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 |
d8540fc5 | 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" |
7685d963 | 39 | |
65fcc7e9 MD |
40 | #ifdef __linux__ |
41 | #include <syscall.h> | |
42 | #endif | |
43 | ||
2a7ac59d MD |
44 | /* hardcoded number of CPUs */ |
45 | #define NR_CPUS 16384 | |
46 | ||
87bd15cd BW |
47 | #if defined(_syscall0) |
48 | _syscall0(pid_t, gettid) | |
49 | #elif defined(__NR_gettid) | |
50 | static inline pid_t gettid(void) | |
51 | { | |
52 | return syscall(__NR_gettid); | |
53 | } | |
54 | #else | |
55 | #warning "use pid as tid" | |
56 | static inline pid_t gettid(void) | |
57 | { | |
58 | return getpid(); | |
59 | } | |
60 | #endif | |
61 | ||
121a5d44 MD |
62 | #ifndef DYNAMIC_LINK_TEST |
63 | #define _LGPL_SOURCE | |
64 | #else | |
1de4df4b | 65 | #define rcu_debug_yield_read() |
121a5d44 | 66 | #endif |
ec4e58a3 | 67 | #include <urcu.h> |
ac260fd9 | 68 | |
78efb485 | 69 | static volatile int test_go, test_stop; |
8c86b9a1 | 70 | |
9e31d0f0 | 71 | static unsigned long wdelay; |
bb488185 | 72 | |
bcc74df3 | 73 | static int *test_rcu_pointer; |
41718ff9 | 74 | |
cf380c2f | 75 | static unsigned long duration; |
cf380c2f | 76 | |
daddf5b0 | 77 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
78 | static unsigned long rduration; |
79 | ||
31b598e0 MD |
80 | /* write-side C.S. duration, in loops */ |
81 | static unsigned long wduration; | |
82 | ||
ab0aacbe | 83 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 84 | { |
ab0aacbe | 85 | while (loops-- != 0) |
06f22bdb | 86 | caa_cpu_relax(); |
daddf5b0 MD |
87 | } |
88 | ||
4bad7d45 MD |
89 | static int verbose_mode; |
90 | ||
91 | #define printf_verbose(fmt, args...) \ | |
92 | do { \ | |
93 | if (verbose_mode) \ | |
94 | printf(fmt, args); \ | |
95 | } while (0) | |
96 | ||
2a7ac59d MD |
97 | static unsigned int cpu_affinities[NR_CPUS]; |
98 | static unsigned int next_aff = 0; | |
99 | static int use_affinity = 0; | |
100 | ||
101 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
102 | ||
103 | static void set_affinity(void) | |
104 | { | |
95bc7fb9 | 105 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 106 | cpu_set_t mask; |
95bc7fb9 MD |
107 | int cpu, ret; |
108 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
109 | |
110 | if (!use_affinity) | |
111 | return; | |
112 | ||
d8540fc5 | 113 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d MD |
114 | ret = pthread_mutex_lock(&affinity_mutex); |
115 | if (ret) { | |
116 | perror("Error in pthread mutex lock"); | |
117 | exit(-1); | |
118 | } | |
119 | cpu = cpu_affinities[next_aff++]; | |
120 | ret = pthread_mutex_unlock(&affinity_mutex); | |
121 | if (ret) { | |
122 | perror("Error in pthread mutex unlock"); | |
123 | exit(-1); | |
124 | } | |
d8540fc5 | 125 | |
2a7ac59d MD |
126 | CPU_ZERO(&mask); |
127 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
128 | #if SCHED_SETAFFINITY_ARGS == 2 |
129 | sched_setaffinity(0, &mask); | |
130 | #else | |
2a7ac59d | 131 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
132 | #endif |
133 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
134 | } |
135 | ||
cf380c2f MD |
136 | /* |
137 | * returns 0 if test should end. | |
138 | */ | |
5873cd17 | 139 | static int test_duration_write(void) |
