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 | ||
23 | #include <stdio.h> | |
24 | #include <pthread.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/wait.h> | |
29 | #include <unistd.h> | |
30 | #include <stdio.h> | |
31 | #include <assert.h> | |
94b343fd | 32 | #include <errno.h> |
10c48e14 | 33 | |
ec4e58a3 | 34 | #include <urcu/arch.h> |
bd252a04 | 35 | #include <urcu/tls-compat.h> |
2953b501 | 36 | #include "cpuset.h" |
94df6318 | 37 | #include "thread-id.h" |
65fcc7e9 | 38 | |
2a7ac59d MD |
39 | /* hardcoded number of CPUs */ |
40 | #define NR_CPUS 16384 | |
41 | ||
10c48e14 MD |
42 | #ifndef DYNAMIC_LINK_TEST |
43 | #define _LGPL_SOURCE | |
10c48e14 | 44 | #endif |
ec4e58a3 | 45 | #include <urcu.h> |
10c48e14 MD |
46 | |
47 | struct test_array { | |
48 | int a; | |
49 | }; | |
50 | ||
89a6a9ce MJ |
51 | /* |
52 | * static rwlock initializer is broken on Cygwin. Use runtime | |
53 | * initialization. | |
54 | */ | |
55 | pthread_rwlock_t lock; | |
10c48e14 | 56 | |
78efb485 | 57 | static volatile int test_go, test_stop; |
10c48e14 | 58 | |
9e31d0f0 | 59 | static unsigned long wdelay; |
10c48e14 | 60 | |
2b4e4125 | 61 | static volatile struct test_array test_array = { 8 }; |
10c48e14 MD |
62 | |
63 | static unsigned long duration; | |
10c48e14 | 64 | |
daddf5b0 | 65 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
66 | static unsigned long rduration; |
67 | ||
31b598e0 MD |
68 | /* write-side C.S. duration, in loops */ |
69 | static unsigned long wduration; | |
70 | ||
ab0aacbe | 71 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 72 | { |
ab0aacbe | 73 | while (loops-- != 0) |
06f22bdb | 74 | caa_cpu_relax(); |
daddf5b0 MD |
75 | } |
76 | ||
4bad7d45 MD |
77 | static int verbose_mode; |
78 | ||
79 | #define printf_verbose(fmt, args...) \ | |
80 | do { \ | |
81 | if (verbose_mode) \ | |
82 | printf(fmt, args); \ | |
83 | } while (0) | |
84 | ||
2a7ac59d MD |
85 | static unsigned int cpu_affinities[NR_CPUS]; |
86 | static unsigned int next_aff = 0; | |
87 | static int use_affinity = 0; | |
88 | ||
6af882ba MD |
89 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
90 | ||
2a7ac59d MD |
91 | static void set_affinity(void) |
92 | { | |
95bc7fb9 | 93 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 94 | cpu_set_t mask; |
95bc7fb9 MD |
95 | int cpu, ret; |
96 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
97 | |
98 | if (!use_affinity) | |
99 | return; | |
100 | ||
d8540fc5 | 101 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
102 | ret = pthread_mutex_lock(&affinity_mutex); |
103 | if (ret) { | |
104 | perror("Error in pthread mutex lock"); | |
105 | exit(-1); | |
106 | } | |
2a7ac59d | 107 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
108 | ret = pthread_mutex_unlock(&affinity_mutex); |
109 | if (ret) { | |
110 | perror("Error in pthread mutex unlock"); | |
111 | exit(-1); | |
112 | } | |
d8540fc5 | 113 | |
2a7ac59d MD |
114 | CPU_ZERO(&mask); |
115 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
116 | #if SCHED_SETAFFINITY_ARGS == 2 |
117 | sched_setaffinity(0, &mask); | |
118 | #else | |
2a7ac59d | 119 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
120 | #endif |
121 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
122 | } |
123 | ||
10c48e14 MD |
124 | /* |
125 | * returns 0 if test should end. | |
126 | */ | |
127 | static int test_duration_write(void) | |
128 | { | |
78efb485 | 129 | return !test_stop; |
10c48e14 MD |
130 | } |
131 | ||
132 | static int test_duration_read(void) | |
133 | { | |
78efb485 | 134 | return !test_stop; |
10c48e14 MD |
135 | } |
136 | ||
bd252a04 MD |
137 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
138 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
10c48e14 MD |
139 | |
140 | static unsigned int nr_readers; | |
141 | static unsigned int nr_writers; | |
142 | ||
143 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
144 | ||
e3717dbc | 145 | static |
10c48e14 MD |
146 | void *thr_reader(void *_count) |
147 | { | |
148 | unsigned long long *count = _count; | |
149 | ||
94df6318 MD |
150 | printf_verbose("thread_begin %s, tid %lu\n", |
