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 |
f5ab766e | 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> |
2953b501 | 38 | #include "cpuset.h" |
94df6318 | 39 | #include "thread-id.h" |
65fcc7e9 | 40 | |
2a7ac59d MD |
41 | /* hardcoded number of CPUs */ |
42 | #define NR_CPUS 16384 | |
43 | ||
10c48e14 MD |
44 | #ifndef DYNAMIC_LINK_TEST |
45 | #define _LGPL_SOURCE | |
10c48e14 | 46 | #endif |
ec4e58a3 | 47 | #include <urcu.h> |
10c48e14 MD |
48 | |
49 | struct test_array { | |
50 | int a; | |
51 | }; | |
52 | ||
53 | pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; | |
54 | ||
78efb485 | 55 | static volatile int test_go, test_stop; |
10c48e14 | 56 | |
9e31d0f0 | 57 | static unsigned long wdelay; |
10c48e14 | 58 | |
2b4e4125 | 59 | static volatile struct test_array test_array = { 8 }; |
10c48e14 MD |
60 | |
61 | static unsigned long duration; | |
10c48e14 | 62 | |
daddf5b0 | 63 | /* read-side C.S. duration, in loops */ |
8b632bab MD |
64 | static unsigned long rduration; |
65 | ||
31b598e0 MD |
66 | /* write-side C.S. duration, in loops */ |
67 | static unsigned long wduration; | |
68 | ||
ab0aacbe | 69 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 70 | { |
ab0aacbe | 71 | while (loops-- != 0) |
06f22bdb | 72 | caa_cpu_relax(); |
daddf5b0 MD |
73 | } |
74 | ||
4bad7d45 MD |
75 | static int verbose_mode; |
76 | ||
77 | #define printf_verbose(fmt, args...) \ | |
78 | do { \ | |
79 | if (verbose_mode) \ | |
80 | printf(fmt, args); \ | |
81 | } while (0) | |
82 | ||
2a7ac59d MD |
83 | static unsigned int cpu_affinities[NR_CPUS]; |
84 | static unsigned int next_aff = 0; | |
85 | static int use_affinity = 0; | |
86 | ||
6af882ba MD |
87 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
88 | ||
2a7ac59d MD |
89 | static void set_affinity(void) |
90 | { | |
95bc7fb9 | 91 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 92 | cpu_set_t mask; |
95bc7fb9 MD |
93 | int cpu, ret; |
94 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
95 | |
96 | if (!use_affinity) | |
97 | return; | |
98 | ||
d8540fc5 | 99 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
100 | ret = pthread_mutex_lock(&affinity_mutex); |
101 | if (ret) { | |
102 | perror("Error in pthread mutex lock"); | |
103 | exit(-1); | |
104 | } | |
2a7ac59d | 105 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
106 | ret = pthread_mutex_unlock(&affinity_mutex); |
107 | if (ret) { | |
108 | perror("Error in pthread mutex unlock"); | |
109 | exit(-1); | |
110 | } | |
d8540fc5 | 111 | |
2a7ac59d MD |
112 | CPU_ZERO(&mask); |
113 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
114 | #if SCHED_SETAFFINITY_ARGS == 2 |
115 | sched_setaffinity(0, &mask); | |
116 | #else | |
2a7ac59d | 117 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
118 | #endif |
119 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
120 | } |
121 | ||
10c48e14 MD |
122 | /* |
123 | * returns 0 if test should end. | |
124 | */ | |
125 | static int test_duration_write(void) | |
126 | { | |
78efb485 | 127 | return !test_stop; |
10c48e14 MD |
128 | } |
129 | ||
130 | static int test_duration_read(void) | |
131 | { | |
78efb485 | 132 | return !test_stop; |
10c48e14 MD |
133 | } |
134 | ||
bd252a04 MD |
135 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
136 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
10c48e14 MD |
137 | |
138 | static unsigned int nr_readers; | |
139 | static unsigned int nr_writers; | |
140 | ||
141 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
142 | ||
143 | void rcu_copy_mutex_lock(void) | |
144 | { | |
145 | int ret; | |
146 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
147 | if (ret) { | |
