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
25 #include <stdio.h>
26 #include <stdlib.h>
27
28 #define NUM_PINGS (1000 * 1000)
29
30 struct ctx {
31 uv_loop_t loop;
32 uv_thread_t thread;
33 uv_async_t main_async; /* wake up main thread */
34 uv_async_t worker_async; /* wake up worker */
35 unsigned int nthreads;
36 unsigned int main_sent;
37 unsigned int main_seen;
38 unsigned int worker_sent;
39 unsigned int worker_seen;
40 };
41
42
worker_async_cb(uv_async_t * handle)43 static void worker_async_cb(uv_async_t* handle) {
44 struct ctx* ctx = container_of(handle, struct ctx, worker_async);
45
46 ASSERT(0 == uv_async_send(&ctx->main_async));
47 ctx->worker_sent++;
48 ctx->worker_seen++;
49
50 if (ctx->worker_sent >= NUM_PINGS)
51 uv_close((uv_handle_t*) &ctx->worker_async, NULL);
52 }
53
54
main_async_cb(uv_async_t * handle)55 static void main_async_cb(uv_async_t* handle) {
56 struct ctx* ctx = container_of(handle, struct ctx, main_async);
57
58 ASSERT(0 == uv_async_send(&ctx->worker_async));
59 ctx->main_sent++;
60 ctx->main_seen++;
61
62 if (ctx->main_sent >= NUM_PINGS)
63 uv_close((uv_handle_t*) &ctx->main_async, NULL);
64 }
65
66
worker(void * arg)67 static void worker(void* arg) {
68 struct ctx* ctx = arg;
69 ASSERT(0 == uv_async_send(&ctx->main_async));
70 ASSERT(0 == uv_run(&ctx->loop, UV_RUN_DEFAULT));
71 uv_loop_close(&ctx->loop);
72 }
73
74
test_async(int nthreads)75 static int test_async(int nthreads) {
76 struct ctx* threads;
77 struct ctx* ctx;
78 uint64_t time;
79 int i;
80
81 threads = calloc(nthreads, sizeof(threads[0]));
82 ASSERT_NOT_NULL(threads);
83
84 for (i = 0; i < nthreads; i++) {
85 ctx = threads + i;
86 ctx->nthreads = nthreads;
87 ASSERT(0 == uv_loop_init(&ctx->loop));
88 ASSERT(0 == uv_async_init(&ctx->loop, &ctx->worker_async, worker_async_cb));
89 ASSERT(0 == uv_async_init(uv_default_loop(),
90 &ctx->main_async,
91 main_async_cb));
92 ASSERT(0 == uv_thread_create(&ctx->thread, worker, ctx));
93 }
94
95 time = uv_hrtime();
96
97 ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT));
98
99 for (i = 0; i < nthreads; i++)
100 ASSERT(0 == uv_thread_join(&threads[i].thread));
101
102 time = uv_hrtime() - time;
103
104 for (i = 0; i < nthreads; i++) {
105 ctx = threads + i;
106 ASSERT(ctx->worker_sent == NUM_PINGS);
107 ASSERT(ctx->worker_seen == NUM_PINGS);
108 ASSERT(ctx->main_sent == (unsigned int) NUM_PINGS);
109 ASSERT(ctx->main_seen == (unsigned int) NUM_PINGS);
110 }
111
112 printf("async%d: %.2f sec (%s/sec)\n",
113 nthreads,
114 time / 1e9,
115 fmt(NUM_PINGS / (time / 1e9)));
116
117 free(threads);
118
119 MAKE_VALGRIND_HAPPY();
120 return 0;
121 }
122
123
BENCHMARK_IMPL(async1)124 BENCHMARK_IMPL(async1) {
125 return test_async(1);
126 }
127
128
BENCHMARK_IMPL(async2)129 BENCHMARK_IMPL(async2) {
130 return test_async(2);
131 }
132
133
BENCHMARK_IMPL(async4)134 BENCHMARK_IMPL(async4) {
135 return test_async(4);
136 }
137
138
BENCHMARK_IMPL(async8)139 BENCHMARK_IMPL(async8) {
140 return test_async(8);
141 }
142