Commit | Line | Data |
---|---|---|
b257a10b 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> |
b257a10b | 7 | * |
af02d47e MD |
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. | |
b257a10b MD |
21 | */ |
22 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
f5ab766e | 24 | #include "config.h" |
ac260fd9 | 25 | #include <stdio.h> |
f69f195a MD |
26 | #include <pthread.h> |
27 | #include <stdlib.h> | |
41718ff9 | 28 | #include <string.h> |
f69f195a MD |
29 | #include <sys/types.h> |
30 | #include <sys/wait.h> | |
31 | #include <unistd.h> | |
32 | #include <stdio.h> | |
41718ff9 | 33 | #include <assert.h> |
94b343fd | 34 | #include <errno.h> |
87bd15cd | 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" |
2650042a | 40 | #include <../common/debug-yield.h> |
65fcc7e9 | 41 | |
2a7ac59d MD |
42 | /* hardcoded number of CPUs */ |
43 | #define NR_CPUS 16384 | |
44 | ||
121a5d44 MD |
45 | #ifndef DYNAMIC_LINK_TEST |
46 | #define _LGPL_SOURCE | |
121a5d44 | 47 | #endif |
ec4e58a3 | 48 | #include <urcu.h> |
ac260fd9 | 49 | |
78efb485 | 50 | static volatile int test_go, test_stop; |
8c86b9a1 | 51 | |
9e31d0f0 | 52 | static unsigned long wdelay; |
bb488185 | 53 | |
bcc74df3 | 54 | static int *test_rcu_pointer; |
41718ff9 | 55 | |
cf380c2f | 56 | static unsigned long duration; |
cf380c2f | 57 | |
daddf5b0 | 58 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
59 | static unsigned long rduration; |
60 | ||
31b598e0 MD |
61 | /* write-side C.S. duration, in loops */ |
62 | static unsigned long wduration; | |
63 | ||
ab0aacbe | 64 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 65 | { |
ab0aacbe | 66 | while (loops-- != 0) |
06f22bdb | 67 | caa_cpu_relax(); |
daddf5b0 MD |
68 | } |
69 | ||
4bad7d45 MD |
70 | static int verbose_mode; |
71 | ||
72 | #define printf_verbose(fmt, args...) \ | |
73 | do { \ | |
74 | if (verbose_mode) \ | |
75 | printf(fmt, args); \ | |
76 | } while (0) | |
77 | ||
2a7ac59d MD |
78 | static unsigned int cpu_affinities[NR_CPUS]; |
79 | static unsigned int next_aff = 0; | |
80 | static int use_affinity = 0; | |
81 | ||
82 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
83 | ||
84 | static void set_affinity(void) | |
85 | { | |
95bc7fb9 | 86 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 87 | cpu_set_t mask; |
95bc7fb9 MD |
88 | int cpu, ret; |
89 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
90 | |
91 | if (!use_affinity) | |
92 | return; | |
93 | ||
d8540fc5 | 94 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d MD |
95 | ret = pthread_mutex_lock(&affinity_mutex); |
96 | if (ret) { | |
97 | perror("Error in pthread mutex lock"); | |
98 | exit(-1); | |
99 | } | |
100 | cpu = cpu_affinities[next_aff++]; | |
101 | ret = pthread_mutex_unlock(&affinity_mutex); | |
102 | if (ret) { | |
103 | perror("Error in pthread mutex unlock"); | |
104 | exit(-1); | |
105 | } | |
d8540fc5 | 106 | |
2a7ac59d MD |
107 | CPU_ZERO(&mask); |
108 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
109 | #if SCHED_SETAFFINITY_ARGS == 2 |
110 | sched_setaffinity(0, &mask); | |
111 | #else | |
2a7ac59d | 112 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
113 | #endif |
114 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
115 | } |
116 | ||
cf380c2f MD |
117 | /* |
118 | * returns 0 if test should end. | |
119 | */ | |
5873cd17 | 120 | static int test_duration_write(void) |
cf380c2f | 121 | { |
78efb485 | 122 | return !test_stop; |
5873cd17 MD |
123 | } |
124 | ||
125 | static int test_duration_read(void) | |
126 | { | |
78efb485 | 127 | return !test_stop; |
cf380c2f MD |
128 | } |
129 | ||
bd252a04 MD |
130 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
131 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
1eec319e | 132 | |
8c86b9a1 MD |
133 | static unsigned int nr_readers; |
134 | static unsigned int nr_writers; | |
135 | ||
c265818b MD |
136 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; |
137 | ||
138 | void rcu_copy_mutex_lock(void) | |
139 | { | |
140 | int ret; | |
141 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
142 | if (ret) { | |
143 | perror("Error in pthread mutex lock"); | |
144 | exit(-1); | |
145 | } | |
146 | } | |
147 | ||
148 | void rcu_copy_mutex_unlock(void) | |
149 | { | |
150 | int ret; | |
151 | ||
