Commit | Line | Data |
---|---|---|
de10a585 MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
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 | #define _GNU_SOURCE | |
f5ab766e | 24 | #include "config.h" |
de10a585 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> | |
de10a585 MD |
34 | #include <errno.h> |
35 | ||
36 | #include <urcu/arch.h> | |
bd252a04 | 37 | #include <urcu/tls-compat.h> |
2953b501 | 38 | #include "cpuset.h" |
94df6318 | 39 | #include "thread-id.h" |
2650042a | 40 | #include "../common/debug-yield.h" |
de10a585 MD |
41 | |
42 | /* hardcoded number of CPUs */ | |
43 | #define NR_CPUS 16384 | |
44 | ||
de10a585 MD |
45 | #ifndef DYNAMIC_LINK_TEST |
46 | #define _LGPL_SOURCE | |
de10a585 MD |
47 | #endif |
48 | #include "urcu-qsbr.h" | |
49 | ||
de10a585 MD |
50 | static volatile int test_go, test_stop; |
51 | ||
52 | static unsigned long wdelay; | |
53 | ||
bcc74df3 | 54 | static int *test_rcu_pointer; |
de10a585 MD |
55 | |
56 | static unsigned long duration; | |
57 | ||
58 | /* read-side C.S. duration, in loops */ | |
59 | static unsigned long rduration; | |
60 | ||
61 | /* write-side C.S. duration, in loops */ | |
62 | static unsigned long wduration; | |
63 | ||
ab0aacbe | 64 | static inline void loop_sleep(unsigned long loops) |
de10a585 | 65 | { |
ab0aacbe | 66 | while (loops-- != 0) |
de10a585 MD |
67 | caa_cpu_relax(); |
68 | } | |
69 | ||
70 | static int verbose_mode; | |
71 | ||
72 | #define printf_verbose(fmt, args...) \ | |
73 | do { \ | |
74 | if (verbose_mode) \ | |
75 | printf(fmt, args); \ | |
76 | } while (0) | |
77 | ||
78 | static unsigned int cpu_affinities[NR_CPUS]; | |
79 | static unsigned int next_aff = 0; | |
80 | static int use_affinity = 0; | |
81 | ||
82 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
83 | ||
de10a585 MD |
84 | static void set_affinity(void) |
85 | { | |
95bc7fb9 | 86 | #if HAVE_SCHED_SETAFFINITY |
de10a585 | 87 | cpu_set_t mask; |
95bc7fb9 MD |
88 | int cpu, ret; |
89 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
de10a585 MD |
90 | |
91 | if (!use_affinity) | |
92 | return; | |
93 | ||
94 | #if HAVE_SCHED_SETAFFINITY | |
95 | ret = pthread_mutex_lock(&affinity_mutex); | |
96 | if (ret) { | |
97 | perror("Error in pthread mutex lock"); | |
98 | exit(-1); | |
99 | } | |
100 | cpu = cpu_affinities[next_aff++]; | |
101 | ret = pthread_mutex_unlock(&affinity_mutex); | |
102 | if (ret) { | |
103 | perror("Error in pthread mutex unlock"); | |
104 | exit(-1); | |
105 | } | |
106 | CPU_ZERO(&mask); | |
107 | CPU_SET(cpu, &mask); | |
108 | #if SCHED_SETAFFINITY_ARGS == 2 | |
109 | sched_setaffinity(0, &mask); | |
110 | #else | |
111 | sched_setaffinity(0, sizeof(mask), &mask); | |
112 | #endif | |
113 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
114 | } | |
115 | ||
116 | /* | |
117 | * returns 0 if test should end. | |
118 | */ | |
119 | static int test_duration_write(void) | |
120 | { | |
121 | return !test_stop; | |
122 | } | |
123 | ||
124 | static int test_duration_read(void) | |
125 | { | |
126 | return !test_stop; | |
127 | } | |
128 | ||
bd252a04 MD |
129 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
130 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
de10a585 MD |
131 | |
132 | static unsigned int nr_readers; | |
133 | static unsigned int nr_writers; | |
134 | ||
135 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
136 | ||
137 | void rcu_copy_mutex_lock(void) | |
138 | { | |
139 | int ret; | |
140 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
141 | if (ret) { | |
142 | perror("Error in pthread mutex lock"); | |
143 | exit(-1); | |
144 | } | |
145 | } | |
146 | ||
147 | void rcu_copy_mutex_unlock(void) | |
148 | { | |
149 | int ret; | |
150 | ||
151 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
152 | if (ret) { | |
153 | perror("Error in pthread mutex unlock"); | |
154 | exit(-1); | |
155 | } | |
156 | } | |
157 | ||
