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> | |
94b343fd | 31 | #include <errno.h> |
87bd15cd | 32 | |
01477510 | 33 | #include <urcu/assert.h> |
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 | { | |
2388c075 | 83 | #ifdef 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 | ||
2388c075 | 91 | #ifdef 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 | ||
61c3fb60 | 131 | static |
1eec319e | 132 | void *thr_reader(void *_count) |
f69f195a | 133 | { |
1eec319e | 134 | unsigned long long *count = _count; |
bcc74df3 | 135 | int *local_ptr; |
41718ff9 | 136 | |
94df6318 MD |
137 | printf_verbose("thread_begin %s, tid %lu\n", |
138 | "reader", urcu_get_thread_id()); | |
f69f195a | 139 | |
2a7ac59d MD |
140 | set_affinity(); |
141 | ||
121a5d44 | 142 | rcu_register_thread(); |
01477510 | 143 | urcu_posix_assert(!rcu_read_ongoing()); |
f69f195a | 144 | |
8c86b9a1 MD |
145 | while (!test_go) |
146 | { | |
147 | } | |
5481ddb3 | 148 | cmm_smp_mb(); |
8c86b9a1 | 149 | |
cf380c2f | 150 | for (;;) { |
1430ee0b | 151 | rcu_read_lock(); |
01477510 | 152 | urcu_posix_assert(rcu_read_ongoing()); |
cf380c2f | 153 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 154 | rcu_debug_yield_read(); |
cf380c2f | 155 | if (local_ptr) |
01477510 | 156 | urcu_posix_assert(*local_ptr == 8); |
a0b7f7ea | 157 | if (caa_unlikely(rduration)) |
daddf5b0 | 158 | loop_sleep(rduration); |
1430ee0b | 159 | rcu_read_unlock(); |
bd252a04 | 160 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 161 | if (caa_unlikely(!test_duration_read())) |
cf380c2f | 162 | break; |
41718ff9 | 163 | } |
f69f195a | 164 | |
121a5d44 | 165 | rcu_unregister_thread(); |
41718ff9 | 166 | |
2b514ae2 MD |
167 | /* test extra thread registration */ |
168 | rcu_register_thread(); | |
169 | rcu_unregister_thread(); | |
170 | ||
bd252a04 | 171 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
172 | printf_verbose("thread_end %s, tid %lu\n", |
173 | "reader", urcu_get_thread_id()); | |
f69f195a MD |
174 | return ((void*)1); |
175 | ||
176 | } | |
177 | ||
61c3fb60 | 178 | static |
1eec319e | 179 | void *thr_writer(void *_count) |
f69f195a | 180 | { |
1eec319e | 181 | unsigned long long *count = _count; |
bcc74df3 | 182 | int *new, *old; |
f69f195a | 183 | |
94df6318 MD |
184 | printf_verbose("thread_begin %s, tid %lu\n", |
185 | "writer", urcu_get_thread_id()); | |
f69f195a | 186 | |
2a7ac59d MD |
187 | set_affinity(); |
188 | ||
8c86b9a1 MD |
189 | while (!test_go) |
190 | { | |
191 | } | |
5481ddb3 | 192 | cmm_smp_mb(); |
8c86b9a1 | 193 | |
cf380c2f | 194 | for (;;) { |
bcc74df3 | 195 | new = malloc(sizeof(int)); |
01477510 | 196 | urcu_posix_assert(new); |
bcc74df3 | 197 | *new = 8; |
d2835e6f | 198 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 199 | if (caa_unlikely(wduration)) |
31b598e0 | 200 | loop_sleep(wduration); |
d2835e6f | 201 | synchronize_rcu(); |
cf380c2f | 202 | if (old) |
bcc74df3 MD |
203 | *old = 0; |
204 | free(old); | |
bd252a04 | 205 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 206 | if (caa_unlikely(!test_duration_write())) |
cf380c2f | 207 | break; |
a0b7f7ea | 208 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 209 | loop_sleep(wdelay); |
f69f195a MD |
210 | } |
211 | ||
94df6318 MD |
212 | printf_verbose("thread_end %s, tid %lu\n", |
213 | "writer", urcu_get_thread_id()); | |
bd252a04 | 214 | *count = URCU_TLS(nr_writes); |
f69f195a MD |
215 | return ((void*)2); |
216 | } | |
ac260fd9 | 217 | |
61c3fb60 | 218 | static |
70469b43 | 219 | void show_usage(char **argv) |
1430ee0b | 220 | { |
06637138 MD |
221 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
222 | argv[0]); | |
223 | printf("OPTIONS:\n"); | |
06637138 | 224 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
225 | printf(" [-d delay] (writer period (us))\n"); |
226 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
227 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
228 | printf(" [-v] (verbose output)\n"); | |
229 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
1430ee0b MD |
230 | printf("\n"); |
231 | } | |
232 | ||
cf380c2f | 233 | int main(int argc, char **argv) |
ac260fd9 | 234 | { |
f69f195a | 235 | int err; |
8c86b9a1 | 236 | pthread_t *tid_reader, *tid_writer; |
f69f195a | 237 | void *tret; |
8c86b9a1 | 238 | unsigned long long *count_reader, *count_writer; |
1eec319e | 239 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 240 | int i, a; |
83e334d0 | 241 | unsigned int i_thr; |
f69f195a | 242 | |
8c86b9a1 | 243 | if (argc < 4) { |
70469b43 | 244 | show_usage(argv); |
