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v8/test/unittests/heap/gc-tracer-unittest.cc
Nikolaos Papaspyrou ae0480a01b heap: Inline GCTracer::Scope constructor and destructor 
Tracer scopes are used in numerous places in src/heap to track time
spent during various phases of the garbage collection. Usually, they
are introduced with the TRACE_GC* family of macros, taking the scope
identifier as a parameter. At most call sites, the scope identifier is
known at compile time.

This CL inlines the constructor and destructor of GCTracer::Scope, in
order to enable the C++ compiler to properly optimize the introduction
of such scopes when the scope identifier is known at compile time,
using constant propagation. This is expected to have a performance
impact for short-lived and frequently used scopes, e.g., in incremental
marking and sweeping steps.

Change-Id: I6f1a2954a437de1fa6dab5e464c20c952d84ffd4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3581774
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Nikolaos Papaspyrou <nikolaos@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79957}
2022-04-13 13:17:39 +00:00

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// Copyright 2014 the V8 project 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 "src/heap/gc-tracer.h"
#include <cmath>
#include <limits>
#include "src/base/platform/platform.h"
#include "src/common/globals.h"
#include "src/execution/isolate.h"
#include "src/heap/gc-tracer-inl.h"
#include "test/unittests/test-utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace v8 {
namespace internal {
using GCTracerTest = TestWithContext;
TEST(GCTracer, AverageSpeed) {
base::RingBuffer<BytesAndDuration> buffer;
EXPECT_EQ(100 / 2,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 0));
buffer.Push(MakeBytesAndDuration(100, 8));
EXPECT_EQ(100 / 2,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 2));
EXPECT_EQ(200 / 10,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 3));
const int max_speed = 1024 * MB;
buffer.Reset();
buffer.Push(MakeBytesAndDuration(max_speed, 0.5));
EXPECT_EQ(max_speed,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1));
const int min_speed = 1;
buffer.Reset();
buffer.Push(MakeBytesAndDuration(1, 10000));
EXPECT_EQ(min_speed,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1));
buffer.Reset();
int sum = 0;
for (int i = 0; i < buffer.kSize; i++) {
sum += i + 1;
buffer.Push(MakeBytesAndDuration(i + 1, 1));
}
EXPECT_EQ(
sum * 1.0 / buffer.kSize,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize));
buffer.Push(MakeBytesAndDuration(100, 1));
EXPECT_EQ(
(sum * 1.0 - 1 + 100) / buffer.kSize,
GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize));
}
namespace {
void SampleAndAddAllocation(GCTracer* tracer, double time_ms,
size_t per_space_counter_bytes) {
// Increment counters of all spaces.
tracer->SampleAllocation(time_ms, per_space_counter_bytes,
per_space_counter_bytes, per_space_counter_bytes);
tracer->AddAllocation(time_ms);
}
enum class StartTracingMode {
kAtomic,
kIncremental,
kIncrementalStart,
kIncrementalEnterPause,
};
void StartTracing(GCTracer* tracer, GarbageCollector collector,
StartTracingMode mode) {
DCHECK_IMPLIES(mode != StartTracingMode::kAtomic,
!Heap::IsYoungGenerationCollector(collector));
// Start the cycle for incremental marking.
if (mode == StartTracingMode::kIncremental ||
mode == StartTracingMode::kIncrementalStart) {
tracer->StartCycle(collector, GarbageCollectionReason::kTesting,
"collector unittest",
GCTracer::MarkingType::kIncremental);
}
// If just that was requested, no more to be done.
if (mode == StartTracingMode::kIncrementalStart) return;
// Else, we enter the observable pause.
tracer->StartObservablePause();
// Start an atomic GC cycle.
if (mode == StartTracingMode::kAtomic) {
tracer->StartCycle(collector, GarbageCollectionReason::kTesting,
"collector unittest", GCTracer::MarkingType::kAtomic);
}
// We enter the atomic pause.
