Commit | Line | Data |
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10c48e14 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> |
10c48e14 MD |
7 | * |
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. | |
21 | */ | |
22 | ||
9e97e478 | 23 | #define _GNU_SOURCE |
d8540fc5 | 24 | #include "../config.h" |
10c48e14 MD |
25 | #include <stdio.h> |
26 | #include <pthread.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/wait.h> | |
31 | #include <unistd.h> | |
32 | #include <stdio.h> | |
33 | #include <assert.h> | |
94b343fd | 34 | #include <errno.h> |
10c48e14 | 35 | |
ec4e58a3 | 36 | #include <urcu/arch.h> |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
95d8822d | 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 | ||
10c48e14 MD |
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 | ||
62 | #ifndef DYNAMIC_LINK_TEST | |
63 | #define _LGPL_SOURCE | |
64 | #else | |
65 | #define debug_yield_read() | |
66 | #endif | |
ec4e58a3 | 67 | #include <urcu.h> |
10c48e14 MD |
68 | |
69 | struct test_array { | |
70 | int a; | |
71 | }; | |
72 | ||
73 | pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; | |
74 | ||
78efb485 | 75 | static volatile int test_go, test_stop; |
10c48e14 | 76 | |
9e31d0f0 | 77 | static unsigned long wdelay; |
10c48e14 | 78 | |
2b4e4125 | 79 | static volatile struct test_array test_array = { 8 }; |
10c48e14 MD |
80 | |
81 | static unsigned long duration; | |
10c48e14 | 82 | |
daddf5b0 | 83 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
84 | static unsigned long rduration; |
85 | ||
31b598e0 MD |
86 | /* write-side C.S. duration, in loops */ |
87 | static unsigned long wduration; | |
88 | ||
daddf5b0 MD |
89 | static inline void loop_sleep(unsigned long l) |
90 | { | |
91 | while(l-- != 0) | |
06f22bdb | 92 | caa_cpu_relax(); |
daddf5b0 MD |
93 | } |
94 | ||
4bad7d45 MD |
95 | static int verbose_mode; |
96 | ||
97 | #define printf_verbose(fmt, args...) \ | |
98 | do { \ | |
99 | if (verbose_mode) \ | |
100 | printf(fmt, args); \ | |
101 | } while (0) | |
102 | ||
2a7ac59d MD |
103 | static unsigned int cpu_affinities[NR_CPUS]; |
104 | static unsigned int next_aff = 0; | |
105 | static int use_affinity = 0; | |
106 | ||
6af882ba MD |
107 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
108 | ||
2a7ac59d MD |
109 | static void set_affinity(void) |
110 | { | |
111 | cpu_set_t mask; | |
112 | int cpu; | |
6af882ba | 113 | int ret; |
2a7ac59d MD |
114 | |
115 | if (!use_affinity) | |
116 | return; | |
117 | ||
d8540fc5 | 118 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
119 | ret = pthread_mutex_lock(&affinity_mutex); |
120 | if (ret) { | |
121 | perror("Error in pthread mutex lock"); | |
122 | exit(-1); | |
123 | } | |
2a7ac59d | 124 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
125 | ret = pthread_mutex_unlock(&affinity_mutex); |
126 | if (ret) { | |
127 | perror("Error in pthread mutex unlock"); | |
128 | exit(-1); | |
129 | } | |
d8540fc5 | 130 | |
2a7ac59d MD |
131 | CPU_ZERO(&mask); |
132 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
133 | #if SCHED_SETAFFINITY_ARGS == 2 |
134 | sched_setaffinity(0, &mask); | |
135 | #else | |
2a7ac59d | 136 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
137 | #endif |
138 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
139 | } |
140 | ||
10c48e14 MD |
141 | /* |
142 | * returns 0 if test should end. | |
143 | */ | |
144 | static int test_duration_write(void) | |
145 | { | |
78efb485 | 146 | return !test_stop; |
10c48e14 MD |
147 | } |
148 | ||
149 | static int test_duration_read(void) | |
150 | { | |
78efb485 | 151 | return !test_stop; |
10c48e14 MD |
152 | } |
153 | ||
bd252a04 MD |
154 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
155 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
10c48e14 MD |
156 | |
157 | static unsigned int nr_readers; | |
158 | static unsigned int nr_writers; | |
159 | ||
160 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
161 | ||
