d65d57a7fa
The mutator utilizaton is computed for each mark-compact GC cycle as mutator_time / total_time, where - total_time is the time from the end of the previous GC to the end of the current GC - mutator_time = total_time - incremental_steps_duration - gc_time. Bug: chromium:824214 Change-Id: Ie1814f22f0816a3c9c579107f4950f6fc8c8a72d Reviewed-on: https://chromium-review.googlesource.com/978215 Commit-Queue: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Hannes Payer <hpayer@chromium.org> Cr-Commit-Position: refs/heads/master@{#52221}
456 lines
18 KiB
C++
456 lines
18 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <cmath>
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#include <limits>
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#include "src/base/platform/platform.h"
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#include "src/globals.h"
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#include "src/heap/gc-tracer.h"
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#include "src/isolate.h"
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#include "test/unittests/test-utils.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace v8 {
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namespace internal {
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typedef TestWithContext GCTracerTest;
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TEST(GCTracer, AverageSpeed) {
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base::RingBuffer<BytesAndDuration> buffer;
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EXPECT_EQ(100 / 2,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 0));
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buffer.Push(MakeBytesAndDuration(100, 8));
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EXPECT_EQ(100 / 2,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 2));
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EXPECT_EQ(200 / 10,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(100, 2), 3));
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const int max_speed = 1024 * MB;
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buffer.Reset();
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buffer.Push(MakeBytesAndDuration(max_speed, 0.5));
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EXPECT_EQ(max_speed,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1));
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const int min_speed = 1;
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buffer.Reset();
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buffer.Push(MakeBytesAndDuration(1, 10000));
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EXPECT_EQ(min_speed,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), 1));
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buffer.Reset();
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int sum = 0;
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for (int i = 0; i < buffer.kSize; i++) {
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sum += i + 1;
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buffer.Push(MakeBytesAndDuration(i + 1, 1));
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}
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EXPECT_EQ(
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sum * 1.0 / buffer.kSize,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize));
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buffer.Push(MakeBytesAndDuration(100, 1));
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EXPECT_EQ(
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(sum * 1.0 - 1 + 100) / buffer.kSize,
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GCTracer::AverageSpeed(buffer, MakeBytesAndDuration(0, 0), buffer.kSize));
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}
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namespace {
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void SampleAndAddAllocaton(v8::internal::GCTracer* tracer, double time_ms,
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size_t new_space_counter_bytes,
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size_t old_generation_counter_bytes) {
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tracer->SampleAllocation(time_ms, new_space_counter_bytes,
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old_generation_counter_bytes);
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tracer->AddAllocation(time_ms);
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}
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} // namespace
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TEST_F(GCTracerTest, AllocationThroughput) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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int time1 = 100;
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size_t counter1 = 1000;
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// First sample creates baseline but is not part of the recorded samples.
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tracer->SampleAllocation(time1, counter1, counter1);
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SampleAndAddAllocaton(tracer, time1, counter1, counter1);
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int time2 = 200;
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size_t counter2 = 2000;
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SampleAndAddAllocaton(tracer, time2, counter2, counter2);
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// Will only consider the current sample.
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size_t throughput = static_cast<size_t>(
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tracer->AllocationThroughputInBytesPerMillisecond(100));
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EXPECT_EQ(2 * (counter2 - counter1) / (time2 - time1), throughput);
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int time3 = 1000;
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size_t counter3 = 30000;
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SampleAndAddAllocaton(tracer, time3, counter3, counter3);
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// Considers last 2 samples.
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throughput = tracer->AllocationThroughputInBytesPerMillisecond(801);
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EXPECT_EQ(2 * (counter3 - counter1) / (time3 - time1), throughput);
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}
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TEST_F(GCTracerTest, NewSpaceAllocationThroughput) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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int time1 = 100;
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size_t counter1 = 1000;
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SampleAndAddAllocaton(tracer, time1, counter1, 0);
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int time2 = 200;
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size_t counter2 = 2000;
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SampleAndAddAllocaton(tracer, time2, counter2, 0);
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size_t throughput =
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tracer->NewSpaceAllocationThroughputInBytesPerMillisecond();
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EXPECT_EQ((counter2 - counter1) / (time2 - time1), throughput);
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int time3 = 1000;
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size_t counter3 = 30000;
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SampleAndAddAllocaton(tracer, time3, counter3, 0);
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throughput = tracer->NewSpaceAllocationThroughputInBytesPerMillisecond();
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EXPECT_EQ((counter3 - counter1) / (time3 - time1), throughput);
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}
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TEST_F(GCTracerTest, NewSpaceAllocationThroughputWithProvidedTime) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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int time1 = 100;
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size_t counter1 = 1000;
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// First sample creates baseline but is not part of the recorded samples.