cf380c2f | 140 | { |
78efb485 | 141 | return !test_stop; |
5873cd17 MD |
142 | } |
143 | ||
144 | static int test_duration_read(void) | |
145 | { | |
78efb485 | 146 | return !test_stop; |
cf380c2f MD |
147 | } |
148 | ||
bd252a04 MD |
149 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
150 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
1eec319e | 151 | |
8c86b9a1 MD |
152 | static unsigned int nr_readers; |
153 | static unsigned int nr_writers; | |
154 | ||
c265818b MD |
155 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; |
156 | ||
157 | void rcu_copy_mutex_lock(void) | |
158 | { | |
159 | int ret; | |
160 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
161 | if (ret) { | |
162 | perror("Error in pthread mutex lock"); | |
163 | exit(-1); | |
164 | } | |
165 | } | |
166 | ||
167 | void rcu_copy_mutex_unlock(void) | |
168 | { | |
169 | int ret; | |
170 | ||
171 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
172 | if (ret) { | |
173 | perror("Error in pthread mutex unlock"); | |
174 | exit(-1); | |
175 | } | |
176 | } | |
f69f195a | 177 | |
1eec319e | 178 | void *thr_reader(void *_count) |
f69f195a | 179 | { |
1eec319e | 180 | unsigned long long *count = _count; |
bcc74df3 | 181 | int *local_ptr; |
41718ff9 | 182 | |
4bad7d45 | 183 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
184 | "reader", (unsigned long) pthread_self(), |
185 | (unsigned long) gettid()); | |
f69f195a | 186 | |
2a7ac59d MD |
187 | set_affinity(); |
188 | ||
121a5d44 | 189 | rcu_register_thread(); |
882f3357 | 190 | assert(!rcu_read_ongoing()); |
f69f195a | 191 | |
8c86b9a1 MD |
192 | while (!test_go) |
193 | { | |
194 | } | |
5481ddb3 | 195 | cmm_smp_mb(); |
8c86b9a1 | 196 | |
cf380c2f | 197 | for (;;) { |
1430ee0b | 198 | rcu_read_lock(); |
882f3357 | 199 | assert(rcu_read_ongoing()); |
cf380c2f | 200 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 201 | rcu_debug_yield_read(); |
cf380c2f | 202 | if (local_ptr) |
bcc74df3 | 203 | assert(*local_ptr == 8); |
a0b7f7ea | 204 | if (caa_unlikely(rduration)) |
daddf5b0 | 205 | loop_sleep(rduration); |
1430ee0b | 206 | rcu_read_unlock(); |
bd252a04 | 207 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 208 | if (caa_unlikely(!test_duration_read())) |
cf380c2f | 209 | break; |
41718ff9 | 210 | } |
f69f195a | 211 | |
121a5d44 | 212 | rcu_unregister_thread(); |
41718ff9 | 213 | |
2b514ae2 MD |
214 | /* test extra thread registration */ |
215 | rcu_register_thread(); | |
216 | rcu_unregister_thread(); | |
217 | ||
bd252a04 | 218 | *count = URCU_TLS(nr_reads); |
4bad7d45 | 219 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
220 | "reader", (unsigned long) pthread_self(), |
221 | (unsigned long) gettid()); | |
f69f195a MD |
222 | return ((void*)1); |
223 | ||
224 | } | |
225 | ||
1eec319e | 226 | void *thr_writer(void *_count) |
f69f195a | 227 | { |
1eec319e | 228 | unsigned long long *count = _count; |
bcc74df3 | 229 | int *new, *old; |
f69f195a | 230 | |
4bad7d45 | 231 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
232 | "writer", (unsigned long) pthread_self(), |
233 | (unsigned long) gettid()); | |
f69f195a | 234 | |
2a7ac59d MD |
235 | set_affinity(); |
236 | ||
8c86b9a1 MD |
237 | while (!test_go) |
238 | { | |
239 | } | |
5481ddb3 | 240 | cmm_smp_mb(); |
