1/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "task.h"
23#include "uv.h"
24
25struct async_container {
26  unsigned async_events;
27  unsigned handles_seen;
28  uv_async_t async_handles[1024 * 1024];
29};
30
31static volatile int done;
32static uv_thread_t thread_id;
33static struct async_container* container;
34
35
36static unsigned fastrand(void) {
37  static unsigned g = 0;
38  g = g * 214013 + 2531011;
39  return g;
40}
41
42
43static void thread_cb(void* arg) {
44  unsigned i;
45
46  while (done == 0) {
47    i = fastrand() % ARRAY_SIZE(container->async_handles);
48    uv_async_send(container->async_handles + i);
49  }
50}
51
52
53static void async_cb(uv_async_t* handle) {
54  container->async_events++;
55  handle->data = handle;
56}
57
58
59static void timer_cb(uv_timer_t* handle) {
60  unsigned i;
61
62  done = 1;
63  ASSERT_OK(uv_thread_join(&thread_id));
64
65  for (i = 0; i < ARRAY_SIZE(container->async_handles); i++) {
66    uv_async_t* handle = container->async_handles + i;
67
68    if (handle->data != NULL)
69      container->handles_seen++;
70
71    uv_close((uv_handle_t*) handle, NULL);
72  }
73
74  uv_close((uv_handle_t*) handle, NULL);
75}
76
77
78BENCHMARK_IMPL(million_async) {
79  char fmtbuf[3][32];
80  uv_timer_t timer_handle;
81  uv_async_t* handle;
82  uv_loop_t* loop;
83  int timeout;
84  unsigned i;
85
86  loop = uv_default_loop();
87  timeout = 5000;
88
89  container = malloc(sizeof(*container));
90  ASSERT_NOT_NULL(container);
91  container->async_events = 0;
92  container->handles_seen = 0;
93
94  for (i = 0; i < ARRAY_SIZE(container->async_handles); i++) {
95    handle = container->async_handles + i;
96    ASSERT_OK(uv_async_init(loop, handle, async_cb));
97    handle->data = NULL;
98  }
99
100  ASSERT_OK(uv_timer_init(loop, &timer_handle));
101  ASSERT_OK(uv_timer_start(&timer_handle, timer_cb, timeout, 0));
102  ASSERT_OK(uv_thread_create(&thread_id, thread_cb, NULL));
103  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
104  printf("%s async events in %.1f seconds (%s/s, %s unique handles seen)\n",
105          fmt(&fmtbuf[0], container->async_events),
106          timeout / 1000.,
107          fmt(&fmtbuf[1], container->async_events / (timeout / 1000.)),
108          fmt(&fmtbuf[2], container->handles_seen));
109  free(container);
110
111  MAKE_VALGRIND_HAPPY(loop);
112  return 0;
113}
114