de10a585 MD |
158 | void *thr_reader(void *_count) |
159 | { | |
160 | unsigned long long *count = _count; | |
bcc74df3 | 161 | int *local_ptr; |
de10a585 | 162 | |
94df6318 MD |
163 | printf_verbose("thread_begin %s, tid %lu\n", |
164 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
165 | |
166 | set_affinity(); | |
167 | ||
168 | rcu_register_thread(); | |
169 | ||
882f3357 MD |
170 | assert(rcu_read_ongoing()); |
171 | rcu_thread_offline(); | |
172 | assert(!rcu_read_ongoing()); | |
173 | rcu_thread_online(); | |
174 | ||
de10a585 MD |
175 | while (!test_go) |
176 | { | |
177 | } | |
178 | cmm_smp_mb(); | |
179 | ||
180 | for (;;) { | |
181 | rcu_read_lock(); | |
882f3357 | 182 | assert(rcu_read_ongoing()); |
de10a585 | 183 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 184 | rcu_debug_yield_read(); |
de10a585 | 185 | if (local_ptr) |
bcc74df3 | 186 | assert(*local_ptr == 8); |
a0b7f7ea | 187 | if (caa_unlikely(rduration)) |
de10a585 MD |
188 | loop_sleep(rduration); |
189 | rcu_read_unlock(); | |
bd252a04 | 190 | URCU_TLS(nr_reads)++; |
de10a585 | 191 | /* QS each 1024 reads */ |
bd252a04 | 192 | if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0)) |
de10a585 | 193 | rcu_quiescent_state(); |
a0b7f7ea | 194 | if (caa_unlikely(!test_duration_read())) |
de10a585 MD |
195 | break; |
196 | } | |
197 | ||
198 | rcu_unregister_thread(); | |
199 | ||
200 | /* test extra thread registration */ | |
201 | rcu_register_thread(); | |
202 | rcu_unregister_thread(); | |
203 | ||
bd252a04 | 204 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
205 | printf_verbose("thread_end %s, tid %lu\n", |
206 | "reader", urcu_get_thread_id()); | |
de10a585 MD |
207 | return ((void*)1); |
208 | ||
209 | } | |
210 | ||
211 | void *thr_writer(void *_count) | |
212 | { | |
213 | unsigned long long *count = _count; | |
bcc74df3 | 214 | int *new, *old; |
de10a585 | 215 | |
94df6318 MD |
216 | printf_verbose("thread_begin %s, tid %lu\n", |
217 | "writer", urcu_get_thread_id()); | |
de10a585 MD |
218 | |
219 | set_affinity(); | |
220 | ||
221 | while (!test_go) | |
222 | { | |
223 | } | |
224 | cmm_smp_mb(); | |
225 | ||
226 | for (;;) { | |
bcc74df3 MD |
227 | new = malloc(sizeof(int)); |
228 | assert(new); | |
229 | *new = 8; | |
de10a585 | 230 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 231 | if (caa_unlikely(wduration)) |
de10a585 MD |
232 | loop_sleep(wduration); |
233 | synchronize_rcu(); | |
de10a585 | 234 | if (old) |
bcc74df3 MD |
235 | *old = 0; |
236 | free(old); | |
bd252a04 | 237 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 238 | if (caa_unlikely(!test_duration_write())) |
de10a585 | 239 | break; |
a0b7f7ea | 240 | if (caa_unlikely(wdelay)) |
de10a585 MD |
241 | loop_sleep(wdelay); |
242 | } | |
243 | ||
94df6318 MD |
244 | printf_verbose("thread_end %s, tid %lu\n", |
245 | "writer", urcu_get_thread_id()); | |
bd252a04 | 246 | *count = URCU_TLS(nr_writes); |
de10a585 MD |
247 | return ((void*)2); |
248 | } | |
249 | ||
250 | void show_usage(int argc, char **argv) | |
251 | { | |
06637138 MD |
252 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
253 | argv[0]); | |
254 | printf("OPTIONS:\n"); | |
06637138 | 255 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
06637138 MD |
256 | printf(" [-d delay] (writer period (us))\n"); |
257 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
258 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
259 | printf(" [-v] (verbose output)\n"); | |
260 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
de10a585 MD |
261 | printf("\n"); |
262 | } | |
263 | ||
264 | int main(int argc, char **argv) | |
265 | { | |
266 | int err; | |
267 | pthread_t *tid_reader, *tid_writer; | |
268 | void *tret; | |
269 | unsigned long long *count_reader, *count_writer; | |
270 | unsigned long long tot_reads = 0, tot_writes = 0; | |
271 | int i, a; | |
272 | ||
273 | if (argc < 4) { | |
274 | show_usage(argc, argv); | |
