metadata_strings[GRPC_STATIC_MDSTR_COUNT] = {
     "POST",
     "proxy-authenticate",
     "proxy-authorization",
+    "PUT",
     "range",
     "referer",
     "refresh",
diff --git a/src/core/lib/transport/static_metadata.h b/src/core/lib/transport/static_metadata.h
index aff136a6d2..f9d8bcdc8f 100644
--- a/src/core/lib/transport/static_metadata.h
+++ b/src/core/lib/transport/static_metadata.h
@@ -1,6 +1,5 @@
 /*
- *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -28,19 +27,16 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
  */
 
 /*
  * WARNING: Auto-generated code.
  *
  * To make changes to this file, change
- * tools/codegen/core/gen_static_metadata.py,
- * and then re-run it.
+ * tools/codegen/core/gen_static_metadata.py, and then re-run it.
  *
  * See metadata.h for an explanation of the interface here, and metadata.c for
- * an
- * explanation of what's going on.
+ * an explanation of what's going on.
  */
 
 #ifndef GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H
@@ -48,7 +44,7 @@
 
 #include "src/core/lib/transport/metadata.h"
 
-#define GRPC_STATIC_MDSTR_COUNT 89
+#define GRPC_STATIC_MDSTR_COUNT 90
 extern grpc_mdstr grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT];
 /* "0" */
 #define GRPC_MDSTR_0 (&grpc_static_mdstr_table[0])
@@ -193,44 +189,46 @@ extern grpc_mdstr grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT];
 #define GRPC_MDSTR_PROXY_AUTHENTICATE (&grpc_static_mdstr_table[69])
 /* "proxy-authorization" */
 #define GRPC_MDSTR_PROXY_AUTHORIZATION (&grpc_static_mdstr_table[70])
+/* "PUT" */
+#define GRPC_MDSTR_PUT (&grpc_static_mdstr_table[71])
 /* "range" */
-#define GRPC_MDSTR_RANGE (&grpc_static_mdstr_table[71])
+#define GRPC_MDSTR_RANGE (&grpc_static_mdstr_table[72])
 /* "referer" */
-#define GRPC_MDSTR_REFERER (&grpc_static_mdstr_table[72])
+#define GRPC_MDSTR_REFERER (&grpc_static_mdstr_table[73])
 /* "refresh" */
-#define GRPC_MDSTR_REFRESH (&grpc_static_mdstr_table[73])
+#define GRPC_MDSTR_REFRESH (&grpc_static_mdstr_table[74])
 /* "retry-after" */
-#define GRPC_MDSTR_RETRY_AFTER (&grpc_static_mdstr_table[74])
+#define GRPC_MDSTR_RETRY_AFTER (&grpc_static_mdstr_table[75])
 /* ":scheme" */
-#define GRPC_MDSTR_SCHEME (&grpc_static_mdstr_table[75])
+#define GRPC_MDSTR_SCHEME (&grpc_static_mdstr_table[76])
 /* "server" */
-#define GRPC_MDSTR_SERVER (&grpc_static_mdstr_table[76])
+#define GRPC_MDSTR_SERVER (&grpc_static_mdstr_table[77])
 /* "set-cookie" */
-#define GRPC_MDSTR_SET_COOKIE (&grpc_static_mdstr_table[77])
+#define GRPC_MDSTR_SET_COOKIE (&grpc_static_mdstr_table[78])
 /* "/" */
-#define GRPC_MDSTR_SLASH (&grpc_static_mdstr_table[78])
+#define GRPC_MDSTR_SLASH (&grpc_static_mdstr_table[79])
 /* "/index.html" */
-#define GRPC_MDSTR_SLASH_INDEX_DOT_HTML (&grpc_static_mdstr_table[79])
+#define GRPC_MDSTR_SLASH_INDEX_DOT_HTML (&grpc_static_mdstr_table[80])
 /* ":status" */
-#define GRPC_MDSTR_STATUS (&grpc_static_mdstr_table[80])
+#define GRPC_MDSTR_STATUS (&grpc_static_mdstr_table[81])
 /* "strict-transport-security" */
-#define GRPC_MDSTR_STRICT_TRANSPORT_SECURITY (&grpc_static_mdstr_table[81])
+#define GRPC_MDSTR_STRICT_TRANSPORT_SECURITY (&grpc_static_mdstr_table[82])
 /* "te" */
-#define GRPC_MDSTR_TE (&grpc_static_mdstr_table[82])
+#define GRPC_MDSTR_TE (&grpc_static_mdstr_table[83])
 /* "trailers" */
-#define GRPC_MDSTR_TRAILERS (&grpc_static_mdstr_table[83])
+#define GRPC_MDSTR_TRAILERS (&grpc_static_mdstr_table[84])
 /* "transfer-encoding" */
-#define GRPC_MDSTR_TRANSFER_ENCODING (&grpc_static_mdstr_table[84])
+#define GRPC_MDSTR_TRANSFER_ENCODING (&grpc_static_mdstr_table[85])
 /* "user-agent" */
-#define GRPC_MDSTR_USER_AGENT (&grpc_static_mdstr_table[85])
+#define GRPC_MDSTR_USER_AGENT (&grpc_static_mdstr_table[86])
 /* "vary" */
-#define GRPC_MDSTR_VARY (&grpc_static_mdstr_table[86])
+#define GRPC_MDSTR_VARY (&grpc_static_mdstr_table[87])
 /* "via" */
-#define GRPC_MDSTR_VIA (&grpc_static_mdstr_table[87])
+#define GRPC_MDSTR_VIA (&grpc_static_mdstr_table[88])
 /* "www-authenticate" */
-#define GRPC_MDSTR_WWW_AUTHENTICATE (&grpc_static_mdstr_table[88])
+#define GRPC_MDSTR_WWW_AUTHENTICATE (&grpc_static_mdstr_table[89])
 
-#define GRPC_STATIC_MDELEM_COUNT 78
+#define GRPC_STATIC_MDELEM_COUNT 79
 extern grpc_mdelem grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];
 extern uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];
 /* "accept-charset": "" */
@@ -343,61 +341,63 @@ extern uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];
 #define GRPC_MDELEM_METHOD_GET (&grpc_static_mdelem_table[49])
 /* ":method": "POST" */
 #define GRPC_MDELEM_METHOD_POST (&grpc_static_mdelem_table[50])
+/* ":method": "PUT" */
+#define GRPC_MDELEM_METHOD_PUT (&grpc_static_mdelem_table[51])
 /* ":path": "/" */
-#define GRPC_MDELEM_PATH_SLASH (&grpc_static_mdelem_table[51])
+#define GRPC_MDELEM_PATH_SLASH (&grpc_static_mdelem_table[52])
 /* ":path": "/index.html" */
-#define GRPC_MDELEM_PATH_SLASH_INDEX_DOT_HTML (&grpc_static_mdelem_table[52])
+#define GRPC_MDELEM_PATH_SLASH_INDEX_DOT_HTML (&grpc_static_mdelem_table[53])
 /* "proxy-authenticate": "" */
-#define GRPC_MDELEM_PROXY_AUTHENTICATE_EMPTY (&grpc_static_mdelem_table[53])
+#define GRPC_MDELEM_PROXY_AUTHENTICATE_EMPTY (&grpc_static_mdelem_table[54])
 /* "proxy-authorization": "" */
-#define GRPC_MDELEM_PROXY_AUTHORIZATION_EMPTY (&grpc_static_mdelem_table[54])
+#define GRPC_MDELEM_PROXY_AUTHORIZATION_EMPTY (&grpc_static_mdelem_table[55])
 /* "range": "" */
-#define GRPC_MDELEM_RANGE_EMPTY (&grpc_static_mdelem_table[55])
+#define GRPC_MDELEM_RANGE_EMPTY (&grpc_static_mdelem_table[56])
 /* "referer": "" */
-#define GRPC_MDELEM_REFERER_EMPTY (&grpc_static_mdelem_table[56])
+#define GRPC_MDELEM_REFERER_EMPTY (&grpc_static_mdelem_table[57])
 /* "refresh": "" */
-#define GRPC_MDELEM_REFRESH_EMPTY (&grpc_static_mdelem_table[57])
+#define GRPC_MDELEM_REFRESH_EMPTY (&grpc_static_mdelem_table[58])
 /* "retry-after": "" */
-#define GRPC_MDELEM_RETRY_AFTER_EMPTY (&grpc_static_mdelem_table[58])
+#define GRPC_MDELEM_RETRY_AFTER_EMPTY (&grpc_static_mdelem_table[59])
 /* ":scheme": "grpc" */
-#define GRPC_MDELEM_SCHEME_GRPC (&grpc_static_mdelem_table[59])
+#define GRPC_MDELEM_SCHEME_GRPC (&grpc_static_mdelem_table[60])
 /* ":scheme": "http" */
-#define GRPC_MDELEM_SCHEME_HTTP (&grpc_static_mdelem_table[60])
+#define GRPC_MDELEM_SCHEME_HTTP (&grpc_static_mdelem_table[61])
 /* ":scheme": "https" */
-#define GRPC_MDELEM_SCHEME_HTTPS (&grpc_static_mdelem_table[61])
+#define GRPC_MDELEM_SCHEME_HTTPS (&grpc_static_mdelem_table[62])
 /* "server": "" */
-#define GRPC_MDELEM_SERVER_EMPTY (&grpc_static_mdelem_table[62])
+#define GRPC_MDELEM_SERVER_EMPTY (&grpc_static_mdelem_table[63])
 /* "set-cookie": "" */
-#define GRPC_MDELEM_SET_COOKIE_EMPTY (&grpc_static_mdelem_table[63])
+#define GRPC_MDELEM_SET_COOKIE_EMPTY (&grpc_static_mdelem_table[64])
 /* ":status": "200" */
-#define GRPC_MDELEM_STATUS_200 (&grpc_static_mdelem_table[64])
+#define GRPC_MDELEM_STATUS_200 (&grpc_static_mdelem_table[65])
 /* ":status": "204" */
-#define GRPC_MDELEM_STATUS_204 (&grpc_static_mdelem_table[65])
+#define GRPC_MDELEM_STATUS_204 (&grpc_static_mdelem_table[66])
 /* ":status": "206" */
-#define GRPC_MDELEM_STATUS_206 (&grpc_static_mdelem_table[66])
+#define GRPC_MDELEM_STATUS_206 (&grpc_static_mdelem_table[67])
 /* ":status": "304" */
-#define GRPC_MDELEM_STATUS_304 (&grpc_static_mdelem_table[67])
+#define GRPC_MDELEM_STATUS_304 (&grpc_static_mdelem_table[68])
 /* ":status": "400" */
-#define GRPC_MDELEM_STATUS_400 (&grpc_static_mdelem_table[68])
+#define GRPC_MDELEM_STATUS_400 (&grpc_static_mdelem_table[69])
 /* ":status": "404" */
-#define GRPC_MDELEM_STATUS_404 (&grpc_static_mdelem_table[69])
+#define GRPC_MDELEM_STATUS_404 (&grpc_static_mdelem_table[70])
 /* ":status": "500" */
-#define GRPC_MDELEM_STATUS_500 (&grpc_static_mdelem_table[70])
+#define GRPC_MDELEM_STATUS_500 (&grpc_static_mdelem_table[71])
 /* "strict-transport-security": "" */
 #define GRPC_MDELEM_STRICT_TRANSPORT_SECURITY_EMPTY \
-  (&grpc_static_mdelem_table[71])
+  (&grpc_static_mdelem_table[72])
 /* "te": "trailers" */
-#define GRPC_MDELEM_TE_TRAILERS (&grpc_static_mdelem_table[72])
+#define GRPC_MDELEM_TE_TRAILERS (&grpc_static_mdelem_table[73])
 /* "transfer-encoding": "" */
-#define GRPC_MDELEM_TRANSFER_ENCODING_EMPTY (&grpc_static_mdelem_table[73])
+#define GRPC_MDELEM_TRANSFER_ENCODING_EMPTY (&grpc_static_mdelem_table[74])
 /* "user-agent": "" */
-#define GRPC_MDELEM_USER_AGENT_EMPTY (&grpc_static_mdelem_table[74])
+#define GRPC_MDELEM_USER_AGENT_EMPTY (&grpc_static_mdelem_table[75])
 /* "vary": "" */
-#define GRPC_MDELEM_VARY_EMPTY (&grpc_static_mdelem_table[75])
+#define GRPC_MDELEM_VARY_EMPTY (&grpc_static_mdelem_table[76])
 /* "via": "" */
-#define GRPC_MDELEM_VIA_EMPTY (&grpc_static_mdelem_table[76])
+#define GRPC_MDELEM_VIA_EMPTY (&grpc_static_mdelem_table[77])
 /* "www-authenticate": "" */
-#define GRPC_MDELEM_WWW_AUTHENTICATE_EMPTY (&grpc_static_mdelem_table[77])
+#define GRPC_MDELEM_WWW_AUTHENTICATE_EMPTY (&grpc_static_mdelem_table[78])
 
 extern const uint8_t
     grpc_static_metadata_elem_indices[GRPC_STATIC_MDELEM_COUNT * 2];
diff --git a/src/core/lib/transport/transport.c b/src/core/lib/transport/transport.c
index 18256aae5e..53c634adca 100644
--- a/src/core/lib/transport/transport.c
+++ b/src/core/lib/transport/transport.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -35,6 +35,7 @@
 #include <grpc/support/alloc.h>
 #include <grpc/support/atm.h>
 #include <grpc/support/log.h>
+#include <grpc/support/sync.h>
 #include "src/core/lib/transport/transport_impl.h"
 
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
@@ -76,6 +77,24 @@ void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
   grpc_closure_init(&refcount->destroy, cb, cb_arg);
 }
 
+static void move64(uint64_t *from, uint64_t *to) {
+  *to += *from;
+  *from = 0;
+}
+
+void grpc_transport_move_one_way_stats(grpc_transport_one_way_stats *from,
+                                       grpc_transport_one_way_stats *to) {
+  move64(&from->framing_bytes, &to->framing_bytes);
+  move64(&from->data_bytes, &to->data_bytes);
+  move64(&from->header_bytes, &to->header_bytes);
+}
+
+void grpc_transport_move_stats(grpc_transport_stream_stats *from,
+                               grpc_transport_stream_stats *to) {
+  grpc_transport_move_one_way_stats(&from->incoming, &to->incoming);
+  grpc_transport_move_one_way_stats(&from->outgoing, &to->outgoing);
+}
+
 size_t grpc_transport_stream_size(grpc_transport *transport) {
   return transport->vtable->sizeof_stream;
 }
diff --git a/src/core/lib/transport/transport.h b/src/core/lib/transport/transport.h
index e98cfe9515..460e4dcedc 100644
--- a/src/core/lib/transport/transport.h
+++ b/src/core/lib/transport/transport.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -78,11 +78,32 @@ void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount);
   grpc_stream_ref_init(rc, ir, cb, cb_arg)
 #endif
 
+typedef struct {
+  uint64_t framing_bytes;
+  uint64_t data_bytes;
+  uint64_t header_bytes;
+} grpc_transport_one_way_stats;
+
+typedef struct grpc_transport_stream_stats {
+  grpc_transport_one_way_stats incoming;
+  grpc_transport_one_way_stats outgoing;
+} grpc_transport_stream_stats;
+
+void grpc_transport_move_one_way_stats(grpc_transport_one_way_stats *from,
+                                       grpc_transport_one_way_stats *to);
+
+void grpc_transport_move_stats(grpc_transport_stream_stats *from,
+                               grpc_transport_stream_stats *to);
+
 /* Transport stream op: a set of operations to perform on a transport
    against a single stream */
 typedef struct grpc_transport_stream_op {
-  /** Send initial metadata to the peer, from the provided metadata batch. */
+  /** Send initial metadata to the peer, from the provided metadata batch.
+      idempotent_request MUST be set if this is non-null */
   grpc_metadata_batch *send_initial_metadata;
+  /** Iff send_initial_metadata != NULL, flags if this is an idempotent request
+      or not */
+  bool send_idempotent_request;
 
   /** Send trailing metadata to the peer, from the provided metadata batch. */
   grpc_metadata_batch *send_trailing_metadata;
@@ -92,6 +113,7 @@ typedef struct grpc_transport_stream_op {
 
   /** Receive initial metadata from the stream, into provided metadata batch. */
   grpc_metadata_batch *recv_initial_metadata;
+  bool *recv_idempotent_request;
   /** Should be enqueued when initial metadata is ready to be processed. */
   grpc_closure *recv_initial_metadata_ready;
 
@@ -104,6 +126,9 @@ typedef struct grpc_transport_stream_op {
    */
   grpc_metadata_batch *recv_trailing_metadata;
 
+  /** Collect any stats into provided buffer, zero internal stat counters */
+  grpc_transport_stream_stats *collect_stats;
+
   /** Should be enqueued when all requested operations (excluding recv_message
       and recv_initial_metadata which have their own closures) in a given batch
       have been completed. */
diff --git a/src/core/lib/transport/transport_impl.h b/src/core/lib/transport/transport_impl.h
index 92fa5d519d..2ff67073af 100644
--- a/src/core/lib/transport/transport_impl.h
+++ b/src/core/lib/transport/transport_impl.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/transport/transport_op_string.c b/src/core/lib/transport/transport_op_string.c
index 1fa8fa5d4f..df04c61127 100644
--- a/src/core/lib/transport/transport_op_string.c
+++ b/src/core/lib/transport/transport_op_string.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/fake_transport_security.c b/src/core/lib/tsi/fake_transport_security.c
index 350cd9b648..a0f69c3d64 100644
--- a/src/core/lib/tsi/fake_transport_security.c
+++ b/src/core/lib/tsi/fake_transport_security.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/fake_transport_security.h b/src/core/lib/tsi/fake_transport_security.h
index b887dfcb09..54a9469b58 100644
--- a/src/core/lib/tsi/fake_transport_security.h
+++ b/src/core/lib/tsi/fake_transport_security.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/ssl_transport_security.c b/src/core/lib/tsi/ssl_transport_security.c
index 542f870d06..ef3aeb7090 100644
--- a/src/core/lib/tsi/ssl_transport_security.c
+++ b/src/core/lib/tsi/ssl_transport_security.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/ssl_transport_security.h b/src/core/lib/tsi/ssl_transport_security.h
index c9b9e8f54b..211c8f9656 100644
--- a/src/core/lib/tsi/ssl_transport_security.h
+++ b/src/core/lib/tsi/ssl_transport_security.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/ssl_types.h b/src/core/lib/tsi/ssl_types.h
index c6e68c01ad..0a988effd0 100644
--- a/src/core/lib/tsi/ssl_types.h
+++ b/src/core/lib/tsi/ssl_types.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/transport_security.c b/src/core/lib/tsi/transport_security.c
index edbbe0ed97..66f1e356d6 100644
--- a/src/core/lib/tsi/transport_security.c
+++ b/src/core/lib/tsi/transport_security.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/transport_security.h b/src/core/lib/tsi/transport_security.h
index 349dd0ae9c..aaf110ee05 100644
--- a/src/core/lib/tsi/transport_security.h
+++ b/src/core/lib/tsi/transport_security.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/tsi/transport_security_interface.h b/src/core/lib/tsi/transport_security_interface.h
index f88f1516a9..d81ec0963a 100644
--- a/src/core/lib/tsi/transport_security_interface.h
+++ b/src/core/lib/tsi/transport_security_interface.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/lb_policies/pick_first.h b/src/core/plugin_registry/grpc_plugin_registry.c
index dba86ea7ad..79df85516e 100644
--- a/src/core/lib/client_config/lb_policies/pick_first.h
+++ b/src/core/plugin_registry/grpc_plugin_registry.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,28 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_PICK_FIRST_H
-#define GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_PICK_FIRST_H
+#include <grpc/grpc.h>
 
-#include "src/core/lib/client_config/lb_policy_factory.h"
+extern void grpc_lb_policy_pick_first_init(void);
+extern void grpc_lb_policy_pick_first_shutdown(void);
+extern void grpc_lb_policy_round_robin_init(void);
+extern void grpc_lb_policy_round_robin_shutdown(void);
+extern void grpc_resolver_dns_native_init(void);
+extern void grpc_resolver_dns_native_shutdown(void);
+extern void grpc_resolver_sockaddr_init(void);
+extern void grpc_resolver_sockaddr_shutdown(void);
+extern void census_grpc_plugin_init(void);
+extern void census_grpc_plugin_shutdown(void);
 
-/** Returns a load balancing factory for the pick first policy, which picks up
- * the first subchannel from \a subchannels to succesfully connect */
-grpc_lb_policy_factory *grpc_pick_first_lb_factory_create();
-
-#endif /* GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_PICK_FIRST_H */
+void grpc_register_built_in_plugins(void) {
+  grpc_register_plugin(grpc_lb_policy_pick_first_init,
+                       grpc_lb_policy_pick_first_shutdown);
+  grpc_register_plugin(grpc_lb_policy_round_robin_init,
+                       grpc_lb_policy_round_robin_shutdown);
+  grpc_register_plugin(grpc_resolver_dns_native_init,
+                       grpc_resolver_dns_native_shutdown);
+  grpc_register_plugin(grpc_resolver_sockaddr_init,
+                       grpc_resolver_sockaddr_shutdown);
+  grpc_register_plugin(census_grpc_plugin_init,
+                       census_grpc_plugin_shutdown);
+}
diff --git a/src/core/lib/client_config/lb_policies/round_robin.h b/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
index 52db1caa0c..b3786c927d 100644
--- a/src/core/lib/client_config/lb_policies/round_robin.h
+++ b/src/core/plugin_registry/grpc_unsecure_plugin_registry.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,16 +31,28 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_ROUND_ROBIN_H
-#define GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_ROUND_ROBIN_H
+#include <grpc/grpc.h>
 
-#include "src/core/lib/client_config/lb_policy.h"
+extern void grpc_resolver_dns_native_init(void);
+extern void grpc_resolver_dns_native_shutdown(void);
+extern void grpc_resolver_sockaddr_init(void);
+extern void grpc_resolver_sockaddr_shutdown(void);
+extern void grpc_lb_policy_pick_first_init(void);
+extern void grpc_lb_policy_pick_first_shutdown(void);
+extern void grpc_lb_policy_round_robin_init(void);
+extern void grpc_lb_policy_round_robin_shutdown(void);
+extern void census_grpc_plugin_init(void);
+extern void census_grpc_plugin_shutdown(void);
 
