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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/raster/categorized_worker_pool.h"
#include <utility>
#include "base/functional/callback.h"
#include "base/task/sequenced_task_runner.h"
#include "base/test/bind.h"
#include "base/test/sequenced_task_runner_test_template.h"
#include "base/test/task_runner_test_template.h"
#include "base/threading/platform_thread.h"
#include "base/threading/simple_thread.h"
#include "cc/test/task_graph_runner_test_template.h"
namespace cc {
namespace {
// Number of threads spawned in tests.
const int kNumThreads = 4;
template <class T>
class CategorizedWorkerPoolTestDelegate {
public:
CategorizedWorkerPoolTestDelegate() = default;
void StartTaskRunner() { categorized_worker_pool_->Start(kNumThreads); }
scoped_refptr<CategorizedWorkerPool> GetTaskRunner() {
return categorized_worker_pool_;
}
void StopTaskRunner() { categorized_worker_pool_->FlushForTesting(); }
~CategorizedWorkerPoolTestDelegate() { categorized_worker_pool_->Shutdown(); }
private:
scoped_refptr<CategorizedWorkerPool> categorized_worker_pool_ =
base::MakeRefCounted<T>();
};
template <class T>
class CategorizedWorkerPoolSequencedTestDelegate {
public:
CategorizedWorkerPoolSequencedTestDelegate() = default;
void StartTaskRunner() { categorized_worker_pool_->Start(kNumThreads); }
scoped_refptr<base::SequencedTaskRunner> GetTaskRunner() {
return categorized_worker_pool_->CreateSequencedTaskRunner();
}
void StopTaskRunner() { categorized_worker_pool_->FlushForTesting(); }
~CategorizedWorkerPoolSequencedTestDelegate() {
categorized_worker_pool_->Shutdown();
}
private:
scoped_refptr<CategorizedWorkerPool> categorized_worker_pool_ =
base::MakeRefCounted<T>();
};
template <class T, int NumThreads>
class CategorizedWorkerPoolTaskGraphRunnerTestDelegate {
public:
CategorizedWorkerPoolTaskGraphRunnerTestDelegate() = default;
void StartTaskGraphRunner() { categorized_worker_pool_->Start(kNumThreads); }
TaskGraphRunner* GetTaskGraphRunner() {
return categorized_worker_pool_->GetTaskGraphRunner();
}
void StopTaskGraphRunner() { categorized_worker_pool_->FlushForTesting(); }
~CategorizedWorkerPoolTaskGraphRunnerTestDelegate() {
categorized_worker_pool_->Shutdown();
}
private:
scoped_refptr<CategorizedWorkerPool> categorized_worker_pool_ =
base::MakeRefCounted<T>();
};
class CategorizedWorkerPoolTest : public testing::Test {
protected:
CategorizedWorkerPoolTest() = default;
~CategorizedWorkerPoolTest() override = default;
void SetUp() override {
categorized_worker_pool_ = scoped_refptr<CategorizedWorkerPool>(
base::MakeRefCounted<CategorizedWorkerPoolJob>());
categorized_worker_pool_->Start(kNumThreads);
namespace_token_ = categorized_worker_pool_->GenerateNamespaceToken();
}
void TearDown() override {
Task::Vector completed_tasks;
categorized_worker_pool_->CollectCompletedTasks(namespace_token_,
&completed_tasks);
categorized_worker_pool_->Shutdown();
}
scoped_refptr<CategorizedWorkerPool> categorized_worker_pool_;
NamespaceToken namespace_token_;
};
class ClosureTask : public Task {
public:
explicit ClosureTask(base::OnceClosure closure)
: closure_(std::move(closure)) {}
ClosureTask(const ClosureTask&) = delete;
ClosureTask& operator=(const ClosureTask&) = delete;
// Overridden from Task:
void RunOnWorkerThread() override { std::move(closure_).Run(); }
protected:
~ClosureTask() override = default;
private:
base::OnceClosure closure_;
};
} // namespace
// Verify that multiple tasks posted with TASK_CATEGORY_BACKGROUND and
// TASK_CATEGORY_BACKGROUND_WITH_NORMAL_THREAD_PRIORITY don't run
// concurrently.
