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 | ||
ac260fd9 | 23 | #include <stdio.h> |
f69f195a MD |
24 | #include <pthread.h> |
25 | #include <stdlib.h> | |
41718ff9 | 26 | #include <string.h> |
f69f195a MD |
27 | #include <sys/types.h> |
28 | #include <sys/wait.h> | |
29 | #include <unistd.h> | |
30 | #include <stdio.h> | |
41718ff9 | 31 | #include <assert.h> |
94b343fd | 32 | #include <errno.h> |
87bd15cd | 33 | |
ec4e58a3 | 34 | #include <urcu/arch.h> |
bd252a04 | 35 | #include <urcu/tls-compat.h> |
94df6318 | 36 | #include "thread-id.h" |
2650042a | 37 | #include <../common/debug-yield.h> |
65fcc7e9 | 38 | |
2a7ac59d MD |
39 | /* hardcoded number of CPUs */ |
40 | #define NR_CPUS 16384 | |
41 | ||
121a5d44 MD |
42 | #ifndef DYNAMIC_LINK_TEST |
43 | #define _LGPL_SOURCE | |
121a5d44 | 44 | #endif |
ec4e58a3 | 45 | #include <urcu.h> |
ac260fd9 | 46 | |
78efb485 | 47 | static volatile int test_go, test_stop; |
8c86b9a1 | 48 | |
9e31d0f0 | 49 | static unsigned long wdelay; |
bb488185 | 50 | |
bcc74df3 | 51 | static int *test_rcu_pointer; |
41718ff9 | 52 | |
cf380c2f | 53 | static unsigned long duration; |
cf380c2f | 54 | |
daddf5b0 | 55 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
56 | static unsigned long rduration; |
57 | ||
31b598e0 MD |
58 | /* write-side C.S. duration, in loops */ |
59 | static unsigned long wduration; | |
60 | ||
ab0aacbe | 61 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 62 | { |
ab0aacbe | 63 | while (loops-- != 0) |
06f22bdb | 64 | caa_cpu_relax(); |
daddf5b0 MD |
65 | } |
66 | ||
4bad7d45 MD |
67 | static int verbose_mode; |
68 | ||
69 | #define printf_verbose(fmt, args...) \ | |
70 | do { \ | |
71 | if (verbose_mode) \ | |
72 | printf(fmt, args); \ | |
73 | } while (0) | |
74 | ||
2a7ac59d MD |
75 | static unsigned int cpu_affinities[NR_CPUS]; |
76 | static unsigned int next_aff = 0; | |
77 | static int use_affinity = 0; | |
78 | ||
79 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
80 | ||
81 | static void set_affinity(void) | |
82 | { | |
95bc7fb9 | 83 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 84 | cpu_set_t mask; |
95bc7fb9 MD |
85 | int cpu, ret; |
86 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
87 | |
88 | if (!use_affinity) | |
89 | return; | |
90 | ||
d8540fc5 | 91 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d MD |
92 | ret = pthread_mutex_lock(&affinity_mutex); |
93 | if (ret) { | |
94 | perror("Error in pthread mutex lock"); | |
95 | exit(-1); | |
96 | } | |
97 | cpu = cpu_affinities[next_aff++]; | |
98 | ret = pthread_mutex_unlock(&affinity_mutex); | |
99 | if (ret) { | |
100 | perror("Error in pthread mutex unlock"); | |
101 | exit(-1); | |
102 | } | |
d8540fc5 | 103 | |
2a7ac59d MD |
104 | CPU_ZERO(&mask); |
105 | CPU_SET(cpu, &mask); | |
106 | sched_setaffinity(0, sizeof(mask), &mask); | |
d8540fc5 | 107 | #endif /* HAVE_SCHED_SETAFFINITY */ |
2a7ac59d MD |
108 | } |
109 | ||
cf380c2f MD |
110 | /* |
111 | * returns 0 if test should end. | |
112 | */ | |
5873cd17 | 113 | static int test_duration_write(void) |
cf380c2f | 114 | { |
78efb485 | 115 | return !test_stop; |
5873cd17 MD |
116 | } |
117 | ||
118 | static int test_duration_read(void) | |
119 | { | |
78efb485 | 120 | return !test_stop; |
cf380c2f MD |
121 | } |
122 | ||
bd252a04 MD |
123 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
124 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
1eec319e | 125 | |
8c86b9a1 MD |
126 | static unsigned int nr_readers; |
127 | static unsigned int nr_writers; | |
128 | ||
c265818b MD |
129 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; |
130 | ||
131 | void rcu_copy_mutex_lock(void) | |
132 | { | |
133 | int ret; | |
134 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
135 | if (ret) { | |
136 | perror("Error in pthread mutex lock"); | |
137 | exit(-1); | |
138 | } | |
139 | } | |
140 | ||
141 | void rcu_copy_mutex_unlock(void) | |
142 | { | |
143 | int ret; | |
144 | ||
145 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
146 | if (ret) { | |
147 | perror("Error in pthread mutex unlock"); | |
148 | exit(-1); | |
149 | } | |
150 | } | |
f69f195a | 151 | |
1eec319e | 152 | void *thr_reader(void *_count) |
f69f195a | 153 | { |