-extern int grpc_lb_round_robin_trace;
-
-#include "src/core/lib/client_config/lb_policy_factory.h"
-
-/** Returns a load balancing factory for the round robin policy */
-grpc_lb_policy_factory *grpc_round_robin_lb_factory_create();
-
-#endif /* GRPC_CORE_LIB_CLIENT_CONFIG_LB_POLICIES_ROUND_ROBIN_H */
+void grpc_register_built_in_plugins(void) {
+  grpc_register_plugin(grpc_resolver_dns_native_init,
+                       grpc_resolver_dns_native_shutdown);
+  grpc_register_plugin(grpc_resolver_sockaddr_init,
+                       grpc_resolver_sockaddr_shutdown);
+  grpc_register_plugin(grpc_lb_policy_pick_first_init,
+                       grpc_lb_policy_pick_first_shutdown);
+  grpc_register_plugin(grpc_lb_policy_round_robin_init,
+                       grpc_lb_policy_round_robin_shutdown);
+  grpc_register_plugin(census_grpc_plugin_init,
+                       census_grpc_plugin_shutdown);
+}
diff --git a/src/cpp/client/channel.cc b/src/cpp/client/channel.cc
index f174676172..43b3875cb3 100644
--- a/src/cpp/client/channel.cc
+++ b/src/cpp/client/channel.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/client/client_context.cc b/src/cpp/client/client_context.cc
index de8b2db6e3..bf6423128a 100644
--- a/src/cpp/client/client_context.cc
+++ b/src/cpp/client/client_context.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/client/create_channel.cc b/src/cpp/client/create_channel.cc
index 76a1b31e2f..d0cc33b7a2 100644
--- a/src/cpp/client/create_channel.cc
+++ b/src/cpp/client/create_channel.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/client/credentials.cc b/src/cpp/client/credentials.cc
index 6fb620b0ea..e6a4f81b0d 100644
--- a/src/cpp/client/credentials.cc
+++ b/src/cpp/client/credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/client/insecure_credentials.cc b/src/cpp/client/insecure_credentials.cc
index efea02995a..13019a7117 100644
--- a/src/cpp/client/insecure_credentials.cc
+++ b/src/cpp/client/insecure_credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/client/secure_credentials.cc b/src/cpp/client/secure_credentials.cc
index cdc8406f24..269c523bba 100644
--- a/src/cpp/client/secure_credentials.cc
+++ b/src/cpp/client/secure_credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/client/secure_credentials.h b/src/cpp/client/secure_credentials.h
index fd82331a44..ae41ef8007 100644
--- a/src/cpp/client/secure_credentials.h
+++ b/src/cpp/client/secure_credentials.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/common/channel_arguments.cc b/src/cpp/common/channel_arguments.cc
index 3bdb4398ab..db3558f192 100644
--- a/src/cpp/common/channel_arguments.cc
+++ b/src/cpp/common/channel_arguments.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/common/completion_queue.cc b/src/cpp/common/completion_queue.cc
index 729dc33749..00cc102f92 100644
--- a/src/cpp/common/completion_queue.cc
+++ b/src/cpp/common/completion_queue.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/common/create_auth_context.h b/src/cpp/common/create_auth_context.h
index c53055503f..387407bfec 100644
--- a/src/cpp/common/create_auth_context.h
+++ b/src/cpp/common/create_auth_context.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/common/insecure_create_auth_context.cc b/src/cpp/common/insecure_create_auth_context.cc
index 7ec5d9bd12..258f02c2ad 100644
--- a/src/cpp/common/insecure_create_auth_context.cc
+++ b/src/cpp/common/insecure_create_auth_context.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/common/secure_channel_arguments.cc b/src/cpp/common/secure_channel_arguments.cc
index 82e02f0238..81ec251b92 100644
--- a/src/cpp/common/secure_channel_arguments.cc
+++ b/src/cpp/common/secure_channel_arguments.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/common/secure_create_auth_context.cc b/src/cpp/common/secure_create_auth_context.cc
index d7cf803fde..51ddea46a3 100644
--- a/src/cpp/common/secure_create_auth_context.cc
+++ b/src/cpp/common/secure_create_auth_context.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/server/server.cc b/src/cpp/server/server.cc
index 7e5f557ffa..3e44c502fc 100644
--- a/src/cpp/server/server.cc
+++ b/src/cpp/server/server.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -264,6 +264,7 @@ class Server::SyncRequest GRPC_FINAL : public CompletionQueueTag {
   void* const tag_;
   bool in_flight_;
   const bool has_request_payload_;
+  uint32_t incoming_flags_;
   grpc_call* call_;
   grpc_call_details* call_details_;
   gpr_timespec deadline_;
@@ -334,7 +335,7 @@ bool Server::RegisterService(const grpc::string* host, Service* service) {
     }
     RpcServiceMethod* method = it->get();
     void* tag = grpc_server_register_method(server_, method->name(),
-                                            host ? host->c_str() : nullptr);
+                                            host ? host->c_str() : nullptr, 0);
     if (tag == nullptr) {
       gpr_log(GPR_DEBUG, "Attempt to register %s multiple times",
               method->name());
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 1947d68e3e..68cc38258c 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index 0422650953..e05a7df28a 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer.cc
index 3a2318d1a6..c0a14de418 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/util/string_ref.cc b/src/cpp/util/string_ref.cc
index b55019b5f2..a16601de5d 100644
--- a/src/cpp/util/string_ref.cc
+++ b/src/cpp/util/string_ref.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/cpp/util/time.cc b/src/cpp/util/time.cc
index bb5fce389d..c43d848cc6 100644
--- a/src/cpp/util/time.cc
+++ b/src/cpp/util/time.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/.nuget/packages.config b/src/csharp/.nuget/packages.config
index 89a310ac56..acb43ae4b3 100644
--- a/src/csharp/.nuget/packages.config
+++ b/src/csharp/.nuget/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NUnit.Runners" version="2.6.4" />
-  <package id="OpenCover" version="4.6.166" />
-  <package id="ReportGenerator" version="2.3.2.0" />
+  <package id="OpenCover" version="4.6.519" />
+  <package id="ReportGenerator" version="2.4.4.0" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs b/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
index 1837f5c74b..96d6ee87ae 100644
--- a/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
+++ b/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.csproj b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
index 8dd12b50ef..3acea7d2f8 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.csproj
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.csproj
@@ -9,7 +9,7 @@
     <AssemblyName>Grpc.Auth</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <DocumentationFile>bin\$(Configuration)\Grpc.Auth.Xml</DocumentationFile>
-    <NuGetPackageImportStamp>4f8487a9</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>455903a2</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -39,43 +39,30 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Google.Apis.Auth, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.10.0.25331, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.10.0\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Net.Http.WebRequest" />
-    <Reference Include="BouncyCastle.Crypto">
-      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
-    <Reference Include="System.Net.Http.Extensions">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="System.Net.Http.Primitives">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
-    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
@@ -93,15 +80,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="app.config" />
     <None Include="Grpc.Auth.nuspec" />
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
-  </Target>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
index f1f8f7c709..4baed3704c 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
@@ -15,7 +15,7 @@
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2 Auth OAuth2</tags>
 	<dependencies>
-	  <dependency id="Google.Apis.Auth" version="1.9.3" />
+	  <dependency id="Google.Apis.Auth" version="1.11.1" />
 	  <dependency id="Grpc.Core" version="$version$" />
     </dependencies>
   </metadata>
diff --git a/src/csharp/Grpc.Auth/app.config b/src/csharp/Grpc.Auth/app.config
deleted file mode 100644
index 84d7534d65..0000000000
--- a/src/csharp/Grpc.Auth/app.config
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.28.0" newVersion="4.0.0.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Core" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.9.2.38523" newVersion="1.9.2.38523" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Auth/packages.config b/src/csharp/Grpc.Auth/packages.config
index 5fe8ca616c..c20d9ceed6 100644
--- a/src/csharp/Grpc.Auth/packages.config
+++ b/src/csharp/Grpc.Auth/packages.config
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.10.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.10.0" targetFramework="net45" />
-  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
-  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
index 7e73c4f181..3bfd49b10f 100644
--- a/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
+++ b/src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj
@@ -93,6 +93,7 @@
     <Compile Include="MetadataTest.cs" />
     <Compile Include="PerformanceTest.cs" />
     <Compile Include="SanityTest.cs" />
+    <Compile Include="HalfcloseTest.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
diff --git a/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs b/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs
index fac93fcc5c..ab12c120cb 100644
--- a/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs
+++ b/src/csharp/Grpc.Core.Tests/GrpcEnvironmentTest.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core.Tests/HalfcloseTest.cs b/src/csharp/Grpc.Core.Tests/HalfcloseTest.cs
new file mode 100644
index 0000000000..fe6edb858b
--- /dev/null
+++ b/src/csharp/Grpc.Core.Tests/HalfcloseTest.cs
@@ -0,0 +1,97 @@
+#region Copyright notice and license
+
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+using NUnit.Framework;
+
+namespace Grpc.Core.Tests
+{
+    public class HalfcloseTest
+    {
+        MockServiceHelper helper;
+        Server server;
+        Channel channel;
+
+        [SetUp]
+        public void Init()
+        {
+            helper = new MockServiceHelper();
+
+            server = helper.GetServer();
+            server.Start();
+            channel = helper.GetChannel();
+        }
+
+        [TearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        /// <summary>
+        /// For client streaming and duplex streaming calls, if server does a full close
+        /// before we halfclose the request stream, an attempt to halfclose
+        /// (complete the request stream) shouldn't be treated as an error.
+        /// </summary>
+        [Test]
+        public async Task HalfcloseAfterFullclose_ClientStreamingCall()
+        {
+            helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
+            {
+                return "PASS";
+            });
+
+            var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall());
+            // make sure server has fullclosed on us
+            Assert.AreEqual("PASS", await call.ResponseAsync);
+
+            // sending close from client should be still fine because server can finish
+            // the call anytime and we cannot do anything about it on the client side.
+            await call.RequestStream.CompleteAsync();
+
+            // Second attempt to close from client is not allowed.
+            Assert.Throws(typeof(InvalidOperationException), async () => await call.RequestStream.CompleteAsync());
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs b/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs
index d5a1eeb0fb..543f6375df 100644
--- a/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs
+++ b/src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core.Tests/PInvokeTest.cs b/src/csharp/Grpc.Core.Tests/PInvokeTest.cs
index da0ea2e6dc..d2b2fc6a66 100644
--- a/src/csharp/Grpc.Core.Tests/PInvokeTest.cs
+++ b/src/csharp/Grpc.Core.Tests/PInvokeTest.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -74,6 +74,8 @@ namespace Grpc.Core.Tests
         /// (~110ns .NET Windows)
         /// </summary>
         [Test]
+        [Category("Performance")]
+        [Ignore("Prevent running on Jenkins")]
         public void NativeCallbackBenchmark()
         {
             OpCompletionDelegate handler = Handler;
@@ -95,6 +97,8 @@ namespace Grpc.Core.Tests
         /// (~1.1us on .NET Windows)
         /// </summary>
         [Test]
+        [Category("Performance")]
+        [Ignore("Prevent running on Jenkins")]
         public void NewNativeCallbackBenchmark()
         {
             counter = 0;
@@ -112,6 +116,8 @@ namespace Grpc.Core.Tests
         /// (~46ns .NET Windows)
         /// </summary>
         [Test]
+        [Category("Performance")]
+        [Ignore("Prevent running on Jenkins")]
         public void NopPInvokeBenchmark()
         {
             BenchmarkUtil.RunBenchmark(
diff --git a/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs b/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
index 5ba06d6509..1ad2290928 100644
--- a/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
+++ b/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/CallCredentials.cs b/src/csharp/Grpc.Core/CallCredentials.cs
index 7cd41d0480..7476b0ca16 100644
--- a/src/csharp/Grpc.Core/CallCredentials.cs
+++ b/src/csharp/Grpc.Core/CallCredentials.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/CallInvocationDetails.cs b/src/csharp/Grpc.Core/CallInvocationDetails.cs
index 52bfbe6edb..98db854614 100644
--- a/src/csharp/Grpc.Core/CallInvocationDetails.cs
+++ b/src/csharp/Grpc.Core/CallInvocationDetails.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/CallOptions.cs b/src/csharp/Grpc.Core/CallOptions.cs
index 7bd95d4ba8..caf8210d91 100644
--- a/src/csharp/Grpc.Core/CallOptions.cs
+++ b/src/csharp/Grpc.Core/CallOptions.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Channel.cs b/src/csharp/Grpc.Core/Channel.cs
index d7a482d86f..89981b1849 100644
--- a/src/csharp/Grpc.Core/Channel.cs
+++ b/src/csharp/Grpc.Core/Channel.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/ChannelCredentials.cs b/src/csharp/Grpc.Core/ChannelCredentials.cs
index 03cda28400..db0cefef8b 100644
--- a/src/csharp/Grpc.Core/ChannelCredentials.cs
+++ b/src/csharp/Grpc.Core/ChannelCredentials.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/ChannelOptions.cs b/src/csharp/Grpc.Core/ChannelOptions.cs
index 65e15e21e9..b6eeceabc4 100644
--- a/src/csharp/Grpc.Core/ChannelOptions.cs
+++ b/src/csharp/Grpc.Core/ChannelOptions.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/ContextPropagationToken.cs b/src/csharp/Grpc.Core/ContextPropagationToken.cs
index c0f638f837..935498246a 100644
--- a/src/csharp/Grpc.Core/ContextPropagationToken.cs
+++ b/src/csharp/Grpc.Core/ContextPropagationToken.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index 86b37b8660..a5c78cc9d7 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCall.cs b/src/csharp/Grpc.Core/Internal/AsyncCall.cs
index 2caba260b3..016e1b8587 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCall.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCall.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
@@ -258,9 +258,19 @@ namespace Grpc.Core.Internal
             lock (myLock)
             {
                 GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
-                CheckSendingAllowed();
+                CheckSendingAllowed(allowFinished: true);
 
-                call.StartSendCloseFromClient(HandleHalfclosed);
+                if (!disposed && !finished)
+                {
+                    call.StartSendCloseFromClient(HandleSendCloseFromClientFinished);
+                }
+                else
+                {
+                    // In case the call has already been finished by the serverside,
+                    // the halfclose has already been done implicitly, so we only
+                    // emit the notification for the completion delegate.
+                    Task.Run(() => HandleSendCloseFromClientFinished(true));
+                }
 
                 halfcloseRequested = true;
                 sendCompletionDelegate = completionDelegate;
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs b/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
index 45d4c3e078..ccd047f469 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCallBase.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
@@ -136,7 +136,7 @@ namespace Grpc.Core.Internal
             lock (myLock)
             {
                 GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
-                CheckSendingAllowed();
+                CheckSendingAllowed(allowFinished: false);
 
                 call.StartSendMessage(HandleSendFinished, payload, writeFlags, !initialMetadataSent);
 
@@ -202,14 +202,14 @@ namespace Grpc.Core.Internal
         {
         }
 
-        protected void CheckSendingAllowed()
+        protected void CheckSendingAllowed(bool allowFinished)
         {
             GrpcPreconditions.CheckState(started);
             CheckNotCancelled();
-            GrpcPreconditions.CheckState(!disposed);
+            GrpcPreconditions.CheckState(!disposed || allowFinished);
 
             GrpcPreconditions.CheckState(!halfcloseRequested, "Already halfclosed.");
-            GrpcPreconditions.CheckState(!finished, "Already finished.");
+            GrpcPreconditions.CheckState(!finished || allowFinished, "Already finished.");
             GrpcPreconditions.CheckState(sendCompletionDelegate == null, "Only one write can be pending at a time");
         }
 
@@ -294,9 +294,33 @@ namespace Grpc.Core.Internal
         }
 
         /// <summary>
-        /// Handles halfclose completion.
+        /// Handles halfclose (send close from client) completion.
+        /// </summary>
+        protected void HandleSendCloseFromClientFinished(bool success)
+        {
+            AsyncCompletionDelegate<object> origCompletionDelegate = null;
+            lock (myLock)
+            {
+                origCompletionDelegate = sendCompletionDelegate;
+                sendCompletionDelegate = null;
+
+                ReleaseResourcesIfPossible();
+            }
+
+            if (!success)
+            {
+                FireCompletion(origCompletionDelegate, null, new InvalidOperationException("Sending close from client has failed."));
+            }
+            else
+            {
+                FireCompletion(origCompletionDelegate, null, null);
+            }
+        }
+
+        /// <summary>
+        /// Handles send status from server completion.
         /// </summary>
-        protected void HandleHalfclosed(bool success)
+        protected void HandleSendStatusFromServerFinished(bool success)
         {
             AsyncCompletionDelegate<object> origCompletionDelegate = null;
             lock (myLock)
@@ -309,7 +333,7 @@ namespace Grpc.Core.Internal
 
             if (!success)
             {
-                FireCompletion(origCompletionDelegate, null, new InvalidOperationException("Halfclose failed"));
+                FireCompletion(origCompletionDelegate, null, new InvalidOperationException("Error sending status from server."));
             }
             else
             {
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs b/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs
index 9380c0d0ea..bea2b3660c 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCallServer.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
@@ -113,7 +113,7 @@ namespace Grpc.Core.Internal
 
                 GrpcPreconditions.CheckState(!initialMetadataSent, "Response headers can only be sent once per call.");
                 GrpcPreconditions.CheckState(streamingWritesCounter == 0, "Response headers can only be sent before the first write starts.");
-                CheckSendingAllowed();
+                CheckSendingAllowed(allowFinished: false);
 
                 GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
 
@@ -137,11 +137,11 @@ namespace Grpc.Core.Internal
             lock (myLock)
             {
                 GrpcPreconditions.CheckNotNull(completionDelegate, "Completion delegate cannot be null");
-                CheckSendingAllowed();
+                CheckSendingAllowed(allowFinished: false);
 
                 using (var metadataArray = MetadataArraySafeHandle.Create(trailers))
                 {
-                    call.StartSendStatusFromServer(HandleHalfclosed, status, metadataArray, !initialMetadataSent);
+                    call.StartSendStatusFromServer(HandleSendStatusFromServerFinished, status, metadataArray, !initialMetadataSent);
                 }
                 halfcloseRequested = true;
                 readingDone = true;
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs b/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs
index d5bbf676ff..7e86fddb4d 100644
--- a/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs
+++ b/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs b/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
index 0e2108f0f2..66d2a66f99 100644
--- a/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/CStringSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CStringSafeHandle.cs
index 4ae57aa773..0221798d2a 100644
--- a/src/csharp/Grpc.Core/Internal/CStringSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CStringSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/CallCredentialsSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CallCredentialsSafeHandle.cs
index 0f36337f11..3095a34008 100644
--- a/src/csharp/Grpc.Core/Internal/CallCredentialsSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CallCredentialsSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
index bc045b67b1..500653ba5d 100644
--- a/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CallSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/ChannelArgsSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ChannelArgsSafeHandle.cs
index f6aa710b21..0038024245 100644
--- a/src/csharp/Grpc.Core/Internal/ChannelArgsSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ChannelArgsSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
index 65cc2e019f..c85f55241a 100644
--- a/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ChannelCredentialsSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs
index 2199905cc6..1dbd1f4e34 100644
--- a/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/CompletionQueueEvent.cs b/src/csharp/Grpc.Core/Internal/CompletionQueueEvent.cs
index 36a92ecd8e..288680792a 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionQueueEvent.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionQueueEvent.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs b/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
index 5c75b52e23..91364cdc70 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionQueueSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
index 3a293e1626..628844f242 100644
--- a/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
+++ b/src/csharp/Grpc.Core/Internal/CompletionRegistry.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs b/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
index dfaee5d9d7..aa4dafd7f2 100644
--- a/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
+++ b/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/Enums.cs b/src/csharp/Grpc.Core/Internal/Enums.cs
index 098e7c0e99..74f86d2a30 100644
--- a/src/csharp/Grpc.Core/Internal/Enums.cs
+++ b/src/csharp/Grpc.Core/Internal/Enums.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs b/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
index 81760d7a10..25735d5262 100644
--- a/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/MetadataArraySafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index 282816d51e..bff1e56582 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/NativeLogRedirector.cs b/src/csharp/Grpc.Core/Internal/NativeLogRedirector.cs
index 4bbbb4808c..3fcf8673ee 100644
--- a/src/csharp/Grpc.Core/Internal/NativeLogRedirector.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeLogRedirector.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs b/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
index e810ffcdd0..0e4d9070d3 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 19a573581e..9ee0ba3bc0 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/PlatformApis.cs b/src/csharp/Grpc.Core/Internal/PlatformApis.cs
index fb1acfb607..5d8c44b589 100644
--- a/src/csharp/Grpc.Core/Internal/PlatformApis.cs
+++ b/src/csharp/Grpc.Core/Internal/PlatformApis.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs b/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs
index ccf144de2d..1f83e51548 100644
--- a/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerCallHandler.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
index a50f357990..24f686fddc 100644
--- a/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerCredentialsSafeHandle.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs b/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
index a57fb3b789..6b5f70e220 100644
--- a/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
+++ b/src/csharp/Grpc.Core/Internal/ServerSafeHandle.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/Timespec.cs b/src/csharp/Grpc.Core/Internal/Timespec.cs
index 754be4e035..56172a5dda 100644
--- a/src/csharp/Grpc.Core/Internal/Timespec.cs
+++ b/src/csharp/Grpc.Core/Internal/Timespec.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
index e763c15025..47308f8c9e 100644
--- a/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
+++ b/src/csharp/Grpc.Core/Internal/UnmanagedLibrary.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/KeyCertificatePair.cs b/src/csharp/Grpc.Core/KeyCertificatePair.cs
index 0fb6817986..a8f3bb073d 100644
--- a/src/csharp/Grpc.Core/KeyCertificatePair.cs
+++ b/src/csharp/Grpc.Core/KeyCertificatePair.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Logging/ConsoleLogger.cs b/src/csharp/Grpc.Core/Logging/ConsoleLogger.cs
index d41b1b9f26..da74e55a95 100644
--- a/src/csharp/Grpc.Core/Logging/ConsoleLogger.cs
+++ b/src/csharp/Grpc.Core/Logging/ConsoleLogger.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Marshaller.cs b/src/csharp/Grpc.Core/Marshaller.cs
index 5847248c1a..d86e75b3cb 100644
--- a/src/csharp/Grpc.Core/Marshaller.cs
+++ b/src/csharp/Grpc.Core/Marshaller.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Metadata.cs b/src/csharp/Grpc.Core/Metadata.cs
index 52cef96f40..e982fa0c48 100644
--- a/src/csharp/Grpc.Core/Metadata.cs
+++ b/src/csharp/Grpc.Core/Metadata.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Method.cs b/src/csharp/Grpc.Core/Method.cs
index 3870076f7f..0cf041be2b 100644
--- a/src/csharp/Grpc.Core/Method.cs
+++ b/src/csharp/Grpc.Core/Method.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Profiling/Profilers.cs b/src/csharp/Grpc.Core/Profiling/Profilers.cs
index 8a181447d6..aa0d96c0e0 100644
--- a/src/csharp/Grpc.Core/Profiling/Profilers.cs
+++ b/src/csharp/Grpc.Core/Profiling/Profilers.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Server.cs b/src/csharp/Grpc.Core/Server.cs
index 5d0fc6b1f0..5b61b7f060 100644
--- a/src/csharp/Grpc.Core/Server.cs
+++ b/src/csharp/Grpc.Core/Server.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/ServerCredentials.cs b/src/csharp/Grpc.Core/ServerCredentials.cs
index 456d331c9c..ace4820027 100644
--- a/src/csharp/Grpc.Core/ServerCredentials.cs
+++ b/src/csharp/Grpc.Core/ServerCredentials.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/ServerPort.cs b/src/csharp/Grpc.Core/ServerPort.cs
index 10ddcb782f..afae0846dd 100644
--- a/src/csharp/Grpc.Core/ServerPort.cs
+++ b/src/csharp/Grpc.Core/ServerPort.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs b/src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs
index 76bf04ce8b..fcfe97a09b 100644
--- a/src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs
+++ b/src/csharp/Grpc.Core/Utils/GrpcPreconditions.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/Version.cs b/src/csharp/Grpc.Core/Version.cs
index 6d88438a07..8a26bd8362 100644
--- a/src/csharp/Grpc.Core/Version.cs
+++ b/src/csharp/Grpc.Core/Version.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.Core/VersionInfo.cs b/src/csharp/Grpc.Core/VersionInfo.cs
index 4bd4f204dd..9014a13f40 100644
--- a/src/csharp/Grpc.Core/VersionInfo.cs
+++ b/src/csharp/Grpc.Core/VersionInfo.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs b/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
index c3fac05324..8318e84277 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
+++ b/src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.HealthCheck.Tests/HealthServiceImplTest.cs b/src/csharp/Grpc.HealthCheck.Tests/HealthServiceImplTest.cs
index 47e4b7c2a7..a4b79e3a7d 100644
--- a/src/csharp/Grpc.HealthCheck.Tests/HealthServiceImplTest.cs
+++ b/src/csharp/Grpc.HealthCheck.Tests/HealthServiceImplTest.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs b/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs
index 21482b302b..a6e82aa0d4 100644
--- a/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs
+++ b/src/csharp/Grpc.HealthCheck/HealthServiceImpl.cs
@@ -1,5 +1,5 @@
 #region Copyright notice and license
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
index f37c1464c3..339a754c02 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj
@@ -9,7 +9,7 @@
     <AssemblyName>Grpc.IntegrationTesting.Client</AssemblyName>
     <StartupObject>Grpc.IntegrationTesting.Client.Program</StartupObject>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <NuGetPackageImportStamp>6d22e68f</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>dfa56e6c</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -43,28 +43,17 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.10.0.25331, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.10.0\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks, Version=1.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop, Version=1.0.168.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -73,12 +62,6 @@
     <Reference Include="System" />
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
-    <Reference Include="System.Net.Http.Extensions">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="System.Net.Http.Primitives">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
-    </Reference>
     <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
@@ -100,14 +83,6 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
-  </Target>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/app.config b/src/csharp/Grpc.IntegrationTesting.Client/app.config
deleted file mode 100644
index 84d7534d65..0000000000
--- a/src/csharp/Grpc.IntegrationTesting.Client/app.config
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.28.0" newVersion="4.0.0.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Core" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.9.2.38523" newVersion="1.9.2.38523" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Client/packages.config b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
index 5fe8ca616c..c20d9ceed6 100644
--- a/src/csharp/Grpc.IntegrationTesting.Client/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Client/packages.config
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.10.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.10.0" targetFramework="net45" />
-  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
-  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config b/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config
index 940d25cae3..e204447bb3 100644
--- a/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config
+++ b/src/csharp/Grpc.IntegrationTesting.QpsWorker/app.config
@@ -6,6 +6,10 @@
         <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
       </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="Google.Apis.Core" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-1.11.1.0" newVersion="1.11.1.0" />
+      </dependentAssembly>
     </assemblyBinding>
   </runtime>
 </configuration>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
index f27b96a53f..27a5650308 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
+++ b/src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj
@@ -9,7 +9,7 @@
     <AssemblyName>Grpc.IntegrationTesting.Server</AssemblyName>
     <StartupObject>Grpc.IntegrationTesting.Server.Program</StartupObject>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <NuGetPackageImportStamp>d9ee8e52</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>7ceb739e</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -43,28 +43,17 @@
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.10.0.25331, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.10.0\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks, Version=1.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop, Version=1.0.168.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -73,12 +62,6 @@
     <Reference Include="System" />
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
-    <Reference Include="System.Net.Http.Extensions">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="System.Net.Http.Primitives">
-      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
-    </Reference>
     <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
@@ -100,14 +83,6 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
-  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
-  </Target>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/app.config b/src/csharp/Grpc.IntegrationTesting.Server/app.config
deleted file mode 100644
index 84d7534d65..0000000000
--- a/src/csharp/Grpc.IntegrationTesting.Server/app.config
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.28.0" newVersion="4.0.0.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Core" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.9.2.38523" newVersion="1.9.2.38523" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting.Server/packages.config b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
index 5fe8ca616c..c20d9ceed6 100644
--- a/src/csharp/Grpc.IntegrationTesting.Server/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting.Server/packages.config
@@ -1,11 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.10.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.10.0" targetFramework="net45" />
-  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
-  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/BenchmarkServiceImpl.cs b/src/csharp/Grpc.IntegrationTesting/BenchmarkServiceImpl.cs
index 47a15224f1..7e7bc713a0 100644
--- a/src/csharp/Grpc.IntegrationTesting/BenchmarkServiceImpl.cs
+++ b/src/csharp/Grpc.IntegrationTesting/BenchmarkServiceImpl.cs
@@ -46,16 +46,13 @@ namespace Grpc.Testing
     /// </summary>
     public class BenchmarkServiceImpl : BenchmarkService.IBenchmarkService
     {
-        private readonly int responseSize;
-
-        public BenchmarkServiceImpl(int responseSize)
+        public BenchmarkServiceImpl()
         {
-            this.responseSize = responseSize;
         }
 
