base/threading: measure event wait times

base/threading/platform_thread_posix.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/threading/platform_thread.h"
 
 #include <errno.h>
 #include <pthread.h>
 #include <sched.h>
 #include <sys/resource.h>
 #include <sys/time.h>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread_internal_posix.h"
 #include "base/threading/thread_id_name_manager.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/tracked_objects.h"
 
 #if defined(OS_LINUX)
 #include <sys/syscall.h>
 #elif defined(OS_ANDROID)
 #include <sys/types.h>
@@ skipping 93 matching lines @@
     // Value of |handle| is undefined if pthread_create fails.
     handle = 0;
     errno = err;
     PLOG(ERROR) << "pthread_create";
   }
 
   pthread_attr_destroy(&attributes);
 
   // Don't let this call complete until the thread id
   // is set in the handle.
-  if (success)
+  if (success) {
+    // TODO(toyoshim): Remove this after a few days (crbug.com/495097)
+    tracked_objects::ScopedTracker tracking_profile(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(
+            "495097 pthread_create and handle_set.Wait"));
     params.handle_set.Wait();
+  }
   CHECK_EQ(handle, thread_handle->platform_handle());
 
   return success;
 }
 
 }  // namespace
 
 // static
 PlatformThreadId PlatformThread::CurrentId() {
   // Pthreads doesn't have the concept of a thread ID, so we have to reach down
@@ skipping 127 matching lines @@
     return ThreadPriority::NORMAL;
   }
 
   return internal::NiceValueToThreadPriority(nice_value);
 #endif  // !defined(OS_NACL)
 }
 
 #endif  // !defined(OS_MACOSX)
 
 }  // namespace base