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SampleAndAddAllocaton(tracer, time1, counter1, 0);
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int time2 = 200;
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size_t counter2 = 2000;
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SampleAndAddAllocaton(tracer, time2, counter2, 0);
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// Will only consider the current sample.
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size_t throughput =
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tracer->NewSpaceAllocationThroughputInBytesPerMillisecond(100);
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EXPECT_EQ((counter2 - counter1) / (time2 - time1), throughput);
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int time3 = 1000;
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size_t counter3 = 30000;
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SampleAndAddAllocaton(tracer, time3, counter3, 0);
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// Considers last 2 samples.
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throughput = tracer->NewSpaceAllocationThroughputInBytesPerMillisecond(801);
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EXPECT_EQ((counter3 - counter1) / (time3 - time1), throughput);
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}
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TEST_F(GCTracerTest, OldGenerationAllocationThroughputWithProvidedTime) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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int time1 = 100;
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size_t counter1 = 1000;
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// First sample creates baseline but is not part of the recorded samples.
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SampleAndAddAllocaton(tracer, time1, 0, counter1);
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int time2 = 200;
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size_t counter2 = 2000;
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SampleAndAddAllocaton(tracer, time2, 0, counter2);
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// Will only consider the current sample.
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size_t throughput = static_cast<size_t>(
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tracer->OldGenerationAllocationThroughputInBytesPerMillisecond(100));
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EXPECT_EQ((counter2 - counter1) / (time2 - time1), throughput);
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int time3 = 1000;
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size_t counter3 = 30000;
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SampleAndAddAllocaton(tracer, time3, 0, counter3);
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// Considers last 2 samples.
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throughput = static_cast<size_t>(
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tracer->OldGenerationAllocationThroughputInBytesPerMillisecond(801));
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EXPECT_EQ((counter3 - counter1) / (time3 - time1), throughput);
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}
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TEST_F(GCTracerTest, RegularScope) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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EXPECT_DOUBLE_EQ(0.0, tracer->current_.scopes[GCTracer::Scope::MC_MARK]);
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// Sample not added because it's not within a started tracer.
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tracer->AddScopeSample(GCTracer::Scope::MC_MARK, 100);
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->AddScopeSample(GCTracer::Scope::MC_MARK, 100);
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tracer->Stop(MARK_COMPACTOR);
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EXPECT_DOUBLE_EQ(100.0, tracer->current_.scopes[GCTracer::Scope::MC_MARK]);
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}
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TEST_F(GCTracerTest, IncrementalScope) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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EXPECT_DOUBLE_EQ(
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0.0, tracer->current_.scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]);
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// Sample is added because its ScopeId is listed as incremental sample.
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 100);
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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// Switch to incremental MC to enable writing back incremental scopes.
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tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 100);
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tracer->Stop(MARK_COMPACTOR);
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EXPECT_DOUBLE_EQ(
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200.0, tracer->current_.scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]);
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}
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TEST_F(GCTracerTest, IncrementalMarkingDetails) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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// Round 1.
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 50);
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// Scavenger has no impact on incremental marking details.
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tracer->Start(SCAVENGER, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->Stop(SCAVENGER);
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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// Switch to incremental MC to enable writing back incremental scopes.
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tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 100);
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tracer->Stop(MARK_COMPACTOR);
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EXPECT_DOUBLE_EQ(
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100,
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tracer->current_
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.incremental_marking_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
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.longest_step);
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EXPECT_EQ(
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2,
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tracer->current_
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.incremental_marking_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
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.steps);
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EXPECT_DOUBLE_EQ(
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150,
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tracer->current_
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.incremental_marking_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
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.duration);
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// Round 2. Numbers should be reset.
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 13);
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 15);
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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// Switch to incremental MC to enable writing back incremental scopes.