         public Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
         {
-            var response = new SimpleResponse { Payload = CreateZerosPayload(responseSize) };
+            var response = new SimpleResponse { Payload = CreateZerosPayload(request.ResponseSize) };
             return Task.FromResult(response);
         }
 
@@ -63,7 +60,7 @@ namespace Grpc.Testing
         {
             await requestStream.ForEachAsync(async request =>
             {
-                var response = new SimpleResponse { Payload = CreateZerosPayload(responseSize) };
+                var response = new SimpleResponse { Payload = CreateZerosPayload(request.ResponseSize) };
                 await responseStream.WriteAsync(response);
             });
         }
diff --git a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
index c4016012cb..5bfc89d591 100644
--- a/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ClientRunners.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Google.Protobuf;
 using Grpc.Core;
+using Grpc.Core.Logging;
 using Grpc.Core.Utils;
 using NUnit.Framework;
 using Grpc.Testing;
@@ -50,42 +51,65 @@ namespace Grpc.IntegrationTesting
     /// <summary>
     /// Helper methods to start client runners for performance testing.
     /// </summary>
-    public static class ClientRunners
+    public class ClientRunners
     {
+        static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<ClientRunners>();
+
         /// <summary>
         /// Creates a started client runner.
         /// </summary>
         public static IClientRunner CreateStarted(ClientConfig config)
         {
+            Logger.Debug("ClientConfig: {0}", config);
             string target = config.ServerTargets.Single();
-            GrpcPreconditions.CheckArgument(config.LoadParams.LoadCase == LoadParams.LoadOneofCase.ClosedLoop);
+            GrpcPreconditions.CheckArgument(config.LoadParams.LoadCase == LoadParams.LoadOneofCase.ClosedLoop,
+                "Only closed loop scenario supported for C#");
+            GrpcPreconditions.CheckArgument(config.ClientChannels == 1, "ClientConfig.ClientChannels needs to be 1");
 
-            var credentials = config.SecurityParams != null ? TestCredentials.CreateSslCredentials() : ChannelCredentials.Insecure;
-            var channel = new Channel(target, credentials);
+            if (config.OutstandingRpcsPerChannel != 0)
+            {
+                Logger.Warning("ClientConfig.OutstandingRpcsPerChannel is not supported for C#. Ignoring the value");
+            }
+            if (config.AsyncClientThreads != 0)
+            {
+                Logger.Warning("ClientConfig.AsyncClientThreads is not supported for C#. Ignoring the value");
+            }
+            if (config.CoreLimit != 0)
+            {
+                Logger.Warning("ClientConfig.CoreLimit is not supported for C#. Ignoring the value");
+            }
+            if (config.CoreList.Count > 0)
+            {
+                Logger.Warning("ClientConfig.CoreList is not supported for C#. Ignoring the value");
+            }
 
-            switch (config.RpcType)
+            var credentials = config.SecurityParams != null ? TestCredentials.CreateSslCredentials() : ChannelCredentials.Insecure;
+            List<ChannelOption> channelOptions = null;
+            if (config.SecurityParams != null && config.SecurityParams.ServerHostOverride != "")
             {
-                case RpcType.UNARY:
-                    return new SyncUnaryClientRunner(channel,
-                        config.PayloadConfig.SimpleParams.ReqSize,
-                        config.HistogramParams);
-
-                case RpcType.STREAMING:
-                default:
-                    throw new ArgumentException("Unsupported RpcType.");
+                channelOptions = new List<ChannelOption>
+                {
+                    new ChannelOption(ChannelOptions.SslTargetNameOverride, config.SecurityParams.ServerHostOverride)
+                };
             }
+            var channel = new Channel(target, credentials, channelOptions);
+
+            return new ClientRunnerImpl(channel,
+                config.ClientType,
+                config.RpcType,
+                config.PayloadConfig,
+                config.HistogramParams);
         }
     }
 
-    /// <summary>
-    /// Client that starts synchronous unary calls in a closed loop.
-    /// </summary>
-    public class SyncUnaryClientRunner : IClientRunner
+    public class ClientRunnerImpl : IClientRunner
     {
         const double SecondsToNanos = 1e9;
 
         readonly Channel channel;
-        readonly int payloadSize;
+        readonly ClientType clientType;
+        readonly RpcType rpcType;
+        readonly PayloadConfig payloadConfig;
         readonly Histogram histogram;
 
         readonly BenchmarkService.IBenchmarkServiceClient client;
@@ -93,15 +117,19 @@ namespace Grpc.IntegrationTesting
         readonly CancellationTokenSource stoppedCts;
         readonly WallClockStopwatch wallClockStopwatch = new WallClockStopwatch();
         
-        public SyncUnaryClientRunner(Channel channel, int payloadSize, HistogramParams histogramParams)
+        public ClientRunnerImpl(Channel channel, ClientType clientType, RpcType rpcType, PayloadConfig payloadConfig, HistogramParams histogramParams)
         {
             this.channel = GrpcPreconditions.CheckNotNull(channel);
-            this.payloadSize = payloadSize;
+            this.clientType = clientType;
+            this.rpcType = rpcType;
+            this.payloadConfig = payloadConfig;
             this.histogram = new Histogram(histogramParams.Resolution, histogramParams.MaxPossible);
 
             this.stoppedCts = new CancellationTokenSource();
             this.client = BenchmarkService.NewClient(channel);
-            this.runnerTask = Task.Factory.StartNew(Run, TaskCreationOptions.LongRunning);
+
+            var threadBody = GetThreadBody();
+            this.runnerTask = Task.Factory.StartNew(threadBody, TaskCreationOptions.LongRunning);
         }
 
         public ClientStats GetStats(bool reset)
@@ -126,12 +154,9 @@ namespace Grpc.IntegrationTesting
             await channel.ShutdownAsync();
         }
 
-        private void Run()
+        private void RunClosedLoopUnary()
         {
-            var request = new SimpleRequest
-            {
-                Payload = CreateZerosPayload(payloadSize)
-            };
+            var request = CreateSimpleRequest();
             var stopwatch = new Stopwatch();
 
             while (!stoppedCts.Token.IsCancellationRequested)
@@ -145,6 +170,124 @@ namespace Grpc.IntegrationTesting
             }
         }
 
+        private async Task RunClosedLoopUnaryAsync()
+        {
+            var request = CreateSimpleRequest();
+            var stopwatch = new Stopwatch();
+
+            while (!stoppedCts.Token.IsCancellationRequested)
+            {
+                stopwatch.Restart();
+                await client.UnaryCallAsync(request);
+                stopwatch.Stop();
+
+                // spec requires data point in nanoseconds.
+                histogram.AddObservation(stopwatch.Elapsed.TotalSeconds * SecondsToNanos);
+            }
+        }
+
+        private async Task RunClosedLoopStreamingAsync()
+        {
+            var request = CreateSimpleRequest();
+            var stopwatch = new Stopwatch();
+
+            using (var call = client.StreamingCall())
+            {
+                while (!stoppedCts.Token.IsCancellationRequested)
+                {
+                    stopwatch.Restart();
+                    await call.RequestStream.WriteAsync(request);
+                    await call.ResponseStream.MoveNext();
+                    stopwatch.Stop();
+
+                    // spec requires data point in nanoseconds.
+                    histogram.AddObservation(stopwatch.Elapsed.TotalSeconds * SecondsToNanos);
+                }
+
+                // finish the streaming call
+                await call.RequestStream.CompleteAsync();
+                Assert.IsFalse(await call.ResponseStream.MoveNext());
+            }
+        }
+
+        private async Task RunGenericClosedLoopStreamingAsync()
+        {
+            var request = CreateByteBufferRequest();
+            var stopwatch = new Stopwatch();
+
+            var callDetails = new CallInvocationDetails<byte[], byte[]>(channel, GenericService.StreamingCallMethod, new CallOptions());
+
+            using (var call = Calls.AsyncDuplexStreamingCall(callDetails))
+            {
+                while (!stoppedCts.Token.IsCancellationRequested)
+                {
+                    stopwatch.Restart();
+                    await call.RequestStream.WriteAsync(request);
+                    await call.ResponseStream.MoveNext();
+                    stopwatch.Stop();
+
+                    // spec requires data point in nanoseconds.
+                    histogram.AddObservation(stopwatch.Elapsed.TotalSeconds * SecondsToNanos);
+                }
+
+                // finish the streaming call
+                await call.RequestStream.CompleteAsync();
+                Assert.IsFalse(await call.ResponseStream.MoveNext());
+            }
+        }
+
+        private Action GetThreadBody()
+        {
+            if (payloadConfig.PayloadCase == PayloadConfig.PayloadOneofCase.BytebufParams)
+            {
+                GrpcPreconditions.CheckArgument(clientType == ClientType.ASYNC_CLIENT, "Generic client only supports async API");
+                GrpcPreconditions.CheckArgument(rpcType == RpcType.STREAMING, "Generic client only supports streaming calls");
+                return () =>
+                {
+                    RunGenericClosedLoopStreamingAsync().Wait();
+                };
+            }
+
+            GrpcPreconditions.CheckNotNull(payloadConfig.SimpleParams);
+            if (clientType == ClientType.SYNC_CLIENT)
+            {
+                GrpcPreconditions.CheckArgument(rpcType == RpcType.UNARY, "Sync client can only be used for Unary calls in C#");
+                return RunClosedLoopUnary;
+            }
+            else if (clientType == ClientType.ASYNC_CLIENT)
+            {
+                switch (rpcType)
+                {
+                    case RpcType.UNARY:
+                        return () =>
+                        {
+                            RunClosedLoopUnaryAsync().Wait();
+                        };
+                    case RpcType.STREAMING:
+                        return () =>
+                        {
+                            RunClosedLoopStreamingAsync().Wait();
+                        };
+                }
+            }
+            throw new ArgumentException("Unsupported configuration.");
+        }
+
+        private SimpleRequest CreateSimpleRequest()
+        {
+            GrpcPreconditions.CheckNotNull(payloadConfig.SimpleParams);
+            return new SimpleRequest
+            {
+                Payload = CreateZerosPayload(payloadConfig.SimpleParams.ReqSize),
+                ResponseSize = payloadConfig.SimpleParams.RespSize
+            };
+        }
+
+        private byte[] CreateByteBufferRequest()
+        {
+            return new byte[payloadConfig.BytebufParams.ReqSize];
+        }
+
         private static Payload CreateZerosPayload(int size)
         {
             return new Payload { Body = ByteString.CopyFrom(new byte[size]) };
diff --git a/src/csharp/Grpc.IntegrationTesting/GenericService.cs b/src/csharp/Grpc.IntegrationTesting/GenericService.cs
new file mode 100644
index 0000000000..c6128264ac
--- /dev/null
+++ b/src/csharp/Grpc.IntegrationTesting/GenericService.cs
@@ -0,0 +1,71 @@
+#region Copyright notice and license
+
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Google.Protobuf;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using NUnit.Framework;
+using Grpc.Testing;
+
+namespace Grpc.IntegrationTesting
+{
+    /// <summary>
+    /// Utility methods for defining and calling a service that doesn't use protobufs
+    /// for serialization/deserialization.
+    /// </summary>
+    public static class GenericService
+    {
+        readonly static Marshaller<byte[]> ByteArrayMarshaller = new Marshaller<byte[]>((b) => b, (b) => b);
+
+        public readonly static Method<byte[], byte[]> StreamingCallMethod = new Method<byte[], byte[]>(
+            MethodType.DuplexStreaming,
+            "grpc.testing.BenchmarkService",
+            "StreamingCall",
+            ByteArrayMarshaller,
+            ByteArrayMarshaller
+        );
+
+        public static ServerServiceDefinition BindHandler(DuplexStreamingServerMethod<byte[], byte[]> handler)
+        {
+            return ServerServiceDefinition.CreateBuilder(StreamingCallMethod.ServiceName)
+                .AddMethod(StreamingCallMethod, handler).Build();
+        }
+    }
+}
diff --git a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
index 372991374e..d3c572fe27 100644
--- a/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
+++ b/src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj
@@ -8,7 +8,7 @@
     <RootNamespace>Grpc.IntegrationTesting</RootNamespace>
     <AssemblyName>Grpc.IntegrationTesting</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <NuGetPackageImportStamp>6566287f</NuGetPackageImportStamp>
+    <NuGetPackageImportStamp>3a1c655d</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -38,20 +38,24 @@
     <AssemblyOriginatorKeyFile>..\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
+    </Reference>
     <Reference Include="CommandLine">
       <HintPath>..\packages\CommandLineParser.1.9.71\lib\net45\CommandLine.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Auth, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.10.0.25333, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Auth.1.10.0\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Auth.1.11.1\lib\net45\Google.Apis.Auth.PlatformServices.dll</HintPath>
     </Reference>
-    <Reference Include="Google.Apis.Core, Version=1.10.0.25331, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+    <Reference Include="Google.Apis.Core, Version=1.11.1.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Google.Apis.Core.1.10.0\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
+      <HintPath>..\packages\Google.Apis.Core.1.11.1\lib\net45\Google.Apis.Core.dll</HintPath>
     </Reference>
     <Reference Include="Google.Protobuf, Version=3.0.0.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -60,6 +64,10 @@
     <Reference Include="Moq">
       <HintPath>..\packages\Moq.4.2.1510.2205\lib\net40\Moq.dll</HintPath>
     </Reference>
+    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
     <Reference Include="nunit.framework">
       <HintPath>..\packages\NUnit.2.6.4\lib\nunit.framework.dll</HintPath>
     </Reference>
@@ -71,21 +79,6 @@
     <Reference Include="System.Net" />
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Net.Http.WebRequest" />
-    <Reference Include="BouncyCastle.Crypto">
-      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop">
-      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
-    </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
-    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
@@ -120,6 +113,7 @@
     <Compile Include="WorkerServiceImpl.cs" />
     <Compile Include="QpsWorker.cs" />
     <Compile Include="WallClockStopwatch.cs" />
+    <Compile Include="GenericService.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
@@ -133,8 +127,9 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <None Include="app.config" />
-    <None Include="packages.config" />
+    <None Include="packages.config">
+      <SubType>Designer</SubType>
+    </None>
     <None Include="data\README">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
@@ -151,11 +146,4 @@
   <ItemGroup>
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
-  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
-  </Target>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/Histogram.cs b/src/csharp/Grpc.IntegrationTesting/Histogram.cs
index 08a674d817..28d1f078a9 100644
--- a/src/csharp/Grpc.IntegrationTesting/Histogram.cs
+++ b/src/csharp/Grpc.IntegrationTesting/Histogram.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs b/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
index 0d12c4168c..5facb87971 100644
--- a/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs b/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs
index e407792c4b..a7c9fa894d 100644
--- a/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs
+++ b/src/csharp/Grpc.IntegrationTesting/QpsWorker.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs b/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs
index 06d5ee93d8..13ab5a25ab 100644
--- a/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -55,14 +55,7 @@ namespace Grpc.IntegrationTesting
         {
             var serverConfig = new ServerConfig
             {
-                ServerType = ServerType.ASYNC_SERVER,
-                PayloadConfig = new PayloadConfig
-                {
-                    SimpleParams = new SimpleProtoParams
-                    {
-                        RespSize = 100
-                    }
-                }
+                ServerType = ServerType.ASYNC_SERVER
             };
             serverRunner = ServerRunners.CreateStarted(serverConfig);
         }
@@ -88,7 +81,8 @@ namespace Grpc.IntegrationTesting
                 {
                     SimpleParams = new SimpleProtoParams
                     {
-                        ReqSize = 100
+                        ReqSize = 100,
+                        RespSize = 100
                     }
                 },
                 HistogramParams = new HistogramParams
diff --git a/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs b/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
index 4a73645e6c..d7859443e0 100644
--- a/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
+++ b/src/csharp/Grpc.IntegrationTesting/ServerRunners.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Google.Protobuf;
 using Grpc.Core;
+using Grpc.Core.Logging;
 using Grpc.Core.Utils;
 using NUnit.Framework;
 using Grpc.Testing;
@@ -50,27 +51,78 @@ namespace Grpc.IntegrationTesting
     /// <summary>
     /// Helper methods to start server runners for performance testing.
     /// </summary>
-    public static class ServerRunners
+    public class ServerRunners
     {
+        static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<ServerRunners>();
+
         /// <summary>
         /// Creates a started server runner.
         /// </summary>
         public static IServerRunner CreateStarted(ServerConfig config)
         {
-            GrpcPreconditions.CheckArgument(config.ServerType == ServerType.ASYNC_SERVER);
+            Logger.Debug("ServerConfig: {0}", config);
             var credentials = config.SecurityParams != null ? TestCredentials.CreateSslServerCredentials() : ServerCredentials.Insecure;
 
-            // TODO: qps_driver needs to setup payload properly...
-            int responseSize = config.PayloadConfig != null ? config.PayloadConfig.SimpleParams.RespSize : 0;
+            if (config.AsyncServerThreads != 0)
+            {
+                Logger.Warning("ServerConfig.AsyncServerThreads is not supported for C#. Ignoring the value");
+            }
+            if (config.CoreLimit != 0)
+            {
+                Logger.Warning("ServerConfig.CoreLimit is not supported for C#. Ignoring the value");
+            }
+            if (config.CoreList.Count > 0)
+            {
+                Logger.Warning("ServerConfig.CoreList is not supported for C#. Ignoring the value");
+            }
+
+            ServerServiceDefinition service = null;
+            if (config.ServerType == ServerType.ASYNC_SERVER)
+            {
+                GrpcPreconditions.CheckArgument(config.PayloadConfig == null,
+                    "ServerConfig.PayloadConfig shouldn't be set for BenchmarkService based server.");    
+                service = BenchmarkService.BindService(new BenchmarkServiceImpl());
+            }
+            else if (config.ServerType == ServerType.ASYNC_GENERIC_SERVER)
+            {
+                var genericService = new GenericServiceImpl(config.PayloadConfig.BytebufParams.RespSize);
+                service = GenericService.BindHandler(genericService.StreamingCall);
+            }
+            else
+            {
+                throw new ArgumentException("Unsupported ServerType");
+            }
+
             var server = new Server
             {
-                Services = { BenchmarkService.BindService(new BenchmarkServiceImpl(responseSize)) },
+                Services = { service },
                 Ports = { new ServerPort("[::]", config.Port, credentials) }
             };
 
             server.Start();
             return new ServerRunnerImpl(server);
         }
+
+        private class GenericServiceImpl
+        {
+            readonly byte[] response;
+
+            public GenericServiceImpl(int responseSize)
+            {
+                this.response = new byte[responseSize];
+            }
+
+            /// <summary>
+            /// Generic streaming call handler.
+            /// </summary>
+            public async Task StreamingCall(IAsyncStreamReader<byte[]> requestStream, IServerStreamWriter<byte[]> responseStream, ServerCallContext context)
+            {
+                await requestStream.ForEachAsync(async request =>
+                {
+                    await responseStream.WriteAsync(response);
+                });
+            }
+        }
     }
 
