chromium/cc/metrics/scroll_jank_dropped_frame_tracker.cc

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/metrics/scroll_jank_dropped_frame_tracker.h"

#include <algorithm>

#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/notreached.h"
#include "base/strings/strcat.h"
#include "base/trace_event/common/trace_event_common.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/trace_id_helper.h"
#include "base/trace_event/typed_macros.h"

namespace cc {

namespace {
enum class PerScrollHistogramType { … };

// Histogram min, max and no. of buckets.
constexpr int kVsyncCountsMin = …;
constexpr int kVsyncCountsMax = …;
constexpr int kVsyncCountsBuckets = …;

const char* GetPerScrollHistogramName(int num_frames,
                                      PerScrollHistogramType type) { … }

const char* GetPerVsyncScrollHistogramName(int num_vsyncs,
                                           PerScrollHistogramType type) { … }
}  // namespace

ScrollJankDroppedFrameTracker::ScrollJankDroppedFrameTracker() { … }

ScrollJankDroppedFrameTracker::~ScrollJankDroppedFrameTracker() { … }

void ScrollJankDroppedFrameTracker::EmitPerScrollHistogramsAndResetCounters() { … }

void ScrollJankDroppedFrameTracker::
    EmitPerScrollVsyncHistogramsAndResetCounters() { … }

void ScrollJankDroppedFrameTracker::EmitPerWindowHistogramsAndResetCounters() { … }

// TODO(b/306611560): Cleanup experimental per vsync metric or promote to
// default.
void ScrollJankDroppedFrameTracker::
    EmitPerVsyncWindowHistogramsAndResetCounters() { … }

void ScrollJankDroppedFrameTracker::ReportLatestPresentationData(
    ScrollUpdateEventMetrics& earliest_event,
    base::TimeTicks last_input_generation_ts,
    base::TimeTicks presentation_ts,
    base::TimeDelta vsync_interval) { … }

void ScrollJankDroppedFrameTracker::OnScrollStarted() { … }

}  // namespace cc