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379028ab66
- Add the functionality to merge and unmerge MessageLoopTaskQueues This introduces a notion of a "owning" and "subsumed" queue ids. Owning queue will take care of the tasks submitted to both that and it's subsumed queue. - The tasks submitted still maintain the queue affinity - Same for the task observers - Also adds MergedQueuesRunner which grabs both the locks owner and subsumed queues in RAII fashion. - Also use task queue id to verify if we are running in the same thread. - This is to enable merging the backed message loop task queues to enable dynamic thread merging in IOS.
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
// Copyright 2013 The Flutter 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 <cassert>
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#include <string>
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#include <thread>
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#include <vector>
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#include "flutter/benchmarking/benchmarking.h"
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#include "flutter/fml/message_loop_task_queues.h"
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#include "flutter/fml/synchronization/count_down_latch.h"
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namespace fml {
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namespace benchmarking {
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static void BM_RegisterAndGetTasks(benchmark::State& state) {
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while (state.KeepRunning()) {
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auto task_queue = fml::MessageLoopTaskQueues::GetInstance();
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const int num_task_queues = 10;
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const int num_tasks_per_queue = 100;
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const fml::TimePoint past = fml::TimePoint::Now();
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for (int i = 0; i < num_task_queues; i++) {
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task_queue->CreateTaskQueue();
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}
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std::vector<std::thread> threads;
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CountDownLatch tasks_registered(num_task_queues);
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CountDownLatch tasks_done(num_task_queues);
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for (int i = 0; i < num_task_queues; i++) {
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threads.emplace_back([task_runner_id = i, &task_queue, past, &tasks_done,
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&tasks_registered]() {
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for (int j = 0; j < num_tasks_per_queue; j++) {
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task_queue->RegisterTask(
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TaskQueueId(task_runner_id), [] {}, past);
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}
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tasks_registered.CountDown();
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tasks_registered.Wait();
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std::vector<fml::closure> invocations;
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task_queue->GetTasksToRunNow(TaskQueueId(task_runner_id),
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fml::FlushType::kAll, invocations);
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assert(invocations.size() == num_tasks_per_queue);
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tasks_done.CountDown();
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});
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}
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tasks_done.Wait();
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for (auto& thread : threads) {
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thread.join();
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}
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}
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}
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BENCHMARK(BM_RegisterAndGetTasks);
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} // namespace benchmarking
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} // namespace fml
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