151 | "reader", urcu_get_thread_id()); | |
10c48e14 | 152 | |
2a7ac59d MD |
153 | set_affinity(); |
154 | ||
10c48e14 MD |
155 | while (!test_go) |
156 | { | |
157 | } | |
158 | ||
159 | for (;;) { | |
89a6a9ce MJ |
160 | int a, ret; |
161 | ||
162 | ret = pthread_rwlock_rdlock(&lock); | |
163 | if (ret) { | |
164 | fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret)); | |
165 | abort(); | |
166 | } | |
efa8d2c8 | 167 | |
efa8d2c8 MD |
168 | a = test_array.a; |
169 | assert(a == 8); | |
a0b7f7ea | 170 | if (caa_unlikely(rduration)) |
daddf5b0 | 171 | loop_sleep(rduration); |
89a6a9ce MJ |
172 | |
173 | ret = pthread_rwlock_unlock(&lock); | |
174 | if (ret) { | |
175 | fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret)); | |
176 | abort(); | |
177 | } | |
178 | ||
bd252a04 | 179 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 180 | if (caa_unlikely(!test_duration_read())) |
10c48e14 MD |
181 | break; |
182 | } | |
183 | ||
bd252a04 | 184 | *count = URCU_TLS(nr_reads); |
aae4fe1d MJ |
185 | |
186 | printf_verbose("thread_end %s, tid %lu, count %llu\n", | |
187 | "reader", urcu_get_thread_id(), *count); | |
10c48e14 MD |
188 | return ((void*)1); |
189 | ||
190 | } | |
191 | ||
e3717dbc | 192 | static |
10c48e14 MD |
193 | void *thr_writer(void *_count) |
194 | { | |
195 | unsigned long long *count = _count; | |
196 | ||
94df6318 MD |
197 | printf_verbose("thread_begin %s, tid %lu\n", |
198 | "writer", urcu_get_thread_id()); | |
10c48e14 | 199 | |
2a7ac59d MD |
200 | set_affinity(); |
201 | ||
10c48e14 MD |
202 | while (!test_go) |
203 | { | |
204 | } | |
5481ddb3 | 205 | cmm_smp_mb(); |
10c48e14 MD |
206 | |
207 | for (;;) { | |
89a6a9ce MJ |
208 | int ret; |
209 | ||
210 | ret = pthread_rwlock_wrlock(&lock); | |
211 | if (ret) { | |
212 | fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret)); | |
213 | abort(); | |
214 | } | |
215 | ||
2b4e4125 | 216 | test_array.a = 0; |
10c48e14 | 217 | test_array.a = 8; |
a0b7f7ea | 218 | if (caa_unlikely(wduration)) |
31b598e0 | 219 | loop_sleep(wduration); |
89a6a9ce MJ |
220 | |
221 | ret = pthread_rwlock_unlock(&lock); | |
222 | if (ret) { | |
223 | fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret)); | |
224 | abort(); | |
225 | } | |
226 | ||
bd252a04 | 227 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 228 | if (caa_unlikely(!test_duration_write())) |
10c48e14 | 229 | break; |
a0b7f7ea | 230 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 231 | loop_sleep(wdelay); |
10c48e14 | 232 | } |
bd252a04 | 233 | *count = URCU_TLS(nr_writes); |
aae4fe1d MJ |
234 | |
235 | printf_verbose("thread_end %s, tid %lu, count %llu\n", | |
236 | "writer", urcu_get_thread_id(), *count); | |
10c48e14 MD |
237 | return ((void*)2); |
238 | } | |
239 | ||
e3717dbc | 240 | static |
10c48e14 MD |
241 | void show_usage(int argc, char **argv) |
242 | { | |
06637138 MD |
243 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
244 | argv[0]); | |
245 | printf("OPTIONS:\n"); | |
06637138 MD |
246 | printf(" [-d delay] (writer period (us))\n"); |
247 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
248 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
249 | printf(" [-v] (verbose output)\n"); | |
250 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
10c48e14 MD |
251 | printf("\n"); |
252 | } | |
253 | ||
254 | int main(int argc, char **argv) | |
255 | { | |
256 | int err; | |
257 | pthread_t *tid_reader, *tid_writer; | |
258 | void *tret; | |
259 | unsigned long long *count_reader, *count_writer; | |
260 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 261 | int i, a; |
83e334d0 | 262 | unsigned int i_thr; |
10c48e14 MD |
263 | |
264 | if (argc < 4) { | |
265 | show_usage(argc, argv); | |
266 | return -1; | |
267 | } | |
5481ddb3 | 268 | cmm_smp_mb(); |
10c48e14 MD |
269 | |
270 | err = sscanf(argv[1], "%u", &nr_readers); | |
271 | if (err != 1) { | |
272 | show_usage(argc, argv); | |
273 | return -1; | |
274 | } | |
275 | ||
276 | err = sscanf(argv[2], "%u", &nr_writers); | |
277 | if (err != 1) { | |
278 | show_usage(argc, argv); | |
279 | return -1; | |
280 | } | |
281 | ||
282 | err = sscanf(argv[3], "%lu", &duration); | |
