1 /* Copyright libuv project 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 "uv.h"
23 #include "task.h"
24 #include <string.h> /* memset */
25
26 #define UV_NS_TO_MS 1000000
27
28
timer_spin_cb(uv_timer_t * handle)29 static void timer_spin_cb(uv_timer_t* handle) {
30 uint64_t t;
31
32 (*(int*) handle->data)++;
33 t = uv_hrtime();
34 /* Spin for 500 ms to spin loop time out of the delta check. */
35 while (uv_hrtime() - t < 600 * UV_NS_TO_MS) { }
36 }
37
38
TEST_IMPL(metrics_idle_time)39 TEST_IMPL(metrics_idle_time) {
40 const uint64_t timeout = 1000;
41 uv_timer_t timer;
42 uint64_t idle_time;
43 int cntr;
44
45 cntr = 0;
46 timer.data = &cntr;
47
48 ASSERT_EQ(0, uv_loop_configure(uv_default_loop(), UV_METRICS_IDLE_TIME));
49 ASSERT_EQ(0, uv_timer_init(uv_default_loop(), &timer));
50 ASSERT_EQ(0, uv_timer_start(&timer, timer_spin_cb, timeout, 0));
51
52 ASSERT_EQ(0, uv_run(uv_default_loop(), UV_RUN_DEFAULT));
53 ASSERT_GT(cntr, 0);
54
55 idle_time = uv_metrics_idle_time(uv_default_loop());
56
57 /* Permissive check that the idle time matches within the timeout ±500 ms. */
58 ASSERT((idle_time <= (timeout + 500) * UV_NS_TO_MS) &&
59 (idle_time >= (timeout - 500) * UV_NS_TO_MS));
60
61 MAKE_VALGRIND_HAPPY();
62 return 0;
63 }
64
65
metrics_routine_cb(void * arg)66 static void metrics_routine_cb(void* arg) {
67 const uint64_t timeout = 1000;
68 uv_loop_t loop;
69 uv_timer_t timer;
70 uint64_t idle_time;
71 int cntr;
72
73 cntr = 0;
74 timer.data = &cntr;
75
76 ASSERT_EQ(0, uv_loop_init(&loop));
77 ASSERT_EQ(0, uv_loop_configure(&loop, UV_METRICS_IDLE_TIME));
78 ASSERT_EQ(0, uv_timer_init(&loop, &timer));
79 ASSERT_EQ(0, uv_timer_start(&timer, timer_spin_cb, timeout, 0));
80
81 ASSERT_EQ(0, uv_run(&loop, UV_RUN_DEFAULT));
82 ASSERT_GT(cntr, 0);
83
84 idle_time = uv_metrics_idle_time(&loop);
85
86 /* Only checking that idle time is greater than the lower bound since there
87 * may have been thread contention, causing the event loop to be delayed in
88 * the idle phase longer than expected.
89 */
90 ASSERT_GE(idle_time, (timeout - 500) * UV_NS_TO_MS);
91
92 close_loop(&loop);
93 ASSERT_EQ(0, uv_loop_close(&loop));
94 }
95
96
TEST_IMPL(metrics_idle_time_thread)97 TEST_IMPL(metrics_idle_time_thread) {
98 uv_thread_t threads[5];
99 int i;
100
101 for (i = 0; i < 5; i++) {
102 ASSERT_EQ(0, uv_thread_create(&threads[i], metrics_routine_cb, NULL));
103 }
104
105 for (i = 0; i < 5; i++) {
106 uv_thread_join(&threads[i]);
107 }
108
109 return 0;
110 }
111
112
timer_noop_cb(uv_timer_t * handle)113 static void timer_noop_cb(uv_timer_t* handle) {
114 (*(int*) handle->data)++;
115 }
116
117
TEST_IMPL(metrics_idle_time_zero)118 TEST_IMPL(metrics_idle_time_zero) {
119 uv_timer_t timer;
120 int cntr;
121
122 cntr = 0;
123 timer.data = &cntr;
124 ASSERT_EQ(0, uv_loop_configure(uv_default_loop(), UV_METRICS_IDLE_TIME));
125 ASSERT_EQ(0, uv_timer_init(uv_default_loop(), &timer));
126 ASSERT_EQ(0, uv_timer_start(&timer, timer_noop_cb, 0, 0));
127
128 ASSERT_EQ(0, uv_run(uv_default_loop(), UV_RUN_DEFAULT));
129
130 ASSERT_GT(cntr, 0);
131 ASSERT_EQ(0, uv_metrics_idle_time(uv_default_loop()));
132
133 MAKE_VALGRIND_HAPPY();
134 return 0;
135 }
136