148 | perror("Error in pthread mutex lock"); | |
149 | exit(-1); | |
150 | } | |
151 | } | |
152 | ||
153 | void rcu_copy_mutex_unlock(void) | |
154 | { | |
155 | int ret; | |
156 | ||
157 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
158 | if (ret) { | |
159 | perror("Error in pthread mutex unlock"); | |
160 | exit(-1); | |
161 | } | |
162 | } | |
163 | ||
164 | void *thr_reader(void *_count) | |
165 | { | |
166 | unsigned long long *count = _count; | |
167 | ||
94df6318 MD |
168 | printf_verbose("thread_begin %s, tid %lu\n", |
169 | "reader", urcu_get_thread_id()); | |
10c48e14 | 170 | |
2a7ac59d MD |
171 | set_affinity(); |
172 | ||
10c48e14 MD |
173 | while (!test_go) |
174 | { | |
175 | } | |
176 | ||
177 | for (;;) { | |
178 | pthread_rwlock_rdlock(&lock); | |
179 | assert(test_array.a == 8); | |
a0b7f7ea | 180 | if (caa_unlikely(rduration)) |
daddf5b0 | 181 | loop_sleep(rduration); |
10c48e14 | 182 | pthread_rwlock_unlock(&lock); |
bd252a04 | 183 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 184 | if (caa_unlikely(!test_duration_read())) |
10c48e14 MD |
185 | break; |
186 | } | |
187 | ||
bd252a04 | 188 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
189 | printf_verbose("thread_end %s, tid %lu\n", |
190 | "reader", urcu_get_thread_id()); | |
10c48e14 MD |
191 | return ((void*)1); |
192 | ||
193 | } | |
194 | ||
195 | void *thr_writer(void *_count) | |
196 | { | |
197 | unsigned long long *count = _count; | |
198 | ||
94df6318 MD |
199 | printf_verbose("thread_begin %s, tid %lu\n", |
200 | "writer", urcu_get_thread_id()); | |
10c48e14 | 201 | |
2a7ac59d MD |
202 | set_affinity(); |
203 | ||
10c48e14 MD |
204 | while (!test_go) |
205 | { | |
206 | } | |
5481ddb3 | 207 | cmm_smp_mb(); |
10c48e14 MD |
208 | |
209 | for (;;) { | |
210 | pthread_rwlock_wrlock(&lock); | |
2b4e4125 | 211 | test_array.a = 0; |
10c48e14 | 212 | test_array.a = 8; |
a0b7f7ea | 213 | if (caa_unlikely(wduration)) |
31b598e0 | 214 | loop_sleep(wduration); |
10c48e14 | 215 | pthread_rwlock_unlock(&lock); |
bd252a04 | 216 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 217 | if (caa_unlikely(!test_duration_write())) |
10c48e14 | 218 | break; |
a0b7f7ea | 219 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 220 | loop_sleep(wdelay); |
10c48e14 MD |
221 | } |
222 | ||
94df6318 MD |
223 | printf_verbose("thread_end %s, tid %lu\n", |
224 | "writer", urcu_get_thread_id()); | |
bd252a04 | 225 | *count = URCU_TLS(nr_writes); |
10c48e14 MD |
226 | return ((void*)2); |
227 | } | |
228 | ||
229 | void show_usage(int argc, char **argv) | |
230 | { | |
06637138 MD |
231 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
232 | argv[0]); | |
233 | printf("OPTIONS:\n"); | |
06637138 MD |
234 | printf(" [-d delay] (writer period (us))\n"); |
235 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
236 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
237 | printf(" [-v] (verbose output)\n"); | |
238 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
10c48e14 MD |
239 | printf("\n"); |
240 | } | |
241 | ||
242 | int main(int argc, char **argv) | |
243 | { | |
244 | int err; | |
245 | pthread_t *tid_reader, *tid_writer; | |
246 | void *tret; | |
247 | unsigned long long *count_reader, *count_writer; | |
248 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 249 | int i, a; |
10c48e14 MD |
250 | |
251 | if (argc < 4) { | |
252 | show_usage(argc, argv); | |
253 | return -1; | |
254 | } | |
5481ddb3 | 255 | cmm_smp_mb(); |
10c48e14 MD |
256 | |
257 | err = sscanf(argv[1], "%u", &nr_readers); | |
258 | if (err != 1) { | |
259 | show_usage(argc, argv); | |
260 | return -1; | |
261 | } | |
262 | ||
