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> | |
9e97e478 | 34 | #include <sched.h> |
94b343fd | 35 | #include <errno.h> |
10c48e14 | 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 | ||
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 | ||
ab0aacbe | 89 | static inline void loop_sleep(unsigned long loops) |
daddf5b0 | 90 | { |
ab0aacbe | 91 | while (loops-- != 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 | ||
d8540fc5 PA |
109 | #ifndef HAVE_CPU_SET_T |
110 | typedef unsigned long cpu_set_t; | |
111 | # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0) | |
112 | # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0) | |
113 | #endif | |
114 | ||
2a7ac59d MD |
115 | static void set_affinity(void) |
116 | { | |
95bc7fb9 | 117 | #if HAVE_SCHED_SETAFFINITY |
2a7ac59d | 118 | cpu_set_t mask; |
95bc7fb9 MD |
119 | int cpu, ret; |
120 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
121 | |
122 | if (!use_affinity) | |
123 | return; | |
124 | ||
d8540fc5 | 125 | #if HAVE_SCHED_SETAFFINITY |
6af882ba MD |
126 | ret = pthread_mutex_lock(&affinity_mutex); |
127 | if (ret) { | |
128 | perror("Error in pthread mutex lock"); | |
129 | exit(-1); | |
130 | } | |
2a7ac59d | 131 | cpu = cpu_affinities[next_aff++]; |
6af882ba MD |
132 | ret = pthread_mutex_unlock(&affinity_mutex); |
133 | if (ret) { | |
134 | perror("Error in pthread mutex unlock"); | |
135 | exit(-1); | |
136 | } | |
d8540fc5 | 137 | |
2a7ac59d MD |
138 | CPU_ZERO(&mask); |
139 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
140 | #if SCHED_SETAFFINITY_ARGS == 2 |
141 | sched_setaffinity(0, &mask); | |
142 | #else | |
2a7ac59d | 143 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
144 | #endif |
145 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
2a7ac59d MD |
146 | } |
147 | ||
10c48e14 MD |
148 | /* |
149 | * returns 0 if test should end. | |
150 | */ | |
151 | static int test_duration_write(void) | |
152 | { | |
78efb485 | 153 | return !test_stop; |
10c48e14 MD |
154 | } |
155 | ||
156 | static int test_duration_read(void) | |
157 | { | |
78efb485 | 158 | return !test_stop; |
10c48e14 MD |
159 | } |
160 | ||
bd252a04 MD |
161 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
162 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
10c48e14 MD |
163 | |
164 | static unsigned int nr_readers; | |
165 | static unsigned int nr_writers; | |
166 | ||
167 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
168 | ||
169 | void rcu_copy_mutex_lock(void) | |
170 | { | |
171 | int ret; | |
172 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
173 | if (ret) { | |
174 | perror("Error in pthread mutex lock"); | |
175 | exit(-1); | |
176 | } | |
177 | } | |
178 | ||
179 | void rcu_copy_mutex_unlock(void) | |
180 | { | |
181 | int ret; | |
182 | ||
183 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
184 | if (ret) { | |
185 | perror("Error in pthread mutex unlock"); | |
186 | exit(-1); | |
187 | } | |
188 | } | |
189 | ||
190 | void *thr_reader(void *_count) | |
191 | { | |
192 | unsigned long long *count = _count; | |
193 | ||
4bad7d45 | 194 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
195 | "reader", pthread_self(), (unsigned long)gettid()); |
196 | ||
2a7ac59d MD |
197 | set_affinity(); |
198 | ||
10c48e14 MD |
199 | while (!test_go) |
200 | { | |
201 | } | |
202 | ||
203 | for (;;) { | |
204 | pthread_rwlock_rdlock(&lock); | |
205 | assert(test_array.a == 8); | |
a0b7f7ea | 206 | if (caa_unlikely(rduration)) |