     /// <summary>
@@ -119,6 +171,5 @@ namespace Grpc.IntegrationTesting
         {
             return server.ShutdownAsync();
         }
-    }
-        
+    }        
 }
diff --git a/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs b/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs
index cab299a137..e5ad0caa03 100644
--- a/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs
+++ b/src/csharp/Grpc.IntegrationTesting/WorkerServiceImpl.cs
@@ -1,6 +1,6 @@
 #region Copyright notice and license
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/Grpc.IntegrationTesting/app.config b/src/csharp/Grpc.IntegrationTesting/app.config
deleted file mode 100644
index 84d7534d65..0000000000
--- a/src/csharp/Grpc.IntegrationTesting/app.config
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.29.0" newVersion="4.2.29.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.Net.Http" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.2.28.0" newVersion="4.0.0.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="Google.Apis.Core" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-1.9.2.38523" newVersion="1.9.2.38523" />
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>
\ No newline at end of file
diff --git a/src/csharp/Grpc.IntegrationTesting/packages.config b/src/csharp/Grpc.IntegrationTesting/packages.config
index 462dc9d604..0ae8bf4e70 100644
--- a/src/csharp/Grpc.IntegrationTesting/packages.config
+++ b/src/csharp/Grpc.IntegrationTesting/packages.config
@@ -2,14 +2,10 @@
 <packages>
   <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
   <package id="CommandLineParser" version="1.9.71" targetFramework="net45" />
-  <package id="Google.Apis.Auth" version="1.10.0" targetFramework="net45" />
-  <package id="Google.Apis.Core" version="1.10.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.11.1" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.11.1" targetFramework="net45" />
   <package id="Google.Protobuf" version="3.0.0-beta2" targetFramework="net45" />
   <package id="Ix-Async" version="1.2.5" targetFramework="net45" />
-  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
-  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
-  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
   <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
   <package id="NUnit" version="2.6.4" targetFramework="net45" />
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 642dc9ef42..8d769e5f6a 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/generate_proto_csharp.sh b/src/csharp/generate_proto_csharp.sh
index 23e0540253..9ac770b79d 100755
--- a/src/csharp/generate_proto_csharp.sh
+++ b/src/csharp/generate_proto_csharp.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/csharp/tests.json b/src/csharp/tests.json
index 4aa93668ad..d66cb1b100 100644
--- a/src/csharp/tests.json
+++ b/src/csharp/tests.json
@@ -21,6 +21,7 @@
     "Grpc.Core.Tests.CompressionTest",
     "Grpc.Core.Tests.ContextPropagationTest",
     "Grpc.Core.Tests.GrpcEnvironmentTest",
+    "Grpc.Core.Tests.HalfcloseTest",
     "Grpc.Core.Tests.MarshallingErrorsTest",
     "Grpc.Core.Tests.MetadataTest",
     "Grpc.Core.Tests.NUnitVersionTest",
diff --git a/src/node/ext/byte_buffer.cc b/src/node/ext/byte_buffer.cc
index 0f7edada14..8e0b6916e9 100644
--- a/src/node/ext/byte_buffer.cc
+++ b/src/node/ext/byte_buffer.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/ext/call.cc b/src/node/ext/call.cc
index da312886ce..9f023b5883 100644
--- a/src/node/ext/call.cc
+++ b/src/node/ext/call.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/ext/call_credentials.cc b/src/node/ext/call_credentials.cc
index bd2d146bbc..3c8f0c56da 100644
--- a/src/node/ext/call_credentials.cc
+++ b/src/node/ext/call_credentials.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/ext/call_credentials.h b/src/node/ext/call_credentials.h
index 1f35595f3d..04c852bea1 100644
--- a/src/node/ext/call_credentials.h
+++ b/src/node/ext/call_credentials.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index 0c71b2d610..b988f29878 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/ext/timeval.cc b/src/node/ext/timeval.cc
index c8f8534cfa..9284db62ef 100644
--- a/src/node/ext/timeval.cc
+++ b/src/node/ext/timeval.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/health_check/health.js b/src/node/health_check/health.js
index 6ab4157183..5236683088 100644
--- a/src/node/health_check/health.js
+++ b/src/node/health_check/health.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/index.js b/src/node/index.js
index 1c197729d7..d345a5142d 100644
--- a/src/node/index.js
+++ b/src/node/index.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -87,6 +87,10 @@ var loadObject = exports.loadObject;
  *   Buffers. Defaults to false
  * - longsAsStrings: deserialize long values as strings instead of objects.
  *   Defaults to true
+ * - deprecatedArgumentOrder: Use the beta method argument order for client
+ *   methods, with optional arguments after the callback. Defaults to false.
+ *   This option is only a temporary stopgap measure to smooth an API breakage.
+ *   It is deprecated, and new code should not use it.
  * @param {string|{root: string, file: string}} filename The file to load
  * @param {string=} format The file format to expect. Must be either 'proto' or
  *     'json'. Defaults to 'proto'
diff --git a/src/node/interop/async_delay_queue.js b/src/node/interop/async_delay_queue.js
index df57209637..5df1e00921 100644
--- a/src/node/interop/async_delay_queue.js
+++ b/src/node/interop/async_delay_queue.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/interop/interop_client.js b/src/node/interop/interop_client.js
index 5602011a8e..e8f2d37bd8 100644
--- a/src/node/interop/interop_client.js
+++ b/src/node/interop/interop_client.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -286,7 +286,7 @@ function cancelAfterFirstResponse(client, done) {
 function timeoutOnSleepingServer(client, done) {
   var deadline = new Date();
   deadline.setMilliseconds(deadline.getMilliseconds() + 1);
-  var call = client.fullDuplexCall(null, {deadline: deadline});
+  var call = client.fullDuplexCall({deadline: deadline});
   call.write({
     payload: {body: zeroBuffer(27182)}
   });
@@ -316,10 +316,10 @@ function customMetadata(client, done) {
       body: zeroBuffer(271828)
     }
   };
-  var unary = client.unaryCall(arg, function(err, resp) {
+  var unary = client.unaryCall(arg, metadata, function(err, resp) {
     assert.ifError(err);
     done();
-  }, metadata);
+  });
   unary.on('metadata', function(metadata) {
     assert.deepEqual(metadata.get(ECHO_INITIAL_KEY),
                      ['test_initial_metadata_value']);
@@ -455,14 +455,14 @@ function perRpcAuthTest(client, done, extra) {
       credential = credential.createScoped(scope);
     }
     var creds = grpc.credentials.createFromGoogleCredential(credential);
-    client.unaryCall(arg, function(err, resp) {
+    client.unaryCall(arg, {credentials: creds}, function(err, resp) {
       assert.ifError(err);
       assert.strictEqual(resp.username, SERVICE_ACCOUNT_EMAIL);
       assert(extra.oauth_scope.indexOf(resp.oauth_scope) > -1);
       if (done) {
         done();
       }
-    }, null, {credentials: creds});
+    });
   });
 }
 
@@ -545,6 +545,8 @@ var test_cases = {
                   Client: testProto.TestService}
 };
 
+exports.test_cases = test_cases;
+
 /**
  * Execute a single test case.
  * @param {string} address The address of the server to connect to, in the
diff --git a/src/node/interop/interop_server.js b/src/node/interop/interop_server.js
index c09481712a..7280762305 100644
--- a/src/node/interop/interop_server.js
+++ b/src/node/interop/interop_server.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/performance/benchmark_client.js b/src/node/performance/benchmark_client.js
index 80bec0b73e..262aa33862 100644
--- a/src/node/performance/benchmark_client.js
+++ b/src/node/performance/benchmark_client.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/performance/benchmark_server.js b/src/node/performance/benchmark_server.js
index b1b0bd12ab..70cee9979b 100644
--- a/src/node/performance/benchmark_server.js
+++ b/src/node/performance/benchmark_server.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/performance/worker.js b/src/node/performance/worker.js
index 7c8ab00026..98577bdbc9 100644
--- a/src/node/performance/worker.js
+++ b/src/node/performance/worker.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/performance/worker_service_impl.js b/src/node/performance/worker_service_impl.js
index 2c4651370f..17458e4b93 100644
--- a/src/node/performance/worker_service_impl.js
+++ b/src/node/performance/worker_service_impl.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/src/client.js b/src/node/src/client.js
index 2459e28321..5e07046fc6 100644
--- a/src/node/src/client.js
+++ b/src/node/src/client.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -50,6 +50,7 @@
 'use strict';
 
 var _ = require('lodash');
+var arguejs = require('arguejs');
 
 var grpc = require('./grpc_extension');
 
@@ -353,21 +354,23 @@ function makeUnaryRequestFunction(method, serialize, deserialize) {
    * @this {Client} Client object. Must have a channel member.
    * @param {*} argument The argument to the call. Should be serializable with
    *     serialize
-   * @param {function(?Error, value=)} callback The callback to for when the
-   *     response is received
    * @param {Metadata=} metadata Metadata to add to the call
    * @param {Object=} options Options map
+   * @param {function(?Error, value=)} callback The callback to for when the
+   *     response is received
    * @return {EventEmitter} An event emitter for stream related events
    */
-  function makeUnaryRequest(argument, callback, metadata, options) {
+  function makeUnaryRequest(argument, metadata, options, callback) {
     /* jshint validthis: true */
+    /* While the arguments are listed in the function signature, those variables
+     * are not used directly. Instead, ArgueJS processes the arguments
+     * object. This allows for simple handling of optional arguments in the
+     * middle of the argument list, and also provides type checking. */
+    var args = arguejs({argument: null, metadata: [Metadata, new Metadata()],
+                        options: [Object], callback: Function}, arguments);
     var emitter = new EventEmitter();
-    var call = getCall(this.$channel, method, options);
-    if (metadata === null || metadata === undefined) {
-      metadata = new Metadata();
-    } else {
-      metadata = metadata.clone();
-    }
+    var call = getCall(this.$channel, method, args.options);
+    metadata = args.metadata.clone();
     emitter.cancel = function cancel() {
       call.cancel();
     };
@@ -375,9 +378,9 @@ function makeUnaryRequestFunction(method, serialize, deserialize) {
       return call.getPeer();
     };
     var client_batch = {};
-    var message = serialize(argument);
-    if (options) {
-      message.grpcWriteFlags = options.flags;
+    var message = serialize(args.argument);
+    if (args.options) {
+      message.grpcWriteFlags = args.options.flags;
     }
     client_batch[grpc.opType.SEND_INITIAL_METADATA] =
         metadata._getCoreRepresentation();
@@ -395,7 +398,7 @@ function makeUnaryRequestFunction(method, serialize, deserialize) {
       if (status.code === grpc.status.OK) {
         if (err) {
           // Got a batch error, but OK status. Something went wrong
-          callback(err);
+          args.callback(err);
           return;
         } else {
           try {
@@ -414,9 +417,9 @@ function makeUnaryRequestFunction(method, serialize, deserialize) {
         error = new Error(status.details);
         error.code = status.code;
         error.metadata = status.metadata;
-        callback(error);
+        args.callback(error);
       } else {
-        callback(null, deserialized);
+        args.callback(null, deserialized);
       }
       emitter.emit('status', status);
       emitter.emit('metadata', Metadata._fromCoreRepresentation(
@@ -440,21 +443,23 @@ function makeClientStreamRequestFunction(method, serialize, deserialize) {
    * Make a client stream request with this method on the given channel with the
    * given callback, etc.
    * @this {Client} Client object. Must have a channel member.
-   * @param {function(?Error, value=)} callback The callback to for when the
-   *     response is received
    * @param {Metadata=} metadata Array of metadata key/value pairs to add to the
    *     call
    * @param {Object=} options Options map
+   * @param {function(?Error, value=)} callback The callback to for when the
+   *     response is received
    * @return {EventEmitter} An event emitter for stream related events
    */
-  function makeClientStreamRequest(callback, metadata, options) {
+  function makeClientStreamRequest(metadata, options, callback) {
     /* jshint validthis: true */
-    var call = getCall(this.$channel, method, options);
-    if (metadata === null || metadata === undefined) {
-      metadata = new Metadata();
-    } else {
-      metadata = metadata.clone();
-    }
+    /* While the arguments are listed in the function signature, those variables
+     * are not used directly. Instead, ArgueJS processes the arguments
+     * object. This allows for simple handling of optional arguments in the
+     * middle of the argument list, and also provides type checking. */
+    var args = arguejs({metadata: [Metadata, new Metadata()],
+                        options: [Object], callback: Function}, arguments);
+    var call = getCall(this.$channel, method, args.options);
+    metadata = args.metadata.clone();
     var stream = new ClientWritableStream(call, serialize);
     var metadata_batch = {};
     metadata_batch[grpc.opType.SEND_INITIAL_METADATA] =
@@ -481,7 +486,7 @@ function makeClientStreamRequestFunction(method, serialize, deserialize) {
       if (status.code === grpc.status.OK) {
         if (err) {
           // Got a batch error, but OK status. Something went wrong
-          callback(err);
+          args.callback(err);
           return;
         } else {
           try {
@@ -500,9 +505,9 @@ function makeClientStreamRequestFunction(method, serialize, deserialize) {
         error = new Error(response.status.details);
         error.code = status.code;
         error.metadata = status.metadata;
-        callback(error);
+        args.callback(error);
       } else {
-        callback(null, deserialized);
+        args.callback(null, deserialized);
       }
       stream.emit('status', status);
     });
@@ -533,17 +538,18 @@ function makeServerStreamRequestFunction(method, serialize, deserialize) {
    */
   function makeServerStreamRequest(argument, metadata, options) {
     /* jshint validthis: true */
-    var call = getCall(this.$channel, method, options);
-    if (metadata === null || metadata === undefined) {
-      metadata = new Metadata();
-    } else {
-      metadata = metadata.clone();
-    }
+    /* While the arguments are listed in the function signature, those variables
+     * are not used directly. Instead, ArgueJS processes the arguments
+     * object. */
+    var args = arguejs({argument: null, metadata: [Metadata, new Metadata()],
+                        options: [Object]}, arguments);
+    var call = getCall(this.$channel, method, args.options);
+    metadata = args.metadata.clone();
     var stream = new ClientReadableStream(call, deserialize);
     var start_batch = {};
-    var message = serialize(argument);
-    if (options) {
-      message.grpcWriteFlags = options.flags;
+    var message = serialize(args.argument);
+    if (args.options) {
+      message.grpcWriteFlags = args.options.flags;
     }
     start_batch[grpc.opType.SEND_INITIAL_METADATA] =
         metadata._getCoreRepresentation();
@@ -595,12 +601,13 @@ function makeBidiStreamRequestFunction(method, serialize, deserialize) {
    */
   function makeBidiStreamRequest(metadata, options) {
     /* jshint validthis: true */
-    var call = getCall(this.$channel, method, options);
-    if (metadata === null || metadata === undefined) {
-      metadata = new Metadata();
-    } else {
-      metadata = metadata.clone();
-    }
+    /* While the arguments are listed in the function signature, those variables
+     * are not used directly. Instead, ArgueJS processes the arguments
+     * object. */
+    var args = arguejs({metadata: [Metadata, new Metadata()],
+                        options: [Object]}, arguments);
+    var call = getCall(this.$channel, method, args.options);
+    metadata = args.metadata.clone();
     var stream = new ClientDuplexStream(call, serialize, deserialize);
     var start_batch = {};
     start_batch[grpc.opType.SEND_INITIAL_METADATA] =
@@ -643,6 +650,40 @@ var requester_makers = {
   bidi: makeBidiStreamRequestFunction
 };
 
+function getDefaultValues(metadata, options) {
+  var res = {};
+  res.metadata = metadata || new Metadata();
+  res.options = options || {};
+  return res;
+}
+
+/**
+ * Map with wrappers for each type of requester function to make it use the old
+ * argument order with optional arguments after the callback.
+ */
+var deprecated_request_wrap = {
+  unary: function(makeUnaryRequest) {
+    return function makeWrappedUnaryRequest(argument, callback,
+                                            metadata, options) {
+      /* jshint validthis: true */
+      var opt_args = getDefaultValues(metadata, metadata);
+      return makeUnaryRequest.call(this, argument, opt_args.metadata,
+                                   opt_args.options, callback);
+    };
+  },
+  client_stream: function(makeServerStreamRequest) {
+    return function makeWrappedClientStreamRequest(callback, metadata,
+                                                   options) {
+      /* jshint validthis: true */
+      var opt_args = getDefaultValues(metadata, options);
+      return makeServerStreamRequest.call(this, opt_args.metadata,
+                                          opt_args.options, callback);
+    };
+  },
+  server_stream: _.identity,
+  bidi: _.identity
+};
+
 /**
  * Creates a constructor for a client with the given methods. The methods object
  * maps method name to an object with the following keys:
@@ -654,9 +695,19 @@ var requester_makers = {
  * responseDeserialize: function to deserialize response objects
  * @param {Object} methods An object mapping method names to method attributes
  * @param {string} serviceName The fully qualified name of the service
+ * @param {Object} class_options An options object. Currently only uses the key
+ *     deprecatedArgumentOrder, a boolean that Indicates that the old argument
+ *     order should be used for methods, with optional arguments at the end
+ *     instead of the callback at the end. Defaults to false. This option is
+ *     only a temporary stopgap measure to smooth an API breakage.
+ *     It is deprecated, and new code should not use it.
  * @return {function(string, Object)} New client constructor
  */
-exports.makeClientConstructor = function(methods, serviceName) {
+exports.makeClientConstructor = function(methods, serviceName,
+                                         class_options) {
+  if (!class_options) {
+    class_options = {};
+  }
   /**
    * Create a client with the given methods
    * @constructor
@@ -703,8 +754,13 @@ exports.makeClientConstructor = function(methods, serviceName) {
     }
     var serialize = attrs.requestSerialize;
     var deserialize = attrs.responseDeserialize;
-    Client.prototype[name] = requester_makers[method_type](
+    var method_func = requester_makers[method_type](
         attrs.path, serialize, deserialize);
+    if (class_options.deprecatedArgumentOrder) {
+      Client.prototype[name] = deprecated_request_wrap(method_func);
+    } else {
+      Client.prototype[name] = method_func;
+    }
     // Associate all provided attributes with the method
     _.assign(Client.prototype[name], attrs);
   });
@@ -761,8 +817,13 @@ exports.waitForClientReady = function(client, deadline, callback) {
 exports.makeProtobufClientConstructor =  function(service, options) {
   var method_attrs = common.getProtobufServiceAttrs(service, service.name,
                                                     options);
+  var deprecatedArgumentOrder = false;
+  if (options) {
+    deprecatedArgumentOrder = options.deprecatedArgumentOrder;
+  }
   var Client = exports.makeClientConstructor(
-      method_attrs, common.fullyQualifiedName(service));
+      method_attrs, common.fullyQualifiedName(service),
+      deprecatedArgumentOrder);
   Client.service = service;
   Client.service.grpc_options = options;
   return Client;
diff --git a/src/node/src/common.js b/src/node/src/common.js
index 7705a275fc..8cf43b7a84 100644
--- a/src/node/src/common.js
+++ b/src/node/src/common.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index 97c4bd73ac..a12eade4e1 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/src/metadata.js b/src/node/src/metadata.js
index 33d7ea1cf7..612361b0ea 100644
--- a/src/node/src/metadata.js
+++ b/src/node/src/metadata.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/src/server.js b/src/node/src/server.js
index dd0bc12bc9..22128343a9 100644
--- a/src/node/src/server.js
+++ b/src/node/src/server.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/core/lib/client_config/resolvers/sockaddr_resolver.h b/src/node/stress/metrics_client.js
index 45c55bd160..dc8ef5e711 100644
--- a/src/core/lib/client_config/resolvers/sockaddr_resolver.h
+++ b/src/node/stress/metrics_client.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,20 +31,31 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_SOCKADDR_RESOLVER_H
-#define GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_SOCKADDR_RESOLVER_H
+'use strict';
 
-#include <grpc/support/port_platform.h>
+var grpc = require('../../..');
 
-#include "src/core/lib/client_config/resolver_factory.h"
+var proto = grpc.load(__dirname + '/../../proto/grpc/testing/metrics.proto');
+var metrics = proto.grpc.testing;
 
-grpc_resolver_factory *grpc_ipv4_resolver_factory_create(void);
+function main() {
+  var parseArgs = require('minimist');
+  var argv = parseArgs(process.argv, {
+    string: 'metrics_server_address',
+    boolean: 'total_only'
+  });
+  var client = new metrics.MetricsService(argv.metrics_server_address,
+                                          grpc.credentials.createInsecure());
+  if (argv.total_only) {
+    client.getGauge({name: 'qps'}, function(err, data) {
+      console.log(data.name + ':', data.long_value);
+    });
+  } else {
+    var call = client.getAllGauges({});
+    call.on('data', function(data) {
+      console.log(data.name + ':', data.long_value);
+    });
+  }
+}
 
-grpc_resolver_factory *grpc_ipv6_resolver_factory_create(void);
-
-#ifdef GPR_POSIX_SOCKET
-/** Create a unix resolver factory */
-grpc_resolver_factory *grpc_unix_resolver_factory_create(void);
-#endif
-
-#endif /* GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_SOCKADDR_RESOLVER_H */
+main();
diff --git a/src/core/lib/client_config/resolvers/dns_resolver.h b/src/node/stress/metrics_server.js
index eb46e41c77..3ab4b4c82d 100644
--- a/src/core/lib/client_config/resolvers/dns_resolver.h
+++ b/src/node/stress/metrics_server.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,57 @@
  *
  */
 
-#ifndef GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H
-#define GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H
+'use strict';
 
-#include "src/core/lib/client_config/resolver_factory.h"
+var _ = require('lodash');
 
-/** Create a dns resolver factory */
-grpc_resolver_factory *grpc_dns_resolver_factory_create(void);
+var grpc = require('../../..');
 
