Commit | Line | Data |
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10c48e14 MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6982d6d7 | 6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
10c48e14 MD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
22 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
f5ab766e | 24 | #include "config.h" |
10c48e14 MD |
25 | #include <stdio.h> |
26 | #include <pthread.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | #include <unistd.h> | |
32 | #include <stdio.h> | |
33 | #include <assert.h> | |
94b343fd | 34 | #include <errno.h> |
10c48e14 | 35 | |
ec4e58a3 | 36 | #include <urcu/arch.h> |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
2953b501 | 38 | #include "cpuset.h" |
94df6318 | 39 | #include "thread-id.h" |
65fcc7e9 | 40 | |
2a7ac59d MD |
41 | /* hardcoded number of CPUs */ |
42 | #define NR_CPUS 16384 | |
43 | ||
10c48e14 MD |
44 | #ifndef DYNAMIC_LINK_TEST |
45 | #define _LGPL_SOURCE | |
10c48e14 | 46 | #endif |
ec4e58a3 | 47 | #include <urcu.h> |
10c48e14 MD |
48 | |
49 | struct test_array { | |
50 | int a; | |
51 | }; | |
52 | ||
ff981126 MJ |
53 | /* |
54 | * static rwlock initializer is broken on Cygwin. Use runtime | |
55 | * initialization. | |
56 | */ | |
57 | pthread_rwlock_t lock; | |
10c48e14 | 58 | |
78efb485 | 59 | static volatile int test_go, test_stop; |
10c48e14 | 60 | |
9e31d0f0 | 61 | static unsigned long wdelay; |
10c48e14 | 62 | |
2b4e4125 | 63 | static volatile struct test_array test_array = { 8 }; |
10c48e14 MD |
64 | |
65 | static unsigned long duration; | |
10c48e14 | 66 | |
daddf5b0 | 67 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
68 | static unsigned long rduration; |
69 | ||
31b598e0 MD |
70 | /* write-side C.S. duration, in loops */ |
71 | static unsigned long wduration; | |
72 | ||
ab0aacbe | 73 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 74 | { |
ab0aacbe | 75 | while (loops-- != 0) |
06f22bdb | 76 | caa_cpu_relax(); |
daddf5b0 MD |
77 | } |
78 | ||
4bad7d45 MD |
79 | static int verbose_mode; |
80 | ||
81 | #define printf_verbose(fmt, args...) \ | |
82 | do { \ | |
83 | if (verbose_mode) \ | |
84 | printf(fmt, args); \ | |
85 | } while (0) | |
86 | ||
2a7ac59d MD |
87 | static unsigned int cpu_affinities[NR_CPUS]; |
88 | static unsigned int next_aff = 0; | |
89 | static int use_affinity = 0; | |
90 | ||
6af882ba MD |
91 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
92 | ||
2a7ac59d MD |
93 | static void set_affinity(void) |
94 | { | |
95bc7fb9 | 95 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 96 | cpu_set_t mask; |
95bc7fb9 MD |
97 | int cpu, ret; |
98 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
99 | |
100 | if (!use_affinity) | |
101 | return; | |
102 | ||
d8540fc5 | 103 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
104 | ret = pthread_mutex_lock(&affinity_mutex); |
105 | if (ret) { | |
106 | perror("Error in pthread mutex lock"); | |
107 | exit(-1); | |
108 | } | |
2a7ac59d | 109 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
110 | ret = pthread_mutex_unlock(&affinity_mutex); |
111 | if (ret) { | |
112 | perror("Error in pthread mutex unlock"); | |
113 | exit(-1); | |
114 | } | |
d8540fc5 | 115 | |
2a7ac59d MD |
116 | CPU_ZERO(&mask); |
117 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
118 | #if SCHED_SETAFFINITY_ARGS == 2 |
119 | sched_setaffinity(0, &mask); | |
120 | #else | |
2a7ac59d | 121 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
122 | #endif |
123 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
124 | } |
125 | ||
10c48e14 MD |
126 | /* |
127 | * returns 0 if test should end. | |
128 | */ | |
129 | static int test_duration_write(void) | |
130 | { | |
78efb485 | 131 | return !test_stop; |
10c48e14 MD |
132 | } |
133 | ||
134 | static int test_duration_read(void) | |
135 | { | |
78efb485 | 136 | return !test_stop; |
10c48e14 MD |
137 | } |
138 | ||
bd252a04 MD |
139 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
140 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
10c48e14 MD |
141 | |
142 | static unsigned int nr_readers; | |
143 | static unsigned int nr_writers; | |
144 | ||
145 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
146 | ||
147 | void rcu_copy_mutex_lock(void) | |
