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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/. */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "nsCycleCollector.h"
#include "nsDebug.h"
#include "CycleCollectorStats.h"
#include "MainThreadUtils.h"
#include "mozilla/BaseProfilerMarkersPrerequisites.h"
#include "mozilla/ProfilerMarkers.h"
#include "mozilla/glean/XpcomMetrics.h"
#include "mozilla/TimeStamp.h"
using namespace mozilla;
mozilla::CycleCollectorStats::CycleCollectorStats() {
char* env = getenv("MOZ_CCTIMER");
if (!env) {
return;
}
if (strcmp(env, "none") == 0) {
mFile = nullptr;
} else if (strcmp(env, "stdout") == 0) {
mFile = stdout;
} else if (strcmp(env, "stderr") == 0) {
mFile = stderr;
} else {
mFile = fopen(env, "a");
if (!mFile) {
NS_WARNING("Failed to open MOZ_CCTIMER log file.");
}
}
}
void mozilla::CycleCollectorStats::Clear() {
if (mFile && mFile != stdout && mFile != stderr) {
fclose(mFile);
}
*this = CycleCollectorStats();
}
MOZ_ALWAYS_INLINE
static TimeDuration TimeBetween(TimeStamp aStart, TimeStamp aEnd) {
MOZ_ASSERT(aEnd >= aStart);
return aEnd - aStart;
}
static TimeDuration TimeUntilNow(TimeStamp start) {
if (start.IsNull()) {
return TimeDuration();
}
return TimeBetween(start, TimeStamp::Now());
}
namespace geckoprofiler::markers {
class CCSliceMarker : public BaseMarkerType<CCSliceMarker> {
public:
static constexpr const char* Name = "CCSlice";
static constexpr const char* Description =
"Information for an individual CC slice.";
using MS = MarkerSchema;
static constexpr MS::PayloadField PayloadFields[] = {
{"idle", MS::InputType::Boolean, "Idle", MS::Format::Integer}};
static constexpr MS::Location Locations[] = {MS::Location::MarkerChart,
MS::Location::MarkerTable,
MS::Location::TimelineMemory};
static constexpr const char* AllLabels =
"{marker.name} (idle={marker.data.idle})";
static constexpr MS::ETWMarkerGroup Group = MS::ETWMarkerGroup::Memory;
static void StreamJSONMarkerData(
mozilla::baseprofiler::SpliceableJSONWriter& aWriter,
bool aIsDuringIdle) {
StreamJSONMarkerDataImpl(aWriter, aIsDuringIdle);
}
};
} // namespace geckoprofiler::markers
void mozilla::CycleCollectorStats::AfterCycleCollectionSlice() {
// The meaning of the telemetry is specific to the main thread. No worker
// should be calling this method. (And workers currently do not have
// incremental CC, so the profiler marker is not needed either.)
MOZ_ASSERT(NS_IsMainThread());
if (mBeginSliceTime.IsNull()) {
// We already called this method from EndCycleCollectionCallback for this
// slice.
return;
}
mEndSliceTime = TimeStamp::Now();
TimeDuration duration = mEndSliceTime - mBeginSliceTime;
PROFILER_MARKER(
"CCSlice", GCCC, MarkerTiming::Interval(mBeginSliceTime, mEndSliceTime),
CCSliceMarker, !mIdleDeadline.IsNull() && mIdleDeadline >= mEndSliceTime);
if (duration.ToSeconds()) {
TimeDuration idleDuration;
if (!mIdleDeadline.IsNull()) {
if (mIdleDeadline < mEndSliceTime) {
// This slice overflowed the idle period.
if (mIdleDeadline > mBeginSliceTime) {
idleDuration = mIdleDeadline - mBeginSliceTime;
}
} else {
idleDuration = duration;
}
}
uint32_t percent =
uint32_t(idleDuration.ToSeconds() / duration.ToSeconds() * 100);
glean::cycle_collector::slice_during_idle.AccumulateSingleSample(percent);
}
TimeDuration sliceTime = TimeBetween(mBeginSliceTime, mEndSliceTime);
mMaxSliceTime = std::max(mMaxSliceTime, sliceTime);
mMaxSliceTimeSinceClear = std::max(mMaxSliceTimeSinceClear, sliceTime);
mTotalSliceTime += sliceTime;
mBeginSliceTime = TimeStamp();
}
void mozilla::CycleCollectorStats::PrepareForCycleCollection(TimeStamp aNow) {
mBeginTime = aNow;
mSuspected = nsCycleCollector_suspectedCount();
}
void mozilla::CycleCollectorStats::AfterPrepareForCycleCollectionSlice(
TimeStamp aDeadline, TimeStamp aBeginTime, TimeStamp aMaybeAfterGCTime) {
mBeginSliceTime = aBeginTime;
mIdleDeadline = aDeadline;
if (!aMaybeAfterGCTime.IsNull()) {
mAnyLockedOut = true;
mMaxGCDuration = std::max(mMaxGCDuration, aMaybeAfterGCTime - aBeginTime);
}
}
void mozilla::CycleCollectorStats::AfterSyncForgetSkippable(
TimeStamp beginTime) {
mMaxSkippableDuration =
std::max(mMaxSkippableDuration, TimeUntilNow(beginTime));
mRanSyncForgetSkippable = true;
}
void mozilla::CycleCollectorStats::AfterForgetSkippable(
mozilla::TimeStamp aStartTime, mozilla::TimeStamp aEndTime,
uint32_t aRemovedPurples, bool aInIdle) {
mozilla::TimeDuration duration = aEndTime - aStartTime;
if (!mMinForgetSkippableTime || mMinForgetSkippableTime > duration) {
mMinForgetSkippableTime = duration;
}
if (!mMaxForgetSkippableTime || mMaxForgetSkippableTime < duration) {
mMaxForgetSkippableTime = duration;
}
mTotalForgetSkippableTime += duration;
++mForgetSkippableBeforeCC;
mRemovedPurples += aRemovedPurples;
PROFILER_MARKER("ForgetSkippable", GCCC,
MarkerTiming::IntervalUntilNowFrom(aStartTime), CCSliceMarker,
aInIdle);
}
void mozilla::CycleCollectorStats::SendTelemetry(TimeDuration aCCNowDuration,
TimeStamp aPrevCCEnd) const {
// Many of the telemetry measures would not make sense off the main thread (on
// workers), and even for those that do, we don't want to mix mainthread and
// other threads' measures.
MOZ_ASSERT(NS_IsMainThread());
glean::cycle_collector::finish_igc
.EnumGet(
static_cast<glean::cycle_collector::FinishIgcLabel>(mAnyLockedOut))
.Add();
glean::cycle_collector::sync_skippable
.EnumGet(static_cast<glean::cycle_collector::SyncSkippableLabel>(
mRanSyncForgetSkippable))
.Add();
glean::cycle_collector::full.AccumulateRawDuration(aCCNowDuration);
glean::cycle_collector::max_pause.AccumulateRawDuration(mMaxSliceTime);
if (!aPrevCCEnd.IsNull()) {
TimeDuration timeBetween = TimeBetween(aPrevCCEnd, mBeginTime);
glean::cycle_collector::time_between.AccumulateRawDuration(timeBetween);
}
glean::cycle_collector::forget_skippable_max.AccumulateRawDuration(
mMaxForgetSkippableTime);
}
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