162 | void rcu_copy_mutex_lock(void) | |
163 | { | |
164 | int ret; | |
165 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
166 | if (ret) { | |
167 | perror("Error in pthread mutex lock"); | |
168 | exit(-1); | |
169 | } | |
170 | } | |
171 | ||
172 | void rcu_copy_mutex_unlock(void) | |
173 | { | |
174 | int ret; | |
175 | ||
176 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
177 | if (ret) { | |
178 | perror("Error in pthread mutex unlock"); | |
179 | exit(-1); | |
180 | } | |
181 | } | |
182 | ||
183 | void *thr_reader(void *_count) | |
184 | { | |
185 | unsigned long long *count = _count; | |
186 | ||
4bad7d45 | 187 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
188 | "reader", (unsigned long) pthread_self(), |
189 | (unsigned long) gettid()); | |
10c48e14 | 190 | |
2a7ac59d MD |
191 | set_affinity(); |
192 | ||
10c48e14 MD |
193 | while (!test_go) |
194 | { | |
195 | } | |
196 | ||
197 | for (;;) { | |
198 | pthread_rwlock_rdlock(&lock); | |
199 | assert(test_array.a == 8); | |
a0b7f7ea | 200 | if (caa_unlikely(rduration)) |
daddf5b0 | 201 | loop_sleep(rduration); |
10c48e14 | 202 | pthread_rwlock_unlock(&lock); |
bd252a04 | 203 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 204 | if (caa_unlikely(!test_duration_read())) |
10c48e14 MD |
205 | break; |
206 | } | |
207 | ||
bd252a04 | 208 | *count = URCU_TLS(nr_reads); |
4bad7d45 | 209 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
210 | "reader", (unsigned long) pthread_self(), |
211 | (unsigned long) gettid()); | |
10c48e14 MD |
212 | return ((void*)1); |
213 | ||
214 | } | |
215 | ||
216 | void *thr_writer(void *_count) | |
217 | { | |
218 | unsigned long long *count = _count; | |
219 | ||
4bad7d45 | 220 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
221 | "writer", (unsigned long) pthread_self(), |
222 | (unsigned long) gettid()); | |
10c48e14 | 223 | |
2a7ac59d MD |
224 | set_affinity(); |
225 | ||
10c48e14 MD |
226 | while (!test_go) |
227 | { | |
228 | } | |
5481ddb3 | 229 | cmm_smp_mb(); |
10c48e14 MD |
230 | |
231 | for (;;) { | |
232 | pthread_rwlock_wrlock(&lock); | |
2b4e4125 | 233 | test_array.a = 0; |
10c48e14 | 234 | test_array.a = 8; |
a0b7f7ea | 235 | if (caa_unlikely(wduration)) |
31b598e0 | 236 | loop_sleep(wduration); |
10c48e14 | 237 | pthread_rwlock_unlock(&lock); |
bd252a04 | 238 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 239 | if (caa_unlikely(!test_duration_write())) |
10c48e14 | 240 | break; |
a0b7f7ea | 241 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 242 | loop_sleep(wdelay); |
10c48e14 MD |
243 | } |
244 | ||
4bad7d45 | 245 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
2d72fae2 MD |
246 | "writer", (unsigned long) pthread_self(), |
247 | (unsigned long) gettid()); | |
bd252a04 | 248 | *count = URCU_TLS(nr_writes); |
10c48e14 MD |
249 | return ((void*)2); |
250 | } | |
251 | ||
252 | void show_usage(int argc, char **argv) | |
253 | { | |
254 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
255 | #ifdef DEBUG_YIELD | |
256 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
257 | #endif | |
7685d963 | 258 | printf(" [-d delay] (writer period (us))"); |
daddf5b0 | 259 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 260 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 261 | printf(" [-v] (verbose output)"); |
9e97e478 | 262 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
10c48e14 MD |
263 | printf("\n"); |
264 | } | |
265 | ||
266 | int main(int argc, char **argv) | |
267 | { | |
268 | int err; | |
269 | pthread_t *tid_reader, *tid_writer; | |
270 | void *tret; | |
271 | unsigned long long *count_reader, *count_writer; | |
272 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 273 | int i, a; |
10c48e14 MD |
274 | |
275 | if (argc < 4) { | |
276 | show_usage(argc, argv); | |
277 | return -1; | |
278 | } | |
5481ddb3 | 279 | cmm_smp_mb(); |
10c48e14 MD |
280 | |
281 | err = sscanf(argv[1], "%u", &nr_readers); | |
282 | if (err != 1) { | |
