diff options
| author |  Craig Tiller <ctiller@google.com> | 2017-09-07 12:52:44 -0700 |
|---|---|---|
| committer | Craig Tiller <ctiller@google.com> | 2017-09-07 12:52:44 -0700 |
| commit | ff952d292f3fb843f91ef7e0e5ec8772ec3038c5 (patch) | |
| tree | 0f10b623c6482c583545517845bd6ee0b7a8d3db | |
| parent | ebec0dba9f9dbcf13e523420e718462eecc1f216 (diff) | |
| parent | f54af4832e08f317a05de909e88fdb38ace92cb0 (diff) | |
Merge github.com:grpc/grpc into write_completion
31 files changed, 262 insertions, 3503 deletions
@@ -585,8 +585,6 @@ grpc_cc_library( "src/core/lib/iomgr/endpoint_pair_windows.c", "src/core/lib/iomgr/error.c", "src/core/lib/iomgr/ev_epoll1_linux.c", - "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c", - "src/core/lib/iomgr/ev_epoll_thread_pool_linux.c", "src/core/lib/iomgr/ev_epollex_linux.c", "src/core/lib/iomgr/ev_epollsig_linux.c", "src/core/lib/iomgr/ev_poll_posix.c", @@ -716,8 +714,6 @@ grpc_cc_library( "src/core/lib/iomgr/error.h", "src/core/lib/iomgr/error_internal.h", "src/core/lib/iomgr/ev_epoll1_linux.h", - "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h", - "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h", "src/core/lib/iomgr/ev_epollex_linux.h", "src/core/lib/iomgr/ev_epollsig_linux.h", "src/core/lib/iomgr/ev_poll_posix.h", diff --git a/CMakeLists.txt b/CMakeLists.txt index b22aa1899e..e8994a044e 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -981,8 +981,6 @@ add_library(grpc src/core/lib/iomgr/endpoint_pair_windows.c src/core/lib/iomgr/error.c src/core/lib/iomgr/ev_epoll1_linux.c - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c src/core/lib/iomgr/ev_epollex_linux.c src/core/lib/iomgr/ev_epollsig_linux.c src/core/lib/iomgr/ev_poll_posix.c @@ -1332,8 +1330,6 @@ add_library(grpc_cronet src/core/lib/iomgr/endpoint_pair_windows.c src/core/lib/iomgr/error.c src/core/lib/iomgr/ev_epoll1_linux.c - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c src/core/lib/iomgr/ev_epollex_linux.c src/core/lib/iomgr/ev_epollsig_linux.c src/core/lib/iomgr/ev_poll_posix.c @@ -1651,8 +1647,6 @@ add_library(grpc_test_util src/core/lib/iomgr/endpoint_pair_windows.c src/core/lib/iomgr/error.c src/core/lib/iomgr/ev_epoll1_linux.c - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c src/core/lib/iomgr/ev_epollex_linux.c src/core/lib/iomgr/ev_epollsig_linux.c src/core/lib/iomgr/ev_poll_posix.c @@ -1914,8 +1908,6 @@ add_library(grpc_test_util_unsecure src/core/lib/iomgr/endpoint_pair_windows.c src/core/lib/iomgr/error.c src/core/lib/iomgr/ev_epoll1_linux.c - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c src/core/lib/iomgr/ev_epollex_linux.c src/core/lib/iomgr/ev_epollsig_linux.c src/core/lib/iomgr/ev_poll_posix.c @@ -2163,8 +2155,6 @@ add_library(grpc_unsecure src/core/lib/iomgr/endpoint_pair_windows.c src/core/lib/iomgr/error.c src/core/lib/iomgr/ev_epoll1_linux.c - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c src/core/lib/iomgr/ev_epollex_linux.c src/core/lib/iomgr/ev_epollsig_linux.c src/core/lib/iomgr/ev_poll_posix.c @@ -2864,8 +2854,6 @@ add_library(grpc++_cronet src/core/lib/iomgr/endpoint_pair_windows.c src/core/lib/iomgr/error.c src/core/lib/iomgr/ev_epoll1_linux.c - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c src/core/lib/iomgr/ev_epollex_linux.c src/core/lib/iomgr/ev_epollsig_linux.c src/core/lib/iomgr/ev_poll_posix.c @@ -2928,8 +2928,6 @@ LIBGRPC_SRC = \ src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ @@ -3277,8 +3275,6 @@ LIBGRPC_CRONET_SRC = \ src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ @@ -3593,8 +3589,6 @@ LIBGRPC_TEST_UTIL_SRC = \ src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ @@ -3845,8 +3839,6 @@ LIBGRPC_TEST_UTIL_UNSECURE_SRC = \ src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ @@ -4070,8 +4062,6 @@ LIBGRPC_UNSECURE_SRC = \ src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ @@ -4754,8 +4744,6 @@ LIBGRPC++_CRONET_SRC = \ src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ diff --git a/binding.gyp b/binding.gyp index 946edd8139..6c92c96b18 100644 --- a/binding.gyp +++ b/binding.gyp @@ -680,8 +680,6 @@ 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', diff --git a/build.yaml b/build.yaml index 7d8440ce44..a065bcd24f 100644 --- a/build.yaml +++ b/build.yaml @@ -208,8 +208,6 @@ filegroups: - src/core/lib/iomgr/endpoint_pair_windows.c - src/core/lib/iomgr/error.c - src/core/lib/iomgr/ev_epoll1_linux.c - - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c - - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c - src/core/lib/iomgr/ev_epollex_linux.c - src/core/lib/iomgr/ev_epollsig_linux.c - src/core/lib/iomgr/ev_poll_posix.c @@ -359,8 +357,6 @@ filegroups: - src/core/lib/iomgr/error.h - src/core/lib/iomgr/error_internal.h - src/core/lib/iomgr/ev_epoll1_linux.h - - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h - - src/core/lib/iomgr/ev_epoll_thread_pool_linux.h - src/core/lib/iomgr/ev_epollex_linux.h - src/core/lib/iomgr/ev_epollsig_linux.h - src/core/lib/iomgr/ev_poll_posix.h @@ -109,8 +109,6 @@ if test "$PHP_GRPC" != "no"; then src/core/lib/iomgr/endpoint_pair_windows.c \ src/core/lib/iomgr/error.c \ src/core/lib/iomgr/ev_epoll1_linux.c \ - src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ - src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollsig_linux.c \ src/core/lib/iomgr/ev_poll_posix.c \ diff --git a/config.w32 b/config.w32 index 640115e861..f087bc0ca6 100644 --- a/config.w32 +++ b/config.w32 @@ -86,8 +86,6 @@ if (PHP_GRPC != "no") { "src\\core\\lib\\iomgr\\endpoint_pair_windows.c " + "src\\core\\lib\\iomgr\\error.c " + "src\\core\\lib\\iomgr\\ev_epoll1_linux.c " + - "src\\core\\lib\\iomgr\\ev_epoll_limited_pollers_linux.c " + - "src\\core\\lib\\iomgr\\ev_epoll_thread_pool_linux.c " + "src\\core\\lib\\iomgr\\ev_epollex_linux.c " + "src\\core\\lib\\iomgr\\ev_epollsig_linux.c " + "src\\core\\lib\\iomgr\\ev_poll_posix.c " + diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec index 66368b1b4b..3dfb1e0815 100644 --- a/gRPC-Core.podspec +++ b/gRPC-Core.podspec @@ -341,8 +341,6 @@ Pod::Spec.new do |s| 'src/core/lib/iomgr/error.h', 'src/core/lib/iomgr/error_internal.h', 'src/core/lib/iomgr/ev_epoll1_linux.h', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.h', 'src/core/lib/iomgr/ev_epollex_linux.h', 'src/core/lib/iomgr/ev_epollsig_linux.h', 'src/core/lib/iomgr/ev_poll_posix.h', @@ -492,8 +490,6 @@ Pod::Spec.new do |s| 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', @@ -838,8 +834,6 @@ Pod::Spec.new do |s| 'src/core/lib/iomgr/error.h', 'src/core/lib/iomgr/error_internal.h', 'src/core/lib/iomgr/ev_epoll1_linux.h', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.h', 'src/core/lib/iomgr/ev_epollex_linux.h', 'src/core/lib/iomgr/ev_epollsig_linux.h', 'src/core/lib/iomgr/ev_poll_posix.h', diff --git a/grpc.gemspec b/grpc.gemspec index d3779a9991..9ad9b4c2c4 100644 --- a/grpc.gemspec +++ b/grpc.gemspec @@ -273,8 +273,6 @@ Gem::Specification.new do |s| s.files += %w( src/core/lib/iomgr/error.h ) s.files += %w( src/core/lib/iomgr/error_internal.h ) s.files += %w( src/core/lib/iomgr/ev_epoll1_linux.h ) - s.files += %w( src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h ) - s.files += %w( src/core/lib/iomgr/ev_epoll_thread_pool_linux.h ) s.files += %w( src/core/lib/iomgr/ev_epollex_linux.h ) s.files += %w( src/core/lib/iomgr/ev_epollsig_linux.h ) s.files += %w( src/core/lib/iomgr/ev_poll_posix.h ) @@ -428,8 +426,6 @@ Gem::Specification.new do |s| s.files += %w( src/core/lib/iomgr/endpoint_pair_windows.c ) s.files += %w( src/core/lib/iomgr/error.c ) s.files += %w( src/core/lib/iomgr/ev_epoll1_linux.c ) - s.files += %w( src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c ) - s.files += %w( src/core/lib/iomgr/ev_epoll_thread_pool_linux.c ) s.files += %w( src/core/lib/iomgr/ev_epollex_linux.c ) s.files += %w( src/core/lib/iomgr/ev_epollsig_linux.c ) s.files += %w( src/core/lib/iomgr/ev_poll_posix.c ) @@ -246,8 +246,6 @@ 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', @@ -546,8 +544,6 @@ 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', @@ -751,8 +747,6 @@ 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', @@ -941,8 +935,6 @@ 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h index 3fa208963d..c1784f1820 100644 --- a/include/grpc++/impl/codegen/sync_stream.h +++ b/include/grpc++/impl/codegen/sync_stream.h @@ -244,7 +244,7 @@ class ClientWriterInterface : public ClientStreamingInterface, public WriterInterface<W> { public: /// Half close writing from the client. (signal that the stream of messages - /// coming from the clinet is complete). + /// coming from the client is complete). /// Blocks until currently-pending writes are completed. /// Thread safe with respect to \a ReaderInterface::Read operations only /// @@ -375,7 +375,7 @@ class ClientReaderWriterInterface : public ClientStreamingInterface, virtual void WaitForInitialMetadata() = 0; /// Half close writing from the client. (signal that the stream of messages - /// coming from the clinet is complete). + /// coming from the client is complete). /// Blocks until currently-pending writes are completed. /// Thread-safe with respect to \a ReaderInterface::Read /// diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h index a04c683a55..128fa8e121 100644 --- a/include/grpc/impl/codegen/slice.h +++ b/include/grpc/impl/codegen/slice.h @@ -62,7 +62,12 @@ typedef struct grpc_slice_refcount { struct grpc_slice_refcount *sub_refcount; } grpc_slice_refcount; -#define GRPC_SLICE_INLINED_SIZE (sizeof(size_t) + sizeof(uint8_t *) - 1) +/* Inlined half of grpc_slice is allowed to expand the size of the overall type + by this many bytes */ +#define GRPC_SLICE_INLINE_EXTRA_SIZE sizeof(void *) + +#define GRPC_SLICE_INLINED_SIZE \ + (sizeof(size_t) + sizeof(uint8_t *) - 1 + GRPC_SLICE_INLINE_EXTRA_SIZE) /** A grpc_slice s, if initialized, represents the byte range s.bytes[0..s.length-1]. diff --git a/package.xml b/package.xml index 1cca4fbddd..55e46a1bf5 100644 --- a/package.xml +++ b/package.xml @@ -283,8 +283,6 @@ <file baseinstalldir="/" name="src/core/lib/iomgr/error.h" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/error_internal.h" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll1_linux.h" role="src" /> - <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h" role="src" /> - <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_thread_pool_linux.h" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epollex_linux.h" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epollsig_linux.h" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.h" role="src" /> @@ -438,8 +436,6 @@ <file baseinstalldir="/" name="src/core/lib/iomgr/endpoint_pair_windows.c" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/error.c" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll1_linux.c" role="src" /> - <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c" role="src" /> - <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epoll_thread_pool_linux.c" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epollex_linux.c" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_epollsig_linux.c" role="src" /> <file baseinstalldir="/" name="src/core/lib/iomgr/ev_poll_posix.c" role="src" /> diff --git a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c index 56ed4371a9..3ff081a514 100644 --- a/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c +++ b/src/core/ext/filters/client_channel/resolver/fake/fake_resolver.c @@ -32,6 +32,7 @@ #include "src/core/ext/filters/client_channel/parse_address.h" #include "src/core/ext/filters/client_channel/resolver_registry.h" #include "src/core/lib/channel/channel_args.h" +#include "src/core/lib/iomgr/closure.h" #include "src/core/lib/iomgr/combiner.h" #include "src/core/lib/iomgr/resolve_address.h" #include "src/core/lib/iomgr/unix_sockets_posix.h" @@ -125,7 +126,6 @@ static const grpc_resolver_vtable fake_resolver_vtable = { struct grpc_fake_resolver_response_generator { fake_resolver* resolver; // Set by the fake_resolver constructor to itself. - grpc_channel_args* next_response; gpr_refcount refcount; }; @@ -151,19 +151,26 @@ void grpc_fake_resolver_response_generator_unref( } } -static void set_response_cb(grpc_exec_ctx* exec_ctx, void* arg, - grpc_error* error) { - grpc_fake_resolver_response_generator* generator = - (grpc_fake_resolver_response_generator*)arg; +typedef struct set_response_closure_arg { + grpc_closure set_response_closure; + grpc_fake_resolver_response_generator* generator; + grpc_channel_args* next_response; +} set_response_closure_arg; + +static void set_response_closure_fn(grpc_exec_ctx* exec_ctx, void* arg, + grpc_error* error) { + set_response_closure_arg* closure_arg = arg; + grpc_fake_resolver_response_generator* generator = closure_arg->generator; fake_resolver* r = generator->resolver; if (r->next_results != NULL) { grpc_channel_args_destroy(exec_ctx, r->next_results); } - r->next_results = generator->next_response; + r->next_results = closure_arg->next_response; if (r->results_upon_error != NULL) { grpc_channel_args_destroy(exec_ctx, r->results_upon_error); } - r->results_upon_error = grpc_channel_args_copy(generator->next_response); + r->results_upon_error = grpc_channel_args_copy(closure_arg->next_response); + gpr_free(closure_arg); fake_resolver_maybe_finish_next_locked(exec_ctx, r); } @@ -171,12 +178,15 @@ void grpc_fake_resolver_response_generator_set_response( grpc_exec_ctx* exec_ctx, grpc_fake_resolver_response_generator* generator, grpc_channel_args* next_response) { GPR_ASSERT(generator->resolver != NULL); - generator->next_response = grpc_channel_args_copy(next_response); - GRPC_CLOSURE_SCHED( - exec_ctx, GRPC_CLOSURE_CREATE(set_response_cb, generator, - grpc_combiner_scheduler( - generator->resolver->base.combiner)), - GRPC_ERROR_NONE); + set_response_closure_arg* closure_arg = gpr_zalloc(sizeof(*closure_arg)); + closure_arg->generator = generator; + closure_arg->next_response = grpc_channel_args_copy(next_response); + GRPC_CLOSURE_SCHED(exec_ctx, + GRPC_CLOSURE_INIT(&closure_arg->set_response_closure, + set_response_closure_fn, closure_arg, + grpc_combiner_scheduler( + generator->resolver->base.combiner)), + GRPC_ERROR_NONE); } static void* response_generator_arg_copy(void* p) { diff --git a/src/core/lib/iomgr/ev_epoll1_linux.c b/src/core/lib/iomgr/ev_epoll1_linux.c index 7f053fa728..b76eb9e1c9 100644 --- a/src/core/lib/iomgr/ev_epoll1_linux.c +++ b/src/core/lib/iomgr/ev_epoll1_linux.c @@ -698,22 +698,30 @@ static bool begin_worker(grpc_pollset *pollset, grpc_pollset_worker *worker, gpr_mu_unlock(&pollset->mu); goto retry_lock_neighbourhood; } - pollset->seen_inactive = false; - if (neighbourhood->active_root == NULL) { - neighbourhood->active_root = pollset->next = pollset->prev = pollset; - /* TODO: sreek. Why would this worker state be other than UNKICKED - * here ? (since the worker isn't added to the pollset yet, there is no - * way it can be "found" by other threads to get kicked). */ - - /* If there is no designated poller, make this the designated poller */ - if (worker->kick_state == UNKICKED && - gpr_atm_no_barrier_cas(&g_active_poller, 0, (gpr_atm)worker)) { - SET_KICK_STATE(worker, DESIGNATED_POLLER); + + /* In the brief time we released the pollset locks above, the worker MAY + have been kicked. In this case, the worker should get out of this + pollset ASAP and hence this should neither add the pollset to + neighbourhood nor mark the pollset as active. + + On a side note, the only way a worker's kick state could have changed + at this point is if it were "kicked specifically". Since the worker has + not added itself to the pollset yet (by calling worker_insert()), it is + not visible in the "kick any" path yet */ + if (worker->kick_state == UNKICKED) { + pollset->seen_inactive = false; + if (neighbourhood->active_root == NULL) { + neighbourhood->active_root = pollset->next = pollset->prev = pollset; + /* Make this the designated poller if there isn't one already */ + if (worker->kick_state == UNKICKED && + gpr_atm_no_barrier_cas(&g_active_poller, 0, (gpr_atm)worker)) { + SET_KICK_STATE(worker, DESIGNATED_POLLER); + } + } else { + pollset->next = neighbourhood->active_root; + pollset->prev = pollset->next->prev; + pollset->next->prev = pollset->prev->next = pollset; } - } else { - pollset->next = neighbourhood->active_root; - pollset->prev = pollset->next->prev; - pollset->next->prev = pollset->prev->next = pollset; } } if (is_reassigning) { @@ -1001,6 +1009,7 @@ static grpc_error *pollset_kick(grpc_pollset *pollset, gpr_log(GPR_ERROR, "%s", tmp); gpr_free(tmp); } + if (specific_worker == NULL) { if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)pollset) { grpc_pollset_worker *root_worker = pollset->root_worker; @@ -1076,7 +1085,11 @@ static grpc_error *pollset_kick(grpc_pollset *pollset, } goto done; } - } else if (specific_worker->kick_state == KICKED) { + + GPR_UNREACHABLE_CODE(goto done); + } + + if (specific_worker->kick_state == KICKED) { if (GRPC_TRACER_ON(grpc_polling_trace)) { gpr_log(GPR_ERROR, " .. specific worker already kicked"); } diff --git a/src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c b/src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c deleted file mode 100644 index e2e3cd9003..0000000000 --- a/src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c +++ /dev/null @@ -1,1961 +0,0 @@ -/* - * - * Copyright 2017 gRPC authors. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ - -#include "src/core/lib/iomgr/port.h" - -/* This polling engine is only relevant on linux kernels supporting epoll() */ -#ifdef GRPC_LINUX_EPOLL - -#include "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h" - -#include <assert.h> -#include <errno.h> -#include <limits.h> -#include <poll.h> -#include <pthread.h> -#include <signal.h> -#include <string.h> -#include <sys/epoll.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/debug/stats.h" -#include "src/core/lib/debug/trace.h" -#include "src/core/lib/iomgr/ev_posix.h" -#include "src/core/lib/iomgr/iomgr_internal.h" -#include "src/core/lib/iomgr/lockfree_event.h" -#include "src/core/lib/iomgr/timer.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" -#include "src/core/lib/support/env.h" - -#define GRPC_POLLING_TRACE(fmt, ...) \ - if (GRPC_TRACER_ON(grpc_polling_trace)) { \ - gpr_log(GPR_INFO, (fmt), __VA_ARGS__); \ - } - -#define GRPC_POLLSET_KICK_BROADCAST ((grpc_pollset_worker *)1) - -/* The maximum number of polling threads per polling island. By default no - limit */ -static int g_max_pollers_per_pi = INT_MAX; - -static int grpc_wakeup_signal = -1; -static bool is_grpc_wakeup_signal_initialized = false; - -/* Implements the function defined in grpc_posix.h. This function might be - * called before even calling grpc_init() to set either a different signal to - * use. If signum == -1, then the use of signals is disabled */ -static void grpc_use_signal(int signum) { - grpc_wakeup_signal = signum; - is_grpc_wakeup_signal_initialized = true; - - if (grpc_wakeup_signal < 0) { - gpr_log(GPR_INFO, - "Use of signals is disabled. Epoll engine will not be used"); - } else { - gpr_log(GPR_INFO, "epoll engine will be using signal: %d", - grpc_wakeup_signal); - } -} - -struct polling_island; - -typedef enum { - POLL_OBJ_FD, - POLL_OBJ_POLLSET, - POLL_OBJ_POLLSET_SET -} poll_obj_type; - -typedef struct poll_obj { -#ifndef NDEBUG - poll_obj_type obj_type; -#endif - gpr_mu mu; - struct polling_island *pi; -} poll_obj; - -static const char *poll_obj_string(poll_obj_type po_type) { - switch (po_type) { - case POLL_OBJ_FD: - return "fd"; - case POLL_OBJ_POLLSET: - return "pollset"; - case POLL_OBJ_POLLSET_SET: - return "pollset_set"; - } - - GPR_UNREACHABLE_CODE(return "UNKNOWN"); -} - -/******************************************************************************* - * Fd Declarations - */ - -#define FD_FROM_PO(po) ((grpc_fd *)(po)) - -struct grpc_fd { - poll_obj po; - - int fd; - /* refst format: - bit 0 : 1=Active / 0=Orphaned - bits 1-n : refcount - Ref/Unref by two to avoid altering the orphaned bit */ - gpr_atm refst; - - /* The fd is either closed or we relinquished control of it. In either - cases, this indicates that the 'fd' on this structure is no longer - valid */ - bool orphaned; - - gpr_atm read_closure; - gpr_atm write_closure; - - struct grpc_fd *freelist_next; - grpc_closure *on_done_closure; - - /* The pollset that last noticed that the fd is readable. The actual type - * stored in this is (grpc_pollset *) */ - gpr_atm read_notifier_pollset; - - grpc_iomgr_object iomgr_object; -}; - -/* Reference counting for fds */ -#ifndef NDEBUG -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); - -/******************************************************************************* - * Polling island Declarations - */ - -#ifndef NDEBUG - -#define PI_ADD_REF(p, r) pi_add_ref_dbg((p), (r), __FILE__, __LINE__) -#define PI_UNREF(exec_ctx, p, r) \ - pi_unref_dbg((exec_ctx), (p), (r), __FILE__, __LINE__) - -#else - -#define PI_ADD_REF(p, r) pi_add_ref((p)) -#define PI_UNREF(exec_ctx, p, r) pi_unref((exec_ctx), (p)) - -#endif - -typedef struct worker_node { - struct worker_node *next; - struct worker_node *prev; -} worker_node; - -/* This is also used as grpc_workqueue (by directly casing it) */ -typedef struct polling_island { - gpr_mu mu; - /* Ref count. Use PI_ADD_REF() and PI_UNREF() macros to increment/decrement - the refcount. - Once the ref count becomes zero, this structure is destroyed which means - we should ensure that there is never a scenario where a PI_ADD_REF() is - racing with a PI_UNREF() that just made the ref_count zero. */ - gpr_atm ref_count; - - /* Pointer to the polling_island this merged into. - * merged_to value is only set once in polling_island's lifetime (and that too - * only if the island is merged with another island). Because of this, we can - * use gpr_atm type here so that we can do atomic access on this and reduce - * lock contention on 'mu' mutex. - * - * Note that if this field is not NULL (i.e not 0), all the remaining fields - * (except mu and ref_count) are invalid and must be ignored. */ - gpr_atm merged_to; - - /* Number of threads currently polling on this island */ - gpr_atm poller_count; - - /* The list of workers waiting to do polling on this polling island */ - gpr_mu worker_list_mu; - worker_node worker_list_head; - - /* The fd of the underlying epoll set */ - int epoll_fd; - - /* The file descriptors in the epoll set */ - size_t fd_cnt; - size_t fd_capacity; - grpc_fd **fds; -} polling_island; - -/******************************************************************************* - * Pollset Declarations - */ -#define WORKER_FROM_WORKER_LIST_NODE(p) \ - (struct grpc_pollset_worker *)(((char *)(p)) - \ - offsetof(grpc_pollset_worker, pi_list_link)) -struct grpc_pollset_worker { - /* Thread id of this worker */ - pthread_t pt_id; - - /* Used to prevent a worker from getting kicked multiple times */ - gpr_atm is_kicked; - - struct grpc_pollset_worker *next; - struct grpc_pollset_worker *prev; - - /* Indicates if it is this worker's turn to do epoll */ - gpr_atm is_polling_turn; - - /* Node in the polling island's worker list. */ - worker_node pi_list_link; -}; - -struct grpc_pollset { - poll_obj po; - - grpc_pollset_worker root_worker; - bool kicked_without_pollers; - - bool shutting_down; /* Is the pollset shutting down ? */ - bool finish_shutdown_called; /* Is the 'finish_shutdown_locked()' called ? */ - grpc_closure *shutdown_done; /* Called after after shutdown is complete */ -}; - -/******************************************************************************* - * Pollset-set Declarations - */ -struct grpc_pollset_set { - poll_obj po; -}; - -/******************************************************************************* - * Common helpers - */ - -static bool append_error(grpc_error **composite, grpc_error *error, - const char *desc) { - if (error == GRPC_ERROR_NONE) return true; - if (*composite == GRPC_ERROR_NONE) { - *composite = GRPC_ERROR_CREATE_FROM_COPIED_STRING(desc); - } - *composite = grpc_error_add_child(*composite, error); - return false; -} - -/******************************************************************************* - * Polling island Definitions - */ - -/* The wakeup fd that is used to wake up all threads in a Polling island. This - is useful in the polling island merge operation where we need to wakeup all - the threads currently polling the smaller polling island (so that they can - start polling the new/merged polling island) - - NOTE: This fd is initialized to be readable and MUST NOT be consumed i.e the - threads that woke up MUST NOT call grpc_wakeup_fd_consume_wakeup() */ -static grpc_wakeup_fd polling_island_wakeup_fd; - -/* The polling island being polled right now. - See comments in workqueue_maybe_wakeup for why this is tracked. */ -static __thread polling_island *g_current_thread_polling_island; - -/* Forward declaration */ -static void polling_island_delete(grpc_exec_ctx *exec_ctx, polling_island *pi); - -#ifdef GRPC_TSAN -/* Currently TSAN may incorrectly flag data races between epoll_ctl and - epoll_wait for any grpc_fd structs that are added to the epoll set via - epoll_ctl and are returned (within a very short window) via epoll_wait(). - - To work-around this race, we establish a happens-before relation between - the code just-before epoll_ctl() and the code after epoll_wait() by using - this atomic */ -gpr_atm g_epoll_sync; -#endif /* defined(GRPC_TSAN) */ - -static void pi_add_ref(polling_island *pi); -static void pi_unref(grpc_exec_ctx *exec_ctx, polling_island *pi); - -#ifndef NDEBUG -static void pi_add_ref_dbg(polling_island *pi, const char *reason, - const char *file, int line) { - if (GRPC_TRACER_ON(grpc_polling_trace)) { - gpr_atm old_cnt = gpr_atm_acq_load(&pi->ref_count); - gpr_log(GPR_DEBUG, "Add ref pi: %p, old:%" PRIdPTR " -> new:%" PRIdPTR - " (%s) - (%s, %d)", - pi, old_cnt, old_cnt + 1, reason, file, line); - } - pi_add_ref(pi); -} - -static void pi_unref_dbg(grpc_exec_ctx *exec_ctx, polling_island *pi, - const char *reason, const char *file, int line) { - if (GRPC_TRACER_ON(grpc_polling_trace)) { - gpr_atm old_cnt = gpr_atm_acq_load(&pi->ref_count); - gpr_log(GPR_DEBUG, "Unref pi: %p, old:%" PRIdPTR " -> new:%" PRIdPTR - " (%s) - (%s, %d)", - pi, old_cnt, (old_cnt - 1), reason, file, line); - } - pi_unref(exec_ctx, pi); -} -#endif - -static void pi_add_ref(polling_island *pi) { - gpr_atm_no_barrier_fetch_add(&pi->ref_count, 1); -} - -static void pi_unref(grpc_exec_ctx *exec_ctx, polling_island *pi) { - /* If ref count went to zero, delete the polling island. - Note that this deletion not be done under a lock. Once the ref count goes - to zero, we are guaranteed that no one else holds a reference to the - polling island (and that there is no racing pi_add_ref() call either). - - Also, if we are deleting the polling island and the merged_to field is - non-empty, we should remove a ref to the merged_to polling island - */ - if (1 == gpr_atm_full_fetch_add(&pi->ref_count, -1)) { - polling_island *next = (polling_island *)gpr_atm_acq_load(&pi->merged_to); - polling_island_delete(exec_ctx, pi); - if (next != NULL) { - PI_UNREF(exec_ctx, next, "pi_delete"); /* Recursive call */ - } - } -} - -static void worker_node_init(worker_node *node) { - node->next = node->prev = node; -} - -/* Not thread safe. Do under a list-level lock */ -static void push_back_worker_node(worker_node *head, worker_node *node) { - node->next = head; - node->prev = head->prev; - head->prev->next = node; - head->prev = node; -} - -/* Not thread safe. Do under a list-level lock */ -static void remove_worker_node(worker_node *node) { - node->next->prev = node->prev; - node->prev->next = node->next; - /* If node's next and prev point to itself, the node is considered detached - * from the list*/ - node->next = node->prev = node; -} - -/* Not thread safe. Do under a list-level lock */ -static worker_node *pop_front_worker_node(worker_node *head) { - worker_node *node = head->next; - if (node != head) { - remove_worker_node(node); - } else { - node = NULL; - } - - return node; -} - -/* Returns true if the node's next and prev are pointing to itself (which - indicates that the node is not in the list */ -static bool is_worker_node_detached(worker_node *node) { - return (node->next == node->prev && node->next == node); -} - -/* The caller is expected to hold pi->mu lock before calling this function - */ -static void polling_island_add_fds_locked(polling_island *pi, grpc_fd **fds, - size_t fd_count, bool add_fd_refs, - grpc_error **error) { - int err; - size_t i; - struct epoll_event ev; - char *err_msg; - const char *err_desc = "polling_island_add_fds"; - -#ifdef GRPC_TSAN - /* See the definition of g_epoll_sync for more context */ - gpr_atm_rel_store(&g_epoll_sync, (gpr_atm)0); -#endif /* defined(GRPC_TSAN) */ - - for (i = 0; i < fd_count; i++) { - ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET); - ev.data.ptr = fds[i]; - err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, fds[i]->fd, &ev); - - if (err < 0) { - if (errno != EEXIST) { - gpr_asprintf( - &err_msg, - "epoll_ctl (epoll_fd: %d) add fd: %d failed with error: %d (%s)", - pi->epoll_fd, fds[i]->fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } - - continue; - } - - if (pi->fd_cnt == pi->fd_capacity) { - pi->fd_capacity = GPR_MAX(pi->fd_capacity + 8, pi->fd_cnt * 3 / 2); - pi->fds = gpr_realloc(pi->fds, sizeof(grpc_fd *) * pi->fd_capacity); - } - - pi->fds[pi->fd_cnt++] = fds[i]; - if (add_fd_refs) { - GRPC_FD_REF(fds[i], "polling_island"); - } - } -} - -/* The caller is expected to hold pi->mu before calling this */ -static void polling_island_add_wakeup_fd_locked(polling_island *pi, - grpc_wakeup_fd *wakeup_fd, - grpc_error **error) { - struct epoll_event ev; - int err; - char *err_msg; - const char *err_desc = "polling_island_add_wakeup_fd"; - - ev.events = (uint32_t)(EPOLLIN | EPOLLET); - ev.data.ptr = wakeup_fd; - err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_ADD, - GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), &ev); - if (err < 0 && errno != EEXIST) { - gpr_asprintf(&err_msg, - "epoll_ctl (epoll_fd: %d) add wakeup fd: %d failed with " - "error: %d (%s)", - pi->epoll_fd, GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), errno, - strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } -} - -/* The caller is expected to hold pi->mu lock before calling this function */ -static void polling_island_remove_all_fds_locked(polling_island *pi, - bool remove_fd_refs, - grpc_error **error) { - int err; - size_t i; - char *err_msg; - const char *err_desc = "polling_island_remove_fds"; - - for (i = 0; i < pi->fd_cnt; i++) { - err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, pi->fds[i]->fd, NULL); - if (err < 0 && errno != ENOENT) { - gpr_asprintf(&err_msg, - "epoll_ctl (epoll_fd: %d) delete fds[%zu]: %d failed with " - "error: %d (%s)", - pi->epoll_fd, i, pi->fds[i]->fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } - - if (remove_fd_refs) { - GRPC_FD_UNREF(pi->fds[i], "polling_island"); - } - } - - pi->fd_cnt = 0; -} - -/* The caller is expected to hold pi->mu lock before calling this function */ -static void polling_island_remove_fd_locked(polling_island *pi, grpc_fd *fd, - bool is_fd_closed, - grpc_error **error) { - int err; - size_t i; - char *err_msg; - const char *err_desc = "polling_island_remove_fd"; - - /* If fd is already closed, then it would have been automatically been removed - from the epoll set */ - if (!is_fd_closed) { - err = epoll_ctl(pi->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL); - if (err < 0 && errno != ENOENT) { - gpr_asprintf( - &err_msg, - "epoll_ctl (epoll_fd: %d) del fd: %d failed with error: %d (%s)", - pi->epoll_fd, fd->fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } - } - - for (i = 0; i < pi->fd_cnt; i++) { - if (pi->fds[i] == fd) { - pi->fds[i] = pi->fds[--pi->fd_cnt]; - GRPC_FD_UNREF(fd, "polling_island"); - break; - } - } -} - -/* Might return NULL in case of an error */ -static polling_island *polling_island_create(grpc_exec_ctx *exec_ctx, - grpc_fd *initial_fd, - grpc_error **error) { - polling_island *pi = NULL; - const char *err_desc = "polling_island_create"; - - *error = GRPC_ERROR_NONE; - - pi = gpr_malloc(sizeof(*pi)); - gpr_mu_init(&pi->mu); - pi->fd_cnt = 0; - pi->fd_capacity = 0; - pi->fds = NULL; - pi->epoll_fd = -1; - - gpr_atm_rel_store(&pi->ref_count, 0); - gpr_atm_rel_store(&pi->poller_count, 0); - gpr_atm_rel_store(&pi->merged_to, (gpr_atm)NULL); - - gpr_mu_init(&pi->worker_list_mu); - worker_node_init(&pi->worker_list_head); - - pi->epoll_fd = epoll_create1(EPOLL_CLOEXEC); - - if (pi->epoll_fd < 0) { - append_error(error, GRPC_OS_ERROR(errno, "epoll_create1"), err_desc); - goto done; - } - - if (initial_fd != NULL) { - polling_island_add_fds_locked(pi, &initial_fd, 1, true, error); - } - -done: - if (*error != GRPC_ERROR_NONE) { - polling_island_delete(exec_ctx, pi); - pi = NULL; - } - return pi; -} - -static void polling_island_delete(grpc_exec_ctx *exec_ctx, polling_island *pi) { - GPR_ASSERT(pi->fd_cnt == 0); - - if (pi->epoll_fd >= 0) { - close(pi->epoll_fd); - } - gpr_mu_destroy(&pi->mu); - gpr_mu_destroy(&pi->worker_list_mu); - GPR_ASSERT(is_worker_node_detached(&pi->worker_list_head)); - - gpr_free(pi->fds); - gpr_free(pi); -} - -/* Attempts to gets the last polling island in the linked list (liked by the - * 'merged_to' field). Since this does not lock the polling island, there are no - * guarantees that the island returned is the last island */ -static polling_island *polling_island_maybe_get_latest(polling_island *pi) { - polling_island *next = (polling_island *)gpr_atm_acq_load(&pi->merged_to); - while (next != NULL) { - pi = next; - next = (polling_island *)gpr_atm_acq_load(&pi->merged_to); - } - - return pi; -} - -/* Gets the lock on the *latest* polling island i.e the last polling island in - the linked list (linked by the 'merged_to' field). Call gpr_mu_unlock on the - returned polling island's mu. - Usage: To lock/unlock polling island "pi", do the following: - polling_island *pi_latest = polling_island_lock(pi); - ... - ... critical section .. - ... - gpr_mu_unlock(&pi_latest->mu); // NOTE: use pi_latest->mu. NOT pi->mu */ -static polling_island *polling_island_lock(polling_island *pi) { - polling_island *next = NULL; - - while (true) { - next = (polling_island *)gpr_atm_acq_load(&pi->merged_to); - if (next == NULL) { - /* Looks like 'pi' is the last node in the linked list but unless we check - this by holding the pi->mu lock, we cannot be sure (i.e without the - pi->mu lock, we don't prevent island merges). - To be absolutely sure, check once more by holding the pi->mu lock */ - gpr_mu_lock(&pi->mu); - next = (polling_island *)gpr_atm_acq_load(&pi->merged_to); - if (next == NULL) { - /* pi is infact the last node and we have the pi->mu lock. we're done */ - break; - } - - /* pi->merged_to is not NULL i.e pi isn't the last node anymore. pi->mu - * isn't the lock we are interested in. Continue traversing the list */ - gpr_mu_unlock(&pi->mu); - } - - pi = next; - } - - return pi; -} - -/* Gets the lock on the *latest* polling islands in the linked lists pointed by - *p and *q (and also updates *p and *q to point to the latest polling islands) - - This function is needed because calling the following block of code to obtain - locks on polling islands (*p and *q) is prone to deadlocks. - { - polling_island_lock(*p, true); - polling_island_lock(*q, true); - } - - Usage/example: - polling_island *p1; - polling_island *p2; - .. - polling_island_lock_pair(&p1, &p2); - .. - .. Critical section with both p1 and p2 locked - .. - // Release locks: Always call polling_island_unlock_pair() to release locks - polling_island_unlock_pair(p1, p2); -*/ -static void polling_island_lock_pair(polling_island **p, polling_island **q) { - polling_island *pi_1 = *p; - polling_island *pi_2 = *q; - polling_island *next_1 = NULL; - polling_island *next_2 = NULL; - - /* The algorithm is simple: - - Go to the last polling islands in the linked lists *pi_1 and *pi_2 (and - keep updating pi_1 and pi_2) - - Then obtain locks on the islands by following a lock order rule of - locking polling_island with lower address first - Special case: Before obtaining the locks, check if pi_1 and pi_2 are - pointing to the same island. If that is the case, we can just call - polling_island_lock() - - After obtaining both the locks, double check that the polling islands - are still the last polling islands in their respective linked lists - (this is because there might have been polling island merges before - we got the lock) - - If the polling islands are the last islands, we are done. If not, - release the locks and continue the process from the first step */ - while (true) { - next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to); - while (next_1 != NULL) { - pi_1 = next_1; - next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to); - } - - next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to); - while (next_2 != NULL) { - pi_2 = next_2; - next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to); - } - - if (pi_1 == pi_2) { - pi_1 = pi_2 = polling_island_lock(pi_1); - break; - } - - if (pi_1 < pi_2) { - gpr_mu_lock(&pi_1->mu); - gpr_mu_lock(&pi_2->mu); - } else { - gpr_mu_lock(&pi_2->mu); - gpr_mu_lock(&pi_1->mu); - } - - next_1 = (polling_island *)gpr_atm_acq_load(&pi_1->merged_to); - next_2 = (polling_island *)gpr_atm_acq_load(&pi_2->merged_to); - if (next_1 == NULL && next_2 == NULL) { - break; - } - - gpr_mu_unlock(&pi_1->mu); - gpr_mu_unlock(&pi_2->mu); - } - - *p = pi_1; - *q = pi_2; -} - -static void polling_island_unlock_pair(polling_island *p, polling_island *q) { - if (p == q) { - gpr_mu_unlock(&p->mu); - } else { - gpr_mu_unlock(&p->mu); - gpr_mu_unlock(&q->mu); - } -} - -static polling_island *polling_island_merge(polling_island *p, - polling_island *q, - grpc_error **error) { - /* Get locks on both the polling islands */ - polling_island_lock_pair(&p, &q); - - if (p != q) { - /* Make sure that p points to the polling island with fewer fds than q */ - if (p->fd_cnt > q->fd_cnt) { - GPR_SWAP(polling_island *, p, q); - } - - /* Merge p with q i.e move all the fds from p (The one with fewer fds) to q - Note that the refcounts on the fds being moved will not change here. - This is why the last param in the following two functions is 'false') */ - polling_island_add_fds_locked(q, p->fds, p->fd_cnt, false, error); - polling_island_remove_all_fds_locked(p, false, error); - - /* Wakeup all the pollers (if any) on p so that they pickup this change */ - polling_island_add_wakeup_fd_locked(p, &polling_island_wakeup_fd, error); - - /* Add the 'merged_to' link from p --> q */ - gpr_atm_rel_store(&p->merged_to, (gpr_atm)q); - PI_ADD_REF(q, "pi_merge"); /* To account for the new incoming ref from p */ - } - /* else if p == q, nothing needs to be done */ - - polling_island_unlock_pair(p, q); - - /* Return the merged polling island (Note that no merge would have happened - if p == q which is ok) */ - return q; -} - -static grpc_error *polling_island_global_init() { - grpc_error *error = GRPC_ERROR_NONE; - - error = grpc_wakeup_fd_init(&polling_island_wakeup_fd); - if (error == GRPC_ERROR_NONE) { - error = grpc_wakeup_fd_wakeup(&polling_island_wakeup_fd); - } - - return error; -} - -static void polling_island_global_shutdown() { - grpc_wakeup_fd_destroy(&polling_island_wakeup_fd); -} - -/******************************************************************************* - * Fd Definitions - */ - -/* 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. - */ - -/* 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. */ - -static grpc_fd *fd_freelist = NULL; -static gpr_mu fd_freelist_mu; - -#ifndef NDEBUG -#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) { - if (GRPC_TRACER_ON(grpc_trace_fd_refcount)) { - gpr_log(GPR_DEBUG, - "FD %d %p ref %d %" PRIdPTR " -> %" PRIdPTR " [%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); -} - -#ifndef NDEBUG -static void unref_by(grpc_fd *fd, int n, const char *reason, const char *file, - int line) { - if (GRPC_TRACER_ON(grpc_trace_fd_refcount)) { - gpr_log(GPR_DEBUG, - "FD %d %p unref %d %" PRIdPTR " -> %" PRIdPTR " [%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) { -#endif - gpr_atm old = gpr_atm_full_fetch_add(&fd->refst, -n); - if (old == n) { - /* Add the fd to the freelist */ - gpr_mu_lock(&fd_freelist_mu); - fd->freelist_next = fd_freelist; - fd_freelist = fd; - grpc_iomgr_unregister_object(&fd->iomgr_object); - - grpc_lfev_destroy(&fd->read_closure); - grpc_lfev_destroy(&fd->write_closure); - - gpr_mu_unlock(&fd_freelist_mu); - } else { - GPR_ASSERT(old > n); - } -} - -/* Increment refcount by two to avoid changing the orphan bit */ -#ifndef NDEBUG -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 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; - gpr_mu_destroy(&fd->po.mu); - gpr_free(fd); - } - gpr_mu_destroy(&fd_freelist_mu); -} - -static grpc_fd *fd_create(int fd, const char *name) { - grpc_fd *new_fd = NULL; - - gpr_mu_lock(&fd_freelist_mu); - if (fd_freelist != NULL) { - new_fd = fd_freelist; - fd_freelist = fd_freelist->freelist_next; - } - gpr_mu_unlock(&fd_freelist_mu); - - if (new_fd == NULL) { - new_fd = gpr_malloc(sizeof(grpc_fd)); - gpr_mu_init(&new_fd->po.mu); - } - - /* Note: It is not really needed to get the new_fd->po.mu lock here. If this - * is a newly created fd (or an fd we got from the freelist), no one else - * would be holding a lock to it anyway. */ - gpr_mu_lock(&new_fd->po.mu); - new_fd->po.pi = NULL; -#ifndef NDEBUG - new_fd->po.obj_type = POLL_OBJ_FD; -#endif - - gpr_atm_rel_store(&new_fd->refst, (gpr_atm)1); - new_fd->fd = fd; - new_fd->orphaned = false; - grpc_lfev_init(&new_fd->read_closure); - grpc_lfev_init(&new_fd->write_closure); - gpr_atm_no_barrier_store(&new_fd->read_notifier_pollset, (gpr_atm)NULL); - - new_fd->freelist_next = NULL; - new_fd->on_done_closure = NULL; - - gpr_mu_unlock(&new_fd->po.mu); - - char *fd_name; - gpr_asprintf(&fd_name, "%s fd=%d", name, fd); - grpc_iomgr_register_object(&new_fd->iomgr_object, fd_name); -#ifndef NDEBUG - if (GRPC_TRACER_ON(grpc_trace_fd_refcount)) { - gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, new_fd, fd_name); - } -#endif - gpr_free(fd_name); - return new_fd; -} - -static int fd_wrapped_fd(grpc_fd *fd) { - int ret_fd = -1; - gpr_mu_lock(&fd->po.mu); - if (!fd->orphaned) { - ret_fd = fd->fd; - } - gpr_mu_unlock(&fd->po.mu); - - return ret_fd; -} - -static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_closure *on_done, int *release_fd, - bool already_closed, const char *reason) { - grpc_error *error = GRPC_ERROR_NONE; - polling_island *unref_pi = NULL; - - gpr_mu_lock(&fd->po.mu); - fd->on_done_closure = on_done; - - /* Remove the active status but keep referenced. We want this grpc_fd struct - to be alive (and not added to freelist) until the end of this function */ - REF_BY(fd, 1, reason); - - /* Remove the fd from the polling island: - - Get a lock on the latest polling island (i.e the last island in the - linked list pointed by fd->po.pi). This is the island that - would actually contain the fd - - Remove the fd from the latest polling island - - Unlock the latest polling island - - Set fd->po.pi to NULL (but remove the ref on the polling island - before doing this.) */ - if (fd->po.pi != NULL) { - polling_island *pi_latest = polling_island_lock(fd->po.pi); - polling_island_remove_fd_locked(pi_latest, fd, already_closed, &error); - gpr_mu_unlock(&pi_latest->mu); - - unref_pi = fd->po.pi; - fd->po.pi = NULL; - } - - /* If release_fd is not NULL, we should be relinquishing control of the file - descriptor fd->fd (but we still own the grpc_fd structure). */ - if (release_fd != NULL) { - *release_fd = fd->fd; - } else { - close(fd->fd); - } - - fd->orphaned = true; - - GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error)); - - gpr_mu_unlock(&fd->po.mu); - UNREF_BY(fd, 2, reason); /* Drop the reference */ - if (unref_pi != NULL) { - /* Unref stale polling island here, outside the fd lock above. - The polling island owns a workqueue which owns an fd, and unreffing - inside the lock can cause an eventual lock loop that makes TSAN very - unhappy. */ - PI_UNREF(exec_ctx, unref_pi, "fd_orphan"); - } - GRPC_LOG_IF_ERROR("fd_orphan", GRPC_ERROR_REF(error)); - GRPC_ERROR_UNREF(error); -} - -static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx, - grpc_fd *fd) { - gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset); - return (grpc_pollset *)notifier; -} - -static bool fd_is_shutdown(grpc_fd *fd) { - return grpc_lfev_is_shutdown(&fd->read_closure); -} - -/* Might be called multiple times */ -static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_error *why) { - if (grpc_lfev_set_shutdown(exec_ctx, &fd->read_closure, - GRPC_ERROR_REF(why))) { - shutdown(fd->fd, SHUT_RDWR); - grpc_lfev_set_shutdown(exec_ctx, &fd->write_closure, GRPC_ERROR_REF(why)); - } - GRPC_ERROR_UNREF(why); -} - -static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_closure *closure) { - grpc_lfev_notify_on(exec_ctx, &fd->read_closure, closure, "read"); -} - -static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_closure *closure) { - grpc_lfev_notify_on(exec_ctx, &fd->write_closure, closure, "write"); -} - -/******************************************************************************* - * Pollset Definitions - */ -GPR_TLS_DECL(g_current_thread_pollset); -GPR_TLS_DECL(g_current_thread_worker); -static __thread bool g_initialized_sigmask; -static __thread sigset_t g_orig_sigmask; -static __thread sigset_t g_wakeup_sig_set; - -static void sig_handler(int sig_num) { -#ifdef GRPC_EPOLL_DEBUG - gpr_log(GPR_INFO, "Received signal %d", sig_num); -#endif -} - -static void pollset_worker_init(grpc_pollset_worker *worker) { - worker->pt_id = pthread_self(); - worker->next = worker->prev = NULL; - gpr_atm_no_barrier_store(&worker->is_kicked, (gpr_atm)0); - gpr_atm_no_barrier_store(&worker->is_polling_turn, (gpr_atm)0); - worker_node_init(&worker->pi_list_link); -} - -static void poller_kick_init() { signal(grpc_wakeup_signal, sig_handler); } - -/* Global state management */ -static grpc_error *pollset_global_init(void) { - gpr_tls_init(&g_current_thread_pollset); - gpr_tls_init(&g_current_thread_worker); - poller_kick_init(); - return GRPC_ERROR_NONE; -} - -static void pollset_global_shutdown(void) { - gpr_tls_destroy(&g_current_thread_pollset); - gpr_tls_destroy(&g_current_thread_worker); -} - -static grpc_error *worker_kick(grpc_pollset_worker *worker, - gpr_atm *is_kicked) { - grpc_error *err = GRPC_ERROR_NONE; - - /* Kick the worker only if it was not already kicked */ - if (gpr_atm_no_barrier_cas(is_kicked, (gpr_atm)0, (gpr_atm)1)) { - GRPC_POLLING_TRACE( - "pollset_worker_kick: Kicking worker: %p (thread id: %ld)", - (void *)worker, (long int)worker->pt_id); - int err_num = pthread_kill(worker->pt_id, grpc_wakeup_signal); - if (err_num != 0) { - err = GRPC_OS_ERROR(err_num, "pthread_kill"); - } - } - return err; -} - -static grpc_error *pollset_worker_kick(grpc_pollset_worker *worker) { - return worker_kick(worker, &worker->is_kicked); -} - -static grpc_error *poller_kick(grpc_pollset_worker *worker) { - return worker_kick(worker, &worker->is_polling_turn); -} - -/* Return 1 if the pollset has active threads in pollset_work (pollset must - * be locked) */ -static int pollset_has_workers(grpc_pollset *p) { - return p->root_worker.next != &p->root_worker; -} - -static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) { - worker->prev->next = worker->next; - worker->next->prev = worker->prev; -} - -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; -} - -/* p->mu must be held before calling this function */ -static grpc_error *pollset_kick(grpc_pollset *p, - grpc_pollset_worker *specific_worker) { - GPR_TIMER_BEGIN("pollset_kick", 0); - grpc_error *error = GRPC_ERROR_NONE; - const char *err_desc = "Kick Failure"; - grpc_pollset_worker *worker = specific_worker; - if (worker != NULL) { - if (worker == GRPC_POLLSET_KICK_BROADCAST) { - if (pollset_has_workers(p)) { - GPR_TIMER_BEGIN("pollset_kick.broadcast", 0); - for (worker = p->root_worker.next; worker != &p->root_worker; - worker = worker->next) { - if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) { - append_error(&error, pollset_worker_kick(worker), err_desc); - } - } - GPR_TIMER_END("pollset_kick.broadcast", 0); - } else { - p->kicked_without_pollers = true; - } - } else { - GPR_TIMER_MARK("kicked_specifically", 0); - if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) { - append_error(&error, pollset_worker_kick(worker), err_desc); - } - } - } else if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)p) { - /* Since worker == NULL, it means that we can kick "any" worker on this - pollset 'p'. If 'p' happens to be the same pollset this thread is - currently polling (i.e in pollset_work() function), then there is no need - to kick any other worker since the current thread can just absorb the - kick. This is the reason why we enter this case only when - g_current_thread_pollset is != p */ - - GPR_TIMER_MARK("kick_anonymous", 0); - worker = pop_front_worker(p); - if (worker != NULL) { - GPR_TIMER_MARK("finally_kick", 0); - push_back_worker(p, worker); - append_error(&error, pollset_worker_kick(worker), err_desc); - } else { - GPR_TIMER_MARK("kicked_no_pollers", 0); - p->kicked_without_pollers = true; - } - } - - GPR_TIMER_END("pollset_kick", 0); - GRPC_LOG_IF_ERROR("pollset_kick", GRPC_ERROR_REF(error)); - return error; -} - -static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) { - gpr_mu_init(&pollset->po.mu); - *mu = &pollset->po.mu; - pollset->po.pi = NULL; -#ifndef NDEBUG - pollset->po.obj_type = POLL_OBJ_POLLSET; -#endif - - pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker; - pollset->kicked_without_pollers = false; - - pollset->shutting_down = false; - pollset->finish_shutdown_called = false; - pollset->shutdown_done = NULL; -} - -/* Convert millis to timespec (clock-type is assumed to be GPR_TIMESPAN) */ -static struct timespec millis_to_timespec(int millis) { - struct timespec linux_ts; - gpr_timespec gpr_ts; - - if (millis == -1) { - gpr_ts = gpr_inf_future(GPR_TIMESPAN); - } else { - gpr_ts = gpr_time_from_millis(millis, GPR_TIMESPAN); - } - - linux_ts.tv_sec = (time_t)gpr_ts.tv_sec; - linux_ts.tv_nsec = gpr_ts.tv_nsec; - return linux_ts; -} - -/* 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) { - 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); - int millis = gpr_time_to_millis(gpr_time_add( - timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN))); - return millis >= 1 ? millis : 1; -} - -static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_pollset *notifier) { - grpc_lfev_set_ready(exec_ctx, &fd->read_closure, "read"); - - /* Note, it is possible that fd_become_readable might be called twice with - different 'notifier's when an fd becomes readable and it is in two epoll - sets (This can happen briefly during polling island merges). In such cases - it does not really matter which notifer is set