152 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
153 | if (ret) { | |
154 | perror("Error in pthread mutex unlock"); | |
155 | exit(-1); | |
156 | } | |
157 | } | |
f69f195a | 158 | |
1eec319e | 159 | void *thr_reader(void *_count) |
f69f195a | 160 | { |
1eec319e | 161 | unsigned long long *count = _count; |
bcc74df3 | 162 | int *local_ptr; |
41718ff9 | 163 | |
94df6318 MD |
164 | printf_verbose("thread_begin %s, tid %lu\n", |
165 | "reader", urcu_get_thread_id()); | |
f69f195a | 166 | |
2a7ac59d MD |
167 | set_affinity(); |
168 | ||
121a5d44 | 169 | rcu_register_thread(); |
882f3357 | 170 | assert(!rcu_read_ongoing()); |
f69f195a | 171 | |
8c86b9a1 MD |
172 | while (!test_go) |
173 | { | |
174 | } | |
5481ddb3 | 175 | cmm_smp_mb(); |
8c86b9a1 | 176 | |
cf380c2f | 177 | for (;;) { |
1430ee0b | 178 | rcu_read_lock(); |
882f3357 | 179 | assert(rcu_read_ongoing()); |
cf380c2f | 180 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 181 | rcu_debug_yield_read(); |
cf380c2f | 182 | if (local_ptr) |
bcc74df3 | 183 | assert(*local_ptr == 8); |
a0b7f7ea | 184 | if (caa_unlikely(rduration)) |
daddf5b0 | 185 | loop_sleep(rduration); |
1430ee0b | 186 | rcu_read_unlock(); |
bd252a04 | 187 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 188 | if (caa_unlikely(!test_duration_read())) |
cf380c2f | 189 | break; |
41718ff9 | 190 | } |
f69f195a | 191 | |
121a5d44 | 192 | rcu_unregister_thread(); |
41718ff9 | 193 | |
2b514ae2 MD |
194 | /* test extra thread registration */ |
195 | rcu_register_thread(); | |
196 | rcu_unregister_thread(); | |
197 | ||
bd252a04 | 198 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
199 | printf_verbose("thread_end %s, tid %lu\n", |
200 | "reader", urcu_get_thread_id()); | |
f69f195a MD |
201 | return ((void*)1); |
202 | ||
203 | } | |
204 | ||
1eec319e | 205 | void *thr_writer(void *_count) |
f69f195a | 206 | { |
1eec319e | 207 | unsigned long long *count = _count; |
bcc74df3 | 208 | int *new, *old; |
f69f195a | 209 | |
94df6318 MD |
210 | printf_verbose("thread_begin %s, tid %lu\n", |
211 | "writer", urcu_get_thread_id()); | |
f69f195a | 212 | |
2a7ac59d MD |
213 | set_affinity(); |
214 | ||
8c86b9a1 MD |
215 | while (!test_go) |
216 | { | |
217 | } | |
5481ddb3 | 218 | cmm_smp_mb(); |
8c86b9a1 | 219 | |
cf380c2f | 220 | for (;;) { |
bcc74df3 MD |
221 | new = malloc(sizeof(int)); |
222 | assert(new); | |
223 | *new = 8; | |
d2835e6f | 224 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 225 | if (caa_unlikely(wduration)) |
31b598e0 | 226 | loop_sleep(wduration); |
d2835e6f | 227 | synchronize_rcu(); |
cf380c2f | 228 | if (old) |
bcc74df3 MD |
229 | *old = 0; |
230 | free(old); | |
bd252a04 | 231 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 232 | if (caa_unlikely(!test_duration_write())) |
cf380c2f | 233 | break; |
a0b7f7ea | 234 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 235 | loop_sleep(wdelay); |
f69f195a MD |
236 | } |
237 | ||
94df6318 MD |
238 | printf_verbose("thread_end %s, tid %lu\n", |
239 | "writer", urcu_get_thread_id()); | |
bd252a04 | 240 | *count = URCU_TLS(nr_writes); |
f69f195a MD |
241 | return ((void*)2); |
242 | } | |
ac260fd9 | 243 | |
1430ee0b MD |
244 | void show_usage(int argc, char **argv) |
245 | { | |
06637138 MD |
246 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
247 | argv[0]); | |
248 | printf("OPTIONS:\n"); | |
06637138 | 249 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
250 | printf(" [-d delay] (writer period (us))\n"); |
251 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
252 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
253 | printf(" [-v] (verbose output)\n"); | |
254 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
1430ee0b MD |
255 | printf("\n"); |
256 | } | |
257 | ||
cf380c2f | 258 | int main(int argc, char **argv) |
ac260fd9 | 259 | { |
f69f195a | 260 | int err; |
8c86b9a1 | 261 | pthread_t *tid_reader, *tid_writer; |
f69f195a | 262 | void *tret; |
8c86b9a1 | 263 | unsigned long long *count_reader, *count_writer; |
1eec319e | 264 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 265 | int i, a; |
f69f195a | 266 | |
8c86b9a1 MD |
267 | if (argc < 4) { |
268 | show_usage(argc, argv); | |
269 | return -1; | |
270 | } | |
271 | ||
272 | err = sscanf(argv[1], "%u", &nr_readers); | |
273 | if (err != 1) { | |
