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comparison third_party/libuv/test/test-metrics.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 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 typedef struct {
29 uv_fs_t open_req;
30 uv_fs_t write_req;
31 uv_fs_t close_req;
32 } fs_reqs_t;
33
34 static uint64_t last_events_count;
35 static char test_buf[] = "test-buffer\n";
36 static fs_reqs_t fs_reqs;
37 static int pool_events_counter;
38
39
40 static void timer_spin_cb(uv_timer_t* handle) {
41 uint64_t t;
42
43 (*(int*) handle->data)++;
44 t = uv_hrtime();
45 /* Spin for 500 ms to spin loop time out of the delta check. */
46 while (uv_hrtime() - t < 600 * UV_NS_TO_MS) { }
47 }
48
49
50 TEST_IMPL(metrics_idle_time) {
51 #if defined(__OpenBSD__)
52 RETURN_SKIP("Test does not currently work in OpenBSD");
53 #endif
54 const uint64_t timeout = 1000;
55 uv_timer_t timer;
56 uint64_t idle_time;
57 int cntr;
58
59 cntr = 0;
60 timer.data = &cntr;
61
62 ASSERT_OK(uv_loop_configure(uv_default_loop(), UV_METRICS_IDLE_TIME));
63 ASSERT_OK(uv_timer_init(uv_default_loop(), &timer));
64 ASSERT_OK(uv_timer_start(&timer, timer_spin_cb, timeout, 0));
65
66 ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
67 ASSERT_GT(cntr, 0);
68
69 idle_time = uv_metrics_idle_time(uv_default_loop());
70
71 /* Permissive check that the idle time matches within the timeout ±500 ms. */
72 ASSERT_LE(idle_time, (timeout + 500) * UV_NS_TO_MS);
73 ASSERT_GE(idle_time, (timeout - 500) * UV_NS_TO_MS);
74
75 MAKE_VALGRIND_HAPPY(uv_default_loop());
76 return 0;
77 }
78
79
80 static void metrics_routine_cb(void* arg) {
81 const uint64_t timeout = 1000;
82 uv_loop_t loop;
83 uv_timer_t timer;
84 uint64_t idle_time;
85 int cntr;
86
87 cntr = 0;
88 timer.data = &cntr;
89
90 ASSERT_OK(uv_loop_init(&loop));
91 ASSERT_OK(uv_loop_configure(&loop, UV_METRICS_IDLE_TIME));
92 ASSERT_OK(uv_timer_init(&loop, &timer));
93 ASSERT_OK(uv_timer_start(&timer, timer_spin_cb, timeout, 0));
94
95 ASSERT_OK(uv_run(&loop, UV_RUN_DEFAULT));
96 ASSERT_GT(cntr, 0);
97
98 idle_time = uv_metrics_idle_time(&loop);
99
100 /* Only checking that idle time is greater than the lower bound since there
101 * may have been thread contention, causing the event loop to be delayed in
102 * the idle phase longer than expected.
103 */
104 ASSERT_GE(idle_time, (timeout - 500) * UV_NS_TO_MS);
105
106 close_loop(&loop);
107 ASSERT_OK(uv_loop_close(&loop));
108 }
109
110
111 TEST_IMPL(metrics_idle_time_thread) {
112 uv_thread_t threads[5];
113 int i;
114
115 for (i = 0; i < 5; i++) {
116 ASSERT_OK(uv_thread_create(&threads[i], metrics_routine_cb, NULL));
117 }
118
119 for (i = 0; i < 5; i++) {
120 uv_thread_join(&threads[i]);
121 }
122
123 return 0;
124 }
125
126
127 static void timer_noop_cb(uv_timer_t* handle) {
128 (*(int*) handle->data)++;
129 }
130
131
132 TEST_IMPL(metrics_idle_time_zero) {
133 uv_metrics_t metrics;
134 uv_timer_t timer;
135 int cntr;
136
137 cntr = 0;
138 timer.data = &cntr;
139 ASSERT_OK(uv_loop_configure(uv_default_loop(), UV_METRICS_IDLE_TIME));
140 ASSERT_OK(uv_timer_init(uv_default_loop(), &timer));
141 ASSERT_OK(uv_timer_start(&timer, timer_noop_cb, 0, 0));
142
143 ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
