Add performance tracing for PlatformThread and parts of the video code.

webrtc/base/platform_thread.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/base/platform_thread.h"
 
 #include "webrtc/base/atomicops.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/timeutils.h"
+#include "webrtc/base/trace_event.h"
 
 #if defined(WEBRTC_LINUX)
 #include <sys/prctl.h>
 #include <sys/syscall.h>
 #endif
 
 namespace rtc {
 
 PlatformThreadId CurrentThreadId() {
   PlatformThreadId ret;
@@ skipping 202 matching lines @@
   // |kMaxLoopCount| controls the limit for how many times we allow the loop
   // to run within a period, before DCHECKing.
   // |kPeriodToMeasureMs| controls how long that period is.
   static const int kMaxLoopCount = 1000;
   static const int kPeriodToMeasureMs = 100;
   int64_t loop_stamps[kMaxLoopCount] = {};
   int64_t sequence_nr = 0;
 #endif
 
   do {
+    TRACE_EVENT1("webrtc", "PlatformThread::Run", "name", name_.c_str());
+
     // The interface contract of Start/Stop is that for a successful call to
     // Start, there should be at least one call to the run function.  So we
     // call the function before checking |stop_|.
     if (!run_function_deprecated_(obj_))
       break;
 #if RTC_DCHECK_IS_ON
     auto id = sequence_nr % kMaxLoopCount;
     loop_stamps[id] = rtc::TimeMillis();
     if (sequence_nr > kMaxLoopCount) {
       auto compare_id = (id + 1) % kMaxLoopCount;
@@ skipping 91 matching lines @@
 #if defined(WEBRTC_WIN)
 bool PlatformThread::QueueAPC(PAPCFUNC function, ULONG_PTR data) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   RTC_DCHECK(IsRunning());
 
   return QueueUserAPC(function, thread_, data) != FALSE;
 }
 #endif
 
 }  // namespace rtc