as the read_notifier_pollset - (They would both point to the same polling island anyway) */ - /* Use release store to match with acquire load in fd_get_read_notifier */ - gpr_atm_rel_store(&fd->read_notifier_pollset, (gpr_atm)notifier); -} - -static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) { - grpc_lfev_set_ready(exec_ctx, &fd->write_closure, "write"); -} - -static void pollset_release_polling_island(grpc_exec_ctx *exec_ctx, - grpc_pollset *ps, char *reason) { - if (ps->po.pi != NULL) { - PI_UNREF(exec_ctx, ps->po.pi, reason); - } - ps->po.pi = NULL; -} - -static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx, - grpc_pollset *pollset) { - /* The pollset cannot have any workers if we are at this stage */ - GPR_ASSERT(!pollset_has_workers(pollset)); - - pollset->finish_shutdown_called = true; - - /* Release the ref and set pollset->po.pi to NULL */ - pollset_release_polling_island(exec_ctx, pollset, "ps_shutdown"); - GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE); -} - -/* pollset->po.mu lock must be held by the caller before calling this */ -static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, - grpc_closure *closure) { - GPR_TIMER_BEGIN("pollset_shutdown", 0); - GPR_ASSERT(!pollset->shutting_down); - pollset->shutting_down = true; - pollset->shutdown_done = closure; - pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST); - - /* If the pollset has any workers, we cannot call finish_shutdown_locked() - because it would release the underlying polling island. In such a case, we - let the last worker call finish_shutdown_locked() from pollset_work() */ - if (!pollset_has_workers(pollset)) { - GPR_ASSERT(!pollset->finish_shutdown_called); - GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0); - finish_shutdown_locked(exec_ctx, pollset); - } - GPR_TIMER_END("pollset_shutdown", 0); -} - -/* pollset_shutdown is guaranteed to be called before pollset_destroy. So other - * than destroying the mutexes, there is nothing special that needs to be done - * here */ -static void pollset_destroy(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) { - GPR_ASSERT(!pollset_has_workers(pollset)); - gpr_mu_destroy(&pollset->po.mu); -} - -/* NOTE: This function may modify 'now' */ -static bool acquire_polling_lease(grpc_exec_ctx *exec_ctx, - grpc_pollset_worker *worker, - polling_island *pi, gpr_timespec deadline, - gpr_timespec *now) { - bool is_lease_acquired = false; - - gpr_mu_lock(&pi->worker_list_mu); // LOCK - long num_pollers = gpr_atm_no_barrier_load(&pi->poller_count); - - if (num_pollers >= g_max_pollers_per_pi) { - push_back_worker_node(&pi->worker_list_head, &worker->pi_list_link); - gpr_mu_unlock(&pi->worker_list_mu); // UNLOCK - - bool is_timeout = false; - int ret; - int timeout_ms = poll_deadline_to_millis_timeout(deadline, *now); - if (timeout_ms == -1) { - ret = sigwaitinfo(&g_wakeup_sig_set, NULL); - } else { - struct timespec sigwait_timeout = millis_to_timespec(timeout_ms); - GRPC_SCHEDULING_START_BLOCKING_REGION; - GRPC_STATS_INC_SYSCALL_WAIT(exec_ctx); - ret = sigtimedwait(&g_wakeup_sig_set, NULL, &sigwait_timeout); - GRPC_SCHEDULING_END_BLOCKING_REGION; - } - - if (ret == -1) { - if (errno == EAGAIN) { - is_timeout = true; - } else { - /* NOTE: This should not happen. If we see these log messages, it means - we are most likely doing something incorrect in the setup * needed - for sigwaitinfo/sigtimedwait */ - gpr_log(GPR_ERROR, - "sigtimedwait failed with retcode: %d (timeout_ms: %d)", errno, - timeout_ms); - } - } - - /* Did the worker come out of sigtimedwait due to a thread that just - exited epoll and kicking it (in release_polling_lease function). */ - bool is_polling_turn = gpr_atm_acq_load(&worker->is_polling_turn); - - /* Did the worker come out of sigtimedwait due to a thread alerting it that - some completion event was (likely) available in the completion queue */ - bool is_kicked = gpr_atm_no_barrier_load(&worker->is_kicked); - - if (is_kicked || is_timeout) { - *now = deadline; /* Essentially make the epoll timeout = 0 */ - } else if (is_polling_turn) { - *now = gpr_now(GPR_CLOCK_MONOTONIC); /* Reduce the epoll timeout */ - } - - gpr_mu_lock(&pi->worker_list_mu); // LOCK - /* The node might have already been removed from the list by the poller - that kicked this. However it is safe to call 'remove_worker_node' on - an already detached node */ - remove_worker_node(&worker->pi_list_link); - /* It is important to read the num_pollers again under the lock so that we - * have the latest num_pollers value that doesn't change while we are doing - * the "(num_pollers < g_max_pollers_per_pi)" a a few lines below */ - num_pollers = gpr_atm_no_barrier_load(&pi->poller_count); - } - - if (num_pollers < g_max_pollers_per_pi) { - gpr_atm_no_barrier_fetch_add(&pi->poller_count, 1); - is_lease_acquired = true; - } - - gpr_mu_unlock(&pi->worker_list_mu); // UNLOCK - return is_lease_acquired; -} - -static void release_polling_lease(polling_island *pi, grpc_error **error) { - gpr_mu_lock(&pi->worker_list_mu); - - gpr_atm_no_barrier_fetch_add(&pi->poller_count, -1); - worker_node *node = pop_front_worker_node(&pi->worker_list_head); - if (node != NULL) { - grpc_pollset_worker *next_worker = WORKER_FROM_WORKER_LIST_NODE(node); - append_error(error, poller_kick(next_worker), "poller kick error"); - } - - gpr_mu_unlock(&pi->worker_list_mu); -} - -#define GRPC_EPOLL_MAX_EVENTS 100 -static void pollset_do_epoll_pwait(grpc_exec_ctx *exec_ctx, int epoll_fd, - grpc_pollset *pollset, polling_island *pi, - grpc_pollset_worker *worker, - gpr_timespec now, gpr_timespec deadline, - sigset_t *sig_mask, grpc_error **error) { - /* Only g_max_pollers_per_pi threads can be doing polling in parallel. - If we cannot get a lease, we cannot continue to do epoll_pwait() */ - if (!acquire_polling_lease(exec_ctx, worker, pi, deadline, &now)) { - return; - } - - struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS]; - int ep_rv; - char *err_msg; - const char *err_desc = "pollset_work_and_unlock"; - - /* timeout_ms is the time between 'now' and 'deadline' */ - int timeout_ms = poll_deadline_to_millis_timeout(deadline, now); - - GRPC_SCHEDULING_START_BLOCKING_REGION; - GRPC_STATS_INC_SYSCALL_POLL(exec_ctx); - ep_rv = - epoll_pwait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms, sig_mask); - GRPC_SCHEDULING_END_BLOCKING_REGION; - - /* Give back the lease right away so that some other thread can enter */ - release_polling_lease(pi, error); - - if (ep_rv < 0) { - if (errno != EINTR) { - gpr_asprintf(&err_msg, - "epoll_wait() epoll fd: %d failed with error: %d (%s)", - epoll_fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - } else { - /* We were interrupted. Save an interation by doing a zero timeout - epoll_wait to see if there are any other events of interest */ - GRPC_POLLING_TRACE("pollset_work: pollset: %p, worker: %p received kick", - (void *)pollset, (void *)worker); - ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, 0); - } - } - -#ifdef GRPC_TSAN - /* See the definition of g_poll_sync for more details */ - gpr_atm_acq_load(&g_epoll_sync); -#endif /* defined(GRPC_TSAN) */ - - for (int i = 0; i < ep_rv; ++i) { - void *data_ptr = ep_ev[i].data.ptr; - if (data_ptr == &polling_island_wakeup_fd) { - GRPC_POLLING_TRACE( - "pollset_work: pollset: %p, worker: %p polling island (epoll_fd: " - "%d) got merged", - (void *)pollset, (void *)worker, epoll_fd); - /* This means that our polling island is merged with a different - island. We do not have to do anything here since the subsequent call - to the function pollset_work_and_unlock() will pick up the correct - epoll_fd */ - } else { - grpc_fd *fd = data_ptr; - 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 (read_ev || cancel) { - fd_become_readable(exec_ctx, fd, pollset); - } - if (write_ev || cancel) { - fd_become_writable(exec_ctx, fd); - } - } - } -} - -/* Note: sig_mask contains the signal mask to use *during* epoll_wait() */ -static void pollset_work_and_unlock(grpc_exec_ctx *exec_ctx, - grpc_pollset *pollset, - grpc_pollset_worker *worker, - gpr_timespec now, gpr_timespec deadline, - sigset_t *sig_mask, grpc_error **error) { - int epoll_fd = -1; - polling_island *pi = NULL; - GPR_TIMER_BEGIN("pollset_work_and_unlock", 0); - - /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the - latest polling island pointed by pollset->po.pi - - Since epoll_fd is immutable, it is safe to read it without a lock on the - polling island. There is however a possibility that the polling island from - which we got the epoll_fd, got merged with another island in the meantime. - This is okay because in such a case, we will wakeup right-away from - epoll_pwait() (because any merge will poison the old polling island's epoll - set 'polling_island_wakeup_fd') and then pick up the latest polling_island - the next time this function - pollset_work_and_unlock()) is called */ - - if (pollset->po.pi == NULL) { - pollset->po.pi = polling_island_create(exec_ctx, NULL, error); - if (pollset->po.pi == NULL) { - GPR_TIMER_END("pollset_work_and_unlock", 0); - return; /* Fatal error. Cannot continue */ - } - - PI_ADD_REF(pollset->po.pi, "ps"); - GRPC_POLLING_TRACE("pollset_work: pollset: %p created new pi: %p", - (void *)pollset, (void *)pollset->po.pi); - } - - pi = polling_island_maybe_get_latest(pollset->po.pi); - epoll_fd = pi->epoll_fd; - - /* Update the pollset->po.pi since the island being pointed by - pollset->po.pi maybe older than the one pointed by pi) */ - if (pollset->po.pi != pi) { - /* Always do PI_ADD_REF before PI_UNREF because PI_UNREF may cause the - polling island to be deleted */ - PI_ADD_REF(pi, "ps"); - PI_UNREF(exec_ctx, pollset->po.pi, "ps"); - pollset->po.pi = pi; - } - - /* Add an extra ref so that the island does not get destroyed (which means - the epoll_fd won't be closed) while we are are doing an epoll_wait() on the - epoll_fd */ - PI_ADD_REF(pi, "ps_work"); - gpr_mu_unlock(&pollset->po.mu); - - g_current_thread_polling_island = pi; - pollset_do_epoll_pwait(exec_ctx, epoll_fd, pollset, pi, worker, now, deadline, - sig_mask, error); - g_current_thread_polling_island = NULL; - - GPR_ASSERT(pi != NULL); - - /* Before leaving, release the extra ref we added to the polling island. It - is important to use "pi" here (i.e our old copy of pollset->po.pi - that we got before releasing the polling island lock). This is because - pollset->po.pi pointer might get udpated in other parts of the - code when there is an island merge while we are doing epoll_wait() above */ - PI_UNREF(exec_ctx, pi, "ps_work"); - - GPR_TIMER_END("pollset_work_and_unlock", 0); -} - -/* pollset->po.mu lock must be held by the caller before calling this. - The function pollset_work() may temporarily release the lock (pollset->po.mu) - during the course of its execution but it will always re-acquire the lock and - ensure that it is held by the time the function returns */ -static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, - grpc_pollset_worker **worker_hdl, - gpr_timespec now, gpr_timespec deadline) { - GPR_TIMER_BEGIN("pollset_work", 0); - grpc_error *error = GRPC_ERROR_NONE; - - grpc_pollset_worker worker; - pollset_worker_init(&worker); - - if (worker_hdl) *worker_hdl = &worker; - - gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset); - gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker); - - if (pollset->kicked_without_pollers) { - /* If the pollset was kicked without pollers, pretend that the current - worker got the kick and skip polling. A kick indicates that there is some - work that needs attention like an event on the completion queue or an - alarm */ - GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0); - pollset->kicked_without_pollers = 0; - } else if (!pollset->shutting_down) { - /* We use the posix-signal with number 'grpc_wakeup_signal' for waking up - (i.e 'kicking') a worker in the pollset. A 'kick' is a way to inform the - worker that there is some pending work that needs immediate attention - (like an event on the completion queue, or a polling island merge that - results in a new epoll-fd to wait on) and that the worker should not - spend time waiting in epoll_pwait(). - - A worker can be kicked anytime from the point it is added to the pollset - via push_front_worker() (or push_back_worker()) to the point it is - removed via remove_worker(). - If the worker is kicked before/during it calls epoll_pwait(), it should - immediately exit from epoll_wait(). If the worker is kicked after it - returns from epoll_wait(), then nothing really needs to be done. - - To accomplish this, we mask 'grpc_wakeup_signal' on this thread at all - times *except* when it is in epoll_pwait(). This way, the worker never - misses acting on a kick */ - - if (!g_initialized_sigmask) { - sigemptyset(&g_wakeup_sig_set); - sigaddset(&g_wakeup_sig_set, grpc_wakeup_signal); - pthread_sigmask(SIG_BLOCK, &g_wakeup_sig_set, &g_orig_sigmask); - sigdelset(&g_orig_sigmask, grpc_wakeup_signal); - g_initialized_sigmask = true; - /* new_mask: The new thread mask which blocks 'grpc_wakeup_signal'. - This is the mask used at all times *except during - epoll_wait()*" - g_orig_sigmask: The thread mask which allows 'grpc_wakeup_signal' and - this is the mask to use *during epoll_wait()* - - The new_mask is set on the worker before it is added to the pollset - (i.e before it can be kicked) */ - } - - push_front_worker(pollset, &worker); /* Add worker to pollset */ - - pollset_work_and_unlock(exec_ctx, pollset, &worker, now, deadline, - &g_orig_sigmask, &error); - grpc_exec_ctx_flush(exec_ctx); - - gpr_mu_lock(&pollset->po.mu); - - /* Note: There is no need to reset worker.is_kicked to 0 since we are no - longer going to use this worker */ - remove_worker(pollset, &worker); - } - - /* If we are the last worker on the pollset (i.e pollset_has_workers() is - false at this point) and the pollset is shutting down, we may have to - finish the shutdown process by calling finish_shutdown_locked(). - See pollset_shutdown() for more details. - - Note: Continuing to access pollset here is safe; it is the caller's - responsibility to not destroy a pollset when it has outstanding calls to - pollset_work() */ - if (pollset->shutting_down && !pollset_has_workers(pollset) && - !pollset->finish_shutdown_called) { - GPR_TIMER_MARK("pollset_work.finish_shutdown_locked", 0); - finish_shutdown_locked(exec_ctx, pollset); - - gpr_mu_unlock(&pollset->po.mu); - grpc_exec_ctx_flush(exec_ctx); - gpr_mu_lock(&pollset->po.mu); - } - - if (worker_hdl) *worker_hdl = NULL; - - gpr_tls_set(&g_current_thread_pollset, (intptr_t)0); - gpr_tls_set(&g_current_thread_worker, (intptr_t)0); - - GPR_TIMER_END("pollset_work", 0); - - GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error)); - return error; -} - -static void add_poll_object(grpc_exec_ctx *exec_ctx, poll_obj *bag, - poll_obj_type bag_type, poll_obj *item, - poll_obj_type item_type) { - GPR_TIMER_BEGIN("add_poll_object", 0); - -#ifndef NDEBUG - GPR_ASSERT(item->obj_type == item_type); - GPR_ASSERT(bag->obj_type == bag_type); -#endif - - grpc_error *error = GRPC_ERROR_NONE; - polling_island *pi_new = NULL; - - gpr_mu_lock(&bag->mu); - gpr_mu_lock(&item->mu); - -retry: - /* - * 1) If item->pi and bag->pi are both non-NULL and equal, do nothing - * 2) If item->pi and bag->pi are both NULL, create a new polling island (with - * a refcount of 2) and point item->pi and bag->pi to the new island - * 3) If exactly one of item->pi or bag->pi is NULL, update it to point to - * the other's non-NULL pi - * 4) Finally if item->pi and bag-pi are non-NULL and not-equal, merge the - * polling islands and update item->pi and bag->pi to point to the new - * island - */ - - /* Early out if we are trying to add an 'fd' to a 'bag' but the fd is already - * orphaned */ - if (item_type == POLL_OBJ_FD && (FD_FROM_PO(item))->orphaned) { - gpr_mu_unlock(&item->mu); - gpr_mu_unlock(&bag->mu); - return; - } - - if (item->pi == bag->pi) { - pi_new = item->pi; - if (pi_new == NULL) { - /* GPR_ASSERT(item->pi == bag->pi == NULL) */ - - /* If we are adding an fd to a bag (i.e pollset or pollset_set), then - * we need to do some extra work to make TSAN happy */ - if (item_type == POLL_OBJ_FD) { - /* Unlock before creating a new polling island: the polling island will - create a workqueue which creates a file descriptor, and holding an fd - lock here can eventually cause a loop to appear to TSAN (making it - unhappy). We don't think it's a real loop (there's an epoch point - where that loop possibility disappears), but the advantages of - keeping TSAN happy outweigh any performance advantage we might have - by keeping the lock held. */ - gpr_mu_unlock(&item->mu); - pi_new = polling_island_create(exec_ctx, FD_FROM_PO(item), &error); - gpr_mu_lock(&item->mu); - - /* Need to reverify any assumptions made between the initial lock and - getting to this branch: if they've changed, we need to throw away our - work and figure things out again. */ - if (item->pi != NULL) { - GRPC_POLLING_TRACE( - "add_poll_object: Raced creating