144
145 ASSERT_GT(cntr, 0);
146 ASSERT_OK(uv_metrics_idle_time(uv_default_loop()));
147
148 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
149 ASSERT_UINT64_EQ(cntr, metrics.loop_count);
150
151 MAKE_VALGRIND_HAPPY(uv_default_loop());
152 return 0;
153 }
154
155
156 static void close_cb(uv_fs_t* req) {
157 uv_metrics_t metrics;
158
159 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
160 ASSERT_UINT64_EQ(3, metrics.loop_count);
161 ASSERT_UINT64_GT(metrics.events, last_events_count);
162
163 uv_fs_req_cleanup(req);
164 last_events_count = metrics.events;
165 }
166
167
168 static void write_cb(uv_fs_t* req) {
169 uv_metrics_t metrics;
170
171 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
172 ASSERT_UINT64_EQ(2, metrics.loop_count);
173 ASSERT_UINT64_GT(metrics.events, last_events_count);
174 ASSERT_EQ(req->result, sizeof(test_buf));
175
176 uv_fs_req_cleanup(req);
177 last_events_count = metrics.events;
178
179 ASSERT_OK(uv_fs_close(uv_default_loop(),
180 &fs_reqs.close_req,
181 fs_reqs.open_req.result,
182 close_cb));
183 }
184
185
186 static void create_cb(uv_fs_t* req) {
187 uv_metrics_t metrics;
188
189 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
190 /* Event count here is still 0 so not going to check. */
191 ASSERT_UINT64_EQ(1, metrics.loop_count);
192 ASSERT_GE(req->result, 0);
193
194 uv_fs_req_cleanup(req);
195 last_events_count = metrics.events;
196
197 uv_buf_t iov = uv_buf_init(test_buf, sizeof(test_buf));
198 ASSERT_OK(uv_fs_write(uv_default_loop(),
199 &fs_reqs.write_req,
200 req->result,
201 &iov,
202 1,
203 0,
204 write_cb));
205 }
206
207
208 static void prepare_cb(uv_prepare_t* handle) {
209 uv_metrics_t metrics;
210
211 uv_prepare_stop(handle);
212
213 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
214 ASSERT_UINT64_EQ(0, metrics.loop_count);
215 ASSERT_UINT64_EQ(0, metrics.events);
216
217 ASSERT_OK(uv_fs_open(uv_default_loop(),
218 &fs_reqs.open_req,
219 "test_file",
220 UV_FS_O_WRONLY | UV_FS_O_CREAT, S_IRUSR | S_IWUSR,
221 create_cb));
222 }
223
224
225 TEST_IMPL(metrics_info_check) {
226 uv_fs_t unlink_req;
227 uv_prepare_t prepare;
228
229 uv_fs_unlink(NULL, &unlink_req, "test_file", NULL);
230 uv_fs_req_cleanup(&unlink_req);
231
232 ASSERT_OK(uv_prepare_init(uv_default_loop(), &prepare));
233 ASSERT_OK(uv_prepare_start(&prepare, prepare_cb));
234
235 ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
236
237 uv_fs_unlink(NULL, &unlink_req, "test_file", NULL);
238 uv_fs_req_cleanup(&unlink_req);
239
240 MAKE_VALGRIND_HAPPY(uv_default_loop());
241 return 0;
242 }
243
244
245 static void fs_prepare_cb(uv_prepare_t* handle) {
246 uv_metrics_t metrics;
247
248 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
249
250 if (pool_events_counter == 1)
251 ASSERT_EQ(metrics.events, metrics.events_waiting);
252
253 if (pool_events_counter < 7)
254 return;
255
256 uv_prepare_stop(handle);
257 pool_events_counter = -42;
258 }
259
260
261 static void fs_stat_cb(uv_fs_t* req) {
262 uv_fs_req_cleanup(req);
263 pool_events_counter++;
264 }
265
266
267 static void fs_work_cb(uv_work_t* req) {
268 }
269
270
271 static void fs_after_work_cb(uv_work_t* req, int status) {
272 free(req);