tracer->StartAtomicPause();
// Update the current event for an incremental GC cycle.
if (mode != StartTracingMode::kAtomic) {
tracer->UpdateCurrentEvent(GarbageCollectionReason::kTesting,
"collector unittest");
}
}
void StopTracing(GCTracer* tracer, GarbageCollector collector) {
tracer->StopAtomicPause();
tracer->StopObservablePause();
tracer->UpdateStatistics(collector);
if (Heap::IsYoungGenerationCollector(collector)) {
tracer->StopYoungCycleIfNeeded();
} else {
tracer->NotifySweepingCompleted();
}
}
} // namespace
TEST_F(GCTracerTest, AllocationThroughput) {
// GCTracer::AllocationThroughputInBytesPerMillisecond ignores global memory.
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
const int time1 = 100;
const size_t counter1 = 1000;
SampleAndAddAllocation(tracer, time1, counter1);
const int time2 = 200;
const size_t counter2 = 2000;
SampleAndAddAllocation(tracer, time2, counter2);
// Will only consider the current sample.
EXPECT_EQ(2 * (counter2 - counter1) / (time2 - time1),
static_cast<size_t>(
tracer->AllocationThroughputInBytesPerMillisecond(100)));
const int time3 = 1000;
const size_t counter3 = 30000;
SampleAndAddAllocation(tracer, time3, counter3);
// Only consider last sample.
EXPECT_EQ(2 * (counter3 - counter2) / (time3 - time2),
static_cast<size_t>(
tracer->AllocationThroughputInBytesPerMillisecond(800)));
// Considers last 2 samples.
EXPECT_EQ(2 * (counter3 - counter1) / (time3 - time1),
static_cast<size_t>(
tracer->AllocationThroughputInBytesPerMillisecond(801)));
}
TEST_F(GCTracerTest, PerGenerationAllocationThroughput) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
const int time1 = 100;
const size_t counter1 = 1000;
SampleAndAddAllocation(tracer, time1, counter1);
const int time2 = 200;
const size_t counter2 = 2000;
SampleAndAddAllocation(tracer, time2, counter2);
const size_t expected_throughput1 = (counter2 - counter1) / (time2 - time1);
EXPECT_EQ(expected_throughput1,
static_cast<size_t>(
tracer->NewSpaceAllocationThroughputInBytesPerMillisecond()));
EXPECT_EQ(
expected_throughput1,
static_cast<size_t>(
tracer->OldGenerationAllocationThroughputInBytesPerMillisecond()));
EXPECT_EQ(expected_throughput1,
static_cast<size_t>(
tracer->EmbedderAllocationThroughputInBytesPerMillisecond()));
const int time3 = 1000;
const size_t counter3 = 30000;
SampleAndAddAllocation(tracer, time3, counter3);
const size_t expected_throughput2 = (counter3 - counter1) / (time3 - time1);
EXPECT_EQ(expected_throughput2,
static_cast<size_t>(
tracer->NewSpaceAllocationThroughputInBytesPerMillisecond()));
EXPECT_EQ(
expected_throughput2,
static_cast<size_t>(
tracer->OldGenerationAllocationThroughputInBytesPerMillisecond()));
EXPECT_EQ(expected_throughput2,
static_cast<size_t>(
tracer->EmbedderAllocationThroughputInBytesPerMillisecond()));
}
TEST_F(GCTracerTest, PerGenerationAllocationThroughputWithProvidedTime) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
const int time1 = 100;
const size_t counter1 = 1000;
SampleAndAddAllocation(tracer, time1, counter1);
const int time2 = 200;
const size_t counter2 = 2000;
SampleAndAddAllocation(tracer, time2, counter2);
const size_t expected_throughput1 = (counter2 - counter1) / (time2 - time1);
EXPECT_EQ(
expected_throughput1,
static_cast<size_t>(
tracer->NewSpaceAllocationThroughputInBytesPerMillisecond(100)));
EXPECT_EQ(
expected_throughput1,
static_cast<size_t>(
tracer->OldGenerationAllocationThroughputInBytesPerMillisecond(100)));
const int time3 = 1000;
const size_t counter3 = 30000;
SampleAndAddAllocation(tracer, time3, counter3);
const size_t expected_throughput2 = (counter3 - counter2) / (time3 - time2);
// Only consider last sample.