-#endif /* GRPC_CORE_LIB_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H */
+var proto = grpc.load(__dirname + '/../../proto/grpc/testing/metrics.proto');
+var metrics = proto.grpc.testing;
+
+function getGauge(call, callback) {
+  /* jshint validthis: true */
+  // Should be bound to a MetricsServer object
+  var name = call.request.name;
+  if (this.gauges.hasOwnProperty(name)) {
+    callback(null, _.assign({name: name}, this.gauges[name]()));
+  } else {
+    callback({code: grpc.status.NOT_FOUND,
+              details: 'No such gauge: ' + name});
+  }
+}
+
+function getAllGauges(call) {
+  /* jshint validthis: true */
+  // Should be bound to a MetricsServer object
+  _.each(this.gauges, function(getter, name) {
+    call.write(_.assign({name: name}, getter()));
+  });
+  call.end();
+}
+
+function MetricsServer(port) {
+  var server = new grpc.Server();
+  server.addProtoService(metrics.MetricsService.service, {
+    getGauge: _.bind(getGauge, this),
+    getAllGauges: _.bind(getAllGauges, this)
+  });
+  server.bind('localhost:' + port, grpc.ServerCredentials.createInsecure());
+  this.server = server;
+  this.gauges = {};
+}
+
+MetricsServer.prototype.start = function() {
+  this.server.start();
+}
+
+MetricsServer.prototype.registerGauge = function(name, getter) {
+  this.gauges[name] = getter;
+};
+
+MetricsServer.prototype.shutdown = function() {
+  this.server.forceShutdown();
+};
+
+module.exports = MetricsServer;
diff --git a/src/node/stress/stress_client.js b/src/node/stress/stress_client.js
new file mode 100644
index 0000000000..8332652e2a
--- /dev/null
+++ b/src/node/stress/stress_client.js
@@ -0,0 +1,126 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+'use strict';
+
+var _ = require('lodash');
+
+var grpc = require('../../..');
+
+var interop_client = require('../interop/interop_client');
+var MetricsServer = require('./metrics_server');
+
+var running;
+
+var metrics_server;
+
+var start_time;
+var query_count;
+
+function makeCall(client, test_cases) {
+  if (!running) {
+    return;
+  }
+  var test_case = test_cases[_.random(test_cases.length - 1)];
+  interop_client.test_cases[test_case].run(client, function() {
+    query_count += 1;
+    makeCall(client, test_cases);
+  });
+}
+
+function makeCalls(client, test_cases, parallel_calls_per_channel) {
+  _.times(parallel_calls_per_channel, function() {
+    makeCall(client, test_cases);
+  });
+}
+
+function getQps() {
+  var diff = process.hrtime(start_time);
+  var seconds = diff[0] + diff[1] / 1e9;
+  return {long_value: query_count / seconds};
+}
+
+function start(server_addresses, test_cases, channels_per_server,
+               parallel_calls_per_channel, metrics_port) {
+  running = true;
+  /* Assuming that we are not calling unimplemented_method. The client class
+   * used by empty_unary is (currently) the client class used by every interop
+   * test except unimplemented_method */
+  var Client = interop_client.test_cases.empty_unary.Client;
+  /* Make channels_per_server clients connecting to each server address */
+  var channels = _.flatten(_.times(
+      channels_per_server, _.partial(_.map, server_addresses, function(address) {
+        return new Client(address, grpc.credentials.createInsecure());
+      })));
+  metrics_server = new MetricsServer(metrics_port);
+  metrics_server.registerGauge('qps', getQps);
+  start_time = process.hrtime();
+  query_count = 0;
+  _.each(channels, _.partial(makeCalls, _, test_cases,
+                             parallel_calls_per_channel));
+  metrics_server.start();
+}
+
+function stop() {
+  running = false;
+  metrics_server.shutdown();
+  console.log('QPS: ' + getQps().long_value);
+}
+
+function main() {
+  var parseArgs = require('minimist');
+  var argv = parseArgs(process.argv, {
+    string: ['server_addresses', 'test_cases', 'metrics_port'],
+    default: {'server_addresses': 'localhost:8080',
+              'test_duration-secs': -1,
+              'num_channels_per_server': 1,
+              'num_stubs_per_channel': 1,
+              'metrics_port': '8081'}
+  });
+  var server_addresses = argv.server_addresses.split(',');
+  /* Generate an array of test cases, where the number of instances of each name
+   * corresponds to the number given in the argument.
+   * e.g. 'empty_unary:1,large_unary:2' =>
+   * ['empty_unary', 'large_unary', 'large_unary'] */
+  var test_cases = _.flatten(_.map(argv.test_cases.split(','), function(value) {
+    var split = value.split(':');
+    return _.times(split[1], _.constant(split[0]));
+  }));
+  start(server_addresses, test_cases, argv.num_channels_per_server,
+        argv.num_stubs_per_channel, argv.metrics_port);
+  if (argv['test_duration-secs'] > -1) {
+    setTimeout(stop, argv['test_duration-secs'] * 1000);
+  }
+}
+
+main();
diff --git a/src/node/test/call_test.js b/src/node/test/call_test.js
index 2300096d03..eb268603ea 100644
--- a/src/node/test/call_test.js
+++ b/src/node/test/call_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/channel_test.js b/src/node/test/channel_test.js
index c0ae2b769a..0cdb633659 100644
--- a/src/node/test/channel_test.js
+++ b/src/node/test/channel_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/common_test.js b/src/node/test/common_test.js
index 66a4205f82..c57b7388f6 100644
--- a/src/node/test/common_test.js
+++ b/src/node/test/common_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/constant_test.js b/src/node/test/constant_test.js
index 712c70706d..414b1ac9c0 100644
--- a/src/node/test/constant_test.js
+++ b/src/node/test/constant_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/credentials_test.js b/src/node/test/credentials_test.js
index 294600c85a..794215b246 100644
--- a/src/node/test/credentials_test.js
+++ b/src/node/test/credentials_test.js
@@ -398,18 +398,20 @@ describe('client credentials', function() {
           metadataUpdater);
     });
     it('Should update metadata on a unary call', function(done) {
-      var call = client.unary({}, function(err, data) {
-        assert.ifError(err);
-      }, null, {credentials: updater_creds});
+      var call = client.unary({}, {credentials: updater_creds},
+                              function(err, data) {
+                                assert.ifError(err);
+                              });
       call.on('metadata', function(metadata) {
         assert.deepEqual(metadata.get('plugin_key'), ['plugin_value']);
         done();
       });
     });
     it('should update metadata on a client streaming call', function(done) {
-      var call = client.clientStream(function(err, data) {
-        assert.ifError(err);
-      }, null, {credentials: updater_creds});
+      var call = client.clientStream({credentials: updater_creds},
+                                     function(err, data) {
+                                       assert.ifError(err);
+                                     });
       call.on('metadata', function(metadata) {
         assert.deepEqual(metadata.get('plugin_key'), ['plugin_value']);
         done();
@@ -417,7 +419,7 @@ describe('client credentials', function() {
       call.end();
     });
     it('should update metadata on a server streaming call', function(done) {
-      var call = client.serverStream({}, null, {credentials: updater_creds});
+      var call = client.serverStream({}, {credentials: updater_creds});
       call.on('data', function() {});
       call.on('metadata', function(metadata) {
         assert.deepEqual(metadata.get('plugin_key'), ['plugin_value']);
@@ -425,7 +427,7 @@ describe('client credentials', function() {
       });
     });
     it('should update metadata on a bidi streaming call', function(done) {
-      var call = client.bidiStream(null, {credentials: updater_creds});
+      var call = client.bidiStream({credentials: updater_creds});
       call.on('data', function() {});
       call.on('metadata', function(metadata) {
         assert.deepEqual(metadata.get('plugin_key'), ['plugin_value']);
@@ -443,9 +445,10 @@ describe('client credentials', function() {
           altMetadataUpdater);
       var combined_updater = grpc.credentials.combineCallCredentials(
           updater_creds, alt_updater_creds);
-      var call = client.unary({}, function(err, data) {
-        assert.ifError(err);
-      }, null, {credentials: combined_updater});
+      var call = client.unary({}, {credentials: combined_updater},
+                              function(err, data) {
+                                assert.ifError(err);
+                              });
       call.on('metadata', function(metadata) {
         assert.deepEqual(metadata.get('plugin_key'), ['plugin_value']);
         assert.deepEqual(metadata.get('other_plugin_key'),
diff --git a/src/node/test/echo_service.proto b/src/node/test/echo_service.proto
index 11b4f18c35..fc941a2904 100644
--- a/src/node/test/echo_service.proto
+++ b/src/node/test/echo_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/end_to_end_test.js b/src/node/test/end_to_end_test.js
index 353c6c761d..f127a41de9 100644
--- a/src/node/test/end_to_end_test.js
+++ b/src/node/test/end_to_end_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/server_test.js b/src/node/test/server_test.js
index 71a9647184..ed311c8605 100644
--- a/src/node/test/server_test.js
+++ b/src/node/test/server_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/surface_test.js b/src/node/test/surface_test.js
index edbfc0a288..b96e8e487c 100644
--- a/src/node/test/surface_test.js
+++ b/src/node/test/surface_test.js
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -404,18 +404,18 @@ describe('Echo metadata', function() {
     server.forceShutdown();
   });
   it('with unary call', function(done) {
-    var call = client.unary({}, function(err, data) {
+    var call = client.unary({}, metadata, function(err, data) {
       assert.ifError(err);
-    }, metadata);
+    });
     call.on('metadata', function(metadata) {
       assert.deepEqual(metadata.get('key'), ['value']);
       done();
     });
   });
   it('with client stream call', function(done) {
-    var call = client.clientStream(function(err, data) {
+    var call = client.clientStream(metadata, function(err, data) {
       assert.ifError(err);
-    }, metadata);
+    });
     call.on('metadata', function(metadata) {
       assert.deepEqual(metadata.get('key'), ['value']);
       done();
@@ -441,8 +441,8 @@ describe('Echo metadata', function() {
   });
   it('shows the correct user-agent string', function(done) {
     var version = require('../../../package.json').version;
-    var call = client.unary({}, function(err, data) { assert.ifError(err); },
-                            metadata);
+    var call = client.unary({}, metadata,
+                            function(err, data) { assert.ifError(err); });
     call.on('metadata', function(metadata) {
       assert(_.startsWith(metadata.get('user-agent')[0],
                           'grpc-node/' + version));
@@ -452,8 +452,8 @@ describe('Echo metadata', function() {
   it('properly handles duplicate values', function(done) {
     var dup_metadata = metadata.clone();
     dup_metadata.add('key', 'value2');
-    var call = client.unary({}, function(err, data) {assert.ifError(err); },
-                            dup_metadata);
+    var call = client.unary({}, dup_metadata,
+                            function(err, data) {assert.ifError(err); });
     call.on('metadata', function(resp_metadata) {
       // Two arrays are equal iff their symmetric difference is empty
       assert.deepEqual(_.xor(dup_metadata.get('key'), resp_metadata.get('key')),
@@ -954,7 +954,7 @@ describe('Call propagation', function() {
       done = multiDone(done, 2);
       var call;
       proxy_impl.unary = function(parent, callback) {
-        client.unary(parent.request, function(err, value) {
+        client.unary(parent.request, {parent: parent}, function(err, value) {
           try {
             assert(err);
             assert.strictEqual(err.code, grpc.status.CANCELLED);
@@ -962,7 +962,7 @@ describe('Call propagation', function() {
             callback(err, value);
             done();
           }
-        }, null, {parent: parent});
+        });
         call.cancel();
       };
       proxy.addProtoService(test_service, proxy_impl);
@@ -976,7 +976,7 @@ describe('Call propagation', function() {
       done = multiDone(done, 2);
       var call;
       proxy_impl.clientStream = function(parent, callback) {
-        client.clientStream(function(err, value) {
+        client.clientStream({parent: parent}, function(err, value) {
           try {
             assert(err);
             assert.strictEqual(err.code, grpc.status.CANCELLED);
@@ -984,7 +984,7 @@ describe('Call propagation', function() {
             callback(err, value);
             done();
           }
-        }, null, {parent: parent});
+        });
         call.cancel();
       };
       proxy.addProtoService(test_service, proxy_impl);
@@ -998,8 +998,7 @@ describe('Call propagation', function() {
       done = multiDone(done, 2);
       var call;
       proxy_impl.serverStream = function(parent) {
-        var child = client.serverStream(parent.request, null,
-                                        {parent: parent});
+        var child = client.serverStream(parent.request, {parent: parent});
         child.on('data', function() {});
         child.on('error', function(err) {
           assert(err);
@@ -1023,7 +1022,7 @@ describe('Call propagation', function() {
       done = multiDone(done, 2);
       var call;
       proxy_impl.bidiStream = function(parent) {
-        var child = client.bidiStream(null, {parent: parent});
+        var child = client.bidiStream({parent: parent});
         child.on('data', function() {});
         child.on('error', function(err) {
           assert(err);
@@ -1051,7 +1050,8 @@ describe('Call propagation', function() {
     it('With a client stream call', function(done) {
       done = multiDone(done, 2);
       proxy_impl.clientStream = function(parent, callback) {
-        client.clientStream(function(err, value) {
+        var options = {parent: parent, propagate_flags: deadline_flags};
+        client.clientStream(options, function(err, value) {
           try {
             assert(err);
             assert(err.code === grpc.status.DEADLINE_EXCEEDED ||
@@ -1060,7 +1060,7 @@ describe('Call propagation', function() {
             callback(err, value);
             done();
           }
-        }, null, {parent: parent, propagate_flags: deadline_flags});
+        });
       };
       proxy.addProtoService(test_service, proxy_impl);
       var proxy_port = proxy.bind('localhost:0', server_insecure_creds);
@@ -1069,15 +1069,15 @@ describe('Call propagation', function() {
                                     grpc.credentials.createInsecure());
       var deadline = new Date();
       deadline.setSeconds(deadline.getSeconds() + 1);
-      proxy_client.clientStream(function(err, value) {
+      proxy_client.clientStream({deadline: deadline}, function(err, value) {
         done();
-      }, null, {deadline: deadline});
+      });
     });
     it('With a bidi stream call', function(done) {
       done = multiDone(done, 2);
       proxy_impl.bidiStream = function(parent) {
         var child = client.bidiStream(
-            null, {parent: parent, propagate_flags: deadline_flags});
+            {parent: parent, propagate_flags: deadline_flags});
         child.on('data', function() {});
         child.on('error', function(err) {
           assert(err);
@@ -1093,7 +1093,7 @@ describe('Call propagation', function() {
                                     grpc.credentials.createInsecure());
       var deadline = new Date();
       deadline.setSeconds(deadline.getSeconds() + 1);
-      var call = proxy_client.bidiStream(null, {deadline: deadline});
+      var call = proxy_client.bidiStream({deadline: deadline});
       call.on('data', function() {});
       call.on('error', function(err) {
         done();
diff --git a/src/node/test/test_messages.proto b/src/node/test/test_messages.proto
index 9b8cb875ee..a1a6a32833 100644
--- a/src/node/test/test_messages.proto
+++ b/src/node/test/test_messages.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/node/test/test_service.proto b/src/node/test/test_service.proto
index 0ac2ae79a7..c86ce51d91 100644
--- a/src/node/test/test_service.proto
+++ b/src/node/test/test_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 51263b073c..1847d6016f 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.h b/src/objective-c/GRPCClient/private/GRPCChannel.h
index e49a6aca29..73bf8d95e7 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.h
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.m b/src/objective-c/GRPCClient/private/GRPCChannel.m
index d7de025e21..926f55048d 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.m
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
index 7b66cd4c32..fe3b8f39d1 100644
--- a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
+++ b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m
index d89602f7cb..539b5ab83c 100644
--- a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m
+++ b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.h b/src/objective-c/GRPCClient/private/GRPCHost.h
index 987d3e9f59..e58bb7a2d9 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.h
+++ b/src/objective-c/GRPCClient/private/GRPCHost.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.m b/src/objective-c/GRPCClient/private/GRPCHost.m
index 508cb20644..739d808c53 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.m
+++ b/src/objective-c/GRPCClient/private/GRPCHost.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/GRPCClient/private/GRPCReachabilityFlagNames.xmacro.h b/src/objective-c/GRPCClient/private/GRPCReachabilityFlagNames.xmacro.h
index 02871d5d02..4b92504b55 100644
--- a/src/objective-c/GRPCClient/private/GRPCReachabilityFlagNames.xmacro.h
+++ b/src/objective-c/GRPCClient/private/GRPCReachabilityFlagNames.xmacro.h
@@ -54,7 +54,9 @@
        GRPC_XMACRO_ITEM.
 #endif
 
+#if TARGET_OS_IPHONE
 GRPC_XMACRO_ITEM(isCell, IsWWAN)
+#endif
 GRPC_XMACRO_ITEM(reachable, Reachable)
 GRPC_XMACRO_ITEM(transientConnection, TransientConnection)
 GRPC_XMACRO_ITEM(connectionRequired, ConnectionRequired)
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index f6527e283c..16e5bff7ff 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/ProtoRPC/ProtoMethod.m b/src/objective-c/ProtoRPC/ProtoMethod.m
index 75e5efc23e..4b7ed63123 100644
--- a/src/objective-c/ProtoRPC/ProtoMethod.m
+++ b/src/objective-c/ProtoRPC/ProtoMethod.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/RxLibrary/GRXWriteable.m b/src/objective-c/RxLibrary/GRXWriteable.m
index 028ba9b551..c15ccb17fb 100644
--- a/src/objective-c/RxLibrary/GRXWriteable.m
+++ b/src/objective-c/RxLibrary/GRXWriteable.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.m b/src/objective-c/examples/Sample/Sample/ViewController.m
index a2bb3ee329..433a8a2ba3 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.m
+++ b/src/objective-c/examples/Sample/Sample/ViewController.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 7dd6873c80..9a8d425324 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/tests/InteropTestsLocalSSL.m b/src/objective-c/tests/InteropTestsLocalSSL.m
index 155e334ecb..f0f4b1d71f 100644
--- a/src/objective-c/tests/InteropTestsLocalSSL.m
+++ b/src/objective-c/tests/InteropTestsLocalSSL.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/tests/InteropTestsRemote.m b/src/objective-c/tests/InteropTestsRemote.m
index 00eadc25bc..758cc9346a 100644
--- a/src/objective-c/tests/InteropTestsRemote.m
+++ b/src/objective-c/tests/InteropTestsRemote.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/objective-c/tests/RxLibraryUnitTests.m b/src/objective-c/tests/RxLibraryUnitTests.m
index ae9465f58c..62fbdfcdf6 100644
--- a/src/objective-c/tests/RxLibraryUnitTests.m
+++ b/src/objective-c/tests/RxLibraryUnitTests.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/ext/grpc/LICENSE b/src/php/ext/grpc/LICENSE
index a8c47a2081..0c651a0287 100644
--- a/src/php/ext/grpc/LICENSE
+++ b/src/php/ext/grpc/LICENSE
@@ -1,4 +1,4 @@
-Copyright 2015-2016, Google Inc.
+Copyright 2015, Google Inc.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/src/php/ext/grpc/call.c b/src/php/ext/grpc/call.c
index 4f48d6f2e2..024ab70571 100644
--- a/src/php/ext/grpc/call.c
+++ b/src/php/ext/grpc/call.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index b7e7c26c10..eba2c81424 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/generated_code/AbstractGeneratedCodeTest.php b/src/php/tests/generated_code/AbstractGeneratedCodeTest.php
index f70525ef15..75922d4cf7 100644
--- a/src/php/tests/generated_code/AbstractGeneratedCodeTest.php
+++ b/src/php/tests/generated_code/AbstractGeneratedCodeTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/generated_code/math_client.php b/src/php/tests/generated_code/math_client.php
index 2085560d19..b8652ceb08 100644
--- a/src/php/tests/generated_code/math_client.php
+++ b/src/php/tests/generated_code/math_client.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/CallCredentials2Test.php b/src/php/tests/unit_tests/CallCredentials2Test.php
index 1282db6eed..a57e2b9b4e 100644
--- a/src/php/tests/unit_tests/CallCredentials2Test.php
+++ b/src/php/tests/unit_tests/CallCredentials2Test.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/CallCredentials3Test.php b/src/php/tests/unit_tests/CallCredentials3Test.php
index a458f1d322..6d98815d16 100644
--- a/src/php/tests/unit_tests/CallCredentials3Test.php
+++ b/src/php/tests/unit_tests/CallCredentials3Test.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/CallCredentialsTest.php b/src/php/tests/unit_tests/CallCredentialsTest.php
index 287024839d..5fec06cd13 100644
--- a/src/php/tests/unit_tests/CallCredentialsTest.php
+++ b/src/php/tests/unit_tests/CallCredentialsTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/CallTest.php b/src/php/tests/unit_tests/CallTest.php
index a2522fb120..1170a440fa 100755
--- a/src/php/tests/unit_tests/CallTest.php
+++ b/src/php/tests/unit_tests/CallTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/ChannelCredentialsTest.php b/src/php/tests/unit_tests/ChannelCredentialsTest.php
index 6d472dc876..1a42d69428 100644
--- a/src/php/tests/unit_tests/ChannelCredentialsTest.php
+++ b/src/php/tests/unit_tests/ChannelCredentialsTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/ChannelTest.php b/src/php/tests/unit_tests/ChannelTest.php
index acb8a0a70d..b6eac3109a 100644
--- a/src/php/tests/unit_tests/ChannelTest.php
+++ b/src/php/tests/unit_tests/ChannelTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/EndToEndTest.php b/src/php/tests/unit_tests/EndToEndTest.php
index 45f6708b1f..3fa92c950b 100755
--- a/src/php/tests/unit_tests/EndToEndTest.php
+++ b/src/php/tests/unit_tests/EndToEndTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/ServerTest.php b/src/php/tests/unit_tests/ServerTest.php
index cde6a9a8f7..d18f9abe9b 100644
--- a/src/php/tests/unit_tests/ServerTest.php
+++ b/src/php/tests/unit_tests/ServerTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/php/tests/unit_tests/TimevalTest.php b/src/php/tests/unit_tests/TimevalTest.php
index 9e4bc294da..43abba126a 100755
--- a/src/php/tests/unit_tests/TimevalTest.php
+++ b/src/php/tests/unit_tests/TimevalTest.php
@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/gen_build_yaml.py b/src/proto/gen_build_yaml.py
index e243d0defc..8e66939699 100755
--- a/src/proto/gen_build_yaml.py
+++ b/src/proto/gen_build_yaml.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python2.7
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/health/v1/health.proto b/src/proto/grpc/health/v1/health.proto
index 6e27606d1b..4ab30a0256 100644
--- a/src/proto/grpc/health/v1/health.proto
+++ b/src/proto/grpc/health/v1/health.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/testing/control.proto b/src/proto/grpc/testing/control.proto
index cc365cafe1..11e752a74b 100644
--- a/src/proto/grpc/testing/control.proto
+++ b/src/proto/grpc/testing/control.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/testing/duplicate/echo_duplicate.proto b/src/proto/grpc/testing/duplicate/echo_duplicate.proto
index 9d84de108e..94130ea767 100644
--- a/src/proto/grpc/testing/duplicate/echo_duplicate.proto
+++ b/src/proto/grpc/testing/duplicate/echo_duplicate.proto
@@ -1,5 +1,5 @@
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/testing/echo.proto b/src/proto/grpc/testing/echo.proto
index 06c3bafbad..0eef53a92a 100644
--- a/src/proto/grpc/testing/echo.proto
+++ b/src/proto/grpc/testing/echo.proto
@@ -1,5 +1,5 @@
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/testing/echo_messages.proto b/src/proto/grpc/testing/echo_messages.proto
index 5ce0a1fd64..1be1966f10 100644
--- a/src/proto/grpc/testing/echo_messages.proto
+++ b/src/proto/grpc/testing/echo_messages.proto
@@ -1,5 +1,5 @@
 
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/testing/metrics.proto b/src/proto/grpc/testing/metrics.proto
index df719afd99..0cc4b60239 100644
--- a/src/proto/grpc/testing/metrics.proto
+++ b/src/proto/grpc/testing/metrics.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/proto/grpc/testing/services.proto b/src/proto/grpc/testing/services.proto
index a2c5fda47e..f71dae34ee 100644
--- a/src/proto/grpc/testing/services.proto
+++ b/src/proto/grpc/testing/services.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 1d43547419..9e745701c1 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_adapter/_low.py b/src/python/grpcio/grpc/_adapter/_low.py
index 62fd52ab40..b13d8dd9dd 100644
--- a/src/python/grpcio/grpc/_adapter/_low.py
+++ b/src/python/grpcio/grpc/_adapter/_low.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_adapter/_types.py b/src/python/grpcio/grpc/_adapter/_types.py
index f9e18f0bb3..8ca7ff4b60 100644
--- a/src/python/grpcio/grpc/_adapter/_types.py
+++ b/src/python/grpcio/grpc/_adapter/_types.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
index d1b9c98ffc..1bfe6344e0 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
index d612c90791..c26bc083cf 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pxd.pxi
index 305475c006..a67c963684 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pxd.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
index 09e47d4222..cdae39d519 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/completion_queue.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
index 1d7adca23e..842635f56b 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/credentials.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 61165cb021..7696f8c7f7 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 6ecdcf7222..c2202bdab2 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/server.pxd.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/server.pxd.pxi
index a344230be4..a35eb5ea77 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/server.pxd.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/server.pxd.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
index a098f11da2..8419a59068 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pxd b/src/python/grpcio/grpc/_cython/cygrpc.pxd
index 61b0fa788f..9779534e38 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pxd
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pxd
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index 8a0f171ee7..8823ea5ef5 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
index 4d18369e1f..adcd8e954a 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -283,7 +283,7 @@ extern grpc_call_destroy_type grpc_call_destroy_import;
 typedef grpc_call_error(*grpc_server_request_call_type)(grpc_server *server, grpc_call **call, grpc_call_details *details, grpc_metadata_array *request_metadata, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
 extern grpc_server_request_call_type grpc_server_request_call_import;
 #define grpc_server_request_call grpc_server_request_call_import
-typedef void *(*grpc_server_register_method_type)(grpc_server *server, const char *method, const char *host);
+typedef void *(*grpc_server_register_method_type)(grpc_server *server, const char *method, const char *host, uint32_t flags);
 extern grpc_server_register_method_type grpc_server_register_method_import;
 #define grpc_server_register_method grpc_server_register_method_import
 typedef grpc_call_error(*grpc_server_request_registered_call_type)(grpc_server *server, void *registered_method, grpc_call **call, gpr_timespec *deadline, grpc_metadata_array *request_metadata, grpc_byte_buffer **optional_payload, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
diff --git a/src/python/grpcio/grpc/_links/invocation.py b/src/python/grpcio/grpc/_links/invocation.py
index 672e3e4cc8..003653e1c8 100644
--- a/src/python/grpcio/grpc/_links/invocation.py
+++ b/src/python/grpcio/grpc/_links/invocation.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/_links/service.py b/src/python/grpcio/grpc/_links/service.py
index e0f26a5b0f..11310e2240 100644
--- a/src/python/grpcio/grpc/_links/service.py
+++ b/src/python/grpcio/grpc/_links/service.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/beta/_server.py b/src/python/grpcio/grpc/beta/_server.py
index 12d16e6c18..eb0aadb42f 100644
--- a/src/python/grpcio/grpc/beta/_server.py
+++ b/src/python/grpcio/grpc/beta/_server.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/beta/implementations.py b/src/python/grpcio/grpc/beta/implementations.py
index a0ca330d2c..06ee7aa26e 100644
--- a/src/python/grpcio/grpc/beta/implementations.py
+++ b/src/python/grpcio/grpc/beta/implementations.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -61,15 +61,16 @@ class ChannelCredentials(object):
     self._low_credentials = low_credentials
 
 
-def ssl_channel_credentials(root_certificates, private_key, certificate_chain):
+def ssl_channel_credentials(root_certificates=None, private_key=None,
+                            certificate_chain=None):
   """Creates a ChannelCredentials for use with an SSL-enabled Channel.
 