263 | err = sscanf(argv[2], "%u", &nr_writers); | |
264 | if (err != 1) { | |
265 | show_usage(argc, argv); | |
266 | return -1; | |
267 | } | |
268 | ||
269 | err = sscanf(argv[3], "%lu", &duration); | |
270 | if (err != 1) { | |
271 | show_usage(argc, argv); | |
272 | return -1; | |
273 | } | |
274 | ||
275 | for (i = 4; i < argc; i++) { | |
276 | if (argv[i][0] != '-') | |
277 | continue; | |
278 | switch (argv[i][1]) { | |
9e97e478 MD |
279 | case 'a': |
280 | if (argc < i + 2) { | |
281 | show_usage(argc, argv); | |
282 | return -1; | |
283 | } | |
284 | a = atoi(argv[++i]); | |
2a7ac59d | 285 | cpu_affinities[next_aff++] = a; |
9e97e478 | 286 | use_affinity = 1; |
4bad7d45 | 287 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 288 | break; |
8b632bab MD |
289 | case 'c': |
290 | if (argc < i + 2) { | |
291 | show_usage(argc, argv); | |
292 | return -1; | |
293 | } | |
9e31d0f0 | 294 | rduration = atol(argv[++i]); |
8b632bab | 295 | break; |
10c48e14 MD |
296 | case 'd': |
297 | if (argc < i + 2) { | |
298 | show_usage(argc, argv); | |
299 | return -1; | |
300 | } | |
9e31d0f0 | 301 | wdelay = atol(argv[++i]); |
10c48e14 | 302 | break; |
31b598e0 MD |
303 | case 'e': |
304 | if (argc < i + 2) { | |
305 | show_usage(argc, argv); | |
306 | return -1; | |
307 | } | |
308 | wduration = atol(argv[++i]); | |
309 | break; | |
4bad7d45 MD |
310 | case 'v': |
311 | verbose_mode = 1; | |
312 | break; | |
10c48e14 MD |
313 | } |
314 | } | |
315 | ||
4bad7d45 | 316 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 317 | duration, nr_readers, nr_writers); |
9e31d0f0 | 318 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 | 319 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
94df6318 MD |
320 | printf_verbose("thread %-6s, tid %lu\n", |
321 | "main", urcu_get_thread_id()); | |
10c48e14 | 322 | |
9aa14175 MD |
323 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
324 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
325 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
326 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
10c48e14 | 327 | |
2a7ac59d MD |
328 | next_aff = 0; |
329 | ||
10c48e14 MD |
330 | for (i = 0; i < nr_readers; i++) { |
331 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
332 | &count_reader[i]); | |
333 | if (err != 0) | |
334 | exit(1); | |
335 | } | |
336 | for (i = 0; i < nr_writers; i++) { | |
337 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
338 | &count_writer[i]); | |
339 | if (err != 0) | |
340 | exit(1); | |
341 | } | |
342 | ||
5481ddb3 | 343 | cmm_smp_mb(); |
10c48e14 | 344 | |
78efb485 MD |
345 | test_go = 1; |
346 | ||
347 | sleep(duration); | |
348 | ||
349 | test_stop = 1; | |
350 | ||
10c48e14 MD |
351 | for (i = 0; i < nr_readers; i++) { |
352 | err = pthread_join(tid_reader[i], &tret); | |
353 | if (err != 0) | |
354 | exit(1); | |
355 | tot_reads += count_reader[i]; | |
356 | } | |
357 | for (i = 0; i < nr_writers; i++) { | |
358 | err = pthread_join(tid_writer[i], &tret); | |
359 | if (err != 0) | |
360 | exit(1); | |
361 | tot_writes += count_writer[i]; | |
362 | } | |
4bad7d45 MD |
363 | |
364 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 365 | tot_writes); |
a50a7b43 | 366 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 367 | "nr_writers %3u " |
9e31d0f0 | 368 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 369 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
370 | nr_writers, wdelay, tot_reads, tot_writes, |
371 | tot_reads + tot_writes); | |
372 | ||
10c48e14 MD |
373 | free(tid_reader); |
374 | free(tid_writer); | |
375 | free(count_reader); | |
376 | free(count_writer); | |
377 | return 0; | |
378 | } |