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112 lines
3.9 KiB
112 lines
3.9 KiB
// 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 <string>
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#include "base/bind.h"
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#include "base/debug/stack_trace.h"
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#include "base/task_scheduler/task_scheduler.h"
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#include "base/task_scheduler/task_scheduler_impl.h"
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#include "base/test/metrics/histogram_tester.h"
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#include "base/threading/platform_thread.h"
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#include "base/time/time.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace internal {
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namespace {
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// Verifies that |query| is found on the current stack. Ignores failures if this
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// configuration doesn't have symbols.
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void VerifyHasStringOnStack(const std::string& query) {
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const std::string stack = debug::StackTrace().ToString();
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SCOPED_TRACE(stack);
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const bool found_on_stack = stack.find(query) != std::string::npos;
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const bool stack_has_symbols =
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stack.find("SchedulerWorker") != std::string::npos;
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EXPECT_TRUE(found_on_stack || !stack_has_symbols) << query;
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}
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} // namespace
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#if defined(OS_POSIX)
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// Many POSIX bots flakily crash on |debug::StackTrace().ToString()|,
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// https://crbug.com/840429.
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#define MAYBE_StackHasIdentifyingFrame DISABLED_StackHasIdentifyingFrame
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#else
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#define MAYBE_StackHasIdentifyingFrame StackHasIdentifyingFrame
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#endif
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TEST(TaskSchedulerServiceThreadTest, MAYBE_StackHasIdentifyingFrame) {
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ServiceThread service_thread(nullptr);
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service_thread.Start();
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service_thread.task_runner()->PostTask(
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FROM_HERE, BindOnce(&VerifyHasStringOnStack, "ServiceThread"));
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service_thread.FlushForTesting();
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}
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#if defined(OS_ANDROID)
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// The heartbeat latency report has been temporarily disabled on Android per
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// https://crbug.com/848255.
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#define MAYBE_HeartbeatLatencyReport DISABLED_HeartbeatLatencyReport
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#else
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#define MAYBE_HeartbeatLatencyReport HeartbeatLatencyReport
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#endif
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// Integration test verifying that a service thread running in a fully
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// integrated TaskScheduler environment results in reporting
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// HeartbeatLatencyMicroseconds metrics.
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TEST(TaskSchedulerServiceThreadIntegrationTest, MAYBE_HeartbeatLatencyReport) {
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ServiceThread::SetHeartbeatIntervalForTesting(TimeDelta::FromMilliseconds(1));
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TaskScheduler::SetInstance(
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std::make_unique<internal::TaskSchedulerImpl>("Test"));
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TaskScheduler::GetInstance()->StartWithDefaultParams();
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static constexpr const char* kExpectedMetrics[] = {
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"TaskScheduler.HeartbeatLatencyMicroseconds.Test."
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"UserBlockingTaskPriority",
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"TaskScheduler.HeartbeatLatencyMicroseconds.Test."
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"UserBlockingTaskPriority_MayBlock",
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"TaskScheduler.HeartbeatLatencyMicroseconds.Test."
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"UserVisibleTaskPriority",
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"TaskScheduler.HeartbeatLatencyMicroseconds.Test."
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"UserVisibleTaskPriority_MayBlock",
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"TaskScheduler.HeartbeatLatencyMicroseconds.Test."
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"BackgroundTaskPriority",
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"TaskScheduler.HeartbeatLatencyMicroseconds.Test."
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"BackgroundTaskPriority_MayBlock"};
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// Each report hits a single histogram above (randomly selected). But 1000
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// reports should touch all histograms at least once the vast majority of the
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// time.
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constexpr TimeDelta kReasonableTimeout = TimeDelta::FromSeconds(1);
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constexpr TimeDelta kBusyWaitTime = TimeDelta::FromMilliseconds(100);
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const TimeTicks start_time = TimeTicks::Now();
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HistogramTester tester;
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for (const char* expected_metric : kExpectedMetrics) {
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while (tester.GetAllSamples(expected_metric).empty()) {
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if (TimeTicks::Now() - start_time > kReasonableTimeout)
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LOG(WARNING) << "Waiting a while for " << expected_metric;
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PlatformThread::Sleep(kBusyWaitTime);
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}
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}
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TaskScheduler::GetInstance()->JoinForTesting();
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TaskScheduler::SetInstance(nullptr);
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ServiceThread::SetHeartbeatIntervalForTesting(TimeDelta());
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}
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} // namespace internal
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} // namespace base
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