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tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
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tracer->AddScopeSample(GCTracer::Scope::MC_INCREMENTAL_FINALIZE, 122);
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tracer->Stop(MARK_COMPACTOR);
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EXPECT_DOUBLE_EQ(
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122,
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tracer->current_
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.incremental_marking_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
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.longest_step);
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EXPECT_EQ(
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3,
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tracer->current_
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.incremental_marking_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
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.steps);
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EXPECT_DOUBLE_EQ(
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150,
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tracer->current_
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.incremental_marking_scopes[GCTracer::Scope::MC_INCREMENTAL_FINALIZE]
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.duration);
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}
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TEST_F(GCTracerTest, IncrementalMarkingSpeed) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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// Round 1.
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// 1000000 bytes in 100ms.
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tracer->AddIncrementalMarkingStep(100, 1000000);
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EXPECT_EQ(1000000 / 100,
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tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
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// 1000000 bytes in 100ms.
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tracer->AddIncrementalMarkingStep(100, 1000000);
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EXPECT_EQ(1000000 / 100,
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tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
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// Scavenger has no impact on incremental marking details.
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tracer->Start(SCAVENGER, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->Stop(SCAVENGER);
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// 1000000 bytes in 100ms.
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tracer->AddIncrementalMarkingStep(100, 1000000);
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EXPECT_EQ(300, tracer->incremental_marking_duration_);
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EXPECT_EQ(3000000u, tracer->incremental_marking_bytes_);
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EXPECT_EQ(1000000 / 100,
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tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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// Switch to incremental MC.
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tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
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// 1000000 bytes in 100ms.
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tracer->AddIncrementalMarkingStep(100, 1000000);
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EXPECT_EQ(400, tracer->incremental_marking_duration_);
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EXPECT_EQ(4000000u, tracer->incremental_marking_bytes_);
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tracer->Stop(MARK_COMPACTOR);
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EXPECT_EQ(400, tracer->current_.incremental_marking_duration);
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EXPECT_EQ(4000000u, tracer->current_.incremental_marking_bytes);
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EXPECT_EQ(0, tracer->incremental_marking_duration_);
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EXPECT_EQ(0u, tracer->incremental_marking_bytes_);
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EXPECT_EQ(1000000 / 100,
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tracer->IncrementalMarkingSpeedInBytesPerMillisecond());
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// Round 2.
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tracer->AddIncrementalMarkingStep(2000, 1000);
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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// Switch to incremental MC.
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tracer->current_.type = GCTracer::Event::INCREMENTAL_MARK_COMPACTOR;
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tracer->Stop(MARK_COMPACTOR);
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EXPECT_DOUBLE_EQ((4000000.0 / 400 + 1000.0 / 2000) / 2,
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static_cast<double>(
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tracer->IncrementalMarkingSpeedInBytesPerMillisecond()));
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}
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TEST_F(GCTracerTest, MutatorUtilization) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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// Mark-compact #1 ended at 200ms and took 100ms.
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tracer->RecordMutatorUtilization(200, 100);
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// Avarage mark-compact time = 0ms.
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// Avarage mutator time = 0ms.
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EXPECT_DOUBLE_EQ(1.0, tracer->CurrentMarkCompactMutatorUtilization());
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EXPECT_DOUBLE_EQ(1.0, tracer->AverageMarkCompactMutatorUtilization());
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// Mark-compact #2 ended at 400ms and took 100ms.
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tracer->RecordMutatorUtilization(400, 100);
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// The first mark-compactor is ignored.
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// Avarage mark-compact time = 100ms.
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// Avarage mutator time = 100ms.
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EXPECT_DOUBLE_EQ(0.5, tracer->CurrentMarkCompactMutatorUtilization());
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EXPECT_DOUBLE_EQ(0.5, tracer->AverageMarkCompactMutatorUtilization());
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// Mark-compact #3 ended at 600ms and took 200ms.
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tracer->RecordMutatorUtilization(600, 200);
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// Avarage mark-compact time = 100ms * 0.5 + 200ms * 0.5.
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// Avarage mutator time = 100ms * 0.5 + 0ms * 0.5.
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EXPECT_DOUBLE_EQ(0.0, tracer->CurrentMarkCompactMutatorUtilization());
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EXPECT_DOUBLE_EQ(50.0 / 200.0,
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tracer->AverageMarkCompactMutatorUtilization());
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// Mark-compact #4 ended at 800ms and took 0ms.