1eec319e | 154 | unsigned long long *count = _count; |
bcc74df3 | 155 | int *local_ptr; |
41718ff9 | 156 | |
94df6318 MD |
157 | printf_verbose("thread_begin %s, tid %lu\n", |
158 | "reader", urcu_get_thread_id()); | |
f69f195a | 159 | |
2a7ac59d MD |
160 | set_affinity(); |
161 | ||
121a5d44 | 162 | rcu_register_thread(); |
882f3357 | 163 | assert(!rcu_read_ongoing()); |
f69f195a | 164 | |
8c86b9a1 MD |
165 | while (!test_go) |
166 | { | |
167 | } | |
5481ddb3 | 168 | cmm_smp_mb(); |
8c86b9a1 | 169 | |
cf380c2f | 170 | for (;;) { |
1430ee0b | 171 | rcu_read_lock(); |
882f3357 | 172 | assert(rcu_read_ongoing()); |
cf380c2f | 173 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 174 | rcu_debug_yield_read(); |
cf380c2f | 175 | if (local_ptr) |
bcc74df3 | 176 | assert(*local_ptr == 8); |
a0b7f7ea | 177 | if (caa_unlikely(rduration)) |
daddf5b0 | 178 | loop_sleep(rduration); |
1430ee0b | 179 | rcu_read_unlock(); |
bd252a04 | 180 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 181 | if (caa_unlikely(!test_duration_read())) |
cf380c2f | 182 | break; |
41718ff9 | 183 | } |
f69f195a | 184 | |
121a5d44 | 185 | rcu_unregister_thread(); |
41718ff9 | 186 | |
2b514ae2 MD |
187 | /* test extra thread registration */ |
188 | rcu_register_thread(); | |
189 | rcu_unregister_thread(); | |
190 | ||
bd252a04 | 191 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
192 | printf_verbose("thread_end %s, tid %lu\n", |
193 | "reader", urcu_get_thread_id()); | |
f69f195a MD |
194 | return ((void*)1); |
195 | ||
196 | } | |
197 | ||
1eec319e | 198 | void *thr_writer(void *_count) |
f69f195a | 199 | { |
1eec319e | 200 | unsigned long long *count = _count; |
bcc74df3 | 201 | int *new, *old; |
f69f195a | 202 | |
94df6318 MD |
203 | printf_verbose("thread_begin %s, tid %lu\n", |
204 | "writer", urcu_get_thread_id()); | |
f69f195a | 205 | |
2a7ac59d MD |
206 | set_affinity(); |
207 | ||
8c86b9a1 MD |
208 | while (!test_go) |
209 | { | |
210 | } | |
5481ddb3 | 211 | cmm_smp_mb(); |
8c86b9a1 | 212 | |
cf380c2f | 213 | for (;;) { |
bcc74df3 MD |
214 | new = malloc(sizeof(int)); |
215 | assert(new); | |
216 | *new = 8; | |
d2835e6f | 217 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 218 | if (caa_unlikely(wduration)) |
31b598e0 | 219 | loop_sleep(wduration); |
d2835e6f | 220 | synchronize_rcu(); |
cf380c2f | 221 | if (old) |
bcc74df3 MD |
222 | *old = 0; |
223 | free(old); | |
bd252a04 | 224 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 225 | if (caa_unlikely(!test_duration_write())) |
cf380c2f | 226 | break; |
a0b7f7ea | 227 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 228 | loop_sleep(wdelay); |
f69f195a MD |
229 | } |
230 | ||
94df6318 MD |
231 | printf_verbose("thread_end %s, tid %lu\n", |
232 | "writer", urcu_get_thread_id()); | |
bd252a04 | 233 | *count = URCU_TLS(nr_writes); |
f69f195a MD |
234 | return ((void*)2); |
235 | } | |
ac260fd9 | 236 | |
1430ee0b MD |
237 | void show_usage(int argc, char **argv) |
238 | { | |
06637138 MD |
239 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
240 | argv[0]); | |
241 | printf("OPTIONS:\n"); | |
06637138 | 242 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
243 | printf(" [-d delay] (writer period (us))\n"); |
244 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
245 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
246 | printf(" [-v] (verbose output)\n"); | |
247 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
1430ee0b MD |
248 | printf("\n"); |
249 | } | |
250 | ||
cf380c2f | 251 | int main(int argc, char **argv) |
ac260fd9 | 252 | { |
f69f195a | 253 | int err; |
8c86b9a1 | 254 | pthread_t *tid_reader, *tid_writer; |
f69f195a | 255 | void *tret; |
8c86b9a1 | 256 | unsigned long long *count_reader, *count_writer; |
1eec319e | 257 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 258 | int i, a; |
83e334d0 | 259 | unsigned int i_thr; |
f69f195a | 260 | |
8c86b9a1 MD |
261 | if (argc < 4) { |
262 | show_usage(argc, argv); | |
263 | return -1; | |
264 | } | |
265 | ||
266 | err = sscanf(argv[1], "%u", &nr_readers); | |
267 | if (err != 1) { | |
1430ee0b | 268 | show_usage(argc, argv); |
cf380c2f MD |
269 | return -1; |
270 | } | |
271 | ||
8c86b9a1 MD |
272 | err = sscanf(argv[2], "%u", &nr_writers); |