8c86b9a1 | 241 | |
cf380c2f | 242 | for (;;) { |
bcc74df3 MD |
243 | new = malloc(sizeof(int)); |
244 | assert(new); | |
245 | *new = 8; | |
d2835e6f | 246 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 247 | if (caa_unlikely(wduration)) |
31b598e0 | 248 | loop_sleep(wduration); |
d2835e6f | 249 | synchronize_rcu(); |
cf380c2f | 250 | if (old) |
bcc74df3 MD |
251 | *old = 0; |
252 | free(old); | |
bd252a04 | 253 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 254 | if (caa_unlikely(!test_duration_write())) |
cf380c2f | 255 | break; |
a0b7f7ea | 256 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 257 | loop_sleep(wdelay); |
f69f195a MD |
258 | } |
259 | ||
4bad7d45 | 260 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
261 | "writer", (unsigned long) pthread_self(), |
262 | (unsigned long) gettid()); | |
bd252a04 | 263 | *count = URCU_TLS(nr_writes); |
f69f195a MD |
264 | return ((void*)2); |
265 | } | |
ac260fd9 | 266 | |
1430ee0b MD |
267 | void show_usage(int argc, char **argv) |
268 | { | |
06637138 MD |
269 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
270 | argv[0]); | |
271 | printf("OPTIONS:\n"); | |
1430ee0b | 272 | #ifdef DEBUG_YIELD |
06637138 | 273 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
1430ee0b | 274 | #endif |
06637138 MD |
275 | printf(" [-d delay] (writer period (us))\n"); |
276 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
277 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
278 | printf(" [-v] (verbose output)\n"); | |
279 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
1430ee0b MD |
280 | printf("\n"); |
281 | } | |
282 | ||
cf380c2f | 283 | int main(int argc, char **argv) |
ac260fd9 | 284 | { |
f69f195a | 285 | int err; |
8c86b9a1 | 286 | pthread_t *tid_reader, *tid_writer; |
f69f195a | 287 | void *tret; |
8c86b9a1 | 288 | unsigned long long *count_reader, *count_writer; |
1eec319e | 289 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 290 | int i, a; |
f69f195a | 291 | |
8c86b9a1 MD |
292 | if (argc < 4) { |
293 | show_usage(argc, argv); | |
294 | return -1; | |
295 | } | |
296 | ||
297 | err = sscanf(argv[1], "%u", &nr_readers); | |
298 | if (err != 1) { | |
1430ee0b | 299 | show_usage(argc, argv); |
cf380c2f MD |
300 | return -1; |
301 | } | |
302 | ||
8c86b9a1 MD |
303 | err = sscanf(argv[2], "%u", &nr_writers); |
304 | if (err != 1) { | |
305 | show_usage(argc, argv); | |
306 | return -1; | |
307 | } | |
308 | ||
309 | err = sscanf(argv[3], "%lu", &duration); | |
cf380c2f | 310 | if (err != 1) { |
1430ee0b | 311 | show_usage(argc, argv); |
cf380c2f MD |
312 | return -1; |
313 | } | |
314 | ||
8c86b9a1 | 315 | for (i = 4; i < argc; i++) { |
cf380c2f MD |
316 | if (argv[i][0] != '-') |
317 | continue; | |
318 | switch (argv[i][1]) { | |
bb488185 | 319 | #ifdef DEBUG_YIELD |
cf380c2f | 320 | case 'r': |
1de4df4b | 321 | rcu_yield_active |= RCU_YIELD_READ; |
cf380c2f MD |
322 | break; |
323 | case 'w': | |
1de4df4b | 324 | rcu_yield_active |= RCU_YIELD_WRITE; |
cf380c2f | 325 | break; |
bb488185 | 326 | #endif |
9e97e478 MD |
327 | case 'a': |
328 | if (argc < i + 2) { | |
329 | show_usage(argc, argv); | |
330 | return -1; | |
331 | } | |
332 | a = atoi(argv[++i]); | |
2a7ac59d | 333 | cpu_affinities[next_aff++] = a; |
9e97e478 | 334 | use_affinity = 1; |
