Merge pull request #1408 from dgquintas/stap

Integration of Systemtap as a profiling mechanism.

3 files changed, 84 insertions, 2 deletions

diff --git a/test/build/systemtap.c b/test/build/systemtap.c
new file mode 100644
index 0000000000..66ff38ebd6
--- /dev/null
+++ b/test/build/systemtap.c
@@ -0,0 +1,42 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <sys/sdt.h>
+
+#ifndef _SYS_SDT_H
+#error "_SYS_SDT_H not defined, despite <sys/sdt.h> being present."
+#endif
+
+int main() {
+  return 0;
+}
diff --git a/test/core/profiling/mark_timings.stp b/test/core/profiling/mark_timings.stp
new file mode 100644
index 0000000000..0c0a417faf
--- /dev/null
+++ b/test/core/profiling/mark_timings.stp
@@ -0,0 +1,40 @@
+/* This script requires a command line argument, to be used in the "process"
+ * probe definition.
+ *
+ * For a statically build binary, that'd be the name of the binary itself.
+ * For dinamically built ones, point to the location of the libgprc.so being
+ * used. */
+
+global starts, times, times_per_tag
+
+probe process(@1).mark("timing_ns_begin") {
+  starts[$arg1, tid()] = gettimeofday_ns();
+}
+
+probe process(@1).mark("timing_ns_end") {
+  tag = $arg1
+  t = gettimeofday_ns();
+  if (s = starts[tag, tid()]) {
+     times[tag, tid()] <<< t-s;
+     delete starts[tag, tid()];
+  }
+}
+
+probe end {
+  printf("%15s %9s %10s %10s %10s %10s\n", "tag", "tid", "count",
+    "min(ns)", "avg(ns)", "max(ns)");
+  foreach ([tag+, tid] in times) {
+    printf("%15X %9d %10d %10d %10d %10d\n", tag, tid, @count(times[tag, tid]),
+          @min(times[tag, tid]), @avg(times[tag, tid]), @max(times[tag, tid]));
+  }
+
+  printf("Per tag average of averages\n");
+  foreach ([tag+, tid] in times) {
+    times_per_tag[tag] <<< @avg(times[tag, tid]);
+  }
+  printf("%15s %10s %10s\n", "tag", "count", "avg(ns)");
+  foreach ([tag+] in times_per_tag) {
+    printf("%15X %10d %10d\n", tag, @count(times_per_tag[tag]),
+                                    @avg(times_per_tag[tag]));
+  }
+}
diff --git a/test/core/profiling/timers_test.c b/test/core/profiling/timers_test.c
index 55e59c969e..12b08c115e 100644
--- a/test/core/profiling/timers_test.c
+++ b/test/core/profiling/timers_test.c
@@ -76,8 +76,8 @@ void test_log_events(int num_seqs) {
 
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
-  grpc_timers_log_global_init();
+  grpc_timers_global_init();
   test_log_events(1000000);
-  grpc_timers_log_global_destroy();
+  grpc_timers_global_destroy();
   return 0;
 }