new polling island. pi_new: %p " - "(fd: %d, %s: %p)", - (void *)pi_new, FD_FROM_PO(item)->fd, poll_obj_string(bag_type), - (void *)bag); - /* No need to lock 'pi_new' here since this is a new polling island - and no one has a reference to it yet */ - polling_island_remove_all_fds_locked(pi_new, true, &error); - - /* Ref and unref so that the polling island gets deleted during unref - */ - PI_ADD_REF(pi_new, "dance_of_destruction"); - PI_UNREF(exec_ctx, pi_new, "dance_of_destruction"); - goto retry; - } - } else { - pi_new = polling_island_create(exec_ctx, NULL, &error); - } - - GRPC_POLLING_TRACE( - "add_poll_object: Created new polling island. pi_new: %p (%s: %p, " - "%s: %p)", - (void *)pi_new, poll_obj_string(item_type), (void *)item, - poll_obj_string(bag_type), (void *)bag); - } else { - GRPC_POLLING_TRACE( - "add_poll_object: Same polling island. pi: %p (%s, %s)", - (void *)pi_new, poll_obj_string(item_type), - poll_obj_string(bag_type)); - } - } else if (item->pi == NULL) { - /* GPR_ASSERT(bag->pi != NULL) */ - /* Make pi_new point to latest pi*/ - pi_new = polling_island_lock(bag->pi); - - if (item_type == POLL_OBJ_FD) { - grpc_fd *fd = FD_FROM_PO(item); - polling_island_add_fds_locked(pi_new, &fd, 1, true, &error); - } - - gpr_mu_unlock(&pi_new->mu); - GRPC_POLLING_TRACE( - "add_poll_obj: item->pi was NULL. pi_new: %p (item(%s): %p, " - "bag(%s): %p)", - (void *)pi_new, poll_obj_string(item_type), (void *)item, - poll_obj_string(bag_type), (void *)bag); - } else if (bag->pi == NULL) { - /* GPR_ASSERT(item->pi != NULL) */ - /* Make pi_new to point to latest pi */ - pi_new = polling_island_lock(item->pi); - gpr_mu_unlock(&pi_new->mu); - GRPC_POLLING_TRACE( - "add_poll_obj: bag->pi was NULL. pi_new: %p (item(%s): %p, " - "bag(%s): %p)", - (void *)pi_new, poll_obj_string(item_type), (void *)item, - poll_obj_string(bag_type), (void *)bag); - } else { - pi_new = polling_island_merge(item->pi, bag->pi, &error); - GRPC_POLLING_TRACE( - "add_poll_obj: polling islands merged. pi_new: %p (item(%s): %p, " - "bag(%s): %p)", - (void *)pi_new, poll_obj_string(item_type), (void *)item, - poll_obj_string(bag_type), (void *)bag); - } - - /* At this point, pi_new is the polling island that both item->pi and bag->pi - MUST be pointing to */ - - if (item->pi != pi_new) { - PI_ADD_REF(pi_new, poll_obj_string(item_type)); - if (item->pi != NULL) { - PI_UNREF(exec_ctx, item->pi, poll_obj_string(item_type)); - } - item->pi = pi_new; - } - - if (bag->pi != pi_new) { - PI_ADD_REF(pi_new, poll_obj_string(bag_type)); - if (bag->pi != NULL) { - PI_UNREF(exec_ctx, bag->pi, poll_obj_string(bag_type)); - } - bag->pi = pi_new; - } - - gpr_mu_unlock(&item->mu); - gpr_mu_unlock(&bag->mu); - - GRPC_LOG_IF_ERROR("add_poll_object", error); - GPR_TIMER_END("add_poll_object", 0); -} - -static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, - grpc_fd *fd) { - add_poll_object(exec_ctx, &pollset->po, POLL_OBJ_POLLSET, &fd->po, - POLL_OBJ_FD); -} - -/******************************************************************************* - * Pollset-set Definitions - */ - -static grpc_pollset_set *pollset_set_create(void) { - grpc_pollset_set *pss = gpr_malloc(sizeof(*pss)); - gpr_mu_init(&pss->po.mu); - pss->po.pi = NULL; -#ifndef NDEBUG - pss->po.obj_type = POLL_OBJ_POLLSET_SET; -#endif - return pss; -} - -static void pollset_set_destroy(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *pss) { - gpr_mu_destroy(&pss->po.mu); - - if (pss->po.pi != NULL) { - PI_UNREF(exec_ctx, pss->po.pi, "pss_destroy"); - } - - gpr_free(pss); -} - -static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss, - grpc_fd *fd) { - add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &fd->po, - POLL_OBJ_FD); -} - -static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss, - grpc_fd *fd) { - /* Nothing to do */ -} - -static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *pss, grpc_pollset *ps) { - add_poll_object(exec_ctx, &pss->po, POLL_OBJ_POLLSET_SET, &ps->po, - POLL_OBJ_POLLSET); -} - -static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *pss, grpc_pollset *ps) { - /* Nothing to do */ -} - -static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *bag, - grpc_pollset_set *item) { - add_poll_object(exec_ctx, &bag->po, POLL_OBJ_POLLSET_SET, &item->po, - POLL_OBJ_POLLSET_SET); -} - -static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *bag, - grpc_pollset_set *item) { - /* Nothing to do */ -} - -/******************************************************************************* - * Event engine binding - */ - -static void shutdown_engine(void) { - fd_global_shutdown(); - pollset_global_shutdown(); - polling_island_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_is_shutdown = fd_is_shutdown, - .fd_notify_on_read = fd_notify_on_read, - .fd_notify_on_write = fd_notify_on_write, - .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset, - - .pollset_init = pollset_init, - .pollset_shutdown = pollset_shutdown, - .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, - - .shutdown_engine = shutdown_engine, -}; - -/* It is possible that GLIBC has epoll but the underlying kernel doesn't. - * Create a dummy epoll_fd to make sure epoll support is available */ -static bool is_epoll_available() { - int fd = epoll_create1(EPOLL_CLOEXEC); - if (fd < 0) { - gpr_log( - GPR_ERROR, - "epoll_create1 failed with error: %d. Not using epoll polling engine", - fd); - return false; - } - close(fd); - return true; -} - -/* This is mainly for testing purposes. Checks to see if environment variable - * GRPC_MAX_POLLERS_PER_PI is set and if so, assigns that value to - * g_max_pollers_per_pi (any negative value is considered INT_MAX) */ -static void set_max_pollers_per_island() { - char *s = gpr_getenv("GRPC_MAX_POLLERS_PER_PI"); - if (s) { - g_max_pollers_per_pi = (int)strtol(s, NULL, 10); - if (g_max_pollers_per_pi < 0) { - g_max_pollers_per_pi = INT_MAX; - } - } else { - g_max_pollers_per_pi = INT_MAX; - } - - gpr_log(GPR_INFO, "Max number of pollers per polling island: %d", - g_max_pollers_per_pi); -} - -const grpc_event_engine_vtable *grpc_init_epoll_limited_pollers_linux( - bool explicitly_requested) { - if (!explicitly_requested) { - return NULL; - } - - /* If use of signals is disabled, we cannot use epoll engine*/ - if (is_grpc_wakeup_signal_initialized && grpc_wakeup_signal < 0) { - return NULL; - } - - if (!grpc_has_wakeup_fd()) { - return NULL; - } - - if (!is_epoll_available()) { - return NULL; - } - - if (!is_grpc_wakeup_signal_initialized) { - grpc_use_signal(SIGRTMIN + 6); - } - - set_max_pollers_per_island(); - - fd_global_init(); - - if (!GRPC_LOG_IF_ERROR("pollset_global_init", pollset_global_init())) { - return NULL; - } - - if (!GRPC_LOG_IF_ERROR("polling_island_global_init", - polling_island_global_init())) { - return NULL; - } - - return &vtable; -} - -#else /* defined(GRPC_LINUX_EPOLL) */ -#if defined(GRPC_POSIX_SOCKET) -#include "src/core/lib/iomgr/ev_posix.h" -/* If GRPC_LINUX_EPOLL is not defined, it means epoll is not available. Return - * NULL */ -const grpc_event_engine_vtable *grpc_init_epoll_limited_pollers_linux( - bool explicitly_requested) { - return NULL; -} -#endif /* defined(GRPC_POSIX_SOCKET) */ -#endif /* !defined(GRPC_LINUX_EPOLL) */ diff --git a/src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h b/src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h deleted file mode 100644 index 1d6af5f52c..0000000000 --- a/src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * - * Copyright 2015 gRPC authors. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ - -#ifndef GRPC_CORE_LIB_IOMGR_EV_EPOLL_LIMITED_POLLERS_LINUX_H -#define GRPC_CORE_LIB_IOMGR_EV_EPOLL_LIMITED_POLLERS_LINUX_H - -#include "src/core/lib/iomgr/ev_posix.h" -#include "src/core/lib/iomgr/port.h" - -const grpc_event_engine_vtable *grpc_init_epoll_limited_pollers_linux( - bool explicitly_requested); - -#endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_LIMITED_POLLERS_LINUX_H */ diff --git a/src/core/lib/iomgr/ev_epoll_thread_pool_linux.c b/src/core/lib/iomgr/ev_epoll_thread_pool_linux.c deleted file mode 100644 index ddb8c74d2d..0000000000 --- a/src/core/lib/iomgr/ev_epoll_thread_pool_linux.c +++ /dev/null @@ -1,1184 +0,0 @@ -/* - * - * Copyright 2017 gRPC authors. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ - -#include "src/core/lib/iomgr/port.h" - -/* This polling engine is only relevant on linux kernels supporting epoll() */ -#ifdef GRPC_LINUX_EPOLL - -#include "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h" - -#include <assert.h> -#include <errno.h> -#include <limits.h> -#include <poll.h> -#include <pthread.h> -#include <string.h> -#include <sys/epoll.h> -#include <sys/socket.h> -#include <unistd.h> - -#include <grpc/support/alloc.h> -#include <grpc/support/cpu.h> -#include <grpc/support/log.h> -#include <grpc/support/string_util.h> -#include <grpc/support/thd.h> -#include <grpc/support/tls.h> -#include <grpc/support/useful.h> - -#include "src/core/lib/debug/stats.h" -#include "src/core/lib/iomgr/ev_posix.h" -#include "src/core/lib/iomgr/iomgr_internal.h" -#include "src/core/lib/iomgr/lockfree_event.h" -#include "src/core/lib/iomgr/timer.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" - -/* TODO: sreek - Move this to init.c and initialize this like other tracers. */ -#define GRPC_POLLING_TRACE(fmt, ...) \ - if (GRPC_TRACER_ON(grpc_polling_trace)) { \ - gpr_log(GPR_INFO, (fmt), __VA_ARGS__); \ - } - -/* 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. */ - -struct epoll_set; - -#define GRPC_POLLSET_KICK_BROADCAST ((grpc_pollset_worker *)1) - -/******************************************************************************* - * Fd Declarations - */ -struct grpc_fd { - gpr_mu mu; - struct epoll_set *eps; - - int fd; - - /* The fd is either closed or we relinquished control of it. In either cases, - this indicates that the 'fd' on this structure is no longer valid */ - bool orphaned; - - gpr_atm read_closure; - gpr_atm write_closure; - - struct grpc_fd *freelist_next; - grpc_closure *on_done_closure; - - grpc_iomgr_object iomgr_object; -}; - -static void fd_global_init(void); -static void fd_global_shutdown(void); - -/******************************************************************************* - * epoll set Declarations - */ - -#ifndef NDEBUG - -#define EPS_ADD_REF(p, r) eps_add_ref_dbg((p), (r), __FILE__, __LINE__) -#define EPS_UNREF(exec_ctx, p, r) \ - eps_unref_dbg((exec_ctx), (p), (r), __FILE__, __LINE__) - -#else - -#define EPS_ADD_REF(p, r) eps_add_ref((p)) -#define EPS_UNREF(exec_ctx, p, r) eps_unref((exec_ctx), (p)) - -#endif - -typedef struct epoll_set { - /* Mutex poller should acquire to poll this. This enforces that only one - * poller can be polling on epoll_set at any time */ - gpr_mu mu; - - /* Ref count. Use EPS_ADD_REF() and EPS_UNREF() macros to increment/decrement - the refcount. Once the ref count becomes zero, this structure is destroyed - which means we should ensure that there is never a scenario where a - EPS_ADD_REF() is racing with a EPS_UNREF() that just made the ref_count - zero. */ - gpr_atm ref_count; - - /* Number of threads currently polling on this epoll set*/ - gpr_atm poller_count; - - /* Is the epoll set shutdown */ - gpr_atm is_shutdown; - - /* The fd of the underlying epoll set */ - int epoll_fd; -} epoll_set; - -/******************************************************************************* - * Pollset Declarations - */ -struct grpc_pollset_worker { - gpr_cv kick_cv; - - struct grpc_pollset_worker *next; - struct grpc_pollset_worker *prev; -}; - -struct grpc_pollset { - gpr_mu mu; - struct epoll_set *eps; - - grpc_pollset_worker root_worker; - bool kicked_without_pollers; - - bool shutting_down; /* Is the pollset shutting down ? */ - bool finish_shutdown_called; /* Is the 'finish_shutdown_locked()' called ? */ - grpc_closure *shutdown_done; /* Called after after shutdown is complete */ -}; - -/******************************************************************************* - * Pollset-set Declarations - */ -struct grpc_pollset_set { - char unused; -}; - -/***************************************************************************** - * Dedicated polling threads and pollsets - Declarations - */ - -size_t g_num_eps = 1; -struct epoll_set **g_epoll_sets = NULL; -gpr_atm g_next_eps; -size_t g_num_threads_per_eps = 1; -gpr_thd_id *g_poller_threads = NULL; - -/* Used as read-notifier pollsets for fds. We won't be using read notifier - * pollsets with this polling engine. So it does not matter what pollset we - * return */ -grpc_pollset g_read_notifier; - -static void add_fd_to_eps(grpc_fd *fd); -static bool init_epoll_sets(); -static void shutdown_epoll_sets(); -static void poller_thread_loop(void *arg); -static void start_poller_threads(); -static void shutdown_poller_threads(); - -/******************************************************************************* - * Common helpers - */ - -static bool append_error(grpc_error **composite, grpc_error *error, - const char *desc) { - if (error == GRPC_ERROR_NONE) return true; - if (*composite == GRPC_ERROR_NONE) { - *composite = GRPC_ERROR_CREATE_FROM_COPIED_STRING(desc); - } - *composite = grpc_error_add_child(*composite, error); - return false; -} - -/******************************************************************************* - * epoll set Definitions - */ - -/* The wakeup fd that is used to wake up all threads in an epoll_set informing - that the epoll set is shutdown. This wakeup fd initialized to be readable - and MUST NOT be consumed i.e the threads that woke up MUST NOT call - grpc_wakeup_fd_consume_wakeup() */ -static grpc_wakeup_fd epoll_set_wakeup_fd; - -/* The epoll set being polled right now. - See comments in workqueue_maybe_wakeup for why this is tracked. */ -static __thread epoll_set *g_current_thread_epoll_set; - -/* Forward declaration */ -static void epoll_set_delete(epoll_set *eps); - -#ifdef GRPC_TSAN -/* Currently TSAN may incorrectly flag data races between epoll_ctl and - epoll_wait for any grpc_fd structs that are added to the epoll set via - epoll_ctl and are returned (within a very short window) via epoll_wait(). - - To work-around this race, we establish a happens-before relation between - the code just-before epoll_ctl() and the code after epoll_wait() by using - this atomic */ -gpr_atm g_epoll_sync; -#endif /* defined(GRPC_TSAN) */ - -static void eps_add_ref(epoll_set *eps); -static void eps_unref(grpc_exec_ctx *exec_ctx, epoll_set *eps); - -#ifndef NDEBUG -static void eps_add_ref_dbg(epoll_set *eps, const char *reason, - const char *file, int line) { - if (GRPC_TRACER_ON(grpc_polling_trace)) { - gpr_atm old_cnt = gpr_atm_acq_load(&eps->ref_count); - gpr_log(GPR_DEBUG, "Add ref eps: %p, old:%" PRIdPTR " -> new:%" PRIdPTR - " (%s) - (%s, %d)", - eps, old_cnt, old_cnt + 1, reason, file, line); - } - eps_add_ref(eps); -} - -static void eps_unref_dbg(grpc_exec_ctx *exec_ctx, epoll_set *eps, - const char *reason, const char *file, int line) { - if (GRPC_TRACER_ON(grpc_polling_trace)) { - gpr_atm old_cnt = gpr_atm_acq_load(&eps->ref_count); - gpr_log(GPR_DEBUG, "Unref eps: %p, old:%" PRIdPTR " -> new:%" PRIdPTR - " (%s) - (%s, %d)", - eps, old_cnt, (old_cnt - 1), reason, file, line); - } - eps_unref(exec_ctx, eps); -} -#endif - -static void eps_add_ref(epoll_set *eps) { - gpr_atm_no_barrier_fetch_add(&eps->ref_count, 1); -} - -static void eps_unref(grpc_exec_ctx *exec_ctx, epoll_set *eps) { - /* If ref count went to zero, delete the epoll set. This deletion is - not done under a lock since once the ref count goes to zero, we are - guaranteed that no one else holds a reference to the epoll set (and - that there is no racing eps_add_ref() call either).