| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <zircon/syscalls.h> |
| |
| #include <stdio.h> |
| |
| #include <async/loop.h> |
| #include <async/task.h> |
| #include <trace-provider/provider.h> |
| #include <trace/event.h> |
| |
| namespace { |
| |
| zx_time_t now() { |
| return zx_time_get(ZX_CLOCK_MONOTONIC); |
| } |
| |
| } // namespace |
| |
| int main(int argc, char** argv) { |
| async::Loop loop; |
| trace::TraceProvider provider(loop.async()); |
| |
| puts("Starting Benchmark..."); |
| |
| zx_time_t start_time = now(); |
| zx_time_t quit_time = start_time + ZX_SEC(2); |
| async::Task task(start_time); |
| // This async task runs for two seconds until `quit_time` is reached. |
| task.set_handler([&task, &loop, quit_time](async_t* async, zx_status_t status) { |
| // `task_start` and `task_end` are used to measure the time between |
| // `example` benchmarks. This is measured with a `time_between` |
| // measurement type. |
| TRACE_INSTANT("benchmark", "task_start", TRACE_SCOPE_PROCESS); |
| |
| // An `example` benchmark measured with a `duration` measurement type. |
| TRACE_DURATION("benchmark", "example"); |
| |
| // Simulate some kind of workload. |
| zx_nanosleep(now() + ZX_MSEC(10)); |
| |
| // Stop if quitting. |
| if (task.deadline() > quit_time) { |
| loop.Quit(); |
| return ASYNC_TASK_FINISHED; |
| } |
| |
| // Schedule another benchmark. |
| task.set_deadline(now() + ZX_MSEC(5)); |
| TRACE_INSTANT("benchmark", "task_end", TRACE_SCOPE_PROCESS); |
| return ASYNC_TASK_REPEAT; |
| }); |
| |
| task.Post(loop.async()); |
| |
| loop.Run(); |
| |
| puts("Finished."); |
| return 0; |
| } |