EXPECT_EQ(
expected_throughput2,
static_cast<size_t>(
tracer->NewSpaceAllocationThroughputInBytesPerMillisecond(800)));
EXPECT_EQ(
expected_throughput2,
static_cast<size_t>(
tracer->OldGenerationAllocationThroughputInBytesPerMillisecond(800)));
const size_t expected_throughput3 = (counter3 - counter1) / (time3 - time1);
// Consider last two samples.
EXPECT_EQ(
expected_throughput3,
static_cast<size_t>(
tracer->NewSpaceAllocationThroughputInBytesPerMillisecond(801)));
EXPECT_EQ(
expected_throughput3,
static_cast<size_t>(
tracer->OldGenerationAllocationThroughputInBytesPerMillisecond(801)));
}
TEST_F(GCTracerTest, RegularScope) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
EXPECT_DOUBLE_EQ(0.0, tracer->current_.scopes[GCTracer::Scope::MC_MARK]);
// Sample not added because the cycle has not started.
tracer->AddScopeSample(GCTracer::Scope::MC_MARK, 10);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kAtomic);
tracer->AddScopeSample(GCTracer::Scope::MC_MARK, 100);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_DOUBLE_EQ(100.0, tracer->current_.scopes[GCTracer::Scope::MC_MARK]);
}
TEST_F(GCTracerTest, IncrementalScope) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
EXPECT_DOUBLE_EQ(
0.0, tracer->current_.scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]);
// Sample is added because its ScopeId is listed as incremental sample.
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 100);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncremental);
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 100);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_DOUBLE_EQ(
200.0, tracer->current_.scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]);
}
TEST_F(GCTracerTest, IncrementalMarkingDetails) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
// Round 1.
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 50);
// Scavenger has no impact on incremental marking details.
StartTracing(tracer, GarbageCollector::SCAVENGER, StartTracingMode::kAtomic);
StopTracing(tracer, GarbageCollector::SCAVENGER);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncremental);
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 100);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_DOUBLE_EQ(
100, tracer->current_
.incremental_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
.longest_step);
EXPECT_EQ(2, tracer->current_
.incremental_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
.steps);
EXPECT_DOUBLE_EQ(
150, tracer->current_
.incremental_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
.duration);
EXPECT_DOUBLE_EQ(
150, tracer->current_.scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]);
// Round 2. Numbers should be reset.
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 13);
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 15);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncremental);
tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 122);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_DOUBLE_EQ(
122, tracer->current_
.incremental_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
.longest_step);
EXPECT_EQ(3, tracer->current_
.incremental_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
.steps);
EXPECT_DOUBLE_EQ(
150, tracer->current_
.incremental_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
.duration);
EXPECT_DOUBLE_EQ(
150, tracer->current_.scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]);
}
TEST_F(GCTracerTest, IncrementalMarkingSpeed) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
// Round 1.
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncrementalStart);
// 1000000 bytes in 100ms.
tracer->AddIncrementalMarkingStep(100, 1000000);
EXPECT_EQ(1000000 / 100,
tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
// 1000000 bytes in 100ms.
tracer->AddIncrementalMarkingStep(100, 1000000);
EXPECT_EQ(1000000 / 100,
tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
// Scavenger has no impact on incremental marking details.