4bad7d45 | 335 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 336 | break; |
8b632bab MD |
337 | case 'c': |
338 | if (argc < i + 2) { | |
339 | show_usage(argc, argv); | |
340 | return -1; | |
341 | } | |
9e31d0f0 | 342 | rduration = atol(argv[++i]); |
8b632bab | 343 | break; |
8c86b9a1 | 344 | case 'd': |
7685d963 | 345 | if (argc < i + 2) { |
8c86b9a1 MD |
346 | show_usage(argc, argv); |
347 | return -1; | |
348 | } | |
9e31d0f0 | 349 | wdelay = atol(argv[++i]); |
bb488185 | 350 | break; |
31b598e0 MD |
351 | case 'e': |
352 | if (argc < i + 2) { | |
353 | show_usage(argc, argv); | |
354 | return -1; | |
355 | } | |
356 | wduration = atol(argv[++i]); | |
357 | break; | |
4bad7d45 MD |
358 | case 'v': |
359 | verbose_mode = 1; | |
360 | break; | |
cf380c2f MD |
361 | } |
362 | } | |
cf380c2f | 363 | |
4bad7d45 | 364 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
8c86b9a1 | 365 | duration, nr_readers, nr_writers); |
9e31d0f0 | 366 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
367 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
368 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
369 | "main", (unsigned long) pthread_self(), |
370 | (unsigned long)gettid()); | |
87bd15cd | 371 | |
8c86b9a1 MD |
372 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
373 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
374 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
375 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
376 | ||
2a7ac59d MD |
377 | next_aff = 0; |
378 | ||
8c86b9a1 | 379 | for (i = 0; i < nr_readers; i++) { |
1eec319e MD |
380 | err = pthread_create(&tid_reader[i], NULL, thr_reader, |
381 | &count_reader[i]); | |
f69f195a MD |
382 | if (err != 0) |
383 | exit(1); | |
384 | } | |
8c86b9a1 | 385 | for (i = 0; i < nr_writers; i++) { |
1eec319e MD |
386 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
387 | &count_writer[i]); | |
f69f195a MD |
388 | if (err != 0) |
389 | exit(1); | |
390 | } | |
391 | ||
5481ddb3 | 392 | cmm_smp_mb(); |
8c86b9a1 | 393 | |
78efb485 MD |
394 | test_go = 1; |
395 | ||
396 | sleep(duration); | |
397 | ||
398 | test_stop = 1; | |
399 | ||
8c86b9a1 | 400 | for (i = 0; i < nr_readers; i++) { |
f69f195a MD |
401 | err = pthread_join(tid_reader[i], &tret); |
402 | if (err != 0) | |
403 | exit(1); | |
1eec319e | 404 | tot_reads += count_reader[i]; |
f69f195a | 405 | } |
8c86b9a1 | 406 | for (i = 0; i < nr_writers; i++) { |
f69f195a MD |
407 | err = pthread_join(tid_writer[i], &tret); |
408 | if (err != 0) | |
409 | exit(1); | |
1eec319e | 410 | tot_writes += count_writer[i]; |
f69f195a | 411 | } |
5873cd17 | 412 | |
4bad7d45 | 413 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
1eec319e | 414 | tot_writes); |
a50a7b43 | 415 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 416 | "nr_writers %3u " |
9e31d0f0 | 417 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 418 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
419 | nr_writers, wdelay, tot_reads, tot_writes, |
420 | tot_reads + tot_writes); | |
bcc74df3 | 421 | free(test_rcu_pointer); |
8c86b9a1 MD |
422 | free(tid_reader); |
423 | free(tid_writer); | |
424 | free(count_reader); | |
425 | free(count_writer); | |
f69f195a | 426 | return 0; |
ac260fd9 | 427 | } |