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58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
// Copyright 2018 The Chromium 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 "base/task_scheduler/service_thread.h"
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#include "base/debug/alias.h"
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#include "base/task_scheduler/post_task.h"
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#include "base/task_scheduler/task_scheduler.h"
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#include "base/task_scheduler/task_tracker.h"
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#include "base/task_scheduler/task_traits.h"
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#include "base/time/time.h"
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namespace base {
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namespace internal {
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ServiceThread::ServiceThread(const TaskTracker* task_tracker)
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: Thread("TaskSchedulerServiceThread"), task_tracker_(task_tracker) {}
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void ServiceThread::Init() {
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// In unit tests we sometimes do not have a fully functional TaskScheduler
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// environment, do not perform the heartbeat report in that case since it
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// relies on such an environment.
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if (task_tracker_ && TaskScheduler::GetInstance()) {
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heartbeat_latency_timer_.Start(
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FROM_HERE, TimeDelta::FromSeconds(5),
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BindRepeating(&ServiceThread::PerformHeartbeatLatencyReport,
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Unretained(this)));
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}
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}
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NOINLINE void ServiceThread::Run(RunLoop* run_loop) {
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const int line_number = __LINE__;
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Thread::Run(run_loop);
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base::debug::Alias(&line_number);
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}
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void ServiceThread::PerformHeartbeatLatencyReport() const {
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static constexpr TaskTraits kReportedTraits[] = {
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{TaskPriority::BACKGROUND}, {TaskPriority::BACKGROUND, MayBlock()},
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{TaskPriority::USER_VISIBLE}, {TaskPriority::USER_VISIBLE, MayBlock()},
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{TaskPriority::USER_BLOCKING}, {TaskPriority::USER_BLOCKING, MayBlock()}};
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for (auto& traits : kReportedTraits) {
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// Post through the static API to time the full stack. Use a new Now() for
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// every set of traits in case PostTaskWithTraits() itself is slow.
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base::PostTaskWithTraits(
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FROM_HERE, traits,
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BindOnce(&TaskTracker::RecordLatencyHistogram,
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Unretained(task_tracker_),
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TaskTracker::LatencyHistogramType::HEARTBEAT_LATENCY, traits,
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TimeTicks::Now()));
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}
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}
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} // namespace internal
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} // namespace base
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