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> |
9e97e478 | 34 | #include <sched.h> |
94b343fd | 35 | #include <errno.h> |
87bd15cd | 36 | |
ec4e58a3 | 37 | #include <urcu/arch.h> |
bd252a04 | 38 | #include <urcu/tls-compat.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 | ||
d8540fc5 PA |
103 | #ifndef HAVE_CPU_SET_T |
104 | typedef unsigned long cpu_set_t; | |
105 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
106 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
107 | #endif | |
108 | ||
2a7ac59d MD |
109 | static void set_affinity(void) |
110 | { | |
95bc7fb9 | 111 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 112 | cpu_set_t mask; |
95bc7fb9 MD |
113 | int cpu, ret; |
114 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
115 | |
116 | if (!use_affinity) | |
117 | return; | |
118 | ||
d8540fc5 | 119 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d MD |
120 | ret = pthread_mutex_lock(&affinity_mutex); |
121 | if (ret) { | |
122 | perror("Error in pthread mutex lock"); | |
123 | exit(-1); | |
124 | } | |
125 | cpu = cpu_affinities[next_aff++]; | |
126 | ret = pthread_mutex_unlock(&affinity_mutex); | |
127 | if (ret) { | |
128 | perror("Error in pthread mutex unlock"); | |
129 | exit(-1); | |
130 | } | |
d8540fc5 | 131 | |
2a7ac59d MD |
132 | CPU_ZERO(&mask); |
133 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
134 | #if SCHED_SETAFFINITY_ARGS == 2 |
135 | sched_setaffinity(0, &mask); | |
136 | #else | |
2a7ac59d | 137 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
138 | #endif |
139 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
140 | } |
141 | ||
cf380c2f MD |
142 | /* |
143 | * returns 0 if test should end. | |
144 | */ | |
5873cd17 | 145 | static int test_duration_write(void) |
cf380c2f | 146 | { |
78efb485 | 147 | return !test_stop; |
5873cd17 MD |
148 | } |
149 | ||
150 | static int test_duration_read(void) | |
151 | { | |
78efb485 | 152 | return !test_stop; |
cf380c2f MD |
153 | } |
154 | ||
bd252a04 MD |
155 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
156 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
1eec319e | 157 | |
8c86b9a1 MD |
158 | static unsigned int nr_readers; |
159 | static unsigned int nr_writers; | |
160 | ||
c265818b MD |
161 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; |
162 | ||
163 | void rcu_copy_mutex_lock(void) | |
164 | { | |
165 | int ret; | |
166 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
167 | if (ret) { | |
168 | perror("Error in pthread mutex lock"); | |
169 | exit(-1); | |
170 | } | |
171 | } | |
172 | ||
173 | void rcu_copy_mutex_unlock(void) | |
174 | { | |
175 | int ret; | |
176 | ||
177 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
178 | if (ret) { | |
179 | perror("Error in pthread mutex unlock"); | |
180 | exit(-1); | |
181 | } | |
182 | } | |
f69f195a | 183 | |
1eec319e | 184 | void *thr_reader(void *_count) |
f69f195a | 185 | { |
1eec319e | 186 | unsigned long long *count = _count; |
bcc74df3 | 187 | int *local_ptr; |
41718ff9 | 188 | |
4bad7d45 | 189 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
190 | "reader", (unsigned long) pthread_self(), |
191 | (unsigned long) gettid()); | |
f69f195a | 192 | |
2a7ac59d MD |
193 | set_affinity(); |
194 | ||
121a5d44 | 195 | rcu_register_thread(); |
f69f195a | 196 | |
8c86b9a1 MD |
197 | while (!test_go) |
198 | { | |
199 | } | |
5481ddb3 | 200 | cmm_smp_mb(); |
8c86b9a1 | 201 | |
cf380c2f | 202 | for (;;) { |
1430ee0b | 203 | rcu_read_lock(); |
cf380c2f | 204 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 205 | rcu_debug_yield_read(); |
cf380c2f | 206 | if (local_ptr) |
bcc74df3 | 207 | assert(*local_ptr == 8); |
a0b7f7ea | 208 | if (caa_unlikely(rduration)) |
daddf5b0 | 209 | loop_sleep(rduration); |
1430ee0b | 210 | rcu_read_unlock(); |