   Args:
-    root_certificates: The PEM-encoded root certificates or None to ask for
+    root_certificates: The PEM-encoded root certificates or unset to ask for
       them to be retrieved from a default location.
-    private_key: The PEM-encoded private key to use or None if no private key
+    private_key: The PEM-encoded private key to use or unset if no private key
       should be used.
-    certificate_chain: The PEM-encoded certificate chain to use or None if no
+    certificate_chain: The PEM-encoded certificate chain to use or unset if no
       certificate chain should be used.
 
   Returns:
diff --git a/src/python/grpcio/grpc/beta/interfaces.py b/src/python/grpcio/grpc/beta/interfaces.py
index e29a5b3379..33ca45ac5b 100644
--- a/src/python/grpcio/grpc/beta/interfaces.py
+++ b/src/python/grpcio/grpc/beta/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/alpha/_face_utilities.py b/src/python/grpcio/grpc/framework/alpha/_face_utilities.py
index b5e4133cad..15c47d5c92 100644
--- a/src/python/grpcio/grpc/framework/alpha/_face_utilities.py
+++ b/src/python/grpcio/grpc/framework/alpha/_face_utilities.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/alpha/_reexport.py b/src/python/grpcio/grpc/framework/alpha/_reexport.py
index 4ea0e94d80..e027077a77 100644
--- a/src/python/grpcio/grpc/framework/alpha/_reexport.py
+++ b/src/python/grpcio/grpc/framework/alpha/_reexport.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/alpha/exceptions.py b/src/python/grpcio/grpc/framework/alpha/exceptions.py
index 8ec260488e..09359c5e94 100644
--- a/src/python/grpcio/grpc/framework/alpha/exceptions.py
+++ b/src/python/grpcio/grpc/framework/alpha/exceptions.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/alpha/interfaces.py b/src/python/grpcio/grpc/framework/alpha/interfaces.py
index cb6d58bb2e..48f144f614 100644
--- a/src/python/grpcio/grpc/framework/alpha/interfaces.py
+++ b/src/python/grpcio/grpc/framework/alpha/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/base/_ingestion.py b/src/python/grpcio/grpc/framework/base/_ingestion.py
index 090cb158c9..c9b10acb77 100644
--- a/src/python/grpcio/grpc/framework/base/_ingestion.py
+++ b/src/python/grpcio/grpc/framework/base/_ingestion.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/base/_interfaces.py b/src/python/grpcio/grpc/framework/base/_interfaces.py
index c0cc866cad..6bb9837c4a 100644
--- a/src/python/grpcio/grpc/framework/base/_interfaces.py
+++ b/src/python/grpcio/grpc/framework/base/_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/base/_reception.py b/src/python/grpcio/grpc/framework/base/_reception.py
index 2bee3947f0..a59c5165f9 100644
--- a/src/python/grpcio/grpc/framework/base/_reception.py
+++ b/src/python/grpcio/grpc/framework/base/_reception.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/base/_transmission.py b/src/python/grpcio/grpc/framework/base/_transmission.py
index 398faaf314..e2a25626f1 100644
--- a/src/python/grpcio/grpc/framework/base/_transmission.py
+++ b/src/python/grpcio/grpc/framework/base/_transmission.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/base/interfaces.py b/src/python/grpcio/grpc/framework/base/interfaces.py
index 7c58a23ce0..995b51cd5b 100644
--- a/src/python/grpcio/grpc/framework/base/interfaces.py
+++ b/src/python/grpcio/grpc/framework/base/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/core/_end.py b/src/python/grpcio/grpc/framework/core/_end.py
index dc2f48589a..009d27c915 100644
--- a/src/python/grpcio/grpc/framework/core/_end.py
+++ b/src/python/grpcio/grpc/framework/core/_end.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/core/_ingestion.py b/src/python/grpcio/grpc/framework/core/_ingestion.py
index 1e1fd73ce4..f2767c981b 100644
--- a/src/python/grpcio/grpc/framework/core/_ingestion.py
+++ b/src/python/grpcio/grpc/framework/core/_ingestion.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/core/_interfaces.py b/src/python/grpcio/grpc/framework/core/_interfaces.py
index 985e5e8550..63ac82f80e 100644
--- a/src/python/grpcio/grpc/framework/core/_interfaces.py
+++ b/src/python/grpcio/grpc/framework/core/_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/core/_termination.py b/src/python/grpcio/grpc/framework/core/_termination.py
index e8c4ec60a3..fff3a3fc14 100644
--- a/src/python/grpcio/grpc/framework/core/_termination.py
+++ b/src/python/grpcio/grpc/framework/core/_termination.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/crust/_control.py b/src/python/grpcio/grpc/framework/crust/_control.py
index c27fc9106d..9b4167bda0 100644
--- a/src/python/grpcio/grpc/framework/crust/_control.py
+++ b/src/python/grpcio/grpc/framework/crust/_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/crust/implementations.py b/src/python/grpcio/grpc/framework/crust/implementations.py
index d0ecafcaf6..2d3ab733b6 100644
--- a/src/python/grpcio/grpc/framework/crust/implementations.py
+++ b/src/python/grpcio/grpc/framework/crust/implementations.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/face/_control.py b/src/python/grpcio/grpc/framework/face/_control.py
index ec43203a25..539615efa1 100644
--- a/src/python/grpcio/grpc/framework/face/_control.py
+++ b/src/python/grpcio/grpc/framework/face/_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/face/exceptions.py b/src/python/grpcio/grpc/framework/face/exceptions.py
index c272ac75ab..f95455604d 100644
--- a/src/python/grpcio/grpc/framework/face/exceptions.py
+++ b/src/python/grpcio/grpc/framework/face/exceptions.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/face/implementations.py b/src/python/grpcio/grpc/framework/face/implementations.py
index 9c75a5faf4..96055b4130 100644
--- a/src/python/grpcio/grpc/framework/face/implementations.py
+++ b/src/python/grpcio/grpc/framework/face/implementations.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/face/interfaces.py b/src/python/grpcio/grpc/framework/face/interfaces.py
index 9fc18d73bc..e9a25c17e1 100644
--- a/src/python/grpcio/grpc/framework/face/interfaces.py
+++ b/src/python/grpcio/grpc/framework/face/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/activated.py b/src/python/grpcio/grpc/framework/foundation/activated.py
index 9b49b6363c..8b8e4f45b5 100644
--- a/src/python/grpcio/grpc/framework/foundation/activated.py
+++ b/src/python/grpcio/grpc/framework/foundation/activated.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/callable_util.py b/src/python/grpcio/grpc/framework/foundation/callable_util.py
index e0a4cab738..4f029f97bb 100644
--- a/src/python/grpcio/grpc/framework/foundation/callable_util.py
+++ b/src/python/grpcio/grpc/framework/foundation/callable_util.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/future.py b/src/python/grpcio/grpc/framework/foundation/future.py
index bb8ee3ad87..9210616150 100644
--- a/src/python/grpcio/grpc/framework/foundation/future.py
+++ b/src/python/grpcio/grpc/framework/foundation/future.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/logging_pool.py b/src/python/grpcio/grpc/framework/foundation/logging_pool.py
index f82c7f7fba..9b469a1452 100644
--- a/src/python/grpcio/grpc/framework/foundation/logging_pool.py
+++ b/src/python/grpcio/grpc/framework/foundation/logging_pool.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/relay.py b/src/python/grpcio/grpc/framework/foundation/relay.py
index ff4e2275ae..20f41b2738 100644
--- a/src/python/grpcio/grpc/framework/foundation/relay.py
+++ b/src/python/grpcio/grpc/framework/foundation/relay.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/stream.py b/src/python/grpcio/grpc/framework/foundation/stream.py
index 32a2e52aed..ddd6cc496a 100644
--- a/src/python/grpcio/grpc/framework/foundation/stream.py
+++ b/src/python/grpcio/grpc/framework/foundation/stream.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/foundation/stream_util.py b/src/python/grpcio/grpc/framework/foundation/stream_util.py
index 7d5977fbbd..a6f234f1fe 100644
--- a/src/python/grpcio/grpc/framework/foundation/stream_util.py
+++ b/src/python/grpcio/grpc/framework/foundation/stream_util.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/interfaces/base/base.py b/src/python/grpcio/grpc/framework/interfaces/base/base.py
index 69be37e7ab..a2ddd9c474 100644
--- a/src/python/grpcio/grpc/framework/interfaces/base/base.py
+++ b/src/python/grpcio/grpc/framework/interfaces/base/base.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/interfaces/face/face.py b/src/python/grpcio/grpc/framework/interfaces/face/face.py
index b994acecac..4826e7fff6 100644
--- a/src/python/grpcio/grpc/framework/interfaces/face/face.py
+++ b/src/python/grpcio/grpc/framework/interfaces/face/face.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc/framework/interfaces/links/links.py b/src/python/grpcio/grpc/framework/interfaces/links/links.py
index 808167935f..9631b19078 100644
--- a/src/python/grpcio/grpc/framework/interfaces/links/links.py
+++ b/src/python/grpcio/grpc/framework/interfaces/links/links.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index a5bc18af5e..875ff49d30 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -74,9 +74,46 @@ CORE_SOURCE_FILES = [
   'src/core/lib/support/tmpfile_posix.c',
   'src/core/lib/support/tmpfile_win32.c',
   'src/core/lib/support/wrap_memcpy.c',
-  'src/core/lib/census/grpc_context.c',
-  'src/core/lib/census/grpc_filter.c',
-  'src/core/lib/census/grpc_plugin.c',
+  'src/core/ext/census/context.c',
+  'src/core/ext/census/grpc_context.c',
+  'src/core/ext/census/grpc_filter.c',
+  'src/core/ext/census/grpc_plugin.c',
+  'src/core/ext/census/initialize.c',
+  'src/core/ext/census/mlog.c',
+  'src/core/ext/census/operation.c',
+  'src/core/ext/census/placeholders.c',
+  'src/core/ext/census/tracing.c',
+  'src/core/ext/lb_policy/grpclb/load_balancer_api.c',
+  'src/core/ext/lb_policy/grpclb/proto/grpc/lb/v0/load_balancer.pb.c',
+  'src/core/ext/lb_policy/pick_first/pick_first.c',
+  'src/core/ext/lb_policy/round_robin/round_robin.c',
+  'src/core/ext/resolver/dns/native/dns_resolver.c',
+  'src/core/ext/resolver/sockaddr/sockaddr_resolver.c',
+  'src/core/ext/transport/chttp2/client/insecure/channel_create.c',
+  'src/core/ext/transport/chttp2/client/secure/secure_channel_create.c',
+  'src/core/ext/transport/chttp2/server/insecure/server_chttp2.c',
+  'src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c',
+  'src/core/ext/transport/chttp2/transport/alpn.c',
+  'src/core/ext/transport/chttp2/transport/bin_encoder.c',
+  'src/core/ext/transport/chttp2/transport/chttp2_transport.c',
+  'src/core/ext/transport/chttp2/transport/frame_data.c',
+  'src/core/ext/transport/chttp2/transport/frame_goaway.c',
+  'src/core/ext/transport/chttp2/transport/frame_ping.c',
+  'src/core/ext/transport/chttp2/transport/frame_rst_stream.c',
+  'src/core/ext/transport/chttp2/transport/frame_settings.c',
+  'src/core/ext/transport/chttp2/transport/frame_window_update.c',
+  'src/core/ext/transport/chttp2/transport/hpack_encoder.c',
+  'src/core/ext/transport/chttp2/transport/hpack_parser.c',
+  'src/core/ext/transport/chttp2/transport/hpack_table.c',
+  'src/core/ext/transport/chttp2/transport/huffsyms.c',
+  'src/core/ext/transport/chttp2/transport/incoming_metadata.c',
+  'src/core/ext/transport/chttp2/transport/parsing.c',
+  'src/core/ext/transport/chttp2/transport/status_conversion.c',
+  'src/core/ext/transport/chttp2/transport/stream_lists.c',
+  'src/core/ext/transport/chttp2/transport/stream_map.c',
+  'src/core/ext/transport/chttp2/transport/timeout_encoding.c',
+  'src/core/ext/transport/chttp2/transport/varint.c',
+  'src/core/ext/transport/chttp2/transport/writing.c',
   'src/core/lib/channel/channel_args.c',
   'src/core/lib/channel/channel_stack.c',
   'src/core/lib/channel/channel_stack_builder.c',
@@ -90,17 +127,12 @@ CORE_SOURCE_FILES = [
   'src/core/lib/client_config/connector.c',
   'src/core/lib/client_config/default_initial_connect_string.c',
   'src/core/lib/client_config/initial_connect_string.c',
-  'src/core/lib/client_config/lb_policies/load_balancer_api.c',
-  'src/core/lib/client_config/lb_policies/pick_first.c',
-  'src/core/lib/client_config/lb_policies/round_robin.c',
   'src/core/lib/client_config/lb_policy.c',
   'src/core/lib/client_config/lb_policy_factory.c',
   'src/core/lib/client_config/lb_policy_registry.c',
   'src/core/lib/client_config/resolver.c',
   'src/core/lib/client_config/resolver_factory.c',
   'src/core/lib/client_config/resolver_registry.c',
-  'src/core/lib/client_config/resolvers/dns_resolver.c',
-  'src/core/lib/client_config/resolvers/sockaddr_resolver.c',
   'src/core/lib/client_config/subchannel.c',
   'src/core/lib/client_config/subchannel_factory.c',
   'src/core/lib/client_config/subchannel_index.c',
@@ -110,22 +142,20 @@ CORE_SOURCE_FILES = [
   'src/core/lib/debug/trace.c',
   'src/core/lib/http/format_request.c',
   'src/core/lib/http/httpcli.c',
+  'src/core/lib/http/httpcli_security_connector.c',
   'src/core/lib/http/parser.c',
   'src/core/lib/iomgr/closure.c',
   'src/core/lib/iomgr/endpoint.c',
   'src/core/lib/iomgr/endpoint_pair_posix.c',
   'src/core/lib/iomgr/endpoint_pair_windows.c',
+  'src/core/lib/iomgr/ev_poll_and_epoll_posix.c',
+  'src/core/lib/iomgr/ev_posix.c',
   'src/core/lib/iomgr/exec_ctx.c',
   'src/core/lib/iomgr/executor.c',
-  'src/core/lib/iomgr/fd_posix.c',
   'src/core/lib/iomgr/iocp_windows.c',
   'src/core/lib/iomgr/iomgr.c',
   'src/core/lib/iomgr/iomgr_posix.c',
   'src/core/lib/iomgr/iomgr_windows.c',
-  'src/core/lib/iomgr/pollset_multipoller_with_epoll.c',
-  'src/core/lib/iomgr/pollset_multipoller_with_poll_posix.c',
-  'src/core/lib/iomgr/pollset_posix.c',
-  'src/core/lib/iomgr/pollset_set_posix.c',
   'src/core/lib/iomgr/pollset_set_windows.c',
   'src/core/lib/iomgr/pollset_windows.c',
   'src/core/lib/iomgr/resolve_address_posix.c',
@@ -157,7 +187,20 @@ CORE_SOURCE_FILES = [
   'src/core/lib/json/json_reader.c',
   'src/core/lib/json/json_string.c',
   'src/core/lib/json/json_writer.c',
-  'src/core/lib/proto/grpc/lb/v0/load_balancer.pb.c',
+  'src/core/lib/security/b64.c',
+  'src/core/lib/security/client_auth_filter.c',
+  'src/core/lib/security/credentials.c',
+  'src/core/lib/security/credentials_metadata.c',
+  'src/core/lib/security/credentials_posix.c',
+  'src/core/lib/security/credentials_win32.c',
+  'src/core/lib/security/google_default_credentials.c',
+  'src/core/lib/security/handshake.c',
+  'src/core/lib/security/json_token.c',
+  'src/core/lib/security/jwt_verifier.c',
+  'src/core/lib/security/secure_endpoint.c',
+  'src/core/lib/security/security_connector.c',
+  'src/core/lib/security/security_context.c',
+  'src/core/lib/security/server_auth_filter.c',
   'src/core/lib/surface/alarm.c',
   'src/core/lib/surface/api_trace.c',
   'src/core/lib/surface/byte_buffer.c',
@@ -167,74 +210,29 @@ CORE_SOURCE_FILES = [
   'src/core/lib/surface/call_log_batch.c',
   'src/core/lib/surface/channel.c',
   'src/core/lib/surface/channel_connectivity.c',
-  'src/core/lib/surface/channel_create.c',
   'src/core/lib/surface/channel_init.c',
   'src/core/lib/surface/channel_ping.c',
   'src/core/lib/surface/channel_stack_type.c',
   'src/core/lib/surface/completion_queue.c',
   'src/core/lib/surface/event_string.c',
   'src/core/lib/surface/init.c',
+  'src/core/lib/surface/init_secure.c',
   'src/core/lib/surface/lame_client.c',
   'src/core/lib/surface/metadata_array.c',
   'src/core/lib/surface/server.c',
-  'src/core/lib/surface/server_chttp2.c',
   'src/core/lib/surface/validate_metadata.c',
   'src/core/lib/surface/version.c',
   'src/core/lib/transport/byte_stream.c',
-  'src/core/lib/transport/chttp2/alpn.c',
-  'src/core/lib/transport/chttp2/bin_encoder.c',
-  'src/core/lib/transport/chttp2/frame_data.c',
-  'src/core/lib/transport/chttp2/frame_goaway.c',
-  'src/core/lib/transport/chttp2/frame_ping.c',
-  'src/core/lib/transport/chttp2/frame_rst_stream.c',
-  'src/core/lib/transport/chttp2/frame_settings.c',
-  'src/core/lib/transport/chttp2/frame_window_update.c',
-  'src/core/lib/transport/chttp2/hpack_encoder.c',
-  'src/core/lib/transport/chttp2/hpack_parser.c',
-  'src/core/lib/transport/chttp2/hpack_table.c',
-  'src/core/lib/transport/chttp2/huffsyms.c',
-  'src/core/lib/transport/chttp2/incoming_metadata.c',
-  'src/core/lib/transport/chttp2/parsing.c',
-  'src/core/lib/transport/chttp2/status_conversion.c',
-  'src/core/lib/transport/chttp2/stream_lists.c',
-  'src/core/lib/transport/chttp2/stream_map.c',
-  'src/core/lib/transport/chttp2/timeout_encoding.c',
-  'src/core/lib/transport/chttp2/varint.c',
-  'src/core/lib/transport/chttp2/writing.c',
-  'src/core/lib/transport/chttp2_transport.c',
   'src/core/lib/transport/connectivity_state.c',
   'src/core/lib/transport/metadata.c',
   'src/core/lib/transport/metadata_batch.c',
   'src/core/lib/transport/static_metadata.c',
   'src/core/lib/transport/transport.c',
   'src/core/lib/transport/transport_op_string.c',
-  'src/core/lib/http/httpcli_security_connector.c',
-  'src/core/lib/security/b64.c',
-  'src/core/lib/security/client_auth_filter.c',
-  'src/core/lib/security/credentials.c',
-  'src/core/lib/security/credentials_metadata.c',
-  'src/core/lib/security/credentials_posix.c',
-  'src/core/lib/security/credentials_win32.c',
-  'src/core/lib/security/google_default_credentials.c',
-  'src/core/lib/security/handshake.c',
-  'src/core/lib/security/json_token.c',
-  'src/core/lib/security/jwt_verifier.c',
-  'src/core/lib/security/secure_endpoint.c',
-  'src/core/lib/security/security_connector.c',
-  'src/core/lib/security/security_context.c',
-  'src/core/lib/security/server_auth_filter.c',
-  'src/core/lib/security/server_secure_chttp2.c',
-  'src/core/lib/surface/init_secure.c',
-  'src/core/lib/surface/secure_channel_create.c',
   'src/core/lib/tsi/fake_transport_security.c',
   'src/core/lib/tsi/ssl_transport_security.c',
   'src/core/lib/tsi/transport_security.c',
-  'src/core/lib/census/context.c',
-  'src/core/lib/census/initialize.c',
-  'src/core/lib/census/mlog.c',
-  'src/core/lib/census/operation.c',
-  'src/core/lib/census/placeholders.c',
-  'src/core/lib/census/tracing.c',
+  'src/core/plugin_registry/grpc_plugin_registry.c',
   'third_party/nanopb/pb_common.c',
   'third_party/nanopb/pb_decode.c',
   'third_party/nanopb/pb_encode.c',
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index 75b88cfd61..873b4e2a91 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/precompiled.py b/src/python/grpcio/precompiled.py
index d34250b02c..b6aa7fc90e 100644
--- a/src/python/grpcio/precompiled.py
+++ b/src/python/grpcio/precompiled.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -91,6 +91,9 @@ class BuildTaggedExt(setuptools.Command):
 
 
 def update_setup_arguments(setup_arguments):
+  if not USE_PRECOMPILED_BINARIES:
+    sys.stderr.write('not using precompiled extension')
+    return
   url = '{}/{}.so'.format(BINARIES_REPOSITORY, _tagged_ext_name('cygrpc'))
   target_path = os.path.join(PYTHON_STEM, 'grpc/_cython/cygrpc.so')
   try:
diff --git a/src/python/grpcio/tests/__init__.py b/src/python/grpcio/tests/__init__.py
index c3b80d766d..a70a1b1f1d 100644
--- a/src/python/grpcio/tests/__init__.py
+++ b/src/python/grpcio/tests/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/_loader.py b/src/python/grpcio/tests/_loader.py
index 2f9e5c660e..c2f097f6c6 100644
--- a/src/python/grpcio/tests/_loader.py
+++ b/src/python/grpcio/tests/_loader.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/_result.py b/src/python/grpcio/tests/_result.py
index 18b0f43963..1acec6a9b5 100644
--- a/src/python/grpcio/tests/_result.py
+++ b/src/python/grpcio/tests/_result.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/_runner.py b/src/python/grpcio/tests/_runner.py
index 173a170409..f0718573e2 100644
--- a/src/python/grpcio/tests/_runner.py
+++ b/src/python/grpcio/tests/_runner.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/interop/_secure_interop_test.py b/src/python/grpcio/tests/interop/_secure_interop_test.py
index 7e3061133f..1a1a063a6f 100644
--- a/src/python/grpcio/tests/interop/_secure_interop_test.py
+++ b/src/python/grpcio/tests/interop/_secure_interop_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -56,7 +56,7 @@ class SecureInteropTest(
     self.stub = test_pb2.beta_create_TestService_stub(
         test_utilities.not_really_secure_channel(
             '[::]', port, implementations.ssl_channel_credentials(
-                resources.test_root_certificates(), None, None),
+                resources.test_root_certificates()),
                 _SERVER_HOST_OVERRIDE))
 
