bc272e9f7c
This avoids redundant casts, loss of precision, and potential overflows. BUG=chromium:597310 LOG=NO Review URL: https://codereview.chromium.org/1841043002 Cr-Commit-Position: refs/heads/master@{#35113}
112 lines
4.2 KiB
C++
112 lines
4.2 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 <limits>
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#include "src/globals.h"
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#include "src/heap/scavenge-job.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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const size_t kScavengeSpeedInBytesPerMs = 500 * KB;
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const size_t kNewSpaceCapacity = 8 * MB;
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TEST(ScavengeJob, AllocationLimitEmptyNewSpace) {
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EXPECT_FALSE(ScavengeJob::ReachedIdleAllocationLimit(
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kScavengeSpeedInBytesPerMs, 0, kNewSpaceCapacity));
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}
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TEST(ScavengeJob, AllocationLimitFullNewSpace) {
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EXPECT_TRUE(ScavengeJob::ReachedIdleAllocationLimit(
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kScavengeSpeedInBytesPerMs, kNewSpaceCapacity, kNewSpaceCapacity));
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}
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TEST(ScavengeJob, AllocationLimitUnknownScavengeSpeed) {
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size_t expected_size = ScavengeJob::kInitialScavengeSpeedInBytesPerMs *
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ScavengeJob::kAverageIdleTimeMs -
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ScavengeJob::kBytesAllocatedBeforeNextIdleTask;
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EXPECT_FALSE(ScavengeJob::ReachedIdleAllocationLimit(0, expected_size - 1,
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kNewSpaceCapacity));
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EXPECT_TRUE(ScavengeJob::ReachedIdleAllocationLimit(0, expected_size,
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kNewSpaceCapacity));
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}
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TEST(ScavengeJob, AllocationLimitLowScavengeSpeed) {
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size_t scavenge_speed = 1 * KB;
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EXPECT_FALSE(ScavengeJob::ReachedIdleAllocationLimit(
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scavenge_speed, ScavengeJob::kMinAllocationLimit - 1, kNewSpaceCapacity));
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EXPECT_TRUE(ScavengeJob::ReachedIdleAllocationLimit(
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scavenge_speed, ScavengeJob::kMinAllocationLimit, kNewSpaceCapacity));
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}
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TEST(ScavengeJob, AllocationLimitAverageScavengeSpeed) {
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size_t expected_size =
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kScavengeSpeedInBytesPerMs * ScavengeJob::kAverageIdleTimeMs -
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ScavengeJob::kBytesAllocatedBeforeNextIdleTask;
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EXPECT_FALSE(ScavengeJob::ReachedIdleAllocationLimit(
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kScavengeSpeedInBytesPerMs, ScavengeJob::kMinAllocationLimit,
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kNewSpaceCapacity));
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EXPECT_FALSE(ScavengeJob::ReachedIdleAllocationLimit(
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kScavengeSpeedInBytesPerMs, expected_size - 1, kNewSpaceCapacity));
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EXPECT_TRUE(ScavengeJob::ReachedIdleAllocationLimit(
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kScavengeSpeedInBytesPerMs, expected_size, kNewSpaceCapacity));
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}
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TEST(ScavengeJob, AllocationLimitHighScavengeSpeed) {
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size_t scavenge_speed = kNewSpaceCapacity;
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size_t expected_size =
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static_cast<size_t>(
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kNewSpaceCapacity *
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ScavengeJob::kMaxAllocationLimitAsFractionOfNewSpace) -
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ScavengeJob::kBytesAllocatedBeforeNextIdleTask;
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EXPECT_FALSE(ScavengeJob::ReachedIdleAllocationLimit(
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scavenge_speed, expected_size - 1, kNewSpaceCapacity));
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EXPECT_TRUE(ScavengeJob::ReachedIdleAllocationLimit(
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scavenge_speed, expected_size + 1, kNewSpaceCapacity));
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}
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TEST(ScavengeJob, EnoughIdleTimeForScavengeUnknownScavengeSpeed) {
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size_t scavenge_speed = ScavengeJob::kInitialScavengeSpeedInBytesPerMs;
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size_t new_space_size = 1 * MB;
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size_t expected_time = (new_space_size + scavenge_speed - 1) / scavenge_speed;
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EXPECT_TRUE(
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ScavengeJob::EnoughIdleTimeForScavenge(expected_time, 0, new_space_size));
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EXPECT_FALSE(ScavengeJob::EnoughIdleTimeForScavenge(expected_time - 1, 0,
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new_space_size));
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}
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TEST(ScavengeJob, EnoughIdleTimeForScavengeLowScavengeSpeed) {
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size_t scavenge_speed = 1 * KB;
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size_t new_space_size = 1 * MB;
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size_t expected_time = (new_space_size + scavenge_speed - 1) / scavenge_speed;
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EXPECT_TRUE(ScavengeJob::EnoughIdleTimeForScavenge(
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expected_time, scavenge_speed, new_space_size));
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EXPECT_FALSE(ScavengeJob::EnoughIdleTimeForScavenge(
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expected_time - 1, scavenge_speed, new_space_size));
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}
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TEST(ScavengeJob, EnoughIdleTimeForScavengeHighScavengeSpeed) {
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size_t scavenge_speed = kNewSpaceCapacity;
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size_t new_space_size = 1 * MB;
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size_t expected_time = (new_space_size + scavenge_speed - 1) / scavenge_speed;
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EXPECT_TRUE(ScavengeJob::EnoughIdleTimeForScavenge(
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expected_time, scavenge_speed, new_space_size));
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EXPECT_FALSE(ScavengeJob::EnoughIdleTimeForScavenge(
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expected_time - 1, scavenge_speed, new_space_size));
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}
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} // namespace internal
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} // namespace v8
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