8c86b9a1 MD |
245 | return -1; |
246 | } | |
247 | ||
248 | err = sscanf(argv[1], "%u", &nr_readers); | |
249 | if (err != 1) { | |
70469b43 | 250 | show_usage(argv); |
cf380c2f MD |
251 | return -1; |
252 | } | |
253 | ||
8c86b9a1 MD |
254 | err = sscanf(argv[2], "%u", &nr_writers); |
255 | if (err != 1) { | |
70469b43 | 256 | show_usage(argv); |
8c86b9a1 MD |
257 | return -1; |
258 | } | |
83e334d0 | 259 | |
8c86b9a1 | 260 | err = sscanf(argv[3], "%lu", &duration); |
cf380c2f | 261 | if (err != 1) { |
70469b43 | 262 | show_usage(argv); |
cf380c2f MD |
263 | return -1; |
264 | } | |
265 | ||
8c86b9a1 | 266 | for (i = 4; i < argc; i++) { |
cf380c2f MD |
267 | if (argv[i][0] != '-') |
268 | continue; | |
269 | switch (argv[i][1]) { | |
270 | case 'r': | |
2650042a | 271 | rcu_debug_yield_enable(RCU_YIELD_READ); |
cf380c2f MD |
272 | break; |
273 | case 'w': | |
2650042a | 274 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
cf380c2f | 275 | break; |
9e97e478 MD |
276 | case 'a': |
277 | if (argc < i + 2) { | |
70469b43 | 278 | show_usage(argv); |
9e97e478 MD |
279 | return -1; |
280 | } | |
281 | a = atoi(argv[++i]); | |
2a7ac59d | 282 | cpu_affinities[next_aff++] = a; |
9e97e478 | 283 | use_affinity = 1; |
4bad7d45 | 284 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 285 | break; |
8b632bab MD |
286 | case 'c': |
287 | if (argc < i + 2) { | |
70469b43 | 288 | show_usage(argv); |
8b632bab MD |
289 | return -1; |
290 | } | |
9e31d0f0 | 291 | rduration = atol(argv[++i]); |
8b632bab | 292 | break; |
8c86b9a1 | 293 | case 'd': |
7685d963 | 294 | if (argc < i + 2) { |
70469b43 | 295 | show_usage(argv); |
8c86b9a1 MD |
296 | return -1; |
297 | } | |
9e31d0f0 | 298 | wdelay = atol(argv[++i]); |
bb488185 | 299 | break; |
31b598e0 MD |
300 | case 'e': |
301 | if (argc < i + 2) { | |
70469b43 | 302 | show_usage(argv); |
31b598e0 MD |
303 | return -1; |
304 | } | |
305 | wduration = atol(argv[++i]); | |
306 | break; | |
4bad7d45 MD |
307 | case 'v': |
308 | verbose_mode = 1; | |
309 | break; | |
cf380c2f MD |
310 | } |
311 | } | |
cf380c2f | 312 | |
4bad7d45 | 313 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
8c86b9a1 | 314 | duration, nr_readers, nr_writers); |
9e31d0f0 | 315 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 316 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
317 | printf_verbose("thread %-6s, tid %lu\n", |
318 | "main", urcu_get_thread_id()); | |
87bd15cd | 319 | |
9aa14175 MD |
320 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
321 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
322 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
323 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
8c86b9a1 | 324 | |
2a7ac59d MD |
325 | next_aff = 0; |
326 | ||
83e334d0 MJ |
327 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
328 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
329 | &count_reader[i_thr]); | |
f69f195a MD |
330 | if (err != 0) |
331 | exit(1); | |
332 | } | |
83e334d0 MJ |
333 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
334 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
335 | &count_writer[i_thr]); | |
f69f195a MD |
336 | if (err != 0) |
337 | exit(1); | |
338 | } | |
339 | ||
5481ddb3 | 340 | cmm_smp_mb(); |
8c86b9a1 | 341 | |
78efb485 MD |
342 | test_go = 1; |
343 | ||
344 | sleep(duration); | |
345 | ||
346 | test_stop = 1; | |
347 | ||
83e334d0 MJ |
348 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
349 | err = pthread_join(tid_reader[i_thr], &tret); | |
f69f195a MD |
350 | if (err != 0) |
351 | exit(1); | |
83e334d0 | 352 | tot_reads += count_reader[i_thr]; |
f69f195a | 353 | } |
83e334d0 MJ |
354 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
355 | err = pthread_join(tid_writer[i_thr], &tret); | |
f69f195a MD |
356 | if (err != 0) |
357 | exit(1); | |
83e334d0 | 358 | tot_writes += count_writer[i_thr]; |
f69f195a | 359 | } |
83e334d0 | 360 | |
4bad7d45 | 361 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
1eec319e | 362 | tot_writes); |
a50a7b43 | 363 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 364 | "nr_writers %3u " |
9e31d0f0 | 365 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 366 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
367 | nr_writers, wdelay, tot_reads, tot_writes, |
368 | tot_reads + tot_writes); | |
bcc74df3 | 369 | free(test_rcu_pointer); |
8c86b9a1 MD |
370 | free(tid_reader); |
371 | free(tid_writer); | |
372 | free(count_reader); | |
373 | free(count_writer); | |
f69f195a | 374 | return 0; |
ac260fd9 | 375 | } |