Microbenchmark for the cost of posting tasks to different pump types

base/threading/thread_perftest.cc

 // Copyright 2014 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/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/format_macros.h"

[darin (slow to review), 2014/09/28 03:42:20]

nit: are these includes needed?

 #include "base/memory/scoped_vector.h"
+#include "base/strings/stringprintf.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/perf/perf_test.h"
 
 #if defined(OS_POSIX)
@@ skipping 233 matching lines @@
   base::ConditionVariable cond_;
   bool signaled_;
 };
 
 // This is meant to test the absolute minimal context switching time
 // using our own base synchronization code.
 typedef EventPerfTest<ConditionVariableEvent> ConditionVariablePerfTest;
 TEST_F(ConditionVariablePerfTest, EventPingPong) {
   RunPingPongTest("4_ConditionVariable_Threads", 4);
 }
-
 #if defined(OS_POSIX)
 
 // Absolutely 100% minimal posix waitable event. If there is a better/faster
 // way to force a context switch, we should use that instead.
 class PthreadEvent {
  public:
   PthreadEvent(bool manual_reset, bool initially_signaled) {
     DCHECK(!manual_reset);
     DCHECK(!initially_signaled);
     pthread_mutex_init(&mutex_, 0);
@@ skipping 32 matching lines @@
 typedef EventPerfTest<PthreadEvent> PthreadEventPerfTest;
 TEST_F(PthreadEventPerfTest, EventPingPong) {
   RunPingPongTest("4_PthreadCondVar_Threads", 4);
 }
 
 #endif
 
 }  // namespace
 
 }  // namespace base