StartTracing(tracer, GarbageCollector::SCAVENGER, StartTracingMode::kAtomic);
StopTracing(tracer, GarbageCollector::SCAVENGER);
// 1000000 bytes in 100ms.
tracer->AddIncrementalMarkingStep(100, 1000000);
EXPECT_EQ(300, tracer->incremental_marking_duration_);
EXPECT_EQ(3000000u, tracer->incremental_marking_bytes_);
EXPECT_EQ(1000000 / 100,
tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
// 1000000 bytes in 100ms.
tracer->AddIncrementalMarkingStep(100, 1000000);
EXPECT_EQ(400, tracer->incremental_marking_duration_);
EXPECT_EQ(4000000u, tracer->incremental_marking_bytes_);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncrementalEnterPause);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_EQ(400, tracer->current_.incremental_marking_duration);
EXPECT_EQ(4000000u, tracer->current_.incremental_marking_bytes);
EXPECT_EQ(0, tracer->incremental_marking_duration_);
EXPECT_EQ(0u, tracer->incremental_marking_bytes_);
EXPECT_EQ(1000000 / 100,
tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
// Round 2.
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncrementalStart);
tracer->AddIncrementalMarkingStep(2000, 1000);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kIncrementalEnterPause);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_DOUBLE_EQ((4000000.0 / 400 + 1000.0 / 2000) / 2,
static_cast<double>(
tracer->IncrementalMarkingSpeedInBytesPerMillisecond()));
}
TEST_F(GCTracerTest, MutatorUtilization) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
// Mark-compact #1 ended at 200ms and took 100ms.
tracer->RecordMutatorUtilization(200, 100);
// Avarage mark-compact time = 0ms.
// Avarage mutator time = 0ms.
EXPECT_DOUBLE_EQ(1.0, tracer->CurrentMarkCompactMutatorUtilization());
EXPECT_DOUBLE_EQ(1.0, tracer->AverageMarkCompactMutatorUtilization());
// Mark-compact #2 ended at 400ms and took 100ms.
tracer->RecordMutatorUtilization(400, 100);
// The first mark-compactor is ignored.
// Avarage mark-compact time = 100ms.
// Avarage mutator time = 100ms.
EXPECT_DOUBLE_EQ(0.5, tracer->CurrentMarkCompactMutatorUtilization());
EXPECT_DOUBLE_EQ(0.5, tracer->AverageMarkCompactMutatorUtilization());
// Mark-compact #3 ended at 600ms and took 200ms.
tracer->RecordMutatorUtilization(600, 200);
// Avarage mark-compact time = 100ms * 0.5 + 200ms * 0.5.
// Avarage mutator time = 100ms * 0.5 + 0ms * 0.5.
EXPECT_DOUBLE_EQ(0.0, tracer->CurrentMarkCompactMutatorUtilization());
EXPECT_DOUBLE_EQ(50.0 / 200.0,
tracer->AverageMarkCompactMutatorUtilization());
// Mark-compact #4 ended at 800ms and took 0ms.
tracer->RecordMutatorUtilization(800, 0);
// Avarage mark-compact time = 150ms * 0.5 + 0ms * 0.5.
// Avarage mutator time = 50ms * 0.5 + 200ms * 0.5.