*/ - if (1 == gpr_atm_full_fetch_add(&eps->ref_count, -1)) { - epoll_set_delete(eps); - } -} - -static void epoll_set_add_fd_locked(epoll_set *eps, grpc_fd *fd, - grpc_error **error) { - int err; - struct epoll_event ev; - char *err_msg; - const char *err_desc = "epoll_set_add_fd_locked"; - -#ifdef GRPC_TSAN - /* See the definition of g_epoll_sync for more context */ - gpr_atm_rel_store(&g_epoll_sync, (gpr_atm)0); -#endif /* defined(GRPC_TSAN) */ - - ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET); - ev.data.ptr = fd; - err = epoll_ctl(eps->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev); - if (err < 0 && errno != EEXIST) { - gpr_asprintf( - &err_msg, - "epoll_ctl (epoll_fd: %d) add fd: %d failed with error: %d (%s)", - eps->epoll_fd, fd->fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } -} - -static void epoll_set_add_wakeup_fd_locked(epoll_set *eps, - grpc_wakeup_fd *wakeup_fd, - grpc_error **error) { - struct epoll_event ev; - int err; - char *err_msg; - const char *err_desc = "epoll_set_add_wakeup_fd"; - - ev.events = (uint32_t)(EPOLLIN | EPOLLET); - ev.data.ptr = wakeup_fd; - err = epoll_ctl(eps->epoll_fd, EPOLL_CTL_ADD, - GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), &ev); - if (err < 0 && errno != EEXIST) { - gpr_asprintf(&err_msg, - "epoll_ctl (epoll_fd: %d) add wakeup fd: %d failed with " - "error: %d (%s)", - eps->epoll_fd, GRPC_WAKEUP_FD_GET_READ_FD(wakeup_fd), errno, - strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } -} - -static void epoll_set_remove_fd(epoll_set *eps, grpc_fd *fd, bool is_fd_closed, - grpc_error **error) { - int err; - char *err_msg; - const char *err_desc = "epoll_set_remove_fd"; - - /* If fd is already closed, then it would have been automatically been removed - from the epoll set */ - if (!is_fd_closed) { - err = epoll_ctl(eps->epoll_fd, EPOLL_CTL_DEL, fd->fd, NULL); - if (err < 0 && errno != ENOENT) { - gpr_asprintf( - &err_msg, - "epoll_ctl (epoll_fd: %d) del fd: %d failed with error: %d (%s)", - eps->epoll_fd, fd->fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - gpr_free(err_msg); - } - } -} - -/* Might return NULL in case of an error */ -static epoll_set *epoll_set_create(grpc_error **error) { - epoll_set *eps = NULL; - const char *err_desc = "epoll_set_create"; - - *error = GRPC_ERROR_NONE; - - eps = gpr_malloc(sizeof(*eps)); - eps->epoll_fd = -1; - - gpr_mu_init(&eps->mu); - - gpr_atm_rel_store(&eps->ref_count, 0); - gpr_atm_rel_store(&eps->poller_count, 0); - - gpr_atm_rel_store(&eps->is_shutdown, false); - - eps->epoll_fd = epoll_create1(EPOLL_CLOEXEC); - - if (eps->epoll_fd < 0) { - append_error(error, GRPC_OS_ERROR(errno, "epoll_create1"), err_desc); - goto done; - } - -done: - if (*error != GRPC_ERROR_NONE) { - epoll_set_delete(eps); - eps = NULL; - } - return eps; -} - -static void epoll_set_delete(epoll_set *eps) { - if (eps->epoll_fd >= 0) { - close(eps->epoll_fd); - } - - gpr_mu_destroy(&eps->mu); - - gpr_free(eps); -} - -static grpc_error *epoll_set_global_init() { - grpc_error *error = GRPC_ERROR_NONE; - - error = grpc_wakeup_fd_init(&epoll_set_wakeup_fd); - if (error == GRPC_ERROR_NONE) { - error = grpc_wakeup_fd_wakeup(&epoll_set_wakeup_fd); - } - - return error; -} - -static void epoll_set_global_shutdown() { - grpc_wakeup_fd_destroy(&epoll_set_wakeup_fd); -} - -/******************************************************************************* - * Fd Definitions - */ - -/* 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. - */ - -static grpc_fd *fd_freelist = NULL; -static gpr_mu fd_freelist_mu; - -static grpc_fd *get_fd_from_freelist() { - grpc_fd *new_fd = NULL; - - gpr_mu_lock(&fd_freelist_mu); - if (fd_freelist != NULL) { - new_fd = fd_freelist; - fd_freelist = fd_freelist->freelist_next; - } - gpr_mu_unlock(&fd_freelist_mu); - return new_fd; -} - -static void add_fd_to_freelist(grpc_fd *fd) { - gpr_mu_lock(&fd_freelist_mu); - fd->freelist_next = fd_freelist; - fd_freelist = fd; - grpc_iomgr_unregister_object(&fd->iomgr_object); - - grpc_lfev_destroy(&fd->read_closure); - grpc_lfev_destroy(&fd->write_closure); - - gpr_mu_unlock(&fd_freelist_mu); -} - -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; - gpr_mu_destroy(&fd->mu); - gpr_free(fd); - } - gpr_mu_destroy(&fd_freelist_mu); -} - -static grpc_fd *fd_create(int fd, const char *name) { - grpc_fd *new_fd = get_fd_from_freelist(); - if (new_fd == NULL) { - new_fd = gpr_malloc(sizeof(grpc_fd)); - gpr_mu_init(&new_fd->mu); - } - - /* Note: It is not really needed to get the new_fd->mu lock here. If this - * is a newly created fd (or an fd we got from the freelist), no one else - * would be holding a lock to it anyway. */ - gpr_mu_lock(&new_fd->mu); - new_fd->eps = NULL; - - new_fd->fd = fd; - new_fd->orphaned = false; - grpc_lfev_init(&new_fd->read_closure); - grpc_lfev_init(&new_fd->write_closure); - - new_fd->freelist_next = NULL; - new_fd->on_done_closure = NULL; - - gpr_mu_unlock(&new_fd->mu); - - char *fd_name; - gpr_asprintf(&fd_name, "%s fd=%d", name, fd); - grpc_iomgr_register_object(&new_fd->iomgr_object, fd_name); - gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, (void *)new_fd, fd_name); - gpr_free(fd_name); - - /* Associate the fd with one of the eps */ - add_fd_to_eps(new_fd); - return new_fd; -} - -static int fd_wrapped_fd(grpc_fd *fd) { - int ret_fd = -1; - gpr_mu_lock(&fd->mu); - if (!fd->orphaned) { - ret_fd = fd->fd; - } - gpr_mu_unlock(&fd->mu); - - return ret_fd; -} - -static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_closure *on_done, int *release_fd, - bool already_closed, const char *reason) { - bool is_fd_closed = already_closed; - grpc_error *error = GRPC_ERROR_NONE; - epoll_set *unref_eps = NULL; - - gpr_mu_lock(&fd->mu); - fd->on_done_closure = on_done; - - /* If release_fd is not NULL, we should be relinquishing control of the file - descriptor fd->fd (but we still own the grpc_fd structure). */ - if (release_fd != NULL) { - *release_fd = fd->fd; - } else if (!is_fd_closed) { - close(fd->fd); - is_fd_closed = true; - } - - fd->orphaned = true; - - /* Remove the fd from the epoll set */ - if (fd->eps != NULL) { - epoll_set_remove_fd(fd->eps, fd, is_fd_closed, &error); - unref_eps = fd->eps; - fd->eps = NULL; - } - - GRPC_CLOSURE_SCHED(exec_ctx, fd->on_done_closure, GRPC_ERROR_REF(error)); - - gpr_mu_unlock(&fd->mu); - - /* We are done with this fd. Release it (i.e add back to freelist) */ - add_fd_to_freelist(fd); - - if (unref_eps != NULL) { - /* Unref stale epoll set here, outside the fd lock above. - The epoll set owns a workqueue which owns an fd, and unreffing - inside the lock can cause an eventual lock loop that makes TSAN very - unhappy. */ - EPS_UNREF(exec_ctx, unref_eps, "fd_orphan"); - } - GRPC_LOG_IF_ERROR("fd_orphan", GRPC_ERROR_REF(error)); - GRPC_ERROR_UNREF(error); -} - -/* This polling engine doesn't really need the read notifier functionality. So - * it just returns a dummy read notifier pollset */ -static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx, - grpc_fd *fd) { - return &g_read_notifier; -} - -static bool fd_is_shutdown(grpc_fd *fd) { - return grpc_lfev_is_shutdown(&fd->read_closure); -} - -/* Might be called multiple times */ -static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_error *why) { - if (grpc_lfev_set_shutdown(exec_ctx, &fd->read_closure, - GRPC_ERROR_REF(why))) { - shutdown(fd->fd, SHUT_RDWR); - grpc_lfev_set_shutdown(exec_ctx, &fd->write_closure, GRPC_ERROR_REF(why)); - } - GRPC_ERROR_UNREF(why); -} - -static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_closure *closure) { - grpc_lfev_notify_on(exec_ctx, &fd->read_closure, closure, "read"); -} - -static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd, - grpc_closure *closure) { - grpc_lfev_notify_on(exec_ctx, &fd->write_closure, closure, "write"); -} - -/******************************************************************************* - * Pollset Definitions - */ -/* TODO: sreek - Not needed anymore */ -GPR_TLS_DECL(g_current_thread_pollset); -GPR_TLS_DECL(g_current_thread_worker); - -static void pollset_worker_init(grpc_pollset_worker *worker) { - worker->next = worker->prev = NULL; - gpr_cv_init(&worker->kick_cv); -} - -/* Global state management */ -static grpc_error *pollset_global_init(void) { - gpr_tls_init(&g_current_thread_pollset); - gpr_tls_init(&g_current_thread_worker); - return GRPC_ERROR_NONE; -} - -static void pollset_global_shutdown(void) { - gpr_tls_destroy(&g_current_thread_pollset); - gpr_tls_destroy(&g_current_thread_worker); -} - -static grpc_error *pollset_worker_kick(grpc_pollset_worker *worker) { - gpr_cv_signal(&worker->kick_cv); - return GRPC_ERROR_NONE; -} - -/* Return 1 if the pollset has active threads in pollset_work (pollset must - * be locked) */ -static int pollset_has_workers(grpc_pollset *p) { - return p->root_worker.next != &p->root_worker; -} - -static void remove_worker(grpc_pollset *p, grpc_pollset_worker *worker) { - worker->prev->next = worker->next; - worker->next->prev = worker->prev; -} - -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; -} - -/* p->mu must be held before calling this function */ -static grpc_error *pollset_kick(grpc_pollset *p, - grpc_pollset_worker *specific_worker) { - GPR_TIMER_BEGIN("pollset_kick", 0); - grpc_error *error = GRPC_ERROR_NONE; - const char *err_desc = "Kick Failure"; - grpc_pollset_worker *worker = specific_worker; - if (worker != NULL) { - if (worker == GRPC_POLLSET_KICK_BROADCAST) { - if (pollset_has_workers(p)) { - GPR_TIMER_BEGIN("pollset_kick.broadcast", 0); - for (worker = p->root_worker.next; worker != &p->root_worker; - worker = worker->next) { - if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) { - append_error(&error, pollset_worker_kick(worker), err_desc); - } - } - GPR_TIMER_END("pollset_kick.broadcast", 0); - } else { - p->kicked_without_pollers = true; - } - } else { - GPR_TIMER_MARK("kicked_specifically", 0); - if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) { - append_error(&error, pollset_worker_kick(worker), err_desc); - } - } - } else if (gpr_tls_get(&g_current_thread_pollset) != (intptr_t)p) { - /* Since worker == NULL, it means that we can kick "any" worker on this - pollset 'p'. If 'p' happens to be the same pollset this thread is - currently polling (i.e in pollset_work() function), then there is no need - to kick any other worker since the current thread can just absorb the - kick. This is the reason why we enter this case only when - g_current_thread_pollset is != p */ - - GPR_TIMER_MARK("kick_anonymous", 0); - worker = pop_front_worker(p); - if (worker != NULL) { - GPR_TIMER_MARK("finally_kick", 0); - push_back_worker(p, worker); - append_error(&error, pollset_worker_kick(worker), err_desc); - } else { - GPR_TIMER_MARK("kicked_no_pollers", 0); - p->kicked_without_pollers = true; - } - } - - GPR_TIMER_END("pollset_kick", 0); - GRPC_LOG_IF_ERROR("pollset_kick", GRPC_ERROR_REF(error)); - return error; -} - -static void pollset_init(grpc_pollset *pollset, gpr_mu **mu) { - gpr_mu_init(&pollset->mu); - *mu = &pollset->mu; - pollset->eps = NULL; - - pollset->root_worker.next = pollset->root_worker.prev = &pollset->root_worker; - pollset->kicked_without_pollers = false; - - pollset->shutting_down = false; - pollset->finish_shutdown_called = false; - pollset->shutdown_done = NULL; -} - -static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) { - grpc_lfev_set_ready(exec_ctx, &fd->read_closure, "read"); -} - -static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) { - grpc_lfev_set_ready(exec_ctx, &fd->write_closure, "write"); -} - -static void pollset_release_epoll_set(grpc_exec_ctx *exec_ctx, grpc_pollset *ps, - char *reason) { - if (ps->eps != NULL) { - EPS_UNREF(exec_ctx, ps->eps, reason); - } - ps->eps = NULL; -} - -static void finish_shutdown_locked(grpc_exec_ctx *exec_ctx, - grpc_pollset *pollset) { - /* The pollset cannot have any workers if we are at this stage */ - GPR_ASSERT(!pollset_has_workers(pollset)); - - pollset->finish_shutdown_called = true; - - /* Release the ref and set pollset->eps to NULL */ - pollset_release_epoll_set(exec_ctx, pollset, "ps_shutdown"); - GRPC_CLOSURE_SCHED(exec_ctx, pollset->shutdown_done, GRPC_ERROR_NONE); -} - -/* pollset->mu lock must be held by the caller before calling this */ -static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, - grpc_closure *closure) { - GPR_TIMER_BEGIN("pollset_shutdown", 0); - GPR_ASSERT(!pollset->shutting_down); - pollset->shutting_down = true; - pollset->shutdown_done = closure; - pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST); - - /* If the pollset has any workers, we cannot call finish_shutdown_locked() - because it would release the underlying epoll set. In such a case, we - let the last worker call finish_shutdown_locked() from pollset_work() */ - if (!pollset_has_workers(pollset)) { - GPR_ASSERT(!pollset->finish_shutdown_called); - GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0); - finish_shutdown_locked(exec_ctx, pollset); - } - GPR_TIMER_END("pollset_shutdown", 0); -} - -/* pollset_shutdown is guaranteed to be called before pollset_destroy. So other - * than destroying the mutexes, there is nothing special that needs to be done - * here */ -static void pollset_destroy(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset) { - GPR_ASSERT(!pollset_has_workers(pollset)); - gpr_mu_destroy(&pollset->mu); -} - -/* Blocking call */ -static void acquire_epoll_lease(epoll_set *eps) { - if (g_num_threads_per_eps > 1) { - gpr_mu_lock(&eps->mu); - } -} - -static void release_epoll_lease(epoll_set *eps) { - if (g_num_threads_per_eps > 1) { - gpr_mu_unlock(&eps->mu); - } -} - -#define GRPC_EPOLL_MAX_EVENTS 100 -static void do_epoll_wait(grpc_exec_ctx *exec_ctx, int epoll_fd, epoll_set *eps, - grpc_error **error) { - struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS]; - int ep_rv; - char *err_msg; - const char *err_desc = "do_epoll_wait"; - - int timeout_ms = -1; - - GRPC_SCHEDULING_START_BLOCKING_REGION; - acquire_epoll_lease(eps); - GRPC_STATS_INC_SYSCALL_POLL(exec_ctx); - ep_rv = epoll_wait(epoll_fd, ep_ev, GRPC_EPOLL_MAX_EVENTS, timeout_ms); - release_epoll_lease(eps); - GRPC_SCHEDULING_END_BLOCKING_REGION; - - if (ep_rv < 0) { - gpr_asprintf(&err_msg, - "epoll_wait() epoll fd: %d failed with error: %d (%s)", - epoll_fd, errno, strerror(errno)); - append_error(error, GRPC_OS_ERROR(errno, err_msg), err_desc); - } - -#ifdef GRPC_TSAN - /* See the definition of g_poll_sync for more details */ - gpr_atm_acq_load(&g_epoll_sync); -#endif /* defined(GRPC_TSAN) */ - - for (int i = 0; i < ep_rv; ++i) { - void *data_ptr = ep_ev[i].data.ptr; - if (data_ptr == &epoll_set_wakeup_fd) { - gpr_atm_rel_store(&eps->is_shutdown, 1); - gpr_log(GPR_INFO, "pollset poller: shutdown set"); - } else { - grpc_fd *fd = data_ptr; - 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 (read_ev || cancel) { - fd_become_readable(exec_ctx, fd); - } - if (write_ev || cancel) { - fd_become_writable(exec_ctx, fd); - } - } - } -} - -static void epoll_set_work(grpc_exec_ctx *exec_ctx, epoll_set *eps, - grpc_error **error) { - int epoll_fd = -1; - GPR_TIMER_BEGIN("epoll_set_work", 0); - - /* Since epoll_fd is immutable, it is safe to read it without a lock on the - epoll set. */ - epoll_fd = eps->epoll_fd; - - gpr_atm_no_barrier_fetch_add(&eps->poller_count, 1); - g_current_thread_epoll_set = eps; - - do_epoll_wait(exec_ctx, epoll_fd, eps, error); - - g_current_thread_epoll_set = NULL; - gpr_atm_no_barrier_fetch_add(&eps->poller_count, -1); - - GPR_TIMER_END("epoll_set_work", 0); -} - -/* pollset->mu lock must be held by the caller before calling this. - The function pollset_work() may temporarily release the lock (pollset->mu) - during the course of its execution but it will always re-acquire the lock and - ensure that it is held by the time the function returns */ -static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, - grpc_pollset_worker **worker_hdl, - gpr_timespec now, gpr_timespec deadline) { - GPR_TIMER_BEGIN("pollset_work", 0); - grpc_error *error = GRPC_ERROR_NONE; - - grpc_pollset_worker worker; - pollset_worker_init(&worker); - - if (worker_hdl) *worker_hdl = &worker; - - gpr_tls_set(&g_current_thread_pollset, (intptr_t)pollset); - gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker); - - if (pollset->kicked_without_pollers) { - /* If the pollset was kicked without pollers, pretend that the current - worker got the kick and skip polling. A kick indicates that there is some - work that needs attention like an event on the completion queue or an - alarm */ - GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0); - pollset->kicked_without_pollers = 0; - } else if (!pollset->shutting_down) { - push_front_worker(pollset, &worker); - - gpr_cv_wait(&worker.kick_cv, &pollset->mu, - gpr_convert_clock_type(deadline, GPR_CLOCK_REALTIME)); - /* pollset->mu locked here */ - - remove_worker(pollset, &worker); - } - - /* If we are the last worker on the pollset (i.e pollset_has_workers() is - false at this point) and the pollset is shutting down, we may have to - finish the shutdown process by calling finish_shutdown_locked(). - See pollset_shutdown() for more details. - - Note: Continuing to access pollset here is safe; it is the caller's - responsibility to not destroy a pollset when it has outstanding calls to - pollset_work() */ - if (pollset->shutting_down && !pollset_has_workers(pollset) && - !pollset->finish_shutdown_called) { - GPR_TIMER_MARK("pollset_work.finish_shutdown_locked", 0); - finish_shutdown_locked(exec_ctx, pollset); - - gpr_mu_unlock(&pollset->mu); - grpc_exec_ctx_flush(exec_ctx); - gpr_mu_lock(&pollset->mu); - } - - if (worker_hdl) *worker_hdl = NULL; - - gpr_tls_set(&g_current_thread_pollset, (intptr_t)0); - gpr_tls_set(&g_current_thread_worker, (intptr_t)0); - - GPR_TIMER_END("pollset_work", 0); - - GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error)); - return error; -} - -static void pollset_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, - grpc_fd *fd) { - /* Nothing to do */ -} - -/******************************************************************************* - * Pollset-set Definitions - */ -grpc_pollset_set g_dummy_pollset_set; -static grpc_pollset_set *pollset_set_create(void) { - return &g_dummy_pollset_set; -} - -static void pollset_set_destroy(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *pss) { - /* Nothing to do */ -} - -static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss, - grpc_fd *fd) { - /* Nothing to do */ -} - -static void pollset_set_del_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss, - grpc_fd *fd) { - /* Nothing to do */ -} - -static void pollset_set_add_pollset(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *pss, grpc_pollset *ps) { - /* Nothing to do */ -} - -static void pollset_set_del_pollset(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *pss, grpc_pollset *ps) { - /* Nothing to do */ -} - -static void pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *bag, - grpc_pollset_set *item) { - /* Nothing to do */ -} - -static void pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx, - grpc_pollset_set *bag, - grpc_pollset_set *item) { - /* Nothing to do */ -} - -/******************************************************************************* - * Event engine binding - */ - -static void shutdown_engine(void) { - shutdown_poller_threads(); - shutdown_epoll_sets(); - fd_global_shutdown(); - pollset_global_shutdown(); - epoll_set_global_shutdown(); - gpr_log(GPR_INFO, "ev-epoll-threadpool engine shutdown complete"); -} - -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_is_shutdown = fd_is_shutdown, - .fd_notify_on_read = fd_notify_on_read, - .fd_notify_on_write = fd_notify_on_write, - .fd_get_read_notifier_pollset = fd_get_read_notifier_pollset, - - .pollset_init = pollset_init, - .pollset_shutdown = pollset_shutdown, - .