   def tearDown(self):
diff --git a/src/python/grpcio/tests/interop/client.py b/src/python/grpcio/tests/interop/client.py
index 573ec2bd71..02a37cc6bc 100644
--- a/src/python/grpcio/tests/interop/client.py
+++ b/src/python/grpcio/tests/interop/client.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -94,7 +94,7 @@ def _stub(args):
 
     channel = test_utilities.not_really_secure_channel(
         args.server_host, args.server_port,
-        implementations.ssl_channel_credentials(root_certificates, None, None),
+        implementations.ssl_channel_credentials(root_certificates),
         args.server_host_override)
     stub = test_pb2.beta_create_TestService_stub(
         channel, metadata_transformer=metadata_transformer)
diff --git a/src/python/grpcio/tests/interop/methods.py b/src/python/grpcio/tests/interop/methods.py
index 7f42b4a005..03810338ed 100644
--- a/src/python/grpcio/tests/interop/methods.py
+++ b/src/python/grpcio/tests/interop/methods.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/protoc_plugin/beta_python_plugin_test.py b/src/python/grpcio/tests/protoc_plugin/beta_python_plugin_test.py
index 230ec6487d..6fba3d4271 100644
--- a/src/python/grpcio/tests/protoc_plugin/beta_python_plugin_test.py
+++ b/src/python/grpcio/tests/protoc_plugin/beta_python_plugin_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/_adapter/_intermediary_low_test.py b/src/python/grpcio/tests/unit/_adapter/_intermediary_low_test.py
index 06bfc34977..22d4b019c7 100644
--- a/src/python/grpcio/tests/unit/_adapter/_intermediary_low_test.py
+++ b/src/python/grpcio/tests/unit/_adapter/_intermediary_low_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py b/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
index c9f36636b5..7a90eacf77 100644
--- a/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
+++ b/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py b/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
index 881633754c..2b8981c752 100644
--- a/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
+++ b/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py b/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
index 3be3b051fb..50b9a5a824 100644
--- a/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/_links/_proto_scenarios.py b/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
index acd4891390..50661085f9 100644
--- a/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
+++ b/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/beta/_beta_features_test.py b/src/python/grpcio/tests/unit/beta/_beta_features_test.py
index ebdedcc11e..b8b77a96c1 100644
--- a/src/python/grpcio/tests/unit/beta/_beta_features_test.py
+++ b/src/python/grpcio/tests/unit/beta/_beta_features_test.py
@@ -183,7 +183,7 @@ class BetaFeaturesTest(unittest.TestCase):
     port = self._server.add_secure_port('[::]:0', server_credentials)
     self._server.start()
     self._channel_credentials = implementations.ssl_channel_credentials(
-        resources.test_root_certificates(), None, None)
+        resources.test_root_certificates())
     self._call_credentials = implementations.metadata_call_credentials(
         _metadata_plugin)
     channel = test_utilities.not_really_secure_channel(
@@ -296,7 +296,7 @@ class ContextManagementAndLifecycleTest(unittest.TestCase):
     self._server_credentials = implementations.ssl_server_credentials(
         [(resources.private_key(), resources.certificate_chain(),),])
     self._channel_credentials = implementations.ssl_channel_credentials(
-        resources.test_root_certificates(), None, None)
+        resources.test_root_certificates())
     self._stub_options = implementations.stub_options(
         thread_pool_size=test_constants.POOL_SIZE)
 
diff --git a/src/python/grpcio/tests/unit/beta/_face_interface_test.py b/src/python/grpcio/tests/unit/beta/_face_interface_test.py
index cb302bbf68..ea19ee47ae 100644
--- a/src/python/grpcio/tests/unit/beta/_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/beta/_face_interface_test.py
@@ -94,7 +94,7 @@ class _Implementation(test_interfaces.Implementation):
     port = server.add_secure_port('[::]:0', server_credentials)
     server.start()
     channel_credentials = implementations.ssl_channel_credentials(
-        resources.test_root_certificates(), None, None)
+        resources.test_root_certificates())
     channel = test_utilities.not_really_secure_channel(
         'localhost', port, channel_credentials, _SERVER_HOST_OVERRIDE)
     stub_options = implementations.stub_options(
diff --git a/src/python/grpcio/tests/unit/beta/_implementations_test.py b/src/python/grpcio/tests/unit/beta/_implementations_test.py
index 6b32305af7..26be670c45 100644
--- a/src/python/grpcio/tests/unit/beta/_implementations_test.py
+++ b/src/python/grpcio/tests/unit/beta/_implementations_test.py
@@ -38,14 +38,13 @@ from tests.unit import resources
 class ChannelCredentialsTest(unittest.TestCase):
 
   def test_runtime_provided_root_certificates(self):
-    channel_credentials = implementations.ssl_channel_credentials(
-        None, None, None)
+    channel_credentials = implementations.ssl_channel_credentials()
     self.assertIsInstance(
         channel_credentials, implementations.ChannelCredentials)
   
   def test_application_provided_root_certificates(self):
     channel_credentials = implementations.ssl_channel_credentials(
-        resources.test_root_certificates(), None, None)
+        resources.test_root_certificates())
     self.assertIsInstance(
         channel_credentials, implementations.ChannelCredentials)
 
diff --git a/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py b/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
index fd2d4298f9..43457be362 100644
--- a/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/common/test_constants.py b/src/python/grpcio/tests/unit/framework/common/test_constants.py
index 9f1fb8471c..8d89101e09 100644
--- a/src/python/grpcio/tests/unit/framework/common/test_constants.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_constants.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/common/test_control.py b/src/python/grpcio/tests/unit/framework/common/test_control.py
index 0387668b11..ca5ba3a854 100644
--- a/src/python/grpcio/tests/unit/framework/common/test_control.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/common/test_coverage.py b/src/python/grpcio/tests/unit/framework/common/test_coverage.py
index 184621fb5c..ea2d2812ce 100644
--- a/src/python/grpcio/tests/unit/framework/common/test_coverage.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_coverage.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/base_util.py b/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
index 60ab5bc0fe..59652b3e90 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
index b0b00bfa81..2ebe1a32a4 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/control.py b/src/python/grpcio/tests/unit/framework/face/testing/control.py
index 0d40331e19..8425affcc9 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/control.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/control.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/coverage.py b/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
index 9f5381069d..3c88b7841a 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/digest.py b/src/python/grpcio/tests/unit/framework/face/testing/digest.py
index 100067cc83..2b45aded20 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/digest.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/digest.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
index db901cfe4e..98b61e492c 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
index d8706aa39e..cae791af97 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py b/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
index 87be836e2d..8a25f89c88 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/service.py b/src/python/grpcio/tests/unit/framework/face/testing/service.py
index dc0f204c04..3e4228cc07 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/service.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/service.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
index 5be9330a77..f29d400844 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py b/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
index 0521e1c102..330e445d43 100644
--- a/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
+++ b/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py b/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
index 94bcc1428e..0eb38abf22 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py b/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
index 0594cfeb31..5eba475ba8 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
index 936b87f597..649892463a 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
index 40c03f9e71..f0befb0b27 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
index 401b52f614..c3813d5f3a 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
index ff38dc2ece..ac487bed4f 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
index 42a7f4e3b8..48f31fc677 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
index bec8d5113c..f13dff0558 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py b/src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py
index 06b9d77e52..71de9d835e 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py b/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
index a5e28b7942..40f38e68ba 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py b/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
index 2283e79f0a..608e64119e 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio/tests/unit/test_common.py b/src/python/grpcio/tests/unit/test_common.py
index 824f1cbd16..7b4d20dccb 100644
--- a/src/python/grpcio/tests/unit/test_common.py
+++ b/src/python/grpcio/tests/unit/test_common.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio_health_checking/grpc/health/v1/__init__.py b/src/python/grpcio_health_checking/grpc/health/v1/__init__.py
index 13aac79160..7086519106 100644
--- a/src/python/grpcio_health_checking/grpc/health/v1/__init__.py
+++ b/src/python/grpcio_health_checking/grpc/health/v1/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio_health_checking/grpc/health/v1/health.proto b/src/python/grpcio_health_checking/grpc/health/v1/health.proto
index de10719b6c..b0bac54be9 100644
--- a/src/python/grpcio_health_checking/grpc/health/v1/health.proto
+++ b/src/python/grpcio_health_checking/grpc/health/v1/health.proto
@@ -1,4 +1,4 @@
-// Copyright 2015-2016, Google Inc.
+// Copyright 2015, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
diff --git a/src/python/grpcio_health_checking/grpc/health/v1/health.py b/src/python/grpcio_health_checking/grpc/health/v1/health.py
index 60cbd64433..4b5af15aa6 100644
--- a/src/python/grpcio_health_checking/grpc/health/v1/health.py
+++ b/src/python/grpcio_health_checking/grpc/health/v1/health.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 6b7001a489..82b6d313c8 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_byte_buffer.c b/src/ruby/ext/grpc/rb_byte_buffer.c
index db7cac363a..cba910d832 100644
--- a/src/ruby/ext/grpc/rb_byte_buffer.c
+++ b/src/ruby/ext/grpc/rb_byte_buffer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -50,21 +50,18 @@ grpc_byte_buffer* grpc_rb_s_to_byte_buffer(char *string, size_t length) {
 }
 
 VALUE grpc_rb_byte_buffer_to_s(grpc_byte_buffer *buffer) {
-  size_t length = 0;
-  char *string = NULL;
-  size_t offset = 0;
+  VALUE rb_string;
   grpc_byte_buffer_reader reader;
   gpr_slice next;
   if (buffer == NULL) {
     return Qnil;
-
   }
-  length = grpc_byte_buffer_length(buffer);
-  string = xmalloc(length + 1);
+  rb_string = rb_str_buf_new(grpc_byte_buffer_length(buffer));
   grpc_byte_buffer_reader_init(&reader, buffer);
   while (grpc_byte_buffer_reader_next(&reader, &next) != 0) {
-    memcpy(string + offset, GPR_SLICE_START_PTR(next), GPR_SLICE_LENGTH(next));
-    offset += GPR_SLICE_LENGTH(next);
+    rb_str_cat(rb_string, (const char *) GPR_SLICE_START_PTR(next),
+               GPR_SLICE_LENGTH(next));
+    gpr_slice_unref(next);
   }
-  return rb_str_new(string, length);
+  return rb_string;
 }
diff --git a/src/ruby/ext/grpc/rb_call.c b/src/ruby/ext/grpc/rb_call.c
index cd0aa6aaf2..dc80d18b45 100644
--- a/src/ruby/ext/grpc/rb_call.c
+++ b/src/ruby/ext/grpc/rb_call.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -551,13 +551,26 @@ static void grpc_run_batch_stack_init(run_batch_stack *st,
 /* grpc_run_batch_stack_cleanup ensures the run_batch_stack is properly
  * cleaned up */
 static void grpc_run_batch_stack_cleanup(run_batch_stack *st) {
+  size_t i = 0;
+
   grpc_metadata_array_destroy(&st->send_metadata);
   grpc_metadata_array_destroy(&st->send_trailing_metadata);
   grpc_metadata_array_destroy(&st->recv_metadata);
   grpc_metadata_array_destroy(&st->recv_trailing_metadata);
+
   if (st->recv_status_details != NULL) {
     gpr_free(st->recv_status_details);
   }
+
+  if (st->recv_message != NULL) {
+    grpc_byte_buffer_destroy(st->recv_message);
+  }
+
+  for (i = 0; i < st->op_num; i++) {
+    if (st->ops[i].op == GRPC_OP_SEND_MESSAGE) {
+      grpc_byte_buffer_destroy(st->ops[i].data.send_message);
+    }
+  }
 }
 
 /* grpc_run_batch_stack_fill_ops fills the run_batch_stack ops array from
@@ -643,7 +656,6 @@ static VALUE grpc_run_batch_stack_build_result(run_batch_stack *st) {
         break;
       case GRPC_OP_SEND_MESSAGE:
         rb_struct_aset(result, sym_send_message, Qtrue);
-        grpc_byte_buffer_destroy(st->ops[i].data.send_message);
         break;
       case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
         rb_struct_aset(result, sym_send_close, Qtrue);
diff --git a/src/ruby/ext/grpc/rb_call_credentials.c b/src/ruby/ext/grpc/rb_call_credentials.c
index 2b978fcdd0..38bf1f7710 100644
--- a/src/ruby/ext/grpc/rb_call_credentials.c
+++ b/src/ruby/ext/grpc/rb_call_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index e1aaa539db..984afad107 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_channel_args.c b/src/ruby/ext/grpc/rb_channel_args.c
index 69827cea1c..2ffb8f41da 100644
--- a/src/ruby/ext/grpc/rb_channel_args.c
+++ b/src/ruby/ext/grpc/rb_channel_args.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_channel_credentials.c b/src/ruby/ext/grpc/rb_channel_credentials.c
index f649084311..10391bc963 100644
--- a/src/ruby/ext/grpc/rb_channel_credentials.c
+++ b/src/ruby/ext/grpc/rb_channel_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_completion_queue.c b/src/ruby/ext/grpc/rb_completion_queue.c
index 1eb5a28750..2a2eee190c 100644
--- a/src/ruby/ext/grpc/rb_completion_queue.c
+++ b/src/ruby/ext/grpc/rb_completion_queue.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_grpc.c b/src/ruby/ext/grpc/rb_grpc.c
index 0f9b18fa21..acb47b0055 100644
--- a/src/ruby/ext/grpc/rb_grpc.c
+++ b/src/ruby/ext/grpc/rb_grpc.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 3bf81af8fb..22ea84c750 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -283,7 +283,7 @@ extern grpc_call_destroy_type grpc_call_destroy_import;
 typedef grpc_call_error(*grpc_server_request_call_type)(grpc_server *server, grpc_call **call, grpc_call_details *details, grpc_metadata_array *request_metadata, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
 extern grpc_server_request_call_type grpc_server_request_call_import;
 #define grpc_server_request_call grpc_server_request_call_import
-typedef void *(*grpc_server_register_method_type)(grpc_server *server, const char *method, const char *host);
+typedef void *(*grpc_server_register_method_type)(grpc_server *server, const char *method, const char *host, uint32_t flags);
 extern grpc_server_register_method_type grpc_server_register_method_import;
 #define grpc_server_register_method grpc_server_register_method_import
 typedef grpc_call_error(*grpc_server_request_registered_call_type)(grpc_server *server, void *registered_method, grpc_call **call, gpr_timespec *deadline, grpc_metadata_array *request_metadata, grpc_byte_buffer **optional_payload, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
diff --git a/src/ruby/ext/grpc/rb_server.c b/src/ruby/ext/grpc/rb_server.c
index 37cc55a651..96e60c6776 100644
--- a/src/ruby/ext/grpc/rb_server.c
+++ b/src/ruby/ext/grpc/rb_server.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/ext/grpc/rb_server_credentials.c b/src/ruby/ext/grpc/rb_server_credentials.c
index 4ea59b6b27..33b8372850 100644
--- a/src/ruby/ext/grpc/rb_server_credentials.c
+++ b/src/ruby/ext/grpc/rb_server_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015-2016, Google Inc.
+ * Copyright 2015, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 1671ba3550..4e23cd7af2 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/core/time_consts.rb b/src/ruby/lib/grpc/core/time_consts.rb
index c8eae7806b..3b8c2daa07 100644
--- a/src/ruby/lib/grpc/core/time_consts.rb
+++ b/src/ruby/lib/grpc/core/time_consts.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/errors.rb b/src/ruby/lib/grpc/errors.rb
index 2227ee1f12..1d7588c18d 100644
--- a/src/ruby/lib/grpc/errors.rb
+++ b/src/ruby/lib/grpc/errors.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index 213176bd48..6b9b785693 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index 4da9ff086a..98e83a8396 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/generic/rpc_desc.rb b/src/ruby/lib/grpc/generic/rpc_desc.rb
index 526b2ba5b6..dd90d8d91d 100644
--- a/src/ruby/lib/grpc/generic/rpc_desc.rb
+++ b/src/ruby/lib/grpc/generic/rpc_desc.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index b30d19dd2b..4b5578b018 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/grpc.rb b/src/ruby/lib/grpc/grpc.rb
index d8a4947494..250f6dd30d 100644
--- a/src/ruby/lib/grpc/grpc.rb
+++ b/src/ruby/lib/grpc/grpc.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index ef0876159d..67c6a5d5a1 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/pb/generate_proto_ruby.sh b/src/ruby/pb/generate_proto_ruby.sh
index 86c082099d..82dad18ad0 100755
--- a/src/ruby/pb/generate_proto_ruby.sh
+++ b/src/ruby/pb/generate_proto_ruby.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -40,11 +40,18 @@ $PROTOC -I src/proto src/proto/grpc/health/v1/health.proto \
     --ruby_out=src/ruby/pb \
     --plugin=$PLUGIN
 
-$PROTOC -I . test/proto/{messages,test,empty}.proto \
+$PROTOC -I . \
+    src/proto/grpc/testing/{messages,test,empty}.proto \
     --grpc_out=src/ruby/pb \
     --ruby_out=src/ruby/pb \
     --plugin=$PLUGIN
 
