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comparison third_party/libuv/test/benchmark-loop-count.c @ 160:948de3f54cea

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[ThirdParty] Added libuv
author June Park <parkjune1995@gmail.com>
date Wed, 14 Jan 2026 19:39:52 -0800
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159:05cf9467a1c3 160:948de3f54cea
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_TICKS (2 * 1000 * 1000)
29 #define NUM_TICKS2 (2 * 1000 * 1000 * 100)
30
31 static unsigned long ticks;
32 static uv_idle_t idle_handle;
33 static uv_timer_t timer_handle;
34
35
36 static void idle_cb(uv_idle_t* handle) {
37 if (++ticks == NUM_TICKS)
38 uv_idle_stop(handle);
39 }
40
41 static void idle_alive_cb(uv_idle_t* handle) {
42 int ticks = 0;
43
44 while (++ticks < NUM_TICKS2) {
45 int r = uv_loop_alive(handle->loop);
46 if (r == 0)
47 abort();
48 }
49
50 *(int*)handle->data = ticks;
51 uv_idle_stop(handle);
52 }
53
54
55 static void idle2_cb(uv_idle_t* handle) {
56 ticks++;
57 }
58
59
60 static void timer_cb(uv_timer_t* handle) {
61 uv_idle_stop(&idle_handle);
62 uv_timer_stop(&timer_handle);
63 }
64
65
66 BENCHMARK_IMPL(loop_count) {
67 uv_loop_t* loop = uv_default_loop();
68 uint64_t ns;
69
70 uv_idle_init(loop, &idle_handle);
71 uv_idle_start(&idle_handle, idle_cb);
72
73 ns = uv_hrtime();
74 uv_run(loop, UV_RUN_DEFAULT);
75 ns = uv_hrtime() - ns;
76
77 ASSERT_UINT64_EQ(ticks, NUM_TICKS);
78
79 fprintf(stderr, "loop_count: %d ticks in %.2fs (%.0f/s)\n",
80 NUM_TICKS,
81 ns / 1e9,
82 NUM_TICKS / (ns / 1e9));
83 fflush(stderr);
84
85 MAKE_VALGRIND_HAPPY(loop);
86 return 0;
87 }
88
89
90 BENCHMARK_IMPL(loop_count_timed) {
91 uv_loop_t* loop = uv_default_loop();
92
93 uv_idle_init(loop, &idle_handle);
94 uv_idle_start(&idle_handle, idle2_cb);
95
96 uv_timer_init(loop, &timer_handle);
97 uv_timer_start(&timer_handle, timer_cb, 5000, 0);
98
99 uv_run(loop, UV_RUN_DEFAULT);
100
101 fprintf(stderr, "loop_count: %lu ticks (%.0f ticks/s)\n", ticks, ticks / 5.0);
102 fflush(stderr);
103
104 MAKE_VALGRIND_HAPPY(loop);
105 return 0;
106 }
107
108 /* Measure the performance of running uv_loop_alive(). Adding this so we can get
109 * some sort of metric for the impact of switching active_reqs.count to use
110 * atomics. No other code sits in a hot path. */
111 BENCHMARK_IMPL(loop_alive) {
112 uv_loop_t* loop = uv_default_loop();
113 int ticks = 0;
114 uint64_t ns;
115
116 uv_idle_init(loop, &idle_handle);
117 idle_handle.data = &ticks;
118 uv_idle_start(&idle_handle, idle_alive_cb);
119
120 ns = uv_hrtime();
121 uv_run(loop, UV_RUN_DEFAULT);
122 ns = uv_hrtime() - ns;
123
124 ASSERT_EQ(ticks, NUM_TICKS2);
125
126 fprintf(stderr, "loop_alive: %d ticks in %.2fs (%.0f/s)\n",
127 NUM_TICKS2,
128 ns / 1e9,
129 NUM_TICKS2 / (ns / 1e9));
130 fflush(stderr);
131
132 MAKE_VALGRIND_HAPPY(loop);
133 return 0;
134 }