275 | return -1; | |
276 | } | |
277 | ||
278 | err = sscanf(argv[1], "%u", &nr_readers); | |
279 | if (err != 1) { | |
280 | show_usage(argc, argv); | |
281 | return -1; | |
282 | } | |
283 | ||
284 | err = sscanf(argv[2], "%u", &nr_writers); | |
285 | if (err != 1) { | |
286 | show_usage(argc, argv); | |
287 | return -1; | |
288 | } | |
289 | ||
290 | err = sscanf(argv[3], "%lu", &duration); | |
291 | if (err != 1) { | |
292 | show_usage(argc, argv); | |
293 | return -1; | |
294 | } | |
295 | ||
296 | for (i = 4; i < argc; i++) { | |
297 | if (argv[i][0] != '-') | |
298 | continue; | |
299 | switch (argv[i][1]) { | |
de10a585 | 300 | case 'r': |
2650042a | 301 | rcu_debug_yield_enable(RCU_YIELD_READ); |
de10a585 MD |
302 | break; |
303 | case 'w': | |
2650042a | 304 | rcu_debug_yield_enable(RCU_YIELD_WRITE); |
de10a585 | 305 | break; |
de10a585 MD |
306 | case 'a': |
307 | if (argc < i + 2) { | |
308 | show_usage(argc, argv); | |
309 | return -1; | |
310 | } | |
311 | a = atoi(argv[++i]); | |
312 | cpu_affinities[next_aff++] = a; | |
313 | use_affinity = 1; | |
314 | printf_verbose("Adding CPU %d affinity\n", a); | |
315 | break; | |
316 | case 'c': | |
317 | if (argc < i + 2) { | |
318 | show_usage(argc, argv); | |
319 | return -1; | |
320 | } | |
321 | rduration = atol(argv[++i]); | |
322 | break; | |
323 | case 'd': | |
324 | if (argc < i + 2) { | |
325 | show_usage(argc, argv); | |
326 | return -1; | |
327 | } | |
328 | wdelay = atol(argv[++i]); | |
329 | break; | |
330 | case 'e': | |
331 | if (argc < i + 2) { | |
332 | show_usage(argc, argv); | |
333 | return -1; | |
334 | } | |
335 | wduration = atol(argv[++i]); | |
336 | break; | |
337 | case 'v': | |
338 | verbose_mode = 1; | |
339 | break; | |
340 | } | |
341 | } | |
342 | ||
343 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
344 | duration, nr_readers, nr_writers); | |
345 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
346 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
347 | printf_verbose("thread %-6s, tid %lu\n", |
348 | "main", urcu_get_thread_id()); | |
de10a585 | 349 | |
9aa14175 MD |
350 | tid_reader = calloc(nr_readers, sizeof(*tid_reader)); |
351 | tid_writer = calloc(nr_writers, sizeof(*tid_writer)); | |
352 | count_reader = calloc(nr_readers, sizeof(*count_reader)); | |
353 | count_writer = calloc(nr_writers, sizeof(*count_writer)); | |
de10a585 MD |
354 | |
355 | next_aff = 0; | |
356 | ||
357 | for (i = 0; i < nr_readers; i++) { | |
358 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
359 | &count_reader[i]); | |
360 | if (err != 0) | |
361 | exit(1); | |
362 | } | |
363 | for (i = 0; i < nr_writers; i++) { | |
364 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
365 | &count_writer[i]); | |
366 | if (err != 0) | |
367 | exit(1); | |
368 | } | |
369 | ||
370 | cmm_smp_mb(); | |
371 | ||
372 | test_go = 1; | |
373 | ||
374 | sleep(duration); | |
375 | ||
376 | test_stop = 1; | |
377 | ||
378 | for (i = 0; i < nr_readers; i++) { | |
379 | err = pthread_join(tid_reader[i], &tret); | |
380 | if (err != 0) | |
381 | exit(1); | |
382 | tot_reads += count_reader[i]; | |
383 | } | |
384 | for (i = 0; i < nr_writers; i++) { | |
385 | err = pthread_join(tid_writer[i], &tret); | |
386 | if (err != 0) | |
387 | exit(1); | |
388 | tot_writes += count_writer[i]; | |
389 | } | |
390 | ||
391 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
392 | tot_writes); | |
393 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " | |
394 | "nr_writers %3u " | |
395 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
396 | argv[0], duration, nr_readers, rduration, wduration, | |
397 | nr_writers, wdelay, tot_reads, tot_writes, | |
398 | tot_reads + tot_writes); | |
bcc74df3 | 399 | free(test_rcu_pointer); |
de10a585 MD |
400 | free(tid_reader); |
401 | free(tid_writer); | |
402 | free(count_reader); | |
403 | free(count_writer); | |
404 | return 0; | |
405 | } |