283 | if (err != 1) { | |
284 | show_usage(argc, argv); | |
285 | return -1; | |
286 | } | |
287 | ||
288 | for (i = 4; i < argc; i++) { | |
289 | if (argv[i][0] != '-') | |
290 | continue; | |
291 | switch (argv[i][1]) { | |
9e97e478 MD |
292 | case 'a': |
293 | if (argc < i + 2) { | |
294 | show_usage(argc, argv); | |
295 | return -1; | |
296 | } | |
297 | a = atoi(argv[++i]); | |
2a7ac59d | 298 | cpu_affinities[next_aff++] = a; |
9e97e478 | 299 | use_affinity = 1; |
4bad7d45 | 300 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 301 | break; |
8b632bab MD |
302 | case 'c': |
303 | if (argc < i + 2) { | |
304 | show_usage(argc, argv); | |
305 | return -1; | |
306 | } | |
9e31d0f0 | 307 | rduration = atol(argv[++i]); |
8b632bab | 308 | break; |
10c48e14 MD |
309 | case 'd': |
310 | if (argc < i + 2) { | |
311 | show_usage(argc, argv); | |
312 | return -1; | |
313 | } | |
9e31d0f0 | 314 | wdelay = atol(argv[++i]); |
10c48e14 | 315 | break; |
31b598e0 MD |
316 | case 'e': |
317 | if (argc < i + 2) { | |
318 | show_usage(argc, argv); | |
319 | return -1; | |
320 | } | |
321 | wduration = atol(argv[++i]); | |
322 | break; | |
4bad7d45 MD |
323 | case 'v': |
324 | verbose_mode = 1; | |
325 | break; | |
10c48e14 MD |
326 | } |
327 | } | |
328 | ||
4bad7d45 | 329 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 330 | duration, nr_readers, nr_writers); |
9e31d0f0 | 331 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
aae4fe1d | 332 | printf_verbose("Writer duration : %lu loops.\n", wduration); |
4bad7d45 | 333 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
334 | printf_verbose("thread %-6s, tid %lu\n", |
335 | "main", urcu_get_thread_id()); | |
10c48e14 | 336 | |
89a6a9ce MJ |
337 | err = pthread_rwlock_init(&lock, NULL); |
338 | if (err != 0) { | |
339 | fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err)); | |
340 | exit(1); | |
341 | } | |
342 | ||
9aa14175 MD |
343 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
344 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
345 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
346 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
10c48e14 | 347 | |
2a7ac59d MD |
348 | next_aff = 0; |
349 | ||
83e334d0 MJ |
350 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
351 | err = pthread_create(&tid_reader[i_thr], NULL, thr_reader, | |
352 | &count_reader[i_thr]); | |
10c48e14 MD |
353 | if (err != 0) |
354 | exit(1); | |
355 | } | |
83e334d0 MJ |
356 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
357 | err = pthread_create(&tid_writer[i_thr], NULL, thr_writer, | |
358 | &count_writer[i_thr]); | |
10c48e14 MD |
359 | if (err != 0) |
360 | exit(1); | |
361 | } | |
362 | ||
5481ddb3 | 363 | cmm_smp_mb(); |
10c48e14 | 364 | |
78efb485 MD |
365 | test_go = 1; |
366 | ||
367 | sleep(duration); | |
368 | ||
369 | test_stop = 1; | |
370 | ||
83e334d0 MJ |
371 | for (i_thr = 0; i_thr < nr_readers; i_thr++) { |
372 | err = pthread_join(tid_reader[i_thr], &tret); | |
10c48e14 MD |
373 | if (err != 0) |
374 | exit(1); | |
83e334d0 | 375 | tot_reads += count_reader[i_thr]; |
10c48e14 | 376 | } |
83e334d0 MJ |
377 | for (i_thr = 0; i_thr < nr_writers; i_thr++) { |
378 | err = pthread_join(tid_writer[i_thr], &tret); | |
10c48e14 MD |
379 | if (err != 0) |
380 | exit(1); | |
83e334d0 | 381 | tot_writes += count_writer[i_thr]; |
10c48e14 | 382 | } |
4bad7d45 MD |
383 | |
384 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 385 | tot_writes); |
a50a7b43 | 386 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 387 | "nr_writers %3u " |
9e31d0f0 | 388 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 389 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
390 | nr_writers, wdelay, tot_reads, tot_writes, |
391 | tot_reads + tot_writes); | |
392 | ||
89a6a9ce MJ |
393 | err = pthread_rwlock_destroy(&lock); |
394 | if (err != 0) { | |
395 | fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err)); | |
396 | exit(1); | |
397 | } | |
10c48e14 MD |
398 | free(tid_reader); |
399 | free(tid_writer); | |
400 | free(count_reader); | |
401 | free(count_writer); | |
402 | return 0; | |
403 | } |