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tracer->RecordMutatorUtilization(800, 0);
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// Avarage mark-compact time = 150ms * 0.5 + 0ms * 0.5.
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// Avarage mutator time = 50ms * 0.5 + 200ms * 0.5.
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EXPECT_DOUBLE_EQ(1.0, tracer->CurrentMarkCompactMutatorUtilization());
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EXPECT_DOUBLE_EQ(125.0 / 200.0,
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tracer->AverageMarkCompactMutatorUtilization());
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}
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TEST_F(GCTracerTest, BackgroundScavengerScope) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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tracer->Start(SCAVENGER, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::SCAVENGER_BACKGROUND_SCAVENGE_PARALLEL, 10,
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nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::SCAVENGER_BACKGROUND_SCAVENGE_PARALLEL, 1,
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nullptr);
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tracer->Stop(SCAVENGER);
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EXPECT_DOUBLE_EQ(
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11, tracer->current_
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.scopes[GCTracer::Scope::SCAVENGER_BACKGROUND_SCAVENGE_PARALLEL]);
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}
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TEST_F(GCTracerTest, BackgroundMinorMCScope) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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tracer->Start(MINOR_MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MINOR_MC_BACKGROUND_MARKING, 10, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MINOR_MC_BACKGROUND_MARKING, 1, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MINOR_MC_BACKGROUND_EVACUATE_COPY, 20,
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nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MINOR_MC_BACKGROUND_EVACUATE_COPY, 2, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MINOR_MC_BACKGROUND_EVACUATE_UPDATE_POINTERS,
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30, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MINOR_MC_BACKGROUND_EVACUATE_UPDATE_POINTERS,
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3, nullptr);
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tracer->Stop(MINOR_MARK_COMPACTOR);
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EXPECT_DOUBLE_EQ(
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11,
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tracer->current_.scopes[GCTracer::Scope::MINOR_MC_BACKGROUND_MARKING]);
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EXPECT_DOUBLE_EQ(
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22, tracer->current_
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.scopes[GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_COPY]);
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EXPECT_DOUBLE_EQ(
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33, tracer->current_.scopes
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[GCTracer::Scope::MINOR_MC_BACKGROUND_EVACUATE_UPDATE_POINTERS]);
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}
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TEST_F(GCTracerTest, BackgroundMajorMCScope) {
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GCTracer* tracer = i_isolate()->heap()->tracer();
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tracer->ResetForTesting();
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_MARKING, 100, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_SWEEPING, 200, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_MARKING, 10, nullptr);
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// Scavenger should not affect the major mark-compact scopes.
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tracer->Start(SCAVENGER, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->Stop(SCAVENGER);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_SWEEPING, 20, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_MARKING, 1, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_SWEEPING, 2, nullptr);
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tracer->Start(MARK_COMPACTOR, GarbageCollectionReason::kTesting,
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"collector unittest");
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_EVACUATE_COPY, 30, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_EVACUATE_COPY, 3, nullptr);
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tracer->AddBackgroundScopeSample(
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GCTracer::BackgroundScope::MC_BACKGROUND_EVACUATE_UPDATE_POINTERS, 40,
|
|
nullptr);
|
|
tracer->AddBackgroundScopeSample(
|
|
GCTracer::BackgroundScope::MC_BACKGROUND_EVACUATE_UPDATE_POINTERS, 4,
|
|
nullptr);
|
|
tracer->Stop(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::BackgroundScope scope(
|
|
tracer_, GCTracer::BackgroundScope::MC_BACKGROUND_MARKING);
|
|
}
|
|
|
|
private:
|
|
GCTracer* tracer_;
|
|
};
|
|
|
|
TEST_F(GCTracerTest, MultithreadedBackgroundScope) {
|
|
GCTracer* tracer = i_isolate()->heap()->tracer();
|
|
ThreadWithBackgroundScope thread1(tracer);
|
|
ThreadWithBackgroundScope thread2(tracer);
|
|
tracer->ResetForTesting();
|
|
thread1.Start();
|
|
thread2.Start();
|
|
tracer->FetchBackgroundMarkCompactCounters();
|
|
thread1.Join();
|
|
thread2.Join();
|
|
tracer->FetchBackgroundMarkCompactCounters();
|
|
EXPECT_LE(0, tracer->current_.scopes[GCTracer::Scope::MC_BACKGROUND_MARKING]);
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|