148 | { | |
149 | int ret; | |
150 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
151 | if (ret) { | |
152 | perror("Error in pthread mutex lock"); | |
153 | exit(-1); | |
154 | } | |
155 | } | |
156 | ||
157 | void rcu_copy_mutex_unlock(void) | |
158 | { | |
159 | int ret; | |
160 | ||
161 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
162 | if (ret) { | |
163 | perror("Error in pthread mutex unlock"); | |
164 | exit(-1); | |
165 | } | |
166 | } | |
167 | ||
168 | void *thr_reader(void *_count) | |
169 | { | |
170 | unsigned long long *count = _count; | |
171 | ||
94df6318 MD |
172 | printf_verbose("thread_begin %s, tid %lu\n", |
173 | "reader", urcu_get_thread_id()); | |
10c48e14 | 174 | |
2a7ac59d MD |
175 | set_affinity(); |
176 | ||
10c48e14 MD |
177 | while (!test_go) |
178 | { | |
179 | } | |
180 | ||
181 | for (;;) { | |
ff981126 MJ |
182 | int a, ret; |
183 | ||
184 | ret = pthread_rwlock_rdlock(&lock); | |
185 | if (ret) { | |
186 | fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret)); | |
187 | abort(); | |
188 | } | |
efa8d2c8 | 189 | |
efa8d2c8 MD |
190 | a = test_array.a; |
191 | assert(a == 8); | |
a0b7f7ea | 192 | if (caa_unlikely(rduration)) |
daddf5b0 | 193 | loop_sleep(rduration); |
ff981126 MJ |
194 | |
195 | ret = pthread_rwlock_unlock(&lock); | |
196 | if (ret) { | |
197 | fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret)); | |
198 | abort(); | |
199 | } | |
200 | ||
bd252a04 | 201 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 202 | if (caa_unlikely(!test_duration_read())) |
10c48e14 MD |
203 | break; |
204 | } | |
205 | ||
bd252a04 | 206 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
207 | printf_verbose("thread_end %s, tid %lu\n", |
208 | "reader", urcu_get_thread_id()); | |
10c48e14 MD |
209 | return ((void*)1); |
210 | ||
211 | } | |
212 | ||
213 | void *thr_writer(void *_count) | |
214 | { | |
215 | unsigned long long *count = _count; | |
216 | ||
94df6318 MD |
217 | printf_verbose("thread_begin %s, tid %lu\n", |
218 | "writer", urcu_get_thread_id()); | |
10c48e14 | 219 | |
2a7ac59d MD |
220 | set_affinity(); |
221 | ||
10c48e14 MD |
222 | while (!test_go) |
223 | { | |
224 | } | |
5481ddb3 | 225 | cmm_smp_mb(); |
10c48e14 MD |
226 | |
227 | for (;;) { | |
ff981126 MJ |
228 | int ret; |
229 | ||
230 | ret = pthread_rwlock_wrlock(&lock); | |
231 | if (ret) { | |
232 | fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret)); | |
233 | abort(); | |
234 | } | |
235 | ||
2b4e4125 | 236 | test_array.a = 0; |
10c48e14 | 237 | test_array.a = 8; |
a0b7f7ea | 238 | if (caa_unlikely(wduration)) |
31b598e0 | 239 | loop_sleep(wduration); |
ff981126 MJ |
240 | |
241 | ret = pthread_rwlock_unlock(&lock); | |
242 | if (ret) { | |
243 | fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret)); | |
244 | abort(); | |
245 | } | |
246 | ||
bd252a04 | 247 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 248 | if (caa_unlikely(!test_duration_write())) |
10c48e14 | 249 | break; |
a0b7f7ea | 250 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 251 | loop_sleep(wdelay); |
10c48e14 MD |
252 | } |
253 | ||
94df6318 MD |
254 | printf_verbose("thread_end %s, tid %lu\n", |
255 | "writer", urcu_get_thread_id()); | |
bd252a04 | 256 | *count = URCU_TLS(nr_writes); |
10c48e14 MD |
257 | return ((void*)2); |
258 | } | |
259 | ||
260 | void show_usage(int argc, char **argv) | |
261 | { | |
06637138 MD |
262 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
263 | argv[0]); | |
264 | printf("OPTIONS:\n"); | |
06637138 MD |
265 | printf(" [-d delay] (writer period (us))\n"); |
266 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
267 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
268 | printf(" [-v] (verbose output)\n"); | |
269 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
10c48e14 MD |
270 | printf("\n"); |
271 | } | |
272 | ||
273 | int main(int argc, char **argv) | |
274 | { | |
275 | int err; | |
276 | pthread_t *tid_reader, *tid_writer; | |
277 | void *tret; | |
278 | unsigned long long *count_reader, *count_writer; | |
279 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 280 | int i, a; |
10c48e14 MD |
281 | |
282 | if (argc < 4) { | |
283 | show_usage(argc, argv); | |
284 | return -1; | |
285 | } | |