+$PROTOC -I . \
+    src/proto/grpc/testing/{messages,payloads,stats,services,control}.proto \
+    --grpc_out=src/ruby/qps \
+    --ruby_out=src/ruby/qps \
+    --plugin=$PLUGIN
+
 $PROTOC -I src/proto/math src/proto/math/math.proto \
     --grpc_out=src/ruby/bin \
     --ruby_out=src/ruby/bin \
diff --git a/src/ruby/pb/grpc/health/checker.rb b/src/ruby/pb/grpc/health/checker.rb
index 9f1ee65c41..f7310d9289 100644
--- a/src/ruby/pb/grpc/health/checker.rb
+++ b/src/ruby/pb/grpc/health/checker.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/pb/test/client.rb b/src/ruby/pb/test/client.rb
index 684ee80771..2f83e67c52 100755
--- a/src/ruby/pb/test/client.rb
+++ b/src/ruby/pb/test/client.rb
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/qps/client.rb b/src/ruby/qps/client.rb
new file mode 100644
index 0000000000..d04f707479
--- /dev/null
+++ b/src/ruby/qps/client.rb
@@ -0,0 +1,164 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Worker and worker service implementation
+
+this_dir = File.expand_path(File.dirname(__FILE__))
+lib_dir = File.join(File.dirname(this_dir), 'lib')
+$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)
+$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)
+
+require 'grpc'
+require 'histogram'
+require 'src/proto/grpc/testing/services_services'
+
+class Poisson
+  def interarrival
+    @lambda_recip * (-Math.log(1.0-rand))
+  end
+  def advance
+    t = @next_time
+    @next_time += interarrival
+    t
+  end
+  def initialize(lambda)
+    @lambda_recip = 1.0/lambda
+    @next_time = Time.now + interarrival
+  end
+end
+
+class BenchmarkClient
+  def initialize(config)
+    opts = {}
+    if config.security_params
+      if config.security_params.use_test_ca
+        certs = load_test_certs
+        cred = GRPC::Core::ChannelCredentials.new(certs[0])
+      else
+        cred = GRPC::Core::ChannelCredentials.new()
+      end
+      if config.security_params.server_host_override
+        opts[GRPC::Core::Channel::SSL_TARGET] =
+          config.security_params.server_host_override
+      end
+    else
+      cred = :this_channel_is_insecure
+    end
+    @histres = config.histogram_params.resolution
+    @histmax = config.histogram_params.max_possible
+    @start_time = Time.now
+    @histogram = Histogram.new(@histres, @histmax)
+    @done = false
+
+    gtsr = Grpc::Testing::SimpleRequest
+    gtpt = Grpc::Testing::PayloadType
+    gtp = Grpc::Testing::Payload
+    simple_params = config.payload_config.simple_params
+    req = gtsr.new(response_type: gtpt::COMPRESSABLE,
+                   response_size: simple_params.resp_size,
+                   payload: gtp.new(type: gtpt::COMPRESSABLE,
+                                    body: nulls(simple_params.req_size)))
+
+    (0..config.client_channels-1).each do |chan|
+      gtbss = Grpc::Testing::BenchmarkService::Stub
+      st = config.server_targets
+      stub = gtbss.new(st[chan % st.length], cred, **opts)
+      (0..config.outstanding_rpcs_per_channel-1).each do |r|
+        Thread.new {
+          case config.load_params.load.to_s
+          when 'closed_loop'
+            waiter = nil
+          when 'poisson'
+            waiter = Poisson.new(config.load_params.poisson.offered_load /
+                                 (config.client_channels *
+                                  config.outstanding_rpcs_per_channel))
+          end
+          case config.rpc_type
+          when :UNARY
+            unary_ping_ponger(req,stub,config,waiter)
+          when :STREAMING
+            streaming_ping_ponger(req,stub,config,waiter)
+          end
+        }
+      end
+    end
+  end
+  def wait_to_issue(waiter)
+    if waiter
+      delay = waiter.advance-Time.now
+      sleep delay if delay > 0
+    end
+  end
+  def unary_ping_ponger(req, stub, config,waiter)
+    while !@done
+      wait_to_issue(waiter)
+      start = Time.now
+      resp = stub.unary_call(req)
+      @histogram.add((Time.now-start)*1e9)
+    end
+  end
+  def streaming_ping_ponger(req, stub, config, waiter)
+    q = EnumeratorQueue.new(self)
+    resp = stub.streaming_call(q.each_item)
+    start = Time.now
+    q.push(req)
+    resp.each do |r|
+      @histogram.add((Time.now-start)*1e9)
+      if !@done
+        wait_to_issue(waiter)
+        start = Time.now
+        q.push(req)
+      else
+        q.push(self)
+        break
+      end
+    end
+  end
+  def mark(reset)
+    lat = Grpc::Testing::HistogramData.new(
+      bucket: @histogram.contents,
+      min_seen: @histogram.minimum,
+      max_seen: @histogram.maximum,
+      sum: @histogram.sum,
+      sum_of_squares: @histogram.sum_of_squares,
+      count: @histogram.count
+    )
+    elapsed = Time.now-@start_time
+    if reset
+      @start_time = Time.now
+      @histogram = Histogram.new(@histres, @histmax)
+    end
+    Grpc::Testing::ClientStats.new(latencies: lat, time_elapsed: elapsed)
+  end
+  def shutdown
+    @done = true
+  end
+end
diff --git a/src/ruby/qps/histogram.rb b/src/ruby/qps/histogram.rb
new file mode 100644
index 0000000000..bf7a89ac46
--- /dev/null
+++ b/src/ruby/qps/histogram.rb
@@ -0,0 +1,88 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Histogram class for use in performance testing and measurement
+
+class Histogram
+  # Determine the bucket index for a given value
+  # @param {number} value The value to check
+  # @return {number} The bucket index
+  def bucket_for(value)
+    (Math.log(value)/Math.log(@multiplier)).to_i
+  end
+  # Initialize an empty histogram
+  # @param {number} resolution The resolution of the histogram
+  # @param {number} max_possible The maximum value for the histogram
+  def initialize(resolution, max_possible)
+    @resolution=resolution
+    @max_possible=max_possible
+    @sum=0
+    @sum_of_squares=0
+    @multiplier=1+resolution
+    @count=0
+    @min_seen=max_possible
+    @max_seen=0
+    @buckets=Array.new(bucket_for(max_possible)+1, 0)
+  end
+  # Add a value to the histogram. This updates all statistics with the new
+  # value. Those statistics should not be modified except with this function
+  # @param {number} value The value to add
+  def add(value)
+    @sum += value
+    @sum_of_squares += value * value
+    @count += 1
+    if value < @min_seen
+      @min_seen = value
+    end
+    if value > @max_seen
+      @max_seen = value
+    end
+    @buckets[bucket_for(value)] += 1
+  end
+  def minimum
+    @min_seen
+  end
+  def maximum
+    @max_seen
+  end
+  def sum
+    @sum
+  end
+  def sum_of_squares
+    @sum_of_squares
+  end
+  def count
+    @count
+  end
+  def contents
+    @buckets
+  end
+end
diff --git a/src/ruby/qps/qps-common.rb b/src/ruby/qps/qps-common.rb
new file mode 100644
index 0000000000..4119d600b1
--- /dev/null
+++ b/src/ruby/qps/qps-common.rb
@@ -0,0 +1,76 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Worker and worker service implementation
+
+this_dir = File.expand_path(File.dirname(__FILE__))
+lib_dir = File.join(File.dirname(this_dir), 'lib')
+$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)
+$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)
+
+require 'grpc'
+
+# produces a string of null chars (\0 aka pack 'x') of length l.
+def nulls(l)
+  fail 'requires #{l} to be +ve' if l < 0
+  [].pack('x' * l).force_encoding('ascii-8bit')
+end
+
+# load the test-only certificates
+def load_test_certs
+  this_dir = File.expand_path(File.dirname(__FILE__))
+  data_dir = File.join(File.dirname(this_dir), 'spec/testdata')
+  files = ['ca.pem', 'server1.key', 'server1.pem']
+  files.map { |f| File.open(File.join(data_dir, f)).read }
+end
+
+# A EnumeratorQueue wraps a Queue yielding the items added to it via each_item.
+class EnumeratorQueue
+  extend Forwardable
+  def_delegators :@q, :push
+
+  def initialize(sentinel)
+    @q = Queue.new
+    @sentinel = sentinel
+  end
+
+  def each_item
+    return enum_for(:each_item) unless block_given?
+    loop do
+      r = @q.pop
+      break if r.equal?(@sentinel)
+      fail r if r.is_a? Exception
+      yield r
+    end
+  end
+end
+
+
diff --git a/src/ruby/qps/server.rb b/src/ruby/qps/server.rb
new file mode 100644
index 0000000000..26f46a3140
--- /dev/null
+++ b/src/ruby/qps/server.rb
@@ -0,0 +1,91 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Worker and worker service implementation
+
+this_dir = File.expand_path(File.dirname(__FILE__))
+lib_dir = File.join(File.dirname(this_dir), 'lib')
+$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)
+$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)
+
+require 'grpc'
+require 'qps-common'
+require 'src/proto/grpc/testing/messages'
+require 'src/proto/grpc/testing/services_services'
+require 'src/proto/grpc/testing/stats'
+
+class BenchmarkServiceImpl < Grpc::Testing::BenchmarkService::Service
+  def unary_call(req, _call)
+    sr = Grpc::Testing::SimpleResponse
+    pl = Grpc::Testing::Payload
+    sr.new(payload: pl.new(body: nulls(req.response_size)))
+  end
+  def streaming_call(reqs)
+    q = EnumeratorQueue.new(self)
+    Thread.new {
+      sr = Grpc::Testing::SimpleResponse
+      pl = Grpc::Testing::Payload
+      reqs.each do |req|
+        q.push(sr.new(payload: pl.new(body: nulls(req.response_size))))
+      end
+      q.push(self)
+    }
+    q.each_item
+  end
+end
+
+class BenchmarkServer
+  def initialize(config, port)
+    if config.security_params
+      certs = load_test_certs
+      cred = GRPC::Core::ServerCredentials.new(
+        nil, [{private_key: certs[1], cert_chain: certs[2]}], false)
+    else
+      cred = :this_port_is_insecure
+    end
+    @server = GRPC::RpcServer.new
+    @port = @server.add_http2_port("0.0.0.0:" + port.to_s, cred)
+    @server.handle(BenchmarkServiceImpl.new)
+    @start_time = Time.now
+    Thread.new {
+      @server.run
+    }
+  end
+  def mark(reset)
+    s = Grpc::Testing::ServerStats.new(time_elapsed:
+                                         (Time.now-@start_time).to_f)
+    @start_time = Time.now if reset
+    s
+  end
+  def get_port
+    @port
+  end
+end
diff --git a/src/ruby/qps/src/proto/grpc/testing/control.rb b/src/ruby/qps/src/proto/grpc/testing/control.rb
new file mode 100644
index 0000000000..d007123f26
--- /dev/null
+++ b/src/ruby/qps/src/proto/grpc/testing/control.rb
@@ -0,0 +1,129 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: src/proto/grpc/testing/control.proto
+
+require 'google/protobuf'
+
+require 'src/proto/grpc/testing/payloads'
+require 'src/proto/grpc/testing/stats'
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "grpc.testing.PoissonParams" do
+    optional :offered_load, :double, 1
+  end
+  add_message "grpc.testing.UniformParams" do
+    optional :interarrival_lo, :double, 1
+    optional :interarrival_hi, :double, 2
+  end
+  add_message "grpc.testing.DeterministicParams" do
+    optional :offered_load, :double, 1
+  end
+  add_message "grpc.testing.ParetoParams" do
+    optional :interarrival_base, :double, 1
+    optional :alpha, :double, 2
+  end
+  add_message "grpc.testing.ClosedLoopParams" do
+  end
+  add_message "grpc.testing.LoadParams" do
+    oneof :load do
+      optional :closed_loop, :message, 1, "grpc.testing.ClosedLoopParams"
+      optional :poisson, :message, 2, "grpc.testing.PoissonParams"
+      optional :uniform, :message, 3, "grpc.testing.UniformParams"
+      optional :determ, :message, 4, "grpc.testing.DeterministicParams"
+      optional :pareto, :message, 5, "grpc.testing.ParetoParams"
+    end
+  end
+  add_message "grpc.testing.SecurityParams" do
+    optional :use_test_ca, :bool, 1
+    optional :server_host_override, :string, 2
+  end
+  add_message "grpc.testing.ClientConfig" do
+    repeated :server_targets, :string, 1
+    optional :client_type, :enum, 2, "grpc.testing.ClientType"
+    optional :security_params, :message, 3, "grpc.testing.SecurityParams"
+    optional :outstanding_rpcs_per_channel, :int32, 4
+    optional :client_channels, :int32, 5
+    optional :async_client_threads, :int32, 7
+    optional :rpc_type, :enum, 8, "grpc.testing.RpcType"
+    optional :load_params, :message, 10, "grpc.testing.LoadParams"
+    optional :payload_config, :message, 11, "grpc.testing.PayloadConfig"
+    optional :histogram_params, :message, 12, "grpc.testing.HistogramParams"
+    repeated :core_list, :int32, 13
+    optional :core_limit, :int32, 14
+  end
+  add_message "grpc.testing.ClientStatus" do
+    optional :stats, :message, 1, "grpc.testing.ClientStats"
+  end
+  add_message "grpc.testing.Mark" do
+    optional :reset, :bool, 1
+  end
+  add_message "grpc.testing.ClientArgs" do
+    oneof :argtype do
+      optional :setup, :message, 1, "grpc.testing.ClientConfig"
+      optional :mark, :message, 2, "grpc.testing.Mark"
+    end
+  end
+  add_message "grpc.testing.ServerConfig" do
+    optional :server_type, :enum, 1, "grpc.testing.ServerType"
+    optional :security_params, :message, 2, "grpc.testing.SecurityParams"
+    optional :port, :int32, 4
+    optional :async_server_threads, :int32, 7
+    optional :core_limit, :int32, 8
+    optional :payload_config, :message, 9, "grpc.testing.PayloadConfig"
+    repeated :core_list, :int32, 10
+  end
+  add_message "grpc.testing.ServerArgs" do
+    oneof :argtype do
+      optional :setup, :message, 1, "grpc.testing.ServerConfig"
+      optional :mark, :message, 2, "grpc.testing.Mark"
+    end
+  end
+  add_message "grpc.testing.ServerStatus" do
+    optional :stats, :message, 1, "grpc.testing.ServerStats"
+    optional :port, :int32, 2
+    optional :cores, :int32, 3
+  end
+  add_message "grpc.testing.CoreRequest" do
+  end
+  add_message "grpc.testing.CoreResponse" do
+    optional :cores, :int32, 1
+  end
+  add_message "grpc.testing.Void" do
+  end
+  add_enum "grpc.testing.ClientType" do
+    value :SYNC_CLIENT, 0
+    value :ASYNC_CLIENT, 1
+  end
+  add_enum "grpc.testing.ServerType" do
+    value :SYNC_SERVER, 0
+    value :ASYNC_SERVER, 1
+    value :ASYNC_GENERIC_SERVER, 2
+  end
+  add_enum "grpc.testing.RpcType" do
+    value :UNARY, 0
+    value :STREAMING, 1
+  end
+end
+
+module Grpc
+  module Testing
+    PoissonParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.PoissonParams").msgclass
+    UniformParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.UniformParams").msgclass
+    DeterministicParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.DeterministicParams").msgclass
+    ParetoParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ParetoParams").msgclass
+    ClosedLoopParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ClosedLoopParams").msgclass
+    LoadParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.LoadParams").msgclass
+    SecurityParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.SecurityParams").msgclass
+    ClientConfig = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ClientConfig").msgclass
+    ClientStatus = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ClientStatus").msgclass
+    Mark = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.Mark").msgclass
+    ClientArgs = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ClientArgs").msgclass
+    ServerConfig = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ServerConfig").msgclass
+    ServerArgs = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ServerArgs").msgclass
+    ServerStatus = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ServerStatus").msgclass
+    CoreRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.CoreRequest").msgclass
+    CoreResponse = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.CoreResponse").msgclass
+    Void = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.Void").msgclass
+    ClientType = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ClientType").enummodule
+    ServerType = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ServerType").enummodule
+    RpcType = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.RpcType").enummodule
+  end
+end
diff --git a/src/ruby/qps/src/proto/grpc/testing/messages.rb b/src/ruby/qps/src/proto/grpc/testing/messages.rb
new file mode 100644
index 0000000000..b9c32dbef5
--- /dev/null
+++ b/src/ruby/qps/src/proto/grpc/testing/messages.rb
@@ -0,0 +1,80 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: src/proto/grpc/testing/messages.proto
+
+require 'google/protobuf'
+
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "grpc.testing.Payload" do
+    optional :type, :enum, 1, "grpc.testing.PayloadType"
+    optional :body, :bytes, 2
+  end
+  add_message "grpc.testing.EchoStatus" do
+    optional :code, :int32, 1
+    optional :message, :string, 2
+  end
+  add_message "grpc.testing.SimpleRequest" do
+    optional :response_type, :enum, 1, "grpc.testing.PayloadType"
+    optional :response_size, :int32, 2
+    optional :payload, :message, 3, "grpc.testing.Payload"
+    optional :fill_username, :bool, 4
+    optional :fill_oauth_scope, :bool, 5
+    optional :response_compression, :enum, 6, "grpc.testing.CompressionType"
+    optional :response_status, :message, 7, "grpc.testing.EchoStatus"
+  end
+  add_message "grpc.testing.SimpleResponse" do
+    optional :payload, :message, 1, "grpc.testing.Payload"
+    optional :username, :string, 2
+    optional :oauth_scope, :string, 3
+  end
+  add_message "grpc.testing.StreamingInputCallRequest" do
+    optional :payload, :message, 1, "grpc.testing.Payload"
+  end
+  add_message "grpc.testing.StreamingInputCallResponse" do
+    optional :aggregated_payload_size, :int32, 1
+  end
+  add_message "grpc.testing.ResponseParameters" do
+    optional :size, :int32, 1
+    optional :interval_us, :int32, 2
+  end
+  add_message "grpc.testing.StreamingOutputCallRequest" do
+    optional :response_type, :enum, 1, "grpc.testing.PayloadType"
+    repeated :response_parameters, :message, 2, "grpc.testing.ResponseParameters"
+    optional :payload, :message, 3, "grpc.testing.Payload"
+    optional :response_compression, :enum, 6, "grpc.testing.CompressionType"
+    optional :response_status, :message, 7, "grpc.testing.EchoStatus"
+  end
+  add_message "grpc.testing.StreamingOutputCallResponse" do
+    optional :payload, :message, 1, "grpc.testing.Payload"
+  end
+  add_message "grpc.testing.ReconnectInfo" do
+    optional :passed, :bool, 1
+    repeated :backoff_ms, :int32, 2
+  end
+  add_enum "grpc.testing.PayloadType" do
+    value :COMPRESSABLE, 0
+    value :UNCOMPRESSABLE, 1
+    value :RANDOM, 2
+  end
+  add_enum "grpc.testing.CompressionType" do
+    value :NONE, 0
+    value :GZIP, 1
+    value :DEFLATE, 2
+  end
+end
+
+module Grpc
+  module Testing
+    Payload = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.Payload").msgclass
+    EchoStatus = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.EchoStatus").msgclass
+    SimpleRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.SimpleRequest").msgclass
+    SimpleResponse = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.SimpleResponse").msgclass
+    StreamingInputCallRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.StreamingInputCallRequest").msgclass
+    StreamingInputCallResponse = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.StreamingInputCallResponse").msgclass
+    ResponseParameters = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ResponseParameters").msgclass
+    StreamingOutputCallRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.StreamingOutputCallRequest").msgclass
+    StreamingOutputCallResponse = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.StreamingOutputCallResponse").msgclass
+    ReconnectInfo = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ReconnectInfo").msgclass
+    PayloadType = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.PayloadType").enummodule
+    CompressionType = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.CompressionType").enummodule
+  end
+end
diff --git a/src/ruby/qps/src/proto/grpc/testing/payloads.rb b/src/ruby/qps/src/proto/grpc/testing/payloads.rb
new file mode 100644
index 0000000000..ae8855f685
--- /dev/null
+++ b/src/ruby/qps/src/proto/grpc/testing/payloads.rb
@@ -0,0 +1,33 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: src/proto/grpc/testing/payloads.proto
+
+require 'google/protobuf'
+
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "grpc.testing.ByteBufferParams" do
+    optional :req_size, :int32, 1
+    optional :resp_size, :int32, 2
+  end
+  add_message "grpc.testing.SimpleProtoParams" do
+    optional :req_size, :int32, 1
+    optional :resp_size, :int32, 2
+  end
+  add_message "grpc.testing.ComplexProtoParams" do
+  end
+  add_message "grpc.testing.PayloadConfig" do
+    oneof :payload do
+      optional :bytebuf_params, :message, 1, "grpc.testing.ByteBufferParams"
+      optional :simple_params, :message, 2, "grpc.testing.SimpleProtoParams"
+      optional :complex_params, :message, 3, "grpc.testing.ComplexProtoParams"
+    end
+  end
+end
+
+module Grpc
+  module Testing
+    ByteBufferParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ByteBufferParams").msgclass
+    SimpleProtoParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.SimpleProtoParams").msgclass
+    ComplexProtoParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ComplexProtoParams").msgclass
+    PayloadConfig = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.PayloadConfig").msgclass
+  end
+end
diff --git a/src/ruby/qps/src/proto/grpc/testing/services.rb b/src/ruby/qps/src/proto/grpc/testing/services.rb
new file mode 100644
index 0000000000..b2675c2afe
--- /dev/null
+++ b/src/ruby/qps/src/proto/grpc/testing/services.rb
@@ -0,0 +1,14 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: src/proto/grpc/testing/services.proto
+
+require 'google/protobuf'
+
+require 'src/proto/grpc/testing/messages'
+require 'src/proto/grpc/testing/control'
+Google::Protobuf::DescriptorPool.generated_pool.build do
+end
+
+module Grpc
+  module Testing
+  end
+end
diff --git a/src/ruby/qps/src/proto/grpc/testing/services_services.rb b/src/ruby/qps/src/proto/grpc/testing/services_services.rb
new file mode 100644
index 0000000000..3fd9f20f47
--- /dev/null
+++ b/src/ruby/qps/src/proto/grpc/testing/services_services.rb
@@ -0,0 +1,46 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# Source: src/proto/grpc/testing/services.proto for package 'grpc.testing'
+
+require 'grpc'
+require 'src/proto/grpc/testing/services'
+
+module Grpc
+  module Testing
+    module BenchmarkService
+
+      # TODO: add proto service documentation here
+      class Service
+
+        include GRPC::GenericService
+
+        self.marshal_class_method = :encode
+        self.unmarshal_class_method = :decode
+        self.service_name = 'grpc.testing.BenchmarkService'
+
+        rpc :UnaryCall, SimpleRequest, SimpleResponse
+        rpc :StreamingCall, stream(SimpleRequest), stream(SimpleResponse)
+      end
+
+      Stub = Service.rpc_stub_class
+    end
+    module WorkerService
+
+      # TODO: add proto service documentation here
+      class Service
+
+        include GRPC::GenericService
+
+        self.marshal_class_method = :encode
+        self.unmarshal_class_method = :decode
+        self.service_name = 'grpc.testing.WorkerService'
+
+        rpc :RunServer, stream(ServerArgs), stream(ServerStatus)
+        rpc :RunClient, stream(ClientArgs), stream(ClientStatus)
+        rpc :CoreCount, CoreRequest, CoreResponse
+        rpc :QuitWorker, Void, Void
+      end
+
+      Stub = Service.rpc_stub_class
+    end
+  end
+end
diff --git a/src/ruby/qps/src/proto/grpc/testing/stats.rb b/src/ruby/qps/src/proto/grpc/testing/stats.rb
new file mode 100644
index 0000000000..41f75bedf0
--- /dev/null
+++ b/src/ruby/qps/src/proto/grpc/testing/stats.rb
@@ -0,0 +1,39 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: src/proto/grpc/testing/stats.proto
+
+require 'google/protobuf'
+
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "grpc.testing.ServerStats" do
+    optional :time_elapsed, :double, 1
+    optional :time_user, :double, 2
+    optional :time_system, :double, 3
+  end
+  add_message "grpc.testing.HistogramParams" do
+    optional :resolution, :double, 1
+    optional :max_possible, :double, 2
+  end
+  add_message "grpc.testing.HistogramData" do
+    repeated :bucket, :uint32, 1
+    optional :min_seen, :double, 2
+    optional :max_seen, :double, 3
+    optional :sum, :double, 4
+    optional :sum_of_squares, :double, 5
+    optional :count, :double, 6
+  end
+  add_message "grpc.testing.ClientStats" do
+    optional :latencies, :message, 1, "grpc.testing.HistogramData"
+    optional :time_elapsed, :double, 2
+    optional :time_user, :double, 3
+    optional :time_system, :double, 4
+  end
+end
+
+module Grpc
+  module Testing
+    ServerStats = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ServerStats").msgclass
+    HistogramParams = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.HistogramParams").msgclass
+    HistogramData = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.HistogramData").msgclass
+    ClientStats = Google::Protobuf::DescriptorPool.generated_pool.lookup("grpc.testing.ClientStats").msgclass
+  end
+end
diff --git a/src/ruby/qps/worker.rb b/src/ruby/qps/worker.rb
new file mode 100755
index 0000000000..7c29204cc2
--- /dev/null
+++ b/src/ruby/qps/worker.rb
@@ -0,0 +1,128 @@
+#!/usr/bin/env ruby
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Worker and worker service implementation
+
+this_dir = File.expand_path(File.dirname(__FILE__))
+lib_dir = File.join(File.dirname(this_dir), 'lib')
+$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)
+$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)
+
+require 'grpc'
+require 'optparse'
+require 'histogram'
+require 'etc'
+require 'facter'
+require 'client'
+require 'qps-common'
+require 'server'
+require 'src/proto/grpc/testing/services_services'
+
+class WorkerServiceImpl < Grpc::Testing::WorkerService::Service
+  def cpu_cores
+    Facter.value('processors')['count']
+  end
+  def run_server(reqs)
+    q = EnumeratorQueue.new(self)
+    Thread.new {
+      bms = ''
+      gtss = Grpc::Testing::ServerStatus
+      reqs.each do |req|        
+        case req.argtype.to_s
+        when 'setup'
+          bms = BenchmarkServer.new(req.setup, @server_port)
+          q.push(gtss.new(stats: bms.mark(false), port: bms.get_port))
+        when 'mark'         
+          q.push(gtss.new(stats: bms.mark(req.mark.reset), cores: cpu_cores))
+        end
+      end
+      q.push(self)
+      bms.stop
+    }
+    q.each_item
+  end
+  def run_client(reqs)
+    q = EnumeratorQueue.new(self)
+    Thread.new {
+      client = ''
+      reqs.each do |req|
+        case req.argtype.to_s
+        when 'setup'
+          client = BenchmarkClient.new(req.setup)
+          q.push(Grpc::Testing::ClientStatus.new(stats: client.mark(false)))
+        when 'mark'
+          q.push(Grpc::Testing::ClientStatus.new(stats:
+                                                   client.mark(req.mark.reset)))
+        end
+      end
+      q.push(self)
+      client.shutdown
+    }
+    q.each_item
+  end
+  def core_count(_args, _call)
+    Grpc::Testing::CoreResponse.new(cores: cpu_cores)
+  end
+  def quit_worker(_args, _call)
+    Thread.new {
+      sleep 3
+      @server.stop
+    }
+    Grpc::Testing::Void.new
+  end
+  def initialize(s, sp)
+    @server = s
+    @server_port = sp
+  end
+end
+
+def main
+  options = {
+    'driver_port' => 0,
+    'server_port' => 0
+  }
+  OptionParser.new do |opts|
+    opts.banner = 'Usage: [--driver_port <port>] [--server_port <port>]'
+    opts.on('--driver_port PORT', '<port>') do |v|
+      options['driver_port'] = v
+    end
+    opts.on('--server_port PORT', '<port>') do |v|
+      options['server_port'] = v
+    end
+  end.parse!
+  s = GRPC::RpcServer.new
+  s.add_http2_port("0.0.0.0:" + options['driver_port'].to_s,
+                   :this_port_is_insecure)
+  s.handle(WorkerServiceImpl.new(s, options['server_port'].to_i))
+  s.run
+end
+
+main
diff --git a/src/ruby/spec/client_server_spec.rb b/src/ruby/spec/client_server_spec.rb
index 7ef534571f..aedeca272d 100644
--- a/src/ruby/spec/client_server_spec.rb
+++ b/src/ruby/spec/client_server_spec.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/spec/generic/rpc_server_spec.rb b/src/ruby/spec/generic/rpc_server_spec.rb
index dfaec6d6ed..e16ba60387 100644
--- a/src/ruby/spec/generic/rpc_server_spec.rb
+++ b/src/ruby/spec/generic/rpc_server_spec.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/spec/pb/health/checker_spec.rb b/src/ruby/spec/pb/health/checker_spec.rb
index 9bb79bb4ca..5523347f45 100644
--- a/src/ruby/spec/pb/health/checker_spec.rb
+++ b/src/ruby/spec/pb/health/checker_spec.rb
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/zlib/gen_build_yaml.py b/src/zlib/gen_build_yaml.py
index 4bd557367a..0692edb753 100755
--- a/src/zlib/gen_build_yaml.py
+++ b/src/zlib/gen_build_yaml.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python2.7
 
-# Copyright 2015-2016, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without