Annotation of src/external/mit/libuv/dist/test/benchmark-async.c, Revision 1.1.1.2
1.1 christos 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:
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:
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:
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:
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]));
1.1.1.2 ! christos 82: ASSERT_NOT_NULL(threads);
1.1 christos 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:
124: BENCHMARK_IMPL(async1) {
125: return test_async(1);
126: }
127:
128:
129: BENCHMARK_IMPL(async2) {
130: return test_async(2);
131: }
132:
133:
134: BENCHMARK_IMPL(async4) {
135: return test_async(4);
136: }
137:
138:
139: BENCHMARK_IMPL(async8) {
140: return test_async(8);
141: }
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