bd252a04 | 211 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 212 | if (caa_unlikely(!test_duration_read())) |
cf380c2f | 213 | break; |
41718ff9 | 214 | } |
f69f195a | 215 | |
121a5d44 | 216 | rcu_unregister_thread(); |
41718ff9 | 217 | |
2b514ae2 MD |
218 | /* test extra thread registration */ |
219 | rcu_register_thread(); | |
220 | rcu_unregister_thread(); | |
221 | ||
bd252a04 | 222 | *count = URCU_TLS(nr_reads); |
4bad7d45 | 223 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
224 | "reader", (unsigned long) pthread_self(), |
225 | (unsigned long) gettid()); | |
f69f195a MD |
226 | return ((void*)1); |
227 | ||
228 | } | |
229 | ||
1eec319e | 230 | void *thr_writer(void *_count) |
f69f195a | 231 | { |
1eec319e | 232 | unsigned long long *count = _count; |
bcc74df3 | 233 | int *new, *old; |
f69f195a | 234 | |
4bad7d45 | 235 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
236 | "writer", (unsigned long) pthread_self(), |
237 | (unsigned long) gettid()); | |
f69f195a | 238 | |
2a7ac59d MD |
239 | set_affinity(); |
240 | ||
8c86b9a1 MD |
241 | while (!test_go) |
242 | { | |
243 | } | |
5481ddb3 | 244 | cmm_smp_mb(); |
8c86b9a1 | 245 | |
cf380c2f | 246 | for (;;) { |
bcc74df3 MD |
247 | new = malloc(sizeof(int)); |
248 | assert(new); | |
249 | *new = 8; | |
d2835e6f | 250 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 251 | if (caa_unlikely(wduration)) |
31b598e0 | 252 | loop_sleep(wduration); |
d2835e6f | 253 | synchronize_rcu(); |
cf380c2f | 254 | if (old) |
bcc74df3 MD |
255 | *old = 0; |
256 | free(old); | |
bd252a04 | 257 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 258 | if (caa_unlikely(!test_duration_write())) |
cf380c2f | 259 | break; |
a0b7f7ea | 260 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 261 | loop_sleep(wdelay); |
f69f195a MD |
262 | } |
263 | ||
4bad7d45 | 264 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
6ff854ac MD |
265 | "writer", (unsigned long) pthread_self(), |
266 | (unsigned long) gettid()); | |
bd252a04 | 267 | *count = URCU_TLS(nr_writes); |
f69f195a MD |
268 | return ((void*)2); |
269 | } | |
ac260fd9 | 270 | |
1430ee0b MD |
271 | void show_usage(int argc, char **argv) |
272 | { | |
8c86b9a1 | 273 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); |
1430ee0b MD |
274 | #ifdef DEBUG_YIELD |
275 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
276 | #endif | |
7685d963 | 277 | printf(" [-d delay] (writer period (us))"); |
daddf5b0 | 278 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 279 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 280 | printf(" [-v] (verbose output)"); |
9e97e478 | 281 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
1430ee0b MD |
282 | printf("\n"); |
283 | } | |
284 | ||
cf380c2f | 285 | int main(int argc, char **argv) |
ac260fd9 | 286 | { |
f69f195a | 287 | int err; |
8c86b9a1 | 288 | pthread_t *tid_reader, *tid_writer; |
f69f195a | 289 | void *tret; |
8c86b9a1 | 290 | unsigned long long *count_reader, *count_writer; |
1eec319e | 291 | unsigned long long tot_reads = 0, tot_writes = 0; |
9e97e478 | 292 | int i, a; |
f69f195a | 293 | |
8c86b9a1 MD |
294 | if (argc < 4) { |
295 | show_usage(argc, argv); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | err = sscanf(argv[1], "%u", &nr_readers); | |
300 | if (err != 1) { | |
1430ee0b | 301 | show_usage(argc, argv); |
cf380c2f MD |
302 | return -1; |
303 | } | |
304 | ||
8c86b9a1 MD |
305 | err = sscanf(argv[2], "%u", &nr_writers); |
306 | if (err != 1) { | |
307 | show_usage(argc, argv); | |
308 | return -1; | |
309 | } | |
310 | ||
311 | err = sscanf(argv[3], "%lu", &duration); | |
cf380c2f | 312 | if (err != 1) { |
1430ee0b | 313 | show_usage(argc, argv); |
cf380c2f MD |
314 | return -1; |
315 | } | |
316 | ||
8c86b9a1 | 317 | for (i = 4; i < argc; i++) { |
cf380c2f MD |
318 | if (argv[i][0] != '-') |
319 | continue; | |