EXPECT_DOUBLE_EQ(1.0, tracer->CurrentMarkCompactMutatorUtilization());
EXPECT_DOUBLE_EQ(125.0 / 200.0,
tracer->AverageMarkCompactMutatorUtilization());
}
TEST_F(GCTracerTest, BackgroundScavengerScope) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
StartTracing(tracer, GarbageCollector::SCAVENGER, StartTracingMode::kAtomic);
tracer->AddScopeSample(
GCTracer::Scope::SCAVENGER_BACKGROUND_SCAVENGE_PARALLEL, 10);
tracer->AddScopeSample(
GCTracer::Scope::SCAVENGER_BACKGROUND_SCAVENGE_PARALLEL, 1);
StopTracing(tracer, GarbageCollector::SCAVENGER);
EXPECT_DOUBLE_EQ(
11, tracer->current_
.scopes[GCTracer::Scope::SCAVENGER_BACKGROUND_SCAVENGE_PARALLEL]);
}
TEST_F(GCTracerTest, BackgroundMinorMCScope) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
StartTracing(tracer, GarbageCollector::MINOR_MARK_COMPACTOR,
StartTracingMode::kAtomic);
tracer->AddScopeSample(GCTracer::Scope::MINOR_MC_BACKGROUND_MARKING, 10);
tracer->AddScopeSample(GCTracer::Scope::MINOR_MC_BACKGROUND_MARKING, 1);
tracer->AddScopeSample(GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_COPY,
20);
tracer->AddScopeSample(GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_COPY, 2);
tracer->AddScopeSample(
GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_UPDATE_POINTERS, 30);
tracer->AddScopeSample(
GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_UPDATE_POINTERS, 3);
StopTracing(tracer, GarbageCollector::MINOR_MARK_COMPACTOR);
EXPECT_DOUBLE_EQ(
11,
tracer->current_.scopes[GCTracer::Scope::MINOR_MC_BACKGROUND_MARKING]);
EXPECT_DOUBLE_EQ(
22, tracer->current_
.scopes[GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_COPY]);
EXPECT_DOUBLE_EQ(
33, tracer->current_.scopes
[GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_UPDATE_POINTERS]);
}
TEST_F(GCTracerTest, BackgroundMajorMCScope) {
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_MARKING, 100);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_SWEEPING, 200);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_MARKING, 10);
// Scavenger should not affect the major mark-compact scopes.
StartTracing(tracer, GarbageCollector::SCAVENGER, StartTracingMode::kAtomic);
StopTracing(tracer, GarbageCollector::SCAVENGER);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_SWEEPING, 20);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_MARKING, 1);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_SWEEPING, 2);
StartTracing(tracer, GarbageCollector::MARK_COMPACTOR,
StartTracingMode::kAtomic);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_EVACUATE_COPY, 30);
tracer->AddScopeSample(GCTracer::Scope::MC_BACKGROUND_EVACUATE_COPY, 3);
tracer->AddScopeSample(
GCTracer::Scope::MC_BACKGROUND_EVACUATE_UPDATE_POINTERS, 40);
tracer->AddScopeSample(
GCTracer::Scope::MC_BACKGROUND_EVACUATE_UPDATE_POINTERS, 4);
StopTracing(tracer, GarbageCollector::MARK_COMPACTOR);
EXPECT_DOUBLE_EQ(
111, tracer->current_.scopes[GCTracer::Scope::MC_BACKGROUND_MARKING]);
EXPECT_DOUBLE_EQ(
222, tracer->current_.scopes[GCTracer::Scope::MC_BACKGROUND_SWEEPING]);
EXPECT_DOUBLE_EQ(
33,
tracer->current_.scopes[GCTracer::Scope::MC_BACKGROUND_EVACUATE_COPY]);
EXPECT_DOUBLE_EQ(
44, tracer->current_
.scopes[GCTracer::Scope::MC_BACKGROUND_EVACUATE_UPDATE_POINTERS]);
}
class ThreadWithBackgroundScope final : public base::Thread {
public:
explicit ThreadWithBackgroundScope(GCTracer* tracer)
: Thread(Options("ThreadWithBackgroundScope")), tracer_(tracer) {}
void Run() override {
GCTracer::Scope scope(tracer_, GCTracer::Scope::MC_BACKGROUND_MARKING,
