Commit | Line | Data |
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fdee2e6d 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> |
fdee2e6d 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 | #define _GNU_SOURCE | |
d8540fc5 | 24 | #include "../config.h" |
fdee2e6d 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> |
fdee2e6d MD |
35 | |
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 | |
fdee2e6d MD |
41 | /* hardcoded number of CPUs */ |
42 | #define NR_CPUS 16384 | |
43 | ||
fdee2e6d MD |
44 | #ifndef DYNAMIC_LINK_TEST |
45 | #define _LGPL_SOURCE | |
46 | #else | |
1de4df4b | 47 | #define rcu_debug_yield_read() |
fdee2e6d MD |
48 | #endif |
49 | #include <urcu-bp.h> | |
50 | ||
fdee2e6d MD |
51 | static volatile int test_go, test_stop; |
52 | ||
53 | static unsigned long wdelay; | |
54 | ||
bcc74df3 | 55 | static int *test_rcu_pointer; |
fdee2e6d MD |
56 | |
57 | static unsigned long duration; | |
58 | ||
59 | /* read-side C.S. duration, in loops */ | |
60 | static unsigned long rduration; | |
61 | ||
31b598e0 MD |
62 | /* write-side C.S. duration, in loops */ |
63 | static unsigned long wduration; | |
64 | ||
ab0aacbe | 65 | static inline void loop_sleep(unsigned long loops) |
fdee2e6d | 66 | { |
ab0aacbe | 67 | while (loops-- != 0) |
06f22bdb | 68 | caa_cpu_relax(); |
fdee2e6d MD |
69 | } |
70 | ||
71 | static int verbose_mode; | |
72 | ||
73 | #define printf_verbose(fmt, args...) \ | |
74 | do { \ | |
75 | if (verbose_mode) \ | |
76 | printf(fmt, args); \ | |
77 | } while (0) | |
78 | ||
79 | static unsigned int cpu_affinities[NR_CPUS]; | |
80 | static unsigned int next_aff = 0; | |
81 | static int use_affinity = 0; | |
82 | ||
83 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; | |
84 | ||
85 | static void set_affinity(void) | |
86 | { | |
95bc7fb9 | 87 | #if HAVE_SCHED_SETAFFINITY |
fdee2e6d | 88 | cpu_set_t mask; |
95bc7fb9 MD |
89 | int cpu, ret; |
90 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
91 | |
92 | if (!use_affinity) | |
93 | return; | |
94 | ||
d8540fc5 | 95 | #if HAVE_SCHED_SETAFFINITY |
fdee2e6d MD |
96 | ret = pthread_mutex_lock(&affinity_mutex); |
97 | if (ret) { | |
98 | perror("Error in pthread mutex lock"); | |
99 | exit(-1); | |
100 | } | |
101 | cpu = cpu_affinities[next_aff++]; | |
102 | ret = pthread_mutex_unlock(&affinity_mutex); | |
103 | if (ret) { | |
104 | perror("Error in pthread mutex unlock"); | |
105 | exit(-1); | |
106 | } | |
d8540fc5 | 107 | |
fdee2e6d MD |
108 | CPU_ZERO(&mask); |
109 | CPU_SET(cpu, &mask); | |
d8540fc5 PA |
110 | #if SCHED_SETAFFINITY_ARGS == 2 |
111 | sched_setaffinity(0, &mask); | |
112 | #else | |
fdee2e6d | 113 | sched_setaffinity(0, sizeof(mask), &mask); |
d8540fc5 PA |
114 | #endif |
115 | #endif /* HAVE_SCHED_SETAFFINITY */ | |
fdee2e6d MD |
116 | } |
117 | ||
118 | /* | |
119 | * returns 0 if test should end. | |
120 | */ | |
121 | static int test_duration_write(void) | |
122 | { | |
123 | return !test_stop; | |
124 | } | |
125 | ||
126 | static int test_duration_read(void) | |
127 | { | |
128 | return !test_stop; | |
129 | } | |
130 | ||
bd252a04 MD |
131 | static DEFINE_URCU_TLS(unsigned long long, nr_writes); |
132 | static DEFINE_URCU_TLS(unsigned long long, nr_reads); | |
fdee2e6d MD |
133 | |
134 | static unsigned int nr_readers; | |
135 | static unsigned int nr_writers; | |
136 | ||
137 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; | |
138 | ||
139 | void rcu_copy_mutex_lock(void) | |
140 | { | |
141 | int ret; | |
142 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
143 | if (ret) { | |
144 | perror("Error in pthread mutex lock"); | |
145 | exit(-1); | |
146 | } | |
147 | } | |
148 | ||
149 | void rcu_copy_mutex_unlock(void) | |
150 | { | |
