| /* Copyright Joyent, Inc. and other Node contributors. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include "task.h" |
| #include "uv.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #define NUM_PINGS (1000 * 1000) |
| #define ACCESS_ONCE(type, var) (*(volatile type*) &(var)) |
| |
| static unsigned int callbacks; |
| static volatile int done; |
| |
| static const char running[] = "running"; |
| static const char stop[] = "stop"; |
| static const char stopped[] = "stopped"; |
| |
| |
| static void async_cb(uv_async_t* handle, int status) { |
| if (++callbacks == NUM_PINGS) { |
| /* Tell the pummel thread to stop. */ |
| ACCESS_ONCE(const char*, handle->data) = stop; |
| |
| /* Wait for for the pummel thread to acknowledge that it has stoppped. */ |
| while (ACCESS_ONCE(const char*, handle->data) != stopped) |
| uv_sleep(0); |
| |
| uv_close((uv_handle_t*) handle, NULL); |
| } |
| } |
| |
| |
| static void pummel(void* arg) { |
| uv_async_t* handle = (uv_async_t*) arg; |
| |
| while (ACCESS_ONCE(const char*, handle->data) == running) |
| uv_async_send(handle); |
| |
| /* Acknowledge that we've seen handle->data change. */ |
| ACCESS_ONCE(const char*, handle->data) = stopped; |
| } |
| |
| |
| static int test_async_pummel(int nthreads) { |
| uv_thread_t* tids; |
| uv_async_t handle; |
| uint64_t time; |
| int i; |
| |
| tids = calloc(nthreads, sizeof(tids[0])); |
| ASSERT(tids != NULL); |
| |
| ASSERT(0 == uv_async_init(uv_default_loop(), &handle, async_cb)); |
| ACCESS_ONCE(const char*, handle.data) = running; |
| |
| for (i = 0; i < nthreads; i++) |
| ASSERT(0 == uv_thread_create(tids + i, pummel, &handle)); |
| |
| time = uv_hrtime(); |
| |
| ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT)); |
| |
| time = uv_hrtime() - time; |
| done = 1; |
| |
| for (i = 0; i < nthreads; i++) |
| ASSERT(0 == uv_thread_join(tids + i)); |
| |
| printf("async_pummel_%d: %s callbacks in %.2f seconds (%s/sec)\n", |
| nthreads, |
| fmt(callbacks), |
| time / 1e9, |
| fmt(callbacks / (time / 1e9))); |
| |
| free(tids); |
| |
| MAKE_VALGRIND_HAPPY(); |
| return 0; |
| } |
| |
| |
| BENCHMARK_IMPL(async_pummel_1) { |
| return test_async_pummel(1); |
| } |
| |
| |
| BENCHMARK_IMPL(async_pummel_2) { |
| return test_async_pummel(2); |
| } |
| |
| |
| BENCHMARK_IMPL(async_pummel_4) { |
| return test_async_pummel(4); |
| } |
| |
| |
| BENCHMARK_IMPL(async_pummel_8) { |
| return test_async_pummel(8); |
| } |