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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 <limits>
#include "src/heap/gc-idle-time-handler.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace v8 {
namespace internal {
namespace {
class GCIdleTimeHandlerTest : public ::testing::Test {
public:
GCIdleTimeHandlerTest() = default;
~GCIdleTimeHandlerTest() override = default;
GCIdleTimeHandler* handler() { return &handler_; }
GCIdleTimeHeapState DefaultHeapState() {
GCIdleTimeHeapState result;
result.contexts_disposed = 0;
result.contexts_disposal_rate = GCIdleTimeHandler::kHighContextDisposalRate;
result.incremental_marking_stopped = false;
result.size_of_objects = kSizeOfObjects;
return result;
}
static const size_t kSizeOfObjects = 100 * MB;
static const size_t kMarkCompactSpeed = 200 * KB;
static const size_t kMarkingSpeed = 200 * KB;
private:
GCIdleTimeHandler handler_;
};
} // namespace
TEST(GCIdleTimeHandler, EstimateMarkingStepSizeInitial) {
size_t step_size = GCIdleTimeHandler::EstimateMarkingStepSize(1, 0);
EXPECT_EQ(
static_cast<size_t>(GCIdleTimeHandler::kInitialConservativeMarkingSpeed *
GCIdleTimeHandler::kConservativeTimeRatio),
step_size);
}
TEST(GCIdleTimeHandler, EstimateMarkingStepSizeNonZero) {
size_t marking_speed_in_bytes_per_millisecond = 100;
size_t step_size = GCIdleTimeHandler::EstimateMarkingStepSize(
1, marking_speed_in_bytes_per_millisecond);
EXPECT_EQ(static_cast<size_t>(marking_speed_in_bytes_per_millisecond *
GCIdleTimeHandler::kConservativeTimeRatio),
step_size);
}
TEST(GCIdleTimeHandler, EstimateMarkingStepSizeOverflow1) {
size_t step_size = GCIdleTimeHandler::EstimateMarkingStepSize(
10, std::numeric_limits<size_t>::max());
EXPECT_EQ(static_cast<size_t>(GCIdleTimeHandler::kMaximumMarkingStepSize),
step_size);
}
TEST(GCIdleTimeHandler, EstimateMarkingStepSizeOverflow2) {
size_t step_size = GCIdleTimeHandler::EstimateMarkingStepSize(
std::numeric_limits<size_t>::max(), 10);
EXPECT_EQ(static_cast<size_t>(GCIdleTimeHandler::kMaximumMarkingStepSize),
step_size);
}
TEST_F(GCIdleTimeHandlerTest, ShouldDoFinalIncrementalMarkCompact) {
size_t idle_time_ms = 16;
EXPECT_TRUE(GCIdleTimeHandler::ShouldDoFinalIncrementalMarkCompact(
idle_time_ms, 0, 0));
}
TEST_F(GCIdleTimeHandlerTest, DontDoFinalIncrementalMarkCompact) {
size_t idle_time_ms = 1;
EXPECT_FALSE(GCIdleTimeHandler::ShouldDoFinalIncrementalMarkCompact(
idle_time_ms, kSizeOfObjects, kMarkingSpeed));
}
TEST_F(GCIdleTimeHandlerTest, ContextDisposeLowRate) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.contexts_disposed = 1;
heap_state.incremental_marking_stopped = true;
double idle_time_ms = 0;
EXPECT_EQ(GCIdleTimeAction::kDone,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, ContextDisposeHighRate) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.contexts_disposed = 1;
heap_state.contexts_disposal_rate =
GCIdleTimeHandler::kHighContextDisposalRate - 1;
heap_state.incremental_marking_stopped = true;
double idle_time_ms = 0;
EXPECT_EQ(GCIdleTimeAction::kFullGC,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, AfterContextDisposeZeroIdleTime) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.contexts_disposed = 1;
heap_state.contexts_disposal_rate = 1.0;
heap_state.incremental_marking_stopped = true;
double idle_time_ms = 0;
EXPECT_EQ(GCIdleTimeAction::kFullGC,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, AfterContextDisposeSmallIdleTime1) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.contexts_disposed = 1;
heap_state.contexts_disposal_rate =
GCIdleTimeHandler::kHighContextDisposalRate;
size_t speed = kMarkCompactSpeed;
double idle_time_ms = static_cast<double>(kSizeOfObjects / speed - 1);
EXPECT_EQ(GCIdleTimeAction::kIncrementalStep,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, AfterContextDisposeSmallIdleTime2) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.contexts_disposed = 1;
heap_state.contexts_disposal_rate =
GCIdleTimeHandler::kHighContextDisposalRate;
size_t speed = kMarkCompactSpeed;
double idle_time_ms = static_cast<double>(kSizeOfObjects / speed - 1);
EXPECT_EQ(GCIdleTimeAction::kIncrementalStep,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, AfterContextDisposeLargeHeap) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.contexts_disposed = 1;
heap_state.contexts_disposal_rate = 1.0;
heap_state.incremental_marking_stopped = true;
heap_state.size_of_objects = 101 * MB;
double idle_time_ms = 0;
EXPECT_EQ(GCIdleTimeAction::kDone,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, IncrementalMarking1) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
double idle_time_ms = 10;
EXPECT_EQ(GCIdleTimeAction::kIncrementalStep,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, NotEnoughTime) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.incremental_marking_stopped = true;
size_t speed = kMarkCompactSpeed;
double idle_time_ms = static_cast<double>(kSizeOfObjects / speed - 1);
EXPECT_EQ(GCIdleTimeAction::kDone,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, DoNotStartIncrementalMarking) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.incremental_marking_stopped = true;
double idle_time_ms = 10.0;
EXPECT_EQ(GCIdleTimeAction::kDone,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, ContinueAfterStop) {
if (!handler()->Enabled()) return;
GCIdleTimeHeapState heap_state = DefaultHeapState();
heap_state.incremental_marking_stopped = true;
double idle_time_ms = 10.0;
EXPECT_EQ(GCIdleTimeAction::kDone,
handler()->Compute(idle_time_ms, heap_state));
heap_state.incremental_marking_stopped = false;
EXPECT_EQ(GCIdleTimeAction::kIncrementalStep,
handler()->Compute(idle_time_ms, heap_state));
}
TEST_F(GCIdleTimeHandlerTest, DoneIfNotMakingProgressOnIncrementalMarking) {
if (!handler()->Enabled()) return;
// Regression test for crbug.com/489323.
GCIdleTimeHeapState heap_state = DefaultHeapState();
// Simulate incremental marking stopped and not eligible to start.
heap_state.incremental_marking_stopped = true;
double idle_time_ms = 10.0;
// We should return kDone if we cannot start incremental marking.
EXPECT_EQ(GCIdleTimeAction::kDone,
handler()->Compute(idle_time_ms, heap_state));
}
} // namespace internal
} // namespace v8
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