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// 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 "cc/trees/proxy_timing_history.h"
const size_t kDurationHistorySize = 60;
const double kCommitAndActivationDurationEstimationPercentile = 50.0;
const double kDrawDurationEstimationPercentile = 100.0;
const int kDrawDurationEstimatePaddingInMicroseconds = 0;
namespace cc {
ProxyTimingHistory::ProxyTimingHistory()
: draw_duration_history_(kDurationHistorySize),
begin_main_frame_to_commit_duration_history_(kDurationHistorySize),
commit_to_activate_duration_history_(kDurationHistorySize) {}
ProxyTimingHistory::~ProxyTimingHistory() {}
base::TimeDelta ProxyTimingHistory::DrawDurationEstimate() const {
base::TimeDelta historical_estimate =
draw_duration_history_.Percentile(kDrawDurationEstimationPercentile);
base::TimeDelta padding = base::TimeDelta::FromMicroseconds(
kDrawDurationEstimatePaddingInMicroseconds);
return historical_estimate + padding;
}
base::TimeDelta ProxyTimingHistory::BeginMainFrameToCommitDurationEstimate()
const {
return begin_main_frame_to_commit_duration_history_.Percentile(
kCommitAndActivationDurationEstimationPercentile);
}
base::TimeDelta ProxyTimingHistory::CommitToActivateDurationEstimate() const {
return commit_to_activate_duration_history_.Percentile(
kCommitAndActivationDurationEstimationPercentile);
}
void ProxyTimingHistory::DidBeginMainFrame() {
begin_main_frame_sent_time_ = base::TimeTicks::HighResNow();
}
void ProxyTimingHistory::DidCommit() {
commit_complete_time_ = base::TimeTicks::HighResNow();
begin_main_frame_to_commit_duration_history_.InsertSample(
commit_complete_time_ - begin_main_frame_sent_time_);
}
void ProxyTimingHistory::DidActivatePendingTree() {
commit_to_activate_duration_history_.InsertSample(
base::TimeTicks::HighResNow() - commit_complete_time_);
}
void ProxyTimingHistory::DidStartDrawing() {
start_draw_time_ = base::TimeTicks::HighResNow();
}
base::TimeDelta ProxyTimingHistory::DidFinishDrawing() {
base::TimeDelta draw_duration =
base::TimeTicks::HighResNow() - start_draw_time_;
draw_duration_history_.InsertSample(draw_duration);
return draw_duration;
}
} // namespace cc
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