151 | int ret; | |
152 | ||
153 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
154 | if (ret) { | |
155 | perror("Error in pthread mutex unlock"); | |
156 | exit(-1); | |
157 | } | |
158 | } | |
159 | ||
fdee2e6d MD |
160 | void *thr_reader(void *_count) |
161 | { | |
162 | unsigned long long *count = _count; | |
bcc74df3 | 163 | int *local_ptr; |
fdee2e6d | 164 | |
94df6318 MD |
165 | printf_verbose("thread_begin %s, tid %lu\n", |
166 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
167 | |
168 | set_affinity(); | |
169 | ||
170 | rcu_register_thread(); | |
882f3357 | 171 | assert(!rcu_read_ongoing()); |
fdee2e6d MD |
172 | |
173 | while (!test_go) | |
174 | { | |
175 | } | |
5481ddb3 | 176 | cmm_smp_mb(); |
fdee2e6d MD |
177 | |
178 | for (;;) { | |
179 | rcu_read_lock(); | |
882f3357 | 180 | assert(rcu_read_ongoing()); |
fdee2e6d | 181 | local_ptr = rcu_dereference(test_rcu_pointer); |
1de4df4b | 182 | rcu_debug_yield_read(); |
fdee2e6d | 183 | if (local_ptr) |
bcc74df3 | 184 | assert(*local_ptr == 8); |
a0b7f7ea | 185 | if (caa_unlikely(rduration)) |
fdee2e6d MD |
186 | loop_sleep(rduration); |
187 | rcu_read_unlock(); | |
bd252a04 | 188 | URCU_TLS(nr_reads)++; |
a0b7f7ea | 189 | if (caa_unlikely(!test_duration_read())) |
fdee2e6d MD |
190 | break; |
191 | } | |
192 | ||
193 | rcu_unregister_thread(); | |
194 | ||
bd252a04 | 195 | *count = URCU_TLS(nr_reads); |
94df6318 MD |
196 | printf_verbose("thread_end %s, tid %lu\n", |
197 | "reader", urcu_get_thread_id()); | |
fdee2e6d MD |
198 | return ((void*)1); |
199 | ||
200 | } | |
201 | ||
202 | void *thr_writer(void *_count) | |
203 | { | |
204 | unsigned long long *count = _count; | |
bcc74df3 | 205 | int *new, *old; |
fdee2e6d | 206 | |
94df6318 MD |
207 | printf_verbose("thread_begin %s, tid %lu\n", |
208 | "writer", urcu_get_thread_id()); | |
fdee2e6d MD |
209 | |
210 | set_affinity(); | |
211 | ||
212 | while (!test_go) | |
213 | { | |
214 | } | |
5481ddb3 | 215 | cmm_smp_mb(); |
fdee2e6d MD |
216 | |
217 | for (;;) { | |
bcc74df3 MD |
218 | new = malloc(sizeof(int)); |
219 | *new = 8; | |
d2835e6f | 220 | old = rcu_xchg_pointer(&test_rcu_pointer, new); |
a0b7f7ea | 221 | if (caa_unlikely(wduration)) |
31b598e0 | 222 | loop_sleep(wduration); |
d2835e6f | 223 | synchronize_rcu(); |
fdee2e6d | 224 | if (old) |
bcc74df3 MD |
225 | *old = 0; |
226 | free(old); | |
bd252a04 | 227 | URCU_TLS(nr_writes)++; |
a0b7f7ea | 228 | if (caa_unlikely(!test_duration_write())) |
fdee2e6d | 229 | break; |
a0b7f7ea | 230 | if (caa_unlikely(wdelay)) |
fdee2e6d MD |
231 | loop_sleep(wdelay); |
232 | } | |
233 | ||
94df6318 MD |
234 | printf_verbose("thread_end %s, tid %lu\n", |
235 | "writer", urcu_get_thread_id()); | |
bd252a04 | 236 | *count = URCU_TLS(nr_writes); |
fdee2e6d MD |
237 | return ((void*)2); |
238 | } | |
239 | ||
240 | void show_usage(int argc, char **argv) | |
241 | { | |
06637138 MD |
242 | printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n", |
243 | argv[0]); | |
244 | printf("OPTIONS:\n"); | |
fdee2e6d | 245 | #ifdef DEBUG_YIELD |
06637138 | 246 | printf(" [-r] [-w] (yield reader and/or writer)\n"); |
fdee2e6d | 247 | #endif |
06637138 MD |
248 | printf(" [-d delay] (writer period (us))\n"); |
249 | printf(" [-c duration] (reader C.S. duration (in loops))\n"); | |
250 | printf(" [-e duration] (writer C.S. duration (in loops))\n"); | |
251 | printf(" [-v] (verbose output)\n"); | |
252 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); | |
fdee2e6d MD |
253 | printf("\n"); |
254 | } | |
255 | ||
256 | int main(int argc, char **argv) | |
257 | { | |
258 | int err; | |
259 | pthread_t *tid_reader, *tid_writer; | |
260 | void *tret; | |
261 | unsigned long long *count_reader, *count_writer; | |