1430ee0b | 274 | show_usage(argc, argv); |
cf380c2f MD |
275 | return -1; |
276 | } | |
277 | ||
8c86b9a1 MD |
278 | err = sscanf(argv[2], "%u", &nr_writers); |
279 | if (err != 1) { | |
280 | show_usage(argc, argv); | |
281 | return -1; | |
282 | } | |
283 | ||
284 | err = sscanf(argv[3], "%lu", &duration); | |
cf380c2f | 285 | if (err != 1) { |
1430ee0b | 286 | show_usage(argc, argv); |
cf380c2f MD |
287 | return -1; |
288 | } | |
289 | ||
8c86b9a1 | 290 | for (i = 4; i < argc; i++) { |
cf380c2f MD |
291 | if (argv[i][0] != '-') |
292 | continue; | |
293 | switch (argv[i][1]) { | |
294 | case 'r': | |
2650042a | 295 | rcu_debug_yield_enable(RCU_YIELD_READ); |
cf380c2f MD |
296 | break; |
297 | case 'w': | |
2650042a | 298 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
cf380c2f | 299 | break; |
9e97e478 MD |
300 | case 'a': |
301 | if (argc < i + 2) { | |
302 | show_usage(argc, argv); | |
303 | return -1; | |
304 | } | |
305 | a = atoi(argv[++i]); | |
2a7ac59d | 306 | cpu_affinities[next_aff++] = a; |
9e97e478 | 307 | use_affinity = 1; |
4bad7d45 | 308 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 309 | break; |
8b632bab MD |
310 | case 'c': |
311 | if (argc < i + 2) { | |
312 | show_usage(argc, argv); | |
313 | return -1; | |
314 | } | |
9e31d0f0 | 315 | rduration = atol(argv[++i]); |
8b632bab | 316 | break; |
8c86b9a1 | 317 | case 'd': |
7685d963 | 318 | if (argc < i + 2) { |
8c86b9a1 MD |
319 | show_usage(argc, argv); |
320 | return -1; | |
321 | } | |
9e31d0f0 | 322 | wdelay = atol(argv[++i]); |
bb488185 | 323 | break; |
31b598e0 MD |
324 | case 'e': |
325 | if (argc < i + 2) { | |
326 | show_usage(argc, argv); | |
327 | return -1; | |
328 | } | |
329 | wduration = atol(argv[++i]); | |
330 | break; | |
4bad7d45 MD |
331 | case 'v': |
332 | verbose_mode = 1; | |
333 | break; | |
cf380c2f MD |
334 | } |
335 | } | |
cf380c2f | 336 | |
4bad7d45 | 337 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
8c86b9a1 | 338 | duration, nr_readers, nr_writers); |
9e31d0f0 | 339 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 340 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
341 | printf_verbose("thread %-6s, tid %lu\n", |
342 | "main", urcu_get_thread_id()); | |
87bd15cd | 343 | |
9aa14175 MD |
344 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
345 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
346 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
347 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
8c86b9a1 | 348 | |
2a7ac59d MD |
349 | next_aff = 0; |
350 | ||
8c86b9a1 | 351 | for (i = 0; i < nr_readers; i++) { |
1eec319e MD |
352 | err = pthread_create(&tid_reader[i], NULL, thr_reader, |
353 | &count_reader[i]); | |
f69f195a MD |
354 | if (err != 0) |
355 | exit(1); | |
356 | } | |
8c86b9a1 | 357 | for (i = 0; i < nr_writers; i++) { |
1eec319e MD |
358 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
359 | &count_writer[i]); | |
f69f195a MD |
360 | if (err != 0) |
361 | exit(1); | |
362 | } | |
363 | ||
5481ddb3 | 364 | cmm_smp_mb(); |
8c86b9a1 | 365 | |
78efb485 MD |
366 | test_go = 1; |
367 | ||
368 | sleep(duration); | |
369 | ||
370 | test_stop = 1; | |
371 | ||
8c86b9a1 | 372 | for (i = 0; i < nr_readers; i++) { |
f69f195a MD |
373 | err = pthread_join(tid_reader[i], &tret); |
374 | if (err != 0) | |
375 | exit(1); | |
1eec319e | 376 | tot_reads += count_reader[i]; |
f69f195a | 377 | } |
8c86b9a1 | 378 | for (i = 0; i < nr_writers; i++) { |
f69f195a MD |
379 | err = pthread_join(tid_writer[i], &tret); |
380 | if (err != 0) | |
381 | exit(1); | |
1eec319e | 382 | tot_writes += count_writer[i]; |
f69f195a | 383 | } |
5873cd17 | 384 | |
4bad7d45 | 385 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
1eec319e | 386 | tot_writes); |
a50a7b43 | 387 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 388 | "nr_writers %3u " |
9e31d0f0 | 389 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 390 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
391 | nr_writers, wdelay, tot_reads, tot_writes, |
392 | tot_reads + tot_writes); | |
bcc74df3 | 393 | free(test_rcu_pointer); |
8c86b9a1 MD |
394 | free(tid_reader); |
395 | free(tid_writer); | |
396 | free(count_reader); | |
397 | free(count_writer); | |
f69f195a | 398 | return 0; |
ac260fd9 | 399 | } |