fml::benchmarking Namespace Reference

Functions
static void	BM_RegisterAndGetTasks (benchmark::State &state)
	BENCHMARK (BM_RegisterAndGetTasks)

Function Documentation

BENCHMARK()

fml::benchmarking::BENCHMARK

(

BM_RegisterAndGetTasks

)

BM_RegisterAndGetTasks()

static void fml::benchmarking::BM_RegisterAndGetTasks ( benchmark::State &  state )

static

Definition at line 18 of file message_loop_task_queues_benchmark.cc.

                                                          {  // NOLINT
  while (state.KeepRunning()) {
    auto task_queue = fml::MessageLoopTaskQueues::GetInstance();
 
    const int num_task_queues = 10;
    const int num_tasks_per_queue = 100;
    const fml::TimePoint past = fml::TimePoint::Now();
 
    for (int i = 0; i < num_task_queues; i++) {
      task_queue->CreateTaskQueue();
    }
 
    std::vector<std::thread> threads;
 
    CountDownLatch tasks_registered(num_task_queues);
    CountDownLatch tasks_done(num_task_queues);
 
    threads.reserve(num_task_queues);
    for (int i = 0; i < num_task_queues; i++) {
      threads.emplace_back([task_runner_id = i, &task_queue, past, &tasks_done,
                            &tasks_registered]() {
        for (int j = 0; j < num_tasks_per_queue; j++) {
          task_queue->RegisterTask(TaskQueueId(task_runner_id), [] {}, past);
        }
        tasks_registered.CountDown();
        tasks_registered.Wait();
        const auto now = fml::TimePoint::Now();
        int num_invocations = 0;
        for (;;) {
          fml::closure invocation =
              task_queue->GetNextTaskToRun(TaskQueueId(task_runner_id), now);
          if (!invocation) {
            break;
          }
          num_invocations++;
        }
        assert(num_invocations == num_tasks_per_queue);
        tasks_done.CountDown();
      });
    }
 
    tasks_done.Wait();
 
    for (auto& thread : threads) {
      thread.join();
    }
  }
}