7c2aef087e
This flag stresses different interleavings of background and foreground
tasks by delaying the execution of each task by a random value between
0 and 100ms (with a quadratic distribution favoring smaller delayes).
The implementation is encapsulated in the new {DelayedTasksPlatform}
class, which wraps each task in a {DelayedTask} which first sleeps for
the given number of microseconds, then executes the actual task.
Both the old {PredictablePlatform} and the new {DelayedTasksPlatform}
are moved to the new d8-platforms.cc file with an interface to create
them in d8-platforms.h.
R=yangguo@chromium.org, mslekova@chromium.org
Bug: v8:8278
Change-Id: I5847fb2da31ffde773195da7ad3f56a0390cc05b
Reviewed-on: https://chromium-review.googlesource.com/c/1270592
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56496}
30 lines
940 B
C++
30 lines
940 B
C++
// Copyright 2018 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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#ifndef V8_D8_PLATFORMS_H_
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#define V8_D8_PLATFORMS_H_
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#include <cstdint>
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#include <memory>
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namespace v8 {
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class Platform;
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// Returns a predictable v8::Platform implementation.
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// orker threads are disabled, idle tasks are disallowed, and the time reported
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// by {MonotonicallyIncreasingTime} is deterministic.
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std::unique_ptr<Platform> MakePredictablePlatform(
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std::unique_ptr<Platform> platform);
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// Returns a v8::Platform implementation which randomly delays tasks (both
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// foreground and background) for stress-testing different interleavings.
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// If {random_seed} is 0, a random seed is chosen.
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std::unique_ptr<Platform> MakeDelayedTasksPlatform(
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std::unique_ptr<Platform> platform, int64_t random_seed);
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} // namespace v8
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#endif // V8_D8_PLATFORMS_H_
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