ThreadKind::kBackground);
}
private:
GCTracer* tracer_;
};
TEST_F(GCTracerTest, MultithreadedBackgroundScope) {
GCTracer* tracer = i_isolate()->heap()->tracer();
ThreadWithBackgroundScope thread1(tracer);
ThreadWithBackgroundScope thread2(tracer);
tracer->ResetForTesting();
CHECK(thread1.Start());
CHECK(thread2.Start());
tracer->FetchBackgroundMarkCompactCounters();
thread1.Join();
thread2.Join();
tracer->FetchBackgroundMarkCompactCounters();
EXPECT_LE(0, tracer->current_.scopes[GCTracer::Scope::MC_BACKGROUND_MARKING]);
}
class GcHistogram {
public:
static void* CreateHistogram(const char* name, int min, int max,
size_t buckets) {
histograms_[name] = std::unique_ptr<GcHistogram>(new GcHistogram());
return histograms_[name].get();
}
static void AddHistogramSample(void* histogram, int sample) {
if (histograms_.empty()) return;
static_cast<GcHistogram*>(histogram)->samples_.push_back(sample);
}
static GcHistogram* Get(const char* name) { return histograms_[name].get(); }
static void CleanUp() { histograms_.clear(); }
int Total() const {
int result = 0;
for (int i : samples_) {
result += i;
}
return result;
}
int Count() const { return static_cast<int>(samples_.size()); }
private:
std::vector<int> samples_;
static std::map<std::string, std::unique_ptr<GcHistogram>> histograms_;
};
std::map<std::string, std::unique_ptr<GcHistogram>> GcHistogram::histograms_ =
std::map<std::string, std::unique_ptr<GcHistogram>>();
TEST_F(GCTracerTest, RecordMarkCompactHistograms) {
if (FLAG_stress_incremental_marking) return;
isolate()->SetCreateHistogramFunction(&GcHistogram::CreateHistogram);
isolate()->SetAddHistogramSampleFunction(&GcHistogram::AddHistogramSample);
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
tracer->current_.scopes[GCTracer::Scope::MC_CLEAR] = 1;
tracer->current_.scopes[GCTracer::Scope::MC_EPILOGUE] = 2;
tracer->current_.scopes[GCTracer::Scope::MC_EVACUATE] = 3;
tracer->current_.scopes[GCTracer::Scope::MC_FINISH] = 4;
tracer->current_.scopes[GCTracer::Scope::MC_MARK] = 5;
tracer->current_.scopes[GCTracer::Scope::MC_PROLOGUE] = 6;
tracer->current_.scopes[GCTracer::Scope::MC_SWEEP] = 7;
tracer->RecordGCPhasesHistograms(
GCTracer::RecordGCPhasesInfo::Mode::Finalize);
EXPECT_EQ(1, GcHistogram::Get("V8.GCFinalizeMC.Clear")->Total());
EXPECT_EQ(2, GcHistogram::Get("V8.GCFinalizeMC.Epilogue")->Total());
EXPECT_EQ(3, GcHistogram::Get("V8.GCFinalizeMC.Evacuate")->Total());
EXPECT_EQ(4, GcHistogram::Get("V8.GCFinalizeMC.Finish")->Total());
EXPECT_EQ(5, GcHistogram::Get("V8.GCFinalizeMC.Mark")->Total());
EXPECT_EQ(6, GcHistogram::Get("V8.GCFinalizeMC.Prologue")->Total());
EXPECT_EQ(7, GcHistogram::Get("V8.GCFinalizeMC.Sweep")->Total());
GcHistogram::CleanUp();
}
TEST_F(GCTracerTest, RecordScavengerHistograms) {
if (FLAG_stress_incremental_marking) return;
isolate()->SetCreateHistogramFunction(&GcHistogram::CreateHistogram);
isolate()->SetAddHistogramSampleFunction(&GcHistogram::AddHistogramSample);
GCTracer* tracer = i_isolate()->heap()->tracer();
tracer->ResetForTesting();
tracer->current_.scopes[GCTracer::Scope::SCAVENGER_SCAVENGE_ROOTS] = 1;
tracer->current_.scopes[GCTracer::Scope::SCAVENGER_SCAVENGE_PARALLEL] = 2;
tracer->RecordGCPhasesHistograms(
GCTracer::RecordGCPhasesInfo::Mode::Scavenger);
EXPECT_EQ(1, GcHistogram::Get("V8.GCScavenger.ScavengeRoots")->Total());
EXPECT_EQ(2, GcHistogram::Get("V8.GCScavenger.ScavengeMain")->Total());
GcHistogram::CleanUp();
}
} // namespace internal
} // namespace v8
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