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, - - .shutdown_engine = shutdown_engine, -}; - -/***************************************************************************** - * Dedicated polling threads and pollsets - Definitions - */ -static void add_fd_to_eps(grpc_fd *fd) { - GPR_ASSERT(fd->eps == NULL); - GPR_TIMER_BEGIN("add_fd_to_eps", 0); - - grpc_error *error = GRPC_ERROR_NONE; - size_t idx = (size_t)gpr_atm_no_barrier_fetch_add(&g_next_eps, 1) % g_num_eps; - epoll_set *eps = g_epoll_sets[idx]; - - gpr_mu_lock(&fd->mu); - - if (fd->orphaned) { - gpr_mu_unlock(&fd->mu); - return; /* Early out */ - } - - epoll_set_add_fd_locked(eps, fd, &error); - EPS_ADD_REF(eps, "fd"); - fd->eps = eps; - - GRPC_POLLING_TRACE("add_fd_to_eps (fd: %d, eps idx = %" PRIdPTR ")", fd->fd, - idx); - gpr_mu_unlock(&fd->mu); - - GRPC_LOG_IF_ERROR("add_fd_to_eps", error); - GPR_TIMER_END("add_fd_to_eps", 0); -} - -static bool init_epoll_sets() { - grpc_error *error = GRPC_ERROR_NONE; - bool is_success = true; - - g_epoll_sets = (epoll_set **)malloc(g_num_eps * sizeof(epoll_set *)); - - for (size_t i = 0; i < g_num_eps; i++) { - g_epoll_sets[i] = epoll_set_create(&error); - if (g_epoll_sets[i] == NULL) { - gpr_log(GPR_ERROR, "Error in creating a epoll set"); - g_num_eps = i; /* Helps cleanup */ - shutdown_epoll_sets(); - is_success = false; - goto done; - } - - EPS_ADD_REF(g_epoll_sets[i], "init_epoll_sets"); - } - - gpr_atm_no_barrier_store(&g_next_eps, 0); - gpr_mu *mu; - pollset_init(&g_read_notifier, &mu); - -done: - GRPC_LOG_IF_ERROR("init_epoll_sets", error); - return is_success; -} - -static void shutdown_epoll_sets() { - if (!g_epoll_sets) { - return; - } - - grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; - for (size_t i = 0; i < g_num_eps; i++) { - EPS_UNREF(&exec_ctx, g_epoll_sets[i], "shutdown_epoll_sets"); - } - grpc_exec_ctx_flush(&exec_ctx); - - gpr_free(g_epoll_sets); - g_epoll_sets = NULL; - pollset_destroy(&exec_ctx, &g_read_notifier); - grpc_exec_ctx_finish(&exec_ctx); -} - -static void poller_thread_loop(void *arg) { - grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; - grpc_error *error = GRPC_ERROR_NONE; - epoll_set *eps = (epoll_set *)arg; - - while (!gpr_atm_acq_load(&eps->is_shutdown)) { - epoll_set_work(&exec_ctx, eps, &error); - grpc_exec_ctx_flush(&exec_ctx); - } - - grpc_exec_ctx_finish(&exec_ctx); - GRPC_LOG_IF_ERROR("poller_thread_loop", error); -} - -/* g_epoll_sets MUST be initialized before calling this */ -static void start_poller_threads() { - GPR_ASSERT(g_epoll_sets); - - gpr_log(GPR_INFO, "Starting poller threads"); - - size_t num_threads = g_num_eps * g_num_threads_per_eps; - g_poller_threads = (gpr_thd_id *)malloc(num_threads * sizeof(gpr_thd_id)); - gpr_thd_options options = gpr_thd_options_default(); - gpr_thd_options_set_joinable(&options); - - for (size_t i = 0; i < num_threads; i++) { - gpr_thd_new(&g_poller_threads[i], poller_thread_loop, - (void *)g_epoll_sets[i % g_num_eps], &options); - } -} - -static void shutdown_poller_threads() { - GPR_ASSERT(g_poller_threads); - GPR_ASSERT(g_epoll_sets); - grpc_error *error = GRPC_ERROR_NONE; - - gpr_log(GPR_INFO, "Shutting down pollers"); - - epoll_set *eps = NULL; - size_t num_threads = g_num_eps * g_num_threads_per_eps; - for (size_t i = 0; i < num_threads; i++) { - eps = g_epoll_sets[i]; - epoll_set_add_wakeup_fd_locked(eps, &epoll_set_wakeup_fd, &error); - } - - for (size_t i = 0; i < g_num_eps; i++) { - gpr_thd_join(g_poller_threads[i]); - } - - GRPC_LOG_IF_ERROR("shutdown_poller_threads", error); - gpr_free(g_poller_threads); - g_poller_threads = NULL; -} - -/****************************************************************************/ - -/* It is possible that GLIBC has epoll but the underlying kernel doesn't. - * Create a dummy epoll_fd to make sure epoll support is available */ -static bool is_epoll_available() { - int fd = epoll_create1(EPOLL_CLOEXEC); - if (fd < 0) { - gpr_log( - GPR_ERROR, - "epoll_create1 failed with error: %d. Not using epoll polling engine", - fd); - return false; - } - close(fd); - return true; -} - -const grpc_event_engine_vtable *grpc_init_epoll_thread_pool_linux( - bool requested_explicitly) { - if (!requested_explicitly) return NULL; - - if (!grpc_has_wakeup_fd()) { - return NULL; - } - - if (!is_epoll_available()) { - return NULL; - } - - fd_global_init(); - - if (!GRPC_LOG_IF_ERROR("pollset_global_init", pollset_global_init())) { - return NULL; - } - - if (!GRPC_LOG_IF_ERROR("epoll_set_global_init", epoll_set_global_init())) { - return NULL; - } - - if (!init_epoll_sets()) { - return NULL; - } - - /* TODO (sreek): Maynot be a good idea to start threads here (especially if - * this engine doesn't get picked. Consider introducing an engine_init - * function in the vtable */ - start_poller_threads(); - return &vtable; -} - -#else /* defined(GRPC_LINUX_EPOLL) */ -#if defined(GRPC_POSIX_SOCKET) -#include "src/core/lib/iomgr/ev_posix.h" -/* If GRPC_LINUX_EPOLL is not defined, it means epoll is not available. Return - * NULL */ -const grpc_event_engine_vtable *grpc_init_epoll_thread_pool_linux( - bool requested_explicitly) { - return NULL; -} -#endif /* defined(GRPC_POSIX_SOCKET) */ -#endif /* !defined(GRPC_LINUX_EPOLL) */ diff --git a/src/core/lib/iomgr/ev_epoll_thread_pool_linux.h b/src/core/lib/iomgr/ev_epoll_thread_pool_linux.h deleted file mode 100644 index 2ca68cc9d1..0000000000 --- a/src/core/lib/iomgr/ev_epoll_thread_pool_linux.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * - * Copyright 2017 gRPC authors. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ - -#ifndef GRPC_CORE_LIB_IOMGR_EV_EPOLL_THREAD_POOL_LINUX_H -#define GRPC_CORE_LIB_IOMGR_EV_EPOLL_THREAD_POOL_LINUX_H - -#include "src/core/lib/iomgr/ev_posix.h" -#include "src/core/lib/iomgr/port.h" - -const grpc_event_engine_vtable *grpc_init_epoll_thread_pool_linux( - bool requested_explicitly); - -#endif /* GRPC_CORE_LIB_IOMGR_EV_EPOLL_THREAD_POOL_LINUX_H */ diff --git a/src/core/lib/iomgr/ev_posix.c b/src/core/lib/iomgr/ev_posix.c index 424b40e425..bb43061ff5 100644 --- a/src/core/lib/iomgr/ev_posix.c +++ b/src/core/lib/iomgr/ev_posix.c @@ -31,8 +31,6 @@ #include "src/core/lib/debug/trace.h" #include "src/core/lib/iomgr/ev_epoll1_linux.h" -#include "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h" -#include "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h" #include "src/core/lib/iomgr/ev_epollex_linux.h" #include "src/core/lib/iomgr/ev_epollsig_linux.h" #include "src/core/lib/iomgr/ev_poll_posix.h" @@ -66,8 +64,6 @@ typedef struct { static const event_engine_factory g_factories[] = { {"epoll1", grpc_init_epoll1_linux}, {"epollsig", grpc_init_epollsig_linux}, - {"epoll-threadpool", grpc_init_epoll_thread_pool_linux}, - {"epoll-limited", grpc_init_epoll_limited_pollers_linux}, {"poll", grpc_init_poll_posix}, {"poll-cv", grpc_init_poll_cv_posix}, {"epollex", grpc_init_epollex_linux}, diff --git a/src/core/lib/iomgr/tcp_posix.c b/src/core/lib/iomgr/tcp_posix.c index 5a1fe42a58..b15b6d8746 100644 --- a/src/core/lib/iomgr/tcp_posix.c +++ b/src/core/lib/iomgr/tcp_posix.c @@ -68,7 +68,6 @@ typedef struct { grpc_fd *em_fd; int fd; bool finished_edge; - msg_iovlen_type iov_size; /* Number of slices to allocate per read attempt */ double target_length; double bytes_read_this_round; gpr_refcount refcount; @@ -381,7 +380,6 @@ static void tcp_do_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) { size_t i; GPR_ASSERT(!tcp->finished_edge); - GPR_ASSERT(tcp->iov_size <= MAX_READ_IOVEC); GPR_ASSERT(tcp->incoming_buffer->count <= MAX_READ_IOVEC); GPR_TIMER_BEGIN("tcp_continue_read", 0); @@ -393,7 +391,7 @@ static void tcp_do_read(grpc_exec_ctx *exec_ctx, grpc_tcp *tcp) { msg.msg_name = NULL; msg.msg_namelen = 0; msg.msg_iov = iov; - msg.msg_iovlen = tcp->iov_size; + msg.msg_iovlen = (msg_iovlen_type)tcp->incoming_buffer->count; msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_flags = 0; @@ -775,7 +773,6 @@ grpc_endpoint *grpc_tcp_create(grpc_exec_ctx *exec_ctx, grpc_fd *em_fd, tcp->min_read_chunk_size = tcp_min_read_chunk_size; tcp->max_read_chunk_size = tcp_max_read_chunk_size; tcp->bytes_read_this_round = 0; - tcp->iov_size = 1; tcp->finished_edge = true; /* paired with unref in grpc_tcp_destroy */ gpr_ref_init(&tcp->refcount, 1); diff --git a/src/core/lib/surface/call.h b/src/core/lib/surface/call.h index 185bfccb77..d537637cbb 100644 --- a/src/core/lib/surface/call.h +++ b/src/core/lib/surface/call.h @@ -19,6 +19,10 @@ #ifndef GRPC_CORE_LIB_SURFACE_CALL_H #define GRPC_CORE_LIB_SURFACE_CALL_H +#ifdef __cplusplus +extern "C" { +#endif + #include "src/core/lib/channel/channel_stack.h" #include "src/core/lib/channel/context.h" #include "src/core/lib/surface/api_trace.h" @@ -26,10 +30,6 @@ #include <grpc/grpc.h> #include <grpc/impl/codegen/compression_types.h> -#ifdef __cplusplus -extern "C" { -#endif - typedef void (*grpc_ioreq_completion_func)(grpc_exec_ctx *exec_ctx, grpc_call *call, int success, void *user_data); @@ -89,7 +89,7 @@ grpc_call_error grpc_call_start_batch_and_execute(grpc_exec_ctx *exec_ctx, /* Given the top call_element, get the call object. */ grpc_call *grpc_call_from_top_element(grpc_call_element *surface_element); -void grpc_call_log_batch(char *file, int line, gpr_log_severity severity, +void grpc_call_log_batch(const char *file, int line, gpr_log_severity severity, grpc_call *call, const grpc_op *ops, size_t nops, void *tag); diff --git a/src/core/lib/surface/call_log_batch.c b/src/core/lib/surface/call_log_batch.c index 4443aba58a..4a1c265817 100644 --- a/src/core/lib/surface/call_log_batch.c +++ b/src/core/lib/surface/call_log_batch.c @@ -103,7 +103,7 @@ char *grpc_op_string(const grpc_op *op) { return out; } -void grpc_call_log_batch(char *file, int line, gpr_log_severity severity, +void grpc_call_log_batch(const char *file, int line, gpr_log_severity severity, grpc_call *call, const grpc_op *ops, size_t nops, void *tag) { char *tmp; diff --git a/src/cpp/server/server_cc.cc b/src/cpp/server/server_cc.cc index 2483300cb1..6bd3ecda32 100644 --- a/src/cpp/server/server_cc.cc +++ b/src/cpp/server/server_cc.cc @@ -17,6 +17,7 @@ #include <grpc++/server.h> +#include <cstdlib> #include <sstream> #include <utility> @@ -38,6 +39,7 @@ #include "src/core/ext/transport/inproc/inproc_transport.h" #include "src/core/lib/profiling/timers.h" +#include "src/core/lib/surface/call.h" #include "src/cpp/client/create_channel_internal.h" #include "src/cpp/server/health/default_health_check_service.h" #include "src/cpp/thread_manager/thread_manager.h" @@ -607,7 +609,12 @@ void Server::PerformOpsOnCall(CallOpSetInterface* ops, Call* call) { grpc_op cops[MAX_OPS]; ops->FillOps(call->call(), cops, &nops); auto result = grpc_call_start_batch(call->call(), cops, nops, ops, nullptr); - GPR_ASSERT(GRPC_CALL_OK == result); + if (result != GRPC_CALL_OK) { + gpr_log(GPR_ERROR, "Fatal: grpc_call_start_batch returned %d", result); + grpc_call_log_batch(__FILE__, __LINE__, GPR_LOG_SEVERITY_ERROR, + call->call(), cops, nops, ops); + abort(); + } } ServerInterface::BaseAsyncRequest::BaseAsyncRequest( diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py index 1cbf345ab6..a0a1702903 100644 --- a/src/python/grpcio/grpc_core_dependencies.py +++ b/src/python/grpcio/grpc_core_dependencies.py @@ -85,8 +85,6 @@ CORE_SOURCE_FILES = [ 'src/core/lib/iomgr/endpoint_pair_windows.c', 'src/core/lib/iomgr/error.c', 'src/core/lib/iomgr/ev_epoll1_linux.c', - 'src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c', - 'src/core/lib/iomgr/ev_epoll_thread_pool_linux.c', 'src/core/lib/iomgr/ev_epollex_linux.c', 'src/core/lib/iomgr/ev_epollsig_linux.c', 'src/core/lib/iomgr/ev_poll_posix.c', diff --git a/test/cpp/end2end/client_lb_end2end_test.cc b/test/cpp/end2end/client_lb_end2end_test.cc index b588eda84f..54408db600 100644 --- a/test/cpp/end2end/client_lb_end2end_test.cc +++ b/test/cpp/end2end/client_lb_end2end_test.cc @@ -180,16 +180,18 @@ class ClientLbEnd2endTest : public ::testing::Test { std::unique_ptr<Server> server_; MyTestServiceImpl service_; std::unique_ptr<std::thread> thread_; + bool server_ready_ = false; explicit ServerData(const grpc::string& server_host, int port = 0) { port_ = port > 0 ? port : grpc_pick_unused_port_or_die(); gpr_log(GPR_INFO, "starting server on port %d", port_); std::mutex mu; + std::unique_lock<std::mutex> lock(mu); std::condition_variable cond; thread_.reset(new std::thread( std::bind(&ServerData::Start, this, server_host, &mu, &cond))); - std::unique_lock<std::mutex> lock(mu); - cond.wait(lock); + cond.wait(lock, [this] { return server_ready_; }); + server_ready_ = false; gpr_log(GPR_INFO, "server startup complete"); } @@ -203,6 +205,7 @@ class ClientLbEnd2endTest : public ::testing::Test { builder.RegisterService(&service_); server_ = builder.BuildAndStart(); std::lock_guard<std::mutex> lock(*mu); + server_ready_ = true; cond->notify_one(); } diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal index 91c149eec9..bf1c2d7d49 100644 --- a/tools/doxygen/Doxyfile.c++.internal +++ b/tools/doxygen/Doxyfile.c++.internal @@ -955,8 +955,6 @@ src/core/lib/iomgr/endpoint_pair.h \ src/core/lib/iomgr/error.h \ src/core/lib/iomgr/error_internal.h \ src/core/lib/iomgr/ev_epoll1_linux.h \ -src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h \ -src/core/lib/iomgr/ev_epoll_thread_pool_linux.h \ src/core/lib/iomgr/ev_epollex_linux.h \ src/core/lib/iomgr/ev_epollsig_linux.h \ src/core/lib/iomgr/ev_poll_posix.h \ diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal index 26d982acd7..d248123296 100644 --- a/tools/doxygen/Doxyfile.core.internal +++ b/tools/doxygen/Doxyfile.core.internal @@ -1106,10 +1106,6 @@ src/core/lib/iomgr/error.h \ src/core/lib/iomgr/error_internal.h \ src/core/lib/iomgr/ev_epoll1_linux.c \ src/core/lib/iomgr/ev_epoll1_linux.h \ -src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c \ -src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h \ -src/core/lib/iomgr/ev_epoll_thread_pool_linux.c \ -src/core/lib/iomgr/ev_epoll_thread_pool_linux.h \ src/core/lib/iomgr/ev_epollex_linux.c \ src/core/lib/iomgr/ev_epollex_linux.h \ src/core/lib/iomgr/ev_epollsig_linux.c \ diff --git a/tools/gce/create_linux_performance_worker.sh b/tools/gce/create_linux_performance_worker.sh index 9b85f7b437..7f53732c05 100755 --- a/tools/gce/create_linux_performance_worker.sh +++ b/tools/gce/create_linux_performance_worker.sh @@ -34,7 +34,7 @@ gcloud compute instances create $INSTANCE_NAME \ --zone "$ZONE" \ --machine-type $MACHINE_TYPE \ --image-project ubuntu-os-cloud \ - --image-family ubuntu-1610 \ + --image-family ubuntu-1704 \ --boot-disk-size 300 \ --scopes https://www.googleapis.com/auth/bigquery diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json index fbd47389f7..13f2e60d07 100644 --- a/tools/run_tests/generated/sources_and_headers.json +++ b/tools/run_tests/generated/sources_and_headers.json @@ -7869,8 +7869,6 @@ "src/core/lib/iomgr/endpoint_pair_windows.c", "src/core/lib/iomgr/error.c", "src/core/lib/iomgr/ev_epoll1_linux.c", - "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.c", - "src/core/lib/iomgr/ev_epoll_thread_pool_linux.c", "src/core/lib/iomgr/ev_epollex_linux.c", "src/core/lib/iomgr/ev_epollsig_linux.c", "src/core/lib/iomgr/ev_poll_posix.c", @@ -8021,8 +8019,6 @@ "src/core/lib/iomgr/error.h", "src/core/lib/iomgr/error_internal.h", "src/core/lib/iomgr/ev_epoll1_linux.h", - "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h", - "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h", "src/core/lib/iomgr/ev_epollex_linux.h", "src/core/lib/iomgr/ev_epollsig_linux.h", "src/core/lib/iomgr/ev_poll_posix.h", @@ -8153,8 +8149,6 @@ "src/core/lib/iomgr/error.h", "src/core/lib/iomgr/error_internal.h", "src/core/lib/iomgr/ev_epoll1_linux.h", - "src/core/lib/iomgr/ev_epoll_limited_pollers_linux.h", - "src/core/lib/iomgr/ev_epoll_thread_pool_linux.h", "src/core/lib/iomgr/ev_epollex_linux.h", "src/core/lib/iomgr/ev_epollsig_linux.h", "src/core/lib/iomgr/ev_poll_posix.h", diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py index 0db5e4ef83..9b20fae78f 100755 --- a/tools/run_tests/run_performance_tests.py +++ b/tools/run_tests/run_performance_tests.py @@ -281,18 +281,18 @@ def create_qpsworkers(languages, worker_hosts, perf_cmd=None): for worker_idx, worker in enumerate(workers)] -def perf_report_processor_job(worker_host, perf_base_name, output_filename): +def perf_report_processor_job(worker_host, perf_base_name, output_filename, flame_graph_reports): print('Creating perf report collection job for %s' % worker_host) cmd = '' if worker_host != 'localhost': user_at_host = "%s@%s" % (_REMOTE_HOST_USERNAME, worker_host) cmd = "USER_AT_HOST=%s OUTPUT_FILENAME=%s OUTPUT_DIR=%s PERF_BASE_NAME=%s\ tools/run_tests/performance/process_remote_perf_flamegraphs.sh" \ - % (user_at_host, output_filename, args.flame_graph_reports, perf_base_name) + % (user_at_host, output_filename, flame_graph_reports, perf_base_name) else: cmd = "OUTPUT_FILENAME=%s OUTPUT_DIR=%s PERF_BASE_NAME=%s\ tools/run_tests/performance/process_local_perf_flamegraphs.sh" \ - % (output_filename, args.flame_graph_reports, perf_base_name) + % (output_filename, flame_graph_reports, perf_base_name) return jobset.JobSpec(cmdline=cmd, timeout_seconds=3*60, @@ -332,7 +332,7 @@ def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*', for language in languages: for scenario_json in language.scenarios(): - if re.search(args.regex, scenario_json['name']): + if re.search(regex, scenario_json['name']): categories = scenario_json.get('CATEGORIES', ['scalable', 'smoketest']) if category in categories or category == 'all': workers = workers_by_lang[str(language)][:] @@ -376,7 +376,7 @@ def create_scenarios(languages, workers_by_lang, remote_host=None, regex='.