libuv-svace-build

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/* 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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struct async_container {
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  unsigned async_events;
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  unsigned handles_seen;
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  uv_async_t async_handles[1024 * 1024];
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};
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static volatile int done;
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static uv_thread_t thread_id;
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static struct async_container* container;
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static unsigned fastrand(void) {
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  static unsigned g = 0;
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  g = g * 214013 + 2531011;
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  return g;
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}
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static void thread_cb(void* arg) {
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  unsigned i;
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  while (done == 0) {
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    i = fastrand() % ARRAY_SIZE(container->async_handles);
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    uv_async_send(container->async_handles + i);
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  }
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}
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static void async_cb(uv_async_t* handle) {
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  container->async_events++;
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  handle->data = handle;
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}
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static void timer_cb(uv_timer_t* handle) {
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  unsigned i;
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  done = 1;
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  ASSERT_OK(uv_thread_join(&thread_id));
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  for (i = 0; i < ARRAY_SIZE(container->async_handles); i++) {
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    uv_async_t* handle = container->async_handles + i;
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    if (handle->data != NULL)
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      container->handles_seen++;
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    uv_close((uv_handle_t*) handle, NULL);
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  }
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  uv_close((uv_handle_t*) handle, NULL);
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}
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BENCHMARK_IMPL(million_async) {
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  char fmtbuf[3][32];
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  uv_timer_t timer_handle;
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  uv_async_t* handle;
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  uv_loop_t* loop;
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  int timeout;
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  unsigned i;
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  loop = uv_default_loop();
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  timeout = 5000;
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  container = malloc(sizeof(*container));
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  ASSERT_NOT_NULL(container);
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  container->async_events = 0;
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  container->handles_seen = 0;
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  for (i = 0; i < ARRAY_SIZE(container->async_handles); i++) {
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    handle = container->async_handles + i;
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    ASSERT_OK(uv_async_init(loop, handle, async_cb));
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    handle->data = NULL;
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  }
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  ASSERT_OK(uv_timer_init(loop, &timer_handle));
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  ASSERT_OK(uv_timer_start(&timer_handle, timer_cb, timeout, 0));
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  ASSERT_OK(uv_thread_create(&thread_id, thread_cb, NULL));
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  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
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  printf("%s async events in %.1f seconds (%s/s, %s unique handles seen)\n",
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          fmt(&fmtbuf[0], container->async_events),
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          timeout / 1000.,
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          fmt(&fmtbuf[1], container->async_events / (timeout / 1000.)),
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          fmt(&fmtbuf[2], container->handles_seen));
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  free(container);
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  MAKE_VALGRIND_HAPPY(loop);
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  return 0;
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}
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