From cc24a339d8c0517259084b5c178d784626ba965c Mon Sep 17 00:00:00 2001 From: ImJezze Date: Sun, 21 Feb 2016 11:48:45 +0100 Subject: Merge remote-tracking branch 'refs/remotes/mamedev/master' Second attempt --- 3rdparty/libuv/test/benchmark-async-pummel.c | 119 +++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 3rdparty/libuv/test/benchmark-async-pummel.c (limited to '3rdparty/libuv/test/benchmark-async-pummel.c') diff --git a/3rdparty/libuv/test/benchmark-async-pummel.c b/3rdparty/libuv/test/benchmark-async-pummel.c new file mode 100644 index 00000000000..cca3de1062b --- /dev/null +++ b/3rdparty/libuv/test/benchmark-async-pummel.c @@ -0,0 +1,119 @@ +/* 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 +#include + +#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) { + 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); +} -- cgit v1.2.3-70-g09d2