273 | if (err != 1) { | |
274 | show_usage(argc, argv); | |
275 | return -1; | |
276 | } | |
83e334d0 | 277 | |
8c86b9a1 | 278 | err = sscanf(argv[3], "%lu", &duration); |
cf380c2f | 279 | if (err != 1) { |
1430ee0b | 280 | show_usage(argc, argv); |
cf380c2f MD |
281 | return -1; |
282 | } | |
283 | ||
8c86b9a1 | 284 | for (i = 4; i < argc; i++) { |
cf380c2f MD |
285 | if (argv[i][0] != '-') |
286 | continue; | |
287 | switch (argv[i][1]) { | |
288 | case 'r': | |
2650042a | 289 | rcu_debug_yield_enable(RCU_YIELD_READ); |
cf380c2f MD |
290 | break; |
291 | case 'w': | |
2650042a | 292 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
cf380c2f | 293 | break; |
9e97e478 MD |
294 | case 'a': |
295 | if (argc < i + 2) { | |
296 | show_usage(argc, argv); | |
297 | return -1; | |
298 | } | |
299 | a = atoi(argv[++i]); | |
2a7ac59d | 300 | cpu_affinities[next_aff++] = a; |
9e97e478 | 301 | use_affinity = 1; |
4bad7d45 | 302 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 303 | break; |
8b632bab MD |
304 | case 'c': |
305 | if (argc < i + 2) { | |
306 | show_usage(argc, argv); | |
307 | return -1; | |
308 | } | |
9e31d0f0 | 309 | rduration = atol(argv[++i]); |
8b632bab | 310 | break; |
8c86b9a1 | 311 | case 'd': |
7685d963 | 312 | if (argc < i + 2) { |
8c86b9a1 MD |
313 | show_usage(argc, argv); |
314 | return -1; | |
315 | } | |
9e31d0f0 | 316 | wdelay = atol(argv[++i]); |
bb488185 | 317 | break; |
31b598e0 MD |
318 | case 'e': |
319 | if (argc < i + 2) { | |
320 | show_usage(argc, argv); | |
321 | return -1; | |
322 | } | |
323 | wduration = atol(argv[++i]); | |
324 | break; | |
4bad7d45 MD |
325 | case 'v': |
326 | verbose_mode = 1; | |
327 | break; | |
cf380c2f MD |
328 | } |
329 | } | |
cf380c2f | 330 | |
4bad7d45 | 331 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
8c86b9a1 | 332 | duration, nr_readers, nr_writers); |
9e31d0f0 | 333 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 334 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
335 | printf_verbose("thread %-6s, tid %lu\n", |
336 | "main", urcu_get_thread_id()); | |
87bd15cd | 337 | |
9aa14175 MD |
338 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
339 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
340 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
341 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
8c86b9a1 | 342 | |
2a7ac59d MD |
343 | next_aff = 0; |
344 | ||
83e334d0 MJ |
345 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
346 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
347 | &count_reader[i_thr]); | |
f69f195a MD |
348 | if (err != 0) |
349 | exit(1); | |
350 | } | |
83e334d0 MJ |
351 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
352 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
353 | &count_writer[i_thr]); | |
f69f195a MD |
354 | if (err != 0) |
355 | exit(1); | |
356 | } | |
357 | ||
5481ddb3 | 358 | cmm_smp_mb(); |
8c86b9a1 | 359 | |
78efb485 MD |
360 | test_go = 1; |
361 | ||
362 | sleep(duration); | |
363 | ||
364 | test_stop = 1; | |
365 | ||
83e334d0 MJ |
366 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
367 | err = pthread_join(tid_reader[i_thr], &tret); | |
f69f195a MD |
368 | if (err != 0) |
369 | exit(1); | |
83e334d0 | 370 | tot_reads += count_reader[i_thr]; |
f69f195a | 371 | } |
83e334d0 MJ |
372 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
373 | err = pthread_join(tid_writer[i_thr], &tret); | |
f69f195a MD |
374 | if (err != 0) |
375 | exit(1); | |
83e334d0 | 376 | tot_writes += count_writer[i_thr]; |
f69f195a | 377 | } |
83e334d0 | 378 | |
4bad7d45 | 379 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
1eec319e | 380 | tot_writes); |
a50a7b43 | 381 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 382 | "nr_writers %3u " |
9e31d0f0 | 383 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 384 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
385 | nr_writers, wdelay, tot_reads, tot_writes, |
386 | tot_reads + tot_writes); | |
bcc74df3 | 387 | free(test_rcu_pointer); |
8c86b9a1 MD |
388 | free(tid_reader); |
389 | free(tid_writer); | |
390 | free(count_reader); | |
391 | free(count_writer); | |
f69f195a | 392 | return 0; |
ac260fd9 | 393 | } |