320 | switch (argv[i][1]) { | |
bb488185 | 321 | #ifdef DEBUG_YIELD |
cf380c2f | 322 | case 'r': |
1de4df4b | 323 | rcu_yield_active |= RCU_YIELD_READ; |
cf380c2f MD |
324 | break; |
325 | case 'w': | |
1de4df4b | 326 | rcu_yield_active |= RCU_YIELD_WRITE; |
cf380c2f | 327 | break; |
bb488185 | 328 | #endif |
9e97e478 MD |
329 | case 'a': |
330 | if (argc < i + 2) { | |
331 | show_usage(argc, argv); | |
332 | return -1; | |
333 | } | |
334 | a = atoi(argv[++i]); | |
2a7ac59d | 335 | cpu_affinities[next_aff++] = a; |
9e97e478 | 336 | use_affinity = 1; |
4bad7d45 | 337 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 338 | break; |
8b632bab MD |
339 | case 'c': |
340 | if (argc < i + 2) { | |
341 | show_usage(argc, argv); | |
342 | return -1; | |
343 | } | |
9e31d0f0 | 344 | rduration = atol(argv[++i]); |
8b632bab | 345 | break; |
8c86b9a1 | 346 | case 'd': |
7685d963 | 347 | if (argc < i + 2) { |
8c86b9a1 MD |
348 | show_usage(argc, argv); |
349 | return -1; | |
350 | } | |
9e31d0f0 | 351 | wdelay = atol(argv[++i]); |
bb488185 | 352 | break; |
31b598e0 MD |
353 | case 'e': |
354 | if (argc < i + 2) { | |
355 | show_usage(argc, argv); | |
356 | return -1; | |
357 | } | |
358 | wduration = atol(argv[++i]); | |
359 | break; | |
4bad7d45 MD |
360 | case 'v': |
361 | verbose_mode = 1; | |
362 | break; | |
cf380c2f MD |
363 | } |
364 | } | |
cf380c2f | 365 | |
4bad7d45 | 366 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
8c86b9a1 | 367 | duration, nr_readers, nr_writers); |
9e31d0f0 | 368 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
369 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
370 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
6ff854ac MD |
371 | "main", (unsigned long) pthread_self(), |
372 | (unsigned long)gettid()); | |
87bd15cd | 373 | |
8c86b9a1 MD |
374 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
375 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
376 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
377 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
378 | ||
2a7ac59d MD |
379 | next_aff = 0; |
380 | ||
8c86b9a1 | 381 | for (i = 0; i < nr_readers; i++) { |
1eec319e MD |
382 | err = pthread_create(&tid_reader[i], NULL, thr_reader, |
383 | &count_reader[i]); | |
f69f195a MD |
384 | if (err != 0) |
385 | exit(1); | |
386 | } | |
8c86b9a1 | 387 | for (i = 0; i < nr_writers; i++) { |
1eec319e MD |
388 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
389 | &count_writer[i]); | |
f69f195a MD |
390 | if (err != 0) |
391 | exit(1); | |
392 | } | |
393 | ||
5481ddb3 | 394 | cmm_smp_mb(); |
8c86b9a1 | 395 | |
78efb485 MD |
396 | test_go = 1; |
397 | ||
398 | sleep(duration); | |
399 | ||
400 | test_stop = 1; | |
401 | ||
8c86b9a1 | 402 | for (i = 0; i < nr_readers; i++) { |
f69f195a MD |
403 | err = pthread_join(tid_reader[i], &tret); |
404 | if (err != 0) | |
405 | exit(1); | |
1eec319e | 406 | tot_reads += count_reader[i]; |
f69f195a | 407 | } |
8c86b9a1 | 408 | for (i = 0; i < nr_writers; i++) { |
f69f195a MD |
409 | err = pthread_join(tid_writer[i], &tret); |
410 | if (err != 0) | |
411 | exit(1); | |
1eec319e | 412 | tot_writes += count_writer[i]; |
f69f195a | 413 | } |
5873cd17 | 414 | |
4bad7d45 | 415 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, |
1eec319e | 416 | tot_writes); |
a50a7b43 | 417 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 418 | "nr_writers %3u " |
9e31d0f0 | 419 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 420 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
421 | nr_writers, wdelay, tot_reads, tot_writes, |
422 | tot_reads + tot_writes); | |
bcc74df3 | 423 | free(test_rcu_pointer); |
8c86b9a1 MD |
424 | free(tid_reader); |
425 | free(tid_writer); | |
426 | free(count_reader); | |
427 | free(count_writer); | |
f69f195a | 428 | return 0; |
ac260fd9 | 429 | } |