daddf5b0 | 207 | loop_sleep(rduration); |
10c48e14 | 208 | pthread_rwlock_unlock(&lock); |
bd252a04 | 209 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 210 | if (caa_unlikely(!test_duration_read())) |
10c48e14 MD |
211 | break; |
212 | } | |
213 | ||
bd252a04 | 214 | *count = URCU_TLS(nr_reads); |
4bad7d45 | 215 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
216 | "reader", pthread_self(), (unsigned long)gettid()); |
217 | return ((void*)1); | |
218 | ||
219 | } | |
220 | ||
221 | void *thr_writer(void *_count) | |
222 | { | |
223 | unsigned long long *count = _count; | |
224 | ||
4bad7d45 | 225 | printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n", |
10c48e14 MD |
226 | "writer", pthread_self(), (unsigned long)gettid()); |
227 | ||
2a7ac59d MD |
228 | set_affinity(); |
229 | ||
10c48e14 MD |
230 | while (!test_go) |
231 | { | |
232 | } | |
5481ddb3 | 233 | cmm_smp_mb(); |
10c48e14 MD |
234 | |
235 | for (;;) { | |
236 | pthread_rwlock_wrlock(&lock); | |
2b4e4125 | 237 | test_array.a = 0; |
10c48e14 | 238 | test_array.a = 8; |
a0b7f7ea | 239 | if (caa_unlikely(wduration)) |
31b598e0 | 240 | loop_sleep(wduration); |
10c48e14 | 241 | pthread_rwlock_unlock(&lock); |
bd252a04 | 242 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 243 | if (caa_unlikely(!test_duration_write())) |
10c48e14 | 244 | break; |
a0b7f7ea | 245 | if (caa_unlikely(wdelay)) |
9e31d0f0 | 246 | loop_sleep(wdelay); |
10c48e14 MD |
247 | } |
248 | ||
4bad7d45 | 249 | printf_verbose("thread_end %s, thread id : %lx, tid %lu\n", |
10c48e14 | 250 | "writer", pthread_self(), (unsigned long)gettid()); |
bd252a04 | 251 | *count = URCU_TLS(nr_writes); |
10c48e14 MD |
252 | return ((void*)2); |
253 | } | |
254 | ||
255 | void show_usage(int argc, char **argv) | |
256 | { | |
257 | printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]); | |
258 | #ifdef DEBUG_YIELD | |
259 | printf(" [-r] [-w] (yield reader and/or writer)"); | |
260 | #endif | |
7685d963 | 261 | printf(" [-d delay] (writer period (us))"); |
daddf5b0 | 262 | printf(" [-c duration] (reader C.S. duration (in loops))"); |
31b598e0 | 263 | printf(" [-e duration] (writer C.S. duration (in loops))"); |
4bad7d45 | 264 | printf(" [-v] (verbose output)"); |
9e97e478 | 265 | printf(" [-a cpu#] [-a cpu#]... (affinity)"); |
10c48e14 MD |
266 | printf("\n"); |
267 | } | |
268 | ||
269 | int main(int argc, char **argv) | |
270 | { | |
271 | int err; | |
272 | pthread_t *tid_reader, *tid_writer; | |
273 | void *tret; | |
274 | unsigned long long *count_reader, *count_writer; | |
275 | unsigned long long tot_reads = 0, tot_writes = 0; | |
9e97e478 | 276 | int i, a; |
10c48e14 MD |
277 | |
278 | if (argc < 4) { | |
279 | show_usage(argc, argv); | |
280 | return -1; | |
281 | } | |
5481ddb3 | 282 | cmm_smp_mb(); |
10c48e14 MD |
283 | |
284 | err = sscanf(argv[1], "%u", &nr_readers); | |
285 | if (err != 1) { | |
286 | show_usage(argc, argv); | |
287 | return -1; | |
288 | } | |
289 | ||
290 | err = sscanf(argv[2], "%u", &nr_writers); | |
291 | if (err != 1) { | |
292 | show_usage(argc, argv); | |
293 | return -1; | |
294 | } | |
295 | ||
296 | err = sscanf(argv[3], "%lu", &duration); | |
297 | if (err != 1) { | |
298 | show_usage(argc, argv); | |
299 | return -1; | |
300 | } | |
301 | ||
302 | for (i = 4; i < argc; i++) { | |
303 | if (argv[i][0] != '-') | |
304 | continue; | |
305 | switch (argv[i][1]) { | |
306 | #ifdef DEBUG_YIELD | |
307 | case 'r': | |
308 | yield_active |= YIELD_READ; | |