5481ddb3 | 286 | cmm_smp_mb(); |
10c48e14 MD |
287 | |
288 | err = sscanf(argv[1], "%u", &nr_readers); | |
289 | if (err != 1) { | |
290 | show_usage(argc, argv); | |
291 | return -1; | |
292 | } | |
293 | ||
294 | err = sscanf(argv[2], "%u", &nr_writers); | |
295 | if (err != 1) { | |
296 | show_usage(argc, argv); | |
297 | return -1; | |
298 | } | |
299 | ||
300 | err = sscanf(argv[3], "%lu", &duration); | |
301 | if (err != 1) { | |
302 | show_usage(argc, argv); | |
303 | return -1; | |
304 | } | |
305 | ||
306 | for (i = 4; i < argc; i++) { | |
307 | if (argv[i][0] != '-') | |
308 | continue; | |
309 | switch (argv[i][1]) { | |
9e97e478 MD |
310 | case 'a': |
311 | if (argc < i + 2) { | |
312 | show_usage(argc, argv); | |
313 | return -1; | |
314 | } | |
315 | a = atoi(argv[++i]); | |
2a7ac59d | 316 | cpu_affinities[next_aff++] = a; |
9e97e478 | 317 | use_affinity = 1; |
4bad7d45 | 318 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 319 | break; |
8b632bab MD |
320 | case 'c': |
321 | if (argc < i + 2) { | |
322 | show_usage(argc, argv); | |
323 | return -1; | |
324 | } | |
9e31d0f0 | 325 | rduration = atol(argv[++i]); |
8b632bab | 326 | break; |
10c48e14 MD |
327 | case 'd': |
328 | if (argc < i + 2) { | |
329 | show_usage(argc, argv); | |
330 | return -1; | |
331 | } | |
9e31d0f0 | 332 | wdelay = atol(argv[++i]); |
10c48e14 | 333 | break; |
31b598e0 MD |
334 | case 'e': |
335 | if (argc < i + 2) { | |
336 | show_usage(argc, argv); | |
337 | return -1; | |
338 | } | |
339 | wduration = atol(argv[++i]); | |
340 | break; | |
4bad7d45 MD |
341 | case 'v': |
342 | verbose_mode = 1; | |
343 | break; | |
10c48e14 MD |
344 | } |
345 | } | |
346 | ||
4bad7d45 | 347 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 348 | duration, nr_readers, nr_writers); |
9e31d0f0 | 349 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 350 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
351 | printf_verbose("thread %-6s, tid %lu\n", |
352 | "main", urcu_get_thread_id()); | |
10c48e14 | 353 | |
ff981126 MJ |
354 | err = pthread_rwlock_init(&lock, NULL); |
355 | if (err != 0) { | |
356 | fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err)); | |
357 | exit(1); | |
358 | } | |
359 | ||
9aa14175 MD |
360 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
361 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
362 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
363 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
10c48e14 | 364 | |
2a7ac59d MD |
365 | next_aff = 0; |
366 | ||
10c48e14 MD |
367 | for (i = 0; i < nr_readers; i++) { |
368 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
369 | &count_reader[i]); | |
370 | if (err != 0) | |
371 | exit(1); | |
372 | } | |
373 | for (i = 0; i < nr_writers; i++) { | |
374 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
375 | &count_writer[i]); | |
376 | if (err != 0) | |
377 | exit(1); | |
378 | } | |
379 | ||
5481ddb3 | 380 | cmm_smp_mb(); |
10c48e14 | 381 | |
78efb485 MD |
382 | test_go = 1; |
383 | ||
384 | sleep(duration); | |
385 | ||
386 | test_stop = 1; | |
387 | ||
10c48e14 MD |
388 | for (i = 0; i < nr_readers; i++) { |
389 | err = pthread_join(tid_reader[i], &tret); | |
390 | if (err != 0) | |
391 | exit(1); | |
392 | tot_reads += count_reader[i]; | |
393 | } | |
394 | for (i = 0; i < nr_writers; i++) { | |
395 | err = pthread_join(tid_writer[i], &tret); | |
396 | if (err != 0) | |
397 | exit(1); | |
398 | tot_writes += count_writer[i]; | |
399 | } | |
4bad7d45 MD |
400 | |
401 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 402 | tot_writes); |
a50a7b43 | 403 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 404 | "nr_writers %3u " |
9e31d0f0 | 405 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 406 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
407 | nr_writers, wdelay, tot_reads, tot_writes, |
408 | tot_reads + tot_writes); | |
409 | ||
ff981126 MJ |
410 | err = pthread_rwlock_destroy(&lock); |
411 | if (err != 0) { | |
412 | fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err)); | |
413 | exit(1); | |
414 | } | |
10c48e14 MD |
415 | free(tid_reader); |
416 | free(tid_writer); | |
417 | free(count_reader); | |
418 | free(count_writer); | |
419 | return 0; | |
420 | } |