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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef PerfStats_h
#define PerfStats_h
#include "mozilla/TimeStamp.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/MozPromise.h"
#include <memory>
#include <string>
#include <limits>
namespace mozilla {
class PerfStats {
public:
typedef MozPromise<nsCString, bool, true> PerfStatsPromise;
enum class Metric : uint32_t {
DisplayListBuilding = 0,
Rasterizing,
LayerBuilding,
LayerTransactions,
Compositing,
Reflowing,
Styling,
Max
};
// MetricMask is a bitmask based on 'Metric', i.e. Metric::LayerBuilding (2)
// is synonymous to 1 << 2 in MetricMask.
using MetricMask = uint64_t;
static void RecordMeasurementStart(Metric aMetric) {
if (!(sCollectionMask & (1 << static_cast<uint64_t>(aMetric)))) {
return;
}
RecordMeasurementStartInternal(aMetric);
}
static void RecordMeasurementEnd(Metric aMetric) {
if (!(sCollectionMask & (1 << static_cast<uint64_t>(aMetric)))) {
return;
}
RecordMeasurementEndInternal(aMetric);
}
template <Metric N>
class AutoMetricRecording {
public:
AutoMetricRecording() { PerfStats::RecordMeasurementStart(N); }
~AutoMetricRecording() { PerfStats::RecordMeasurementEnd(N); }
};
static void SetCollectionMask(MetricMask aMask);
static RefPtr<PerfStatsPromise> CollectPerfStatsJSON() {
return GetSingleton()->CollectPerfStatsJSONInternal();
}
static nsCString CollectLocalPerfStatsJSON() {
return GetSingleton()->CollectLocalPerfStatsJSONInternal();
}
private:
static PerfStats* GetSingleton();
static void RecordMeasurementStartInternal(Metric aMetric);
static void RecordMeasurementEndInternal(Metric aMetric);
RefPtr<PerfStatsPromise> CollectPerfStatsJSONInternal();
nsCString CollectLocalPerfStatsJSONInternal();
static MetricMask sCollectionMask;
static StaticMutex sMutex;
static StaticAutoPtr<PerfStats> sSingleton;
TimeStamp mRecordedStarts[static_cast<size_t>(Metric::Max)];
double mRecordedTimes[static_cast<size_t>(Metric::Max)];
};
static_assert(1 << (static_cast<uint64_t>(PerfStats::Metric::Max) - 1) <=
std::numeric_limits<PerfStats::MetricMask>::max(),
"More metrics than can fit into sCollectionMask bitmask");
} // namespace mozilla
#endif // PerfStats_h
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