cc/debug/frame_timing_tracker.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/debug/frame_timing_tracker.h"
   6
   7 #include <algorithm>
   8 #include <limits>
   9
  10 #include "base/metrics/histogram.h"
  11 #include "cc/trees/layer_tree_host_impl.h"
  12 #include "cc/trees/proxy.h"
  13
  14 namespace cc {
  15 namespace {
  16 int kSendTimingIntervalMS = 200;
  17 }
  18
  19 FrameTimingTracker::CompositeTimingEvent::CompositeTimingEvent(
  20     int _frame_id,
  21     base::TimeTicks _timestamp)
  22     : frame_id(_frame_id), timestamp(_timestamp) {
  23 }
  24
  25 FrameTimingTracker::CompositeTimingEvent::~CompositeTimingEvent() {
  26 }
  27
  28 FrameTimingTracker::MainFrameTimingEvent::MainFrameTimingEvent(
  29     int frame_id,
  30     base::TimeTicks timestamp,
  31     base::TimeTicks end_time)
  32     : frame_id(frame_id), timestamp(timestamp), end_time(end_time) {
  33 }
  34
  35 FrameTimingTracker::MainFrameTimingEvent::~MainFrameTimingEvent() {
  36 }
  37
  38 // static
  39 scoped_ptr<FrameTimingTracker> FrameTimingTracker::Create(
  40     LayerTreeHostImpl* layer_tree_host_impl) {
  41   return make_scoped_ptr(new FrameTimingTracker(layer_tree_host_impl));
  42 }
  43
  44 FrameTimingTracker::FrameTimingTracker(LayerTreeHostImpl* layer_tree_host_impl)
  45     : layer_tree_host_impl_(layer_tree_host_impl),
  46       post_events_notifier_(
  47           layer_tree_host_impl_->proxy()->HasImplThread()
  48               ? layer_tree_host_impl_->proxy()->ImplThreadTaskRunner()
  49               : layer_tree_host_impl_->proxy()->MainThreadTaskRunner(),
  50           base::Bind(&FrameTimingTracker::PostEvents, base::Unretained(this)),
  51           base::TimeDelta::FromMilliseconds(kSendTimingIntervalMS)) {
  52 }
  53
  54 FrameTimingTracker::~FrameTimingTracker() {
  55 }
  56
  57 void FrameTimingTracker::SaveTimeStamps(
  58     base::TimeTicks timestamp,
  59     const std::vector<FrameAndRectIds>& frame_ids) {
  60   if (!composite_events_)
  61     composite_events_.reset(new CompositeTimingSet);
  62   for (const auto& pair : frame_ids) {
  63     (*composite_events_)[pair.second].push_back(
  64         CompositeTimingEvent(pair.first, timestamp));
  65   }
  66   if (!post_events_notifier_.HasPendingNotification())
  67     post_events_notifier_.Schedule();
  68 }
  69
  70 void FrameTimingTracker::SaveMainFrameTimeStamps(
  71     const std::vector<int64_t>& request_ids,
  72     base::TimeTicks main_frame_time,
  73     base::TimeTicks end_time,
  74     int source_frame_number) {
  75   if (!main_frame_events_)
  76     main_frame_events_.reset(new MainFrameTimingSet);
  77   for (const auto& request : request_ids) {
  78     std::vector<MainFrameTimingEvent>& events = (*main_frame_events_)[request];
  79     events.push_back(
  80         MainFrameTimingEvent(source_frame_number, main_frame_time, end_time));
  81   }
  82   if (!post_events_notifier_.HasPendingNotification())
  83     post_events_notifier_.Schedule();
  84 }
  85
  86 scoped_ptr<FrameTimingTracker::CompositeTimingSet>
  87 FrameTimingTracker::GroupCompositeCountsByRectId() {
  88   if (!composite_events_)
  89     return make_scoped_ptr(new CompositeTimingSet);
  90   for (auto& infos : *composite_events_) {
  91     std::sort(
  92         infos.second.begin(), infos.second.end(),
  93         [](const CompositeTimingEvent& lhs, const CompositeTimingEvent& rhs) {
  94           return lhs.timestamp < rhs.timestamp;
  95         });
  96   }
  97   return composite_events_.Pass();
  98 }
  99
 100 scoped_ptr<FrameTimingTracker::MainFrameTimingSet>
 101 FrameTimingTracker::GroupMainFrameCountsByRectId() {
 102   if (!main_frame_events_)
 103     return make_scoped_ptr(new MainFrameTimingSet);
 104   for (auto& infos : *main_frame_events_) {
 105     std::sort(
 106         infos.second.begin(), infos.second.end(),
 107         [](const MainFrameTimingEvent& lhs, const MainFrameTimingEvent& rhs) {
 108           return lhs.timestamp < rhs.timestamp;
 109         });
 110   }
 111   return main_frame_events_.Pass();
 112 }
 113
 114 void FrameTimingTracker::PostEvents() {
 115   layer_tree_host_impl_->PostFrameTimingEvents(GroupCompositeCountsByRectId(),
 116                                                GroupMainFrameCountsByRectId());
 117 }
 118
 119 }  // namespace cc