273 pool_events_counter++;
274 }
275
276
277 static void fs_write_cb(uv_fs_t* req) {
278 uv_work_t* work1 = malloc(sizeof(*work1));
279 uv_work_t* work2 = malloc(sizeof(*work2));
280 pool_events_counter++;
281
282 uv_fs_req_cleanup(req);
283
284 ASSERT_OK(uv_queue_work(uv_default_loop(),
285 work1,
286 fs_work_cb,
287 fs_after_work_cb));
288 ASSERT_OK(uv_queue_work(uv_default_loop(),
289 work2,
290 fs_work_cb,
291 fs_after_work_cb));
292 }
293
294
295 static void fs_random_cb(uv_random_t* req, int status, void* buf, size_t len) {
296 pool_events_counter++;
297 }
298
299
300 static void fs_addrinfo_cb(uv_getaddrinfo_t* req,
301 int status,
302 struct addrinfo* res) {
303 uv_freeaddrinfo(req->addrinfo);
304 pool_events_counter++;
305 }
306
307
308 TEST_IMPL(metrics_pool_events) {
309 uv_buf_t iov;
310 uv_fs_t open_req;
311 uv_fs_t stat1_req;
312 uv_fs_t stat2_req;
313 uv_fs_t unlink_req;
314 uv_fs_t write_req;
315 uv_getaddrinfo_t addrinfo_req;
316 uv_metrics_t metrics;
317 uv_prepare_t prepare;
318 uv_random_t random_req;
319 int fd;
320 char rdata;
321
322 ASSERT_OK(uv_loop_configure(uv_default_loop(), UV_METRICS_IDLE_TIME));
323
324 uv_fs_unlink(NULL, &unlink_req, "test_file", NULL);
325 uv_fs_req_cleanup(&unlink_req);
326
327 ASSERT_OK(uv_prepare_init(uv_default_loop(), &prepare));
328 ASSERT_OK(uv_prepare_start(&prepare, fs_prepare_cb));
329
330 pool_events_counter = 0;
331 fd = uv_fs_open(NULL,
332 &open_req, "test_file", UV_FS_O_WRONLY | UV_FS_O_CREAT,
333 S_IRUSR | S_IWUSR,
334 NULL);
335 ASSERT_GT(fd, 0);
336 uv_fs_req_cleanup(&open_req);
337
338 iov = uv_buf_init(test_buf, sizeof(test_buf));
339 ASSERT_OK(uv_fs_write(uv_default_loop(),
340 &write_req,
341 fd,
342 &iov,
343 1,
344 0,
345 fs_write_cb));
346 ASSERT_OK(uv_fs_stat(uv_default_loop(),
347 &stat1_req,
348 "test_file",
349 fs_stat_cb));
350 ASSERT_OK(uv_fs_stat(uv_default_loop(),
351 &stat2_req,
352 "test_file",
353 fs_stat_cb));
354 ASSERT_OK(uv_random(uv_default_loop(),
355 &random_req,
356 &rdata,
357 1,
358 0,
359 fs_random_cb));
360 ASSERT_OK(uv_getaddrinfo(uv_default_loop(),
361 &addrinfo_req,
362 fs_addrinfo_cb,
363 "example.invalid",
364 NULL,
365 NULL));
366
367 /* Sleep for a moment to hopefully force the events to complete before
368 * entering the event loop. */
369 uv_sleep(100);
370
371 ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
372
373 ASSERT_OK(uv_metrics_info(uv_default_loop(), &metrics));
374 /* It's possible for uv__work_done() to execute one extra time even though the
375 * QUEUE has already been cleared out. This has to do with the way we use an
376 * uv_async to tell the event loop thread to process the worker pool QUEUE. */
377 ASSERT_GE(metrics.events, 7);
378 /* It's possible one of the other events also got stuck in the event queue, so
379 * check GE instead of EQ. Reason for 4 instead of 5 is because the call to
380 * uv_getaddrinfo() is racey and slow. So can't guarantee that it'll always
381 * execute before sleep completes. */
382 ASSERT_GE(metrics.events_waiting, 4);
383 ASSERT_EQ(pool_events_counter, -42);
384
385 uv_fs_unlink(NULL, &unlink_req, "test_file", NULL);
386 uv_fs_req_cleanup(&unlink_req);
387
388 MAKE_VALGRIND_HAPPY(uv_default_loop());
389 return 0;
390 }