283 | show_usage(argc, argv); | |
284 | return -1; | |
285 | } | |
286 | ||
287 | err = sscanf(argv[2], "%u", &nr_writers); | |
288 | if (err != 1) { | |
289 | show_usage(argc, argv); | |
290 | return -1; | |
291 | } | |
292 | ||
293 | err = sscanf(argv[3], "%lu", &duration); | |
294 | if (err != 1) { | |
295 | show_usage(argc, argv); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | for (i = 4; i < argc; i++) { | |
300 | if (argv[i][0] != '-') | |
301 | continue; | |
302 | switch (argv[i][1]) { | |
303 | #ifdef DEBUG_YIELD | |
304 | case 'r': | |
305 | yield_active |= YIELD_READ; | |
306 | break; | |
307 | case 'w': | |
308 | yield_active |= YIELD_WRITE; | |
309 | break; | |
310 | #endif | |
9e97e478 MD |
311 | case 'a': |
312 | if (argc < i + 2) { | |
313 | show_usage(argc, argv); | |
314 | return -1; | |
315 | } | |
316 | a = atoi(argv[++i]); | |
2a7ac59d | 317 | cpu_affinities[next_aff++] = a; |
9e97e478 | 318 | use_affinity = 1; |
4bad7d45 | 319 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 320 | break; |
8b632bab MD |
321 | case 'c': |
322 | if (argc < i + 2) { | |
323 | show_usage(argc, argv); | |
324 | return -1; | |
325 | } | |
9e31d0f0 | 326 | rduration = atol(argv[++i]); |
8b632bab | 327 | break; |
10c48e14 MD |
328 | case 'd': |
329 | if (argc < i + 2) { | |
330 | show_usage(argc, argv); | |
331 | return -1; | |
332 | } | |
9e31d0f0 | 333 | wdelay = atol(argv[++i]); |
10c48e14 | 334 | break; |
31b598e0 MD |
335 | case 'e': |
336 | if (argc < i + 2) { | |
337 | show_usage(argc, argv); | |
338 | return -1; | |
339 | } | |
340 | wduration = atol(argv[++i]); | |
341 | break; | |
4bad7d45 MD |
342 | case 'v': |
343 | verbose_mode = 1; | |
344 | break; | |
10c48e14 MD |
345 | } |
346 | } | |
347 | ||
4bad7d45 | 348 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 349 | duration, nr_readers, nr_writers); |
9e31d0f0 | 350 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
351 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
352 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
2d72fae2 MD |
353 | "main", (unsigned long) pthread_self(), |
354 | (unsigned long) gettid()); | |
10c48e14 | 355 | |
f90535ef MD |
356 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
357 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
358 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
359 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
10c48e14 | 360 | |
2a7ac59d MD |
361 | next_aff = 0; |
362 | ||
10c48e14 MD |
363 | for (i = 0; i < nr_readers; i++) { |
364 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
365 | &count_reader[i]); | |
366 | if (err != 0) | |
367 | exit(1); | |
368 | } | |
369 | for (i = 0; i < nr_writers; i++) { | |
370 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
371 | &count_writer[i]); | |
372 | if (err != 0) | |
373 | exit(1); | |
374 | } | |
375 | ||
5481ddb3 | 376 | cmm_smp_mb(); |
10c48e14 | 377 | |
78efb485 MD |
378 | test_go = 1; |
379 | ||
380 | sleep(duration); | |
381 | ||
382 | test_stop = 1; | |
383 | ||
10c48e14 MD |
384 | for (i = 0; i < nr_readers; i++) { |
385 | err = pthread_join(tid_reader[i], &tret); | |
386 | if (err != 0) | |
387 | exit(1); | |
388 | tot_reads += count_reader[i]; | |
389 | } | |
390 | for (i = 0; i < nr_writers; i++) { | |
391 | err = pthread_join(tid_writer[i], &tret); | |
392 | if (err != 0) | |
393 | exit(1); | |
394 | tot_writes += count_writer[i]; | |
395 | } | |
4bad7d45 MD |
396 | |
397 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 398 | tot_writes); |
a50a7b43 | 399 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 400 | "nr_writers %3u " |
9e31d0f0 | 401 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 402 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
403 | nr_writers, wdelay, tot_reads, tot_writes, |
404 | tot_reads + tot_writes); | |
405 | ||
10c48e14 MD |
406 | free(tid_reader); |
407 | free(tid_writer); | |
408 | free(count_reader); | |
409 | free(count_writer); | |
410 | return 0; | |
411 | } |