*', return scenarios -def finish_qps_workers(jobs): +def finish_qps_workers(jobs, qpsworker_jobs): """Waits for given jobs to finish and eventually kills them.""" retries = 0 num_killed = 0 @@ -399,10 +399,10 @@ profile_output_files = [] # Collect perf text reports and flamegraphs if perf_cmd was used # Note the base names of perf text reports are used when creating and processing # perf data. The scenario name uniqifies the output name in the final -# perf reports directory. +# perf reports directory. # Alos, the perf profiles need to be fetched and processed after each scenario # in order to avoid clobbering the output files. -def run_collect_perf_profile_jobs(hosts_and_base_names, scenario_name): +def run_collect_perf_profile_jobs(hosts_and_base_names, scenario_name, flame_graph_reports): perf_report_jobs = [] global profile_output_files for host_and_port in hosts_and_base_names: @@ -411,181 +411,184 @@ def run_collect_perf_profile_jobs(hosts_and_base_names, scenario_name): # from the base filename, create .svg output filename host = host_and_port.split(':')[0] profile_output_files.append('%s.svg' % output_filename) - perf_report_jobs.append(perf_report_processor_job(host, perf_base_name, output_filename)) + perf_report_jobs.append(perf_report_processor_job(host, perf_base_name, output_filename, flame_graph_reports)) jobset.message('START', 'Collecting perf reports from qps workers', do_newline=True) failures, _ = jobset.run(perf_report_jobs, newline_on_success=True, maxjobs=1, clear_alarms=False) jobset.message('END', 'Collecting perf reports from qps workers', do_newline=True) return failures +def main(): + argp = argparse.ArgumentParser(description='Run performance tests.') + argp.add_argument('-l', '--language', + choices=['all'] + sorted(scenario_config.LANGUAGES.keys()), + nargs='+', + required=True, + help='Languages to benchmark.') + argp.add_argument('--remote_driver_host', + default=None, + help='Run QPS driver on given host. By default, QPS driver is run locally.') + argp.add_argument('--remote_worker_host', + nargs='+', + default=[], + help='Worker hosts where to start QPS workers.') + argp.add_argument('--dry_run', + default=False, + action='store_const', + const=True, + help='Just list scenarios to be run, but don\'t run them.') + argp.add_argument('-r', '--regex', default='.*', type=str, + help='Regex to select scenarios to run.') + argp.add_argument('--bq_result_table', default=None, type=str, + help='Bigquery "dataset.table" to upload results to.') + argp.add_argument('--category', + choices=['smoketest','all','scalable','sweep'], + default='all', + help='Select a category of tests to run.') + argp.add_argument('--netperf', + default=False, + action='store_const', + const=True, + help='Run netperf benchmark as one of the scenarios.') + argp.add_argument('--server_cpu_load', + default=0, type=int, + help='Select a targeted server cpu load to run. 0 means ignore this flag') + argp.add_argument('-x', '--xml_report', default='report.xml', type=str, + help='Name of XML report file to generate.') + argp.add_argument('--perf_args', + help=('Example usage: "--perf_args=record -F 99 -g". ' + 'Wrap QPS workers in a perf command ' + 'with the arguments to perf specified here. ' + '".svg" flame graph profiles will be ' + 'created for each Qps Worker on each scenario. ' + 'Files will output to "<repo_root>/<args.flame_graph_reports>" ' + 'directory. Output files from running the worker ' + 'under perf are saved in the repo root where its ran. ' + 'Note that the perf "-g" flag is necessary for ' + 'flame graphs generation to work (assuming the binary ' + 'being profiled uses frame pointers, check out ' + '"--call-graph dwarf" option using libunwind otherwise.) ' + 'Also note that the entire "--perf_args=<arg(s)>" must ' + 'be wrapped in quotes as in the example usage. ' + 'If the "--perg_args" is unspecified, "perf" will ' + 'not be used at all. ' + 'See http://www.brendangregg.com/perf.html ' + 'for more general perf examples.')) + argp.add_argument('--skip_generate_flamegraphs', + default=False, + action='store_const', + const=True, + help=('Turn flame graph generation off. ' + 'May be useful if "perf_args" arguments do not make sense for ' + 'generating flamegraphs (e.g., "--perf_args=stat ...")')) + argp.add_argument('-f', '--flame_graph_reports', default='perf_reports', type=str, + help='Name of directory to output flame graph profiles to, if any are created.') + + args = argp.parse_args() + + languages = set(scenario_config.LANGUAGES[l] + for l in itertools.chain.from_iterable( + six.iterkeys(scenario_config.LANGUAGES) if x == 'all' + else [x] for x in args.language)) + + + # Put together set of remote hosts where to run and build + remote_hosts = set() + if args.remote_worker_host: + for host in args.remote_worker_host: + remote_hosts.add(host) + if args.remote_driver_host: + remote_hosts.add(args.remote_driver_host) + + if not args.dry_run: + if remote_hosts: + archive_repo(languages=[str(l) for l in languages]) + prepare_remote_hosts(remote_hosts, prepare_local=True) + else: + prepare_remote_hosts([], prepare_local=True) + + build_local = False + if not args.remote_driver_host: + build_local = True + if not args.dry_run: + build_on_remote_hosts(remote_hosts, languages=[str(l) for l in languages], build_local=build_local) + + perf_cmd = None + if args.perf_args: + print('Running workers under perf profiler') + # Expect /usr/bin/perf to be installed here, as is usual + perf_cmd = ['/usr/bin/perf'] + perf_cmd.extend(re.split('\s+', args.perf_args)) + + qpsworker_jobs = create_qpsworkers(languages, args.remote_worker_host, perf_cmd=perf_cmd) + + # get list of worker addresses for each language. + workers_by_lang = dict([(str(language), []) for language in languages]) + for job in qpsworker_jobs: + workers_by_lang[str(job.language)].append(job) + + scenarios = create_scenarios(languages, + workers_by_lang=workers_by_lang, + remote_host=args.remote_driver_host, + regex=args.regex, + category=args.category, + bq_result_table=args.bq_result_table, + netperf=args.netperf, + netperf_hosts=args.remote_worker_host, + server_cpu_load=args.server_cpu_load) + + if not scenarios: + raise Exception('No scenarios to run') + + total_scenario_failures = 0 + qps_workers_killed = 0 + merged_resultset = {} + perf_report_failures = 0 + + for scenario in scenarios: + if args.dry_run: + print(scenario.name) + else: + scenario_failures = 0 + try: + for worker in scenario.workers: + worker.start() + jobs = [scenario.jobspec] + if scenario.workers: + jobs.append(create_quit_jobspec(scenario.workers, remote_host=args.remote_driver_host)) + scenario_failures, resultset = jobset.run(jobs, newline_on_success=True, maxjobs=1, clear_alarms=False) + total_scenario_failures += scenario_failures + merged_resultset = dict(itertools.chain(six.iteritems(merged_resultset), + six.iteritems(resultset))) + finally: + # Consider qps workers that need to be killed as failures + qps_workers_killed += finish_qps_workers(scenario.workers, qpsworker_jobs) + + if perf_cmd and scenario_failures == 0 and not args.skip_generate_flamegraphs: + workers_and_base_names = {} + for worker in scenario.workers: + if not worker.perf_file_base_name: + raise Exception('using perf buf perf report filename is unspecified') + workers_and_base_names[worker.host_and_port] = worker.perf_file_base_name + perf_report_failures += run_collect_perf_profile_jobs(workers_and_base_names, scenario.name, args.flame_graph_reports) + + + # Still write the index.html even if some scenarios failed. + # 'profile_output_files' will only have names for scenarios that passed + if perf_cmd and not args.skip_generate_flamegraphs: + # write the index fil to the output dir, with all profiles from all scenarios/workers + report_utils.render_perf_profiling_results('%s/index.html' % args.flame_graph_reports, profile_output_files) + + report_utils.render_junit_xml_report(merged_resultset, args.xml_report, + suite_name='benchmarks') + + if total_scenario_failures > 0 or qps_workers_killed > 0: + print('%s scenarios failed and %s qps worker jobs killed' % (total_scenario_failures, qps_workers_killed)) + sys.exit(1) -argp = argparse.ArgumentParser(description='Run performance tests.') -argp.add_argument('-l', '--language', - choices=['all'] + sorted(scenario_config.LANGUAGES.keys()), - nargs='+', - required=True, - help='Languages to benchmark.') -argp.add_argument('--remote_driver_host', - default=None, - help='Run QPS driver on given host. By default, QPS driver is run locally.') -argp.add_argument('--remote_worker_host', - nargs='+', - default=[], - help='Worker hosts where to start QPS workers.') -argp.add_argument('--dry_run', - default=False, - action='store_const', - const=True, - help='Just list scenarios to be run, but don\'t run them.') -argp.add_argument('-r', '--regex', default='.*', type=str, - help='Regex to select scenarios to run.') -argp.add_argument('--bq_result_table', default=None, type=str, - help='Bigquery "dataset.table" to upload results to.') -argp.add_argument('--category', - choices=['smoketest','all','scalable','sweep'], - default='all', - help='Select a category of tests to run.') -argp.add_argument('--netperf', - default=False, - action='store_const', - const=True, - help='Run netperf benchmark as one of the scenarios.') -argp.add_argument('--server_cpu_load', - default=0, type=int, - help='Select a targeted server cpu load to run. 0 means ignore this flag') -argp.add_argument('-x', '--xml_report', default='report.xml', type=str, - help='Name of XML report file to generate.') -argp.add_argument('--perf_args', - help=('Example usage: "--perf_args=record -F 99 -g". ' - 'Wrap QPS workers in a perf command ' - 'with the arguments to perf specified here. ' - '".svg" flame graph profiles will be ' - 'created for each Qps Worker on each scenario. ' - 'Files will output to "<repo_root>/<args.flame_graph_reports>" ' - 'directory. Output files from running the worker ' - 'under perf are saved in the repo root where its ran. ' - 'Note that the perf "-g" flag is necessary for ' - 'flame graphs generation to work (assuming the binary ' - 'being profiled uses frame pointers, check out ' - '"--call-graph dwarf" option using libunwind otherwise.) ' - 'Also note that the entire "--perf_args=<arg(s)>" must ' - 'be wrapped in quotes as in the example usage. ' - 'If the "--perg_args" is unspecified, "perf" will ' - 'not be used at all. ' - 'See http://www.brendangregg.com/perf.html ' - 'for more general perf examples.')) -argp.add_argument('--skip_generate_flamegraphs', - default=False, - action='store_const', - const=True, - help=('Turn flame graph generation off. ' - 'May be useful if "perf_args" arguments do not make sense for ' - 'generating flamegraphs (e.g., "--perf_args=stat ...")')) -argp.add_argument('-f', '--flame_graph_reports', default='perf_reports', type=str, - help='Name of directory to output flame graph profiles to, if any are created.') - -args = argp.parse_args() - -languages = set(scenario_config.LANGUAGES[l] - for l in itertools.chain.from_iterable( - six.iterkeys(scenario_config.LANGUAGES) if x == 'all' - else [x] for x in args.language)) - - -# Put together set of remote hosts where to run and build -remote_hosts = set() -if args.remote_worker_host: - for host in args.remote_worker_host: - remote_hosts.add(host) -if args.remote_driver_host: - remote_hosts.add(args.remote_driver_host) - -if not args.dry_run: - if remote_hosts: - archive_repo(languages=[str(l) for l in languages]) - prepare_remote_hosts(remote_hosts, prepare_local=True) - else: - prepare_remote_hosts([], prepare_local=True) - -build_local = False -if not args.remote_driver_host: - build_local = True -if not args.dry_run: - build_on_remote_hosts(remote_hosts, languages=[str(l) for l in languages], build_local=build_local) - -perf_cmd = None -if args.perf_args: - print('Running workers under perf profiler') - # Expect /usr/bin/perf to be installed here, as is usual - perf_cmd = ['/usr/bin/perf'] - perf_cmd.extend(re.split('\s+', args.perf_args)) - -qpsworker_jobs = create_qpsworkers(languages, args.remote_worker_host, perf_cmd=perf_cmd) - -# get list of worker addresses for each language. -workers_by_lang = dict([(str(language), []) for language in languages]) -for job in qpsworker_jobs: - workers_by_lang[str(job.language)].append(job) - -scenarios = create_scenarios(languages, - workers_by_lang=workers_by_lang, - remote_host=args.remote_driver_host, - regex=args.regex, - category=args.category, - bq_result_table=args.bq_result_table, - netperf=args.netperf, - netperf_hosts=args.remote_worker_host, - server_cpu_load=args.server_cpu_load) - -if not scenarios: - raise Exception('No scenarios to run') - -total_scenario_failures = 0 -qps_workers_killed = 0 -merged_resultset = {} -perf_report_failures = 0 - -for scenario in scenarios: - if args.dry_run: - print(scenario.name) - else: - scenario_failures = 0 - try: - for worker in scenario.workers: - worker.start() - jobs = [scenario.jobspec] - if scenario.workers: - jobs.append(create_quit_jobspec(scenario.workers, remote_host=args.remote_driver_host)) - scenario_failures, resultset = jobset.run(jobs, newline_on_success=True, maxjobs=1, clear_alarms=False) - total_scenario_failures += scenario_failures - merged_resultset = dict(itertools.chain(six.iteritems(merged_resultset), - six.iteritems(resultset))) - finally: - # Consider qps workers that need to be killed as failures - qps_workers_killed += finish_qps_workers(scenario.workers) - - if perf_cmd and scenario_failures == 0 and not args.skip_generate_flamegraphs: - workers_and_base_names = {} - for worker in scenario.workers: - if not worker.perf_file_base_name: - raise Exception('using perf buf perf report filename is unspecified') - workers_and_base_names[worker.host_and_port] = worker.perf_file_base_name - perf_report_failures += run_collect_perf_profile_jobs(workers_and_base_names, scenario.name) - - -# Still write the index.html even if some scenarios failed. -# 'profile_output_files' will only have names for scenarios that passed -if perf_cmd and not args.skip_generate_flamegraphs: - # write the index fil to the output dir, with all profiles from all scenarios/workers - report_utils.render_perf_profiling_results('%s/index.html' % args.flame_graph_reports, profile_output_files) - -report_utils.render_junit_xml_report(merged_resultset, args.xml_report, - suite_name='benchmarks') - -if total_scenario_failures > 0 or qps_workers_killed > 0: - print('%s scenarios failed and %s qps worker jobs killed' % (total_scenario_failures, qps_workers_killed)) - sys.exit(1) - -if perf_report_failures > 0: - print('%s perf profile collection jobs failed' % perf_report_failures) - sys.exit(1) + if perf_report_failures > 0: + print('%s perf profile collection jobs failed' % perf_report_failures) + sys.exit(1) + +if __name__ == "__main__": + main() |