262 | unsigned long long tot_reads = 0, tot_writes = 0; | |
263 | int i, a; | |
264 | ||
265 | if (argc < 4) { | |
266 | show_usage(argc, argv); | |
267 | return -1; | |
268 | } | |
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]) { | |
292 | #ifdef DEBUG_YIELD | |
293 | case 'r': | |
1de4df4b | 294 | rcu_yield_active |= RCU_YIELD_READ; |
fdee2e6d MD |
295 | break; |
296 | case 'w': | |
1de4df4b | 297 | rcu_yield_active |= RCU_YIELD_WRITE; |
fdee2e6d MD |
298 | break; |
299 | #endif | |
300 | case 'a': | |
301 | if (argc < i + 2) { | |
302 | show_usage(argc, argv); | |
303 | return -1; | |
304 | } | |
305 | a = atoi(argv[++i]); | |
306 | cpu_affinities[next_aff++] = a; | |
307 | use_affinity = 1; | |
308 | printf_verbose("Adding CPU %d affinity\n", a); | |
309 | break; | |
310 | case 'c': | |
311 | if (argc < i + 2) { | |
312 | show_usage(argc, argv); | |
313 | return -1; | |
314 | } | |
315 | rduration = atol(argv[++i]); | |
316 | break; | |
317 | case 'd': | |
318 | if (argc < i + 2) { | |
319 | show_usage(argc, argv); | |
320 | return -1; | |
321 | } | |
322 | wdelay = atol(argv[++i]); | |
323 | break; | |
31b598e0 MD |
324 | case 'e': |
325 | if (argc < i + 2) { | |
326 | show_usage(argc, argv); | |
327 | return -1; | |
328 | } | |
329 | wduration = atol(argv[++i]); | |
330 | break; | |
fdee2e6d MD |
331 | case 'v': |
332 | verbose_mode = 1; | |
333 | break; | |
334 | } | |
335 | } | |
336 | ||
337 | printf_verbose("running test for %lu seconds, %u readers, %u writers.\n", | |
338 | duration, nr_readers, nr_writers); | |
339 | printf_verbose("Writer delay : %lu loops.\n", wdelay); | |
340 | printf_verbose("Reader duration : %lu loops.\n", rduration); | |
94df6318 MD |
341 | printf_verbose("thread %-6s, tid %lu\n", |
342 | "main", urcu_get_thread_id()); | |
fdee2e6d | 343 | |
fdee2e6d MD |
344 | tid_reader = malloc(sizeof(*tid_reader) * nr_readers); |
345 | tid_writer = malloc(sizeof(*tid_writer) * nr_writers); | |
346 | count_reader = malloc(sizeof(*count_reader) * nr_readers); | |
347 | count_writer = malloc(sizeof(*count_writer) * nr_writers); | |
348 | ||
349 | next_aff = 0; | |
350 | ||
351 | for (i = 0; i < nr_readers; i++) { | |
352 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
353 | &count_reader[i]); | |
354 | if (err != 0) | |
355 | exit(1); | |
356 | } | |
357 | for (i = 0; i < nr_writers; i++) { | |
358 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
359 | &count_writer[i]); | |
360 | if (err != 0) | |
361 | exit(1); | |
362 | } | |
363 | ||
5481ddb3 | 364 | cmm_smp_mb(); |
fdee2e6d MD |
365 | |
366 | test_go = 1; | |
367 | ||
368 | sleep(duration); | |
369 | ||
370 | test_stop = 1; | |
371 | ||
372 | for (i = 0; i < nr_readers; i++) { | |
373 | err = pthread_join(tid_reader[i], &tret); | |
374 | if (err != 0) | |
375 | exit(1); | |
376 | tot_reads += count_reader[i]; | |
377 | } | |
378 | for (i = 0; i < nr_writers; i++) { | |
379 | err = pthread_join(tid_writer[i], &tret); | |
380 | if (err != 0) | |
381 | exit(1); | |
382 | tot_writes += count_writer[i]; | |
383 | } | |
384 | ||
385 | printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads, | |
386 | tot_writes); | |
a50a7b43 | 387 | printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu " |
fdee2e6d MD |
388 | "nr_writers %3u " |
389 | "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n", | |
a50a7b43 | 390 | argv[0], duration, nr_readers, rduration, wduration, |
fdee2e6d MD |
391 | nr_writers, wdelay, tot_reads, tot_writes, |
392 | tot_reads + tot_writes); | |
bcc74df3 | 393 | free(test_rcu_pointer); |
fdee2e6d MD |
394 | free(tid_reader); |
395 | free(tid_writer); | |
396 | free(count_reader); | |
397 | free(count_writer); | |
398 | return 0; | |
399 | } |