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