309 | break; | |
310 | case 'w': | |
311 | yield_active |= YIELD_WRITE; | |
312 | break; | |
313 | #endif | |
9e97e478 MD |
314 | case 'a': |
315 | if (argc < i + 2) { | |
316 | show_usage(argc, argv); | |
317 | return -1; | |
318 | } | |
319 | a = atoi(argv[++i]); | |
2a7ac59d | 320 | cpu_affinities[next_aff++] = a; |
9e97e478 | 321 | use_affinity = 1; |
4bad7d45 | 322 | printf_verbose("Adding CPU %d affinity\n", a); |
9e97e478 | 323 | break; |
8b632bab MD |
324 | case 'c': |
325 | if (argc < i + 2) { | |
326 | show_usage(argc, argv); | |
327 | return -1; | |
328 | } | |
9e31d0f0 | 329 | rduration = atol(argv[++i]); |
8b632bab | 330 | break; |
10c48e14 MD |
331 | case 'd': |
332 | if (argc < i + 2) { | |
333 | show_usage(argc, argv); | |
334 | return -1; | |
335 | } | |
9e31d0f0 | 336 | wdelay = atol(argv[++i]); |
10c48e14 | 337 | break; |
31b598e0 MD |
338 | case 'e': |
339 | if (argc < i + 2) { | |
340 | show_usage(argc, argv); | |
341 | return -1; | |
342 | } | |
343 | wduration = atol(argv[++i]); | |
344 | break; | |
4bad7d45 MD |
345 | case 'v': |
346 | verbose_mode = 1; | |
347 | break; | |
10c48e14 MD |
348 | } |
349 | } | |
350 | ||
4bad7d45 | 351 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", |
10c48e14 | 352 | duration, nr_readers, nr_writers); |
9e31d0f0 | 353 | printf_verbose("Writer delay : %lu loops.\n", wdelay); |
4bad7d45 MD |
354 | printf_verbose("Reader duration : %lu loops.\n", rduration); |
355 | printf_verbose("thread %-6s, thread id : %lx, tid %lu\n", | |
10c48e14 MD |
356 | "main", pthread_self(), (unsigned long)gettid()); |
357 | ||
358 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); | |
359 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
360 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
361 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
362 | ||
2a7ac59d MD |
363 | next_aff = 0; |
364 | ||
10c48e14 MD |
365 | for (i = 0; i < nr_readers; i++) { |
366 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
367 | &count_reader[i]); | |
368 | if (err != 0) | |
369 | exit(1); | |
370 | } | |
371 | for (i = 0; i < nr_writers; i++) { | |
372 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
373 | &count_writer[i]); | |
374 | if (err != 0) | |
375 | exit(1); | |
376 | } | |
377 | ||
5481ddb3 | 378 | cmm_smp_mb(); |
10c48e14 | 379 | |
78efb485 MD |
380 | test_go = 1; |
381 | ||
382 | sleep(duration); | |
383 | ||
384 | test_stop = 1; | |
385 | ||
10c48e14 MD |
386 | for (i = 0; i < nr_readers; i++) { |
387 | err = pthread_join(tid_reader[i], &tret); | |
388 | if (err != 0) | |
389 | exit(1); | |
390 | tot_reads += count_reader[i]; | |
391 | } | |
392 | for (i = 0; i < nr_writers; i++) { | |
393 | err = pthread_join(tid_writer[i], &tret); | |
394 | if (err != 0) | |
395 | exit(1); | |
396 | tot_writes += count_writer[i]; | |
397 | } | |
4bad7d45 MD |
398 | |
399 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
10c48e14 | 400 | tot_writes); |
a50a7b43 | 401 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
cda3c71d | 402 | "nr_writers %3u " |
9e31d0f0 | 403 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", |
a50a7b43 | 404 | argv[0], duration, nr_readers, rduration, wduration, |
4bad7d45 MD |
405 | nr_writers, wdelay, tot_reads, tot_writes, |
406 | tot_reads + tot_writes); | |
407 | ||
10c48e14 MD |
408 | free(tid_reader); |
409 | free(tid_writer); | |
410 | free(count_reader); | |
411 | free(count_writer); | |
412 | return 0; | |
413 | } |