TEST_F(CategorizedWorkerPoolTest, BackgroundTasksDontRunConcurrently) {
Task::Vector tasks;
TaskGraph graph;
bool is_running_task = false;
for (size_t i = 0; i < 100; ++i) {
tasks.push_back(
base::MakeRefCounted<ClosureTask>(base::BindLambdaForTesting([&]() {
// Rely on TSAN to warn if reading |was_running_task| is racy. It
// shouldn't if only one background task runs at a time.
EXPECT_FALSE(is_running_task);
is_running_task = true;
base::PlatformThread::Sleep(base::Milliseconds(10));
is_running_task = false;
})));
graph.nodes.push_back(TaskGraph::Node(
tasks.back(),
i % 2 == 0 ? TASK_CATEGORY_BACKGROUND
: TASK_CATEGORY_BACKGROUND_WITH_NORMAL_THREAD_PRIORITY,
/* priority=*/0u, /* dependencies=*/0u));
}
categorized_worker_pool_->ScheduleTasks(namespace_token_, &graph);
categorized_worker_pool_->WaitForTasksToFinishRunning(namespace_token_);
categorized_worker_pool_->FlushForTesting();
}
// Verify that a TASK_CATEGORY_BACKGROUND_WITH_NORMAL_THREAD_PRIORITY task
// doesn't run at background thread priority.
TEST_F(CategorizedWorkerPoolTest,
AcquiresForegroundResourcesNotBackgroundThreadPriority) {
Task::Vector tasks;
TaskGraph graph;
tasks.push_back(base::MakeRefCounted<ClosureTask>(base::BindOnce([]() {
EXPECT_NE(base::ThreadType::kBackground,
base::PlatformThread::GetCurrentThreadType());
})));
graph.nodes.push_back(TaskGraph::Node(
tasks.back(), TASK_CATEGORY_BACKGROUND_WITH_NORMAL_THREAD_PRIORITY,
/* priority=*/0u, /* dependencies=*/0u));
categorized_worker_pool_->ScheduleTasks(namespace_token_, &graph);
categorized_worker_pool_->WaitForTasksToFinishRunning(namespace_token_);
categorized_worker_pool_->FlushForTesting();
}
} // namespace cc
// Test suite instantiation needs to be in the same namespace as test suite
// definition.
namespace base {
INSTANTIATE_TYPED_TEST_SUITE_P(
CategorizedWorkerPoolJob,
TaskRunnerTest,
cc::CategorizedWorkerPoolTestDelegate<cc::CategorizedWorkerPoolJob>);
INSTANTIATE_TYPED_TEST_SUITE_P(CategorizedWorkerPoolJob,
SequencedTaskRunnerTest,
cc::CategorizedWorkerPoolSequencedTestDelegate<
cc::CategorizedWorkerPoolJob>);
} // namespace base
namespace cc {
// Multithreaded tests.
using CategorizedWorkerPoolJobTaskGraphRunnerTestDelegate_1_5 =
::testing::Types<CategorizedWorkerPoolTaskGraphRunnerTestDelegate<
CategorizedWorkerPoolJob,
1>,
CategorizedWorkerPoolTaskGraphRunnerTestDelegate<
CategorizedWorkerPoolJob,
2>,
CategorizedWorkerPoolTaskGraphRunnerTestDelegate<
CategorizedWorkerPoolJob,
3>,
CategorizedWorkerPoolTaskGraphRunnerTestDelegate<
CategorizedWorkerPoolJob,
4>,
CategorizedWorkerPoolTaskGraphRunnerTestDelegate<
CategorizedWorkerPoolJob,
5>>;
INSTANTIATE_TYPED_TEST_SUITE_P(
CategorizedWorkerPoolJob_1_5_Threads,
TaskGraphRunnerTest,
CategorizedWorkerPoolJobTaskGraphRunnerTestDelegate_1_5);
// Single threaded tests.
using CategorizedWorkerPoolJobTaskGraphRunnerTestDelegate =
CategorizedWorkerPoolTaskGraphRunnerTestDelegate<CategorizedWorkerPoolJob,
1>;
INSTANTIATE_TYPED_TEST_SUITE_P(
CategorizedWorkerPoolJob,
SingleThreadTaskGraphRunnerTest,
CategorizedWorkerPoolJobTaskGraphRunnerTestDelegate);
} // namespace cc
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