5670d1e9f9355271b1b8a66f5e0373328d175049
[urcu.git] / tests / benchmark / test_urcu.c
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 #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>
32 #include <errno.h>
33
34 #include <urcu/arch.h>
35 #include <urcu/tls-compat.h>
36 #include "cpuset.h"
37 #include "thread-id.h"
38 #include <../common/debug-yield.h>
39
40 /* hardcoded number of CPUs */
41 #define NR_CPUS 16384
42
43 #ifndef DYNAMIC_LINK_TEST
44 #define _LGPL_SOURCE
45 #endif
46 #include <urcu.h>
47
48 static volatile int test_go, test_stop;
49
50 static unsigned long wdelay;
51
52 static int *test_rcu_pointer;
53
54 static unsigned long duration;
55
56 /* read-side C.S. duration, in loops */
57 static unsigned long rduration;
58
59 /* write-side C.S. duration, in loops */
60 static unsigned long wduration;
61
62 static inline void loop_sleep(unsigned long loops)
63 {
64 while (loops-- != 0)
65 caa_cpu_relax();
66 }
67
68 static int verbose_mode;
69
70 #define printf_verbose(fmt, args...) \
71 do { \
72 if (verbose_mode) \
73 printf(fmt, args); \
74 } while (0)
75
76 static unsigned int cpu_affinities[NR_CPUS];
77 static unsigned int next_aff = 0;
78 static int use_affinity = 0;
79
80 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
81
82 static void set_affinity(void)
83 {
84 #if HAVE_SCHED_SETAFFINITY
85 cpu_set_t mask;
86 int cpu, ret;
87 #endif /* HAVE_SCHED_SETAFFINITY */
88
89 if (!use_affinity)
90 return;
91
92 #if HAVE_SCHED_SETAFFINITY
93 ret = pthread_mutex_lock(&affinity_mutex);
94 if (ret) {
95 perror("Error in pthread mutex lock");
96 exit(-1);
97 }
98 cpu = cpu_affinities[next_aff++];
99 ret = pthread_mutex_unlock(&affinity_mutex);
100 if (ret) {
101 perror("Error in pthread mutex unlock");
102 exit(-1);
103 }
104
105 CPU_ZERO(&mask);
106 CPU_SET(cpu, &mask);
107 #if SCHED_SETAFFINITY_ARGS == 2
108 sched_setaffinity(0, &mask);
109 #else
110 sched_setaffinity(0, sizeof(mask), &mask);
111 #endif
112 #endif /* HAVE_SCHED_SETAFFINITY */
113 }
114
115 /*
116 * returns 0 if test should end.
117 */
118 static int test_duration_write(void)
119 {
120 return !test_stop;
121 }
122
123 static int test_duration_read(void)
124 {
125 return !test_stop;
126 }
127
128 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
129 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
130
131 static unsigned int nr_readers;
132 static unsigned int nr_writers;
133
134 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
135
136 void rcu_copy_mutex_lock(void)
137 {
138 int ret;
139 ret = pthread_mutex_lock(&rcu_copy_mutex);
140 if (ret) {
141 perror("Error in pthread mutex lock");
142 exit(-1);
143 }
144 }
145
146 void rcu_copy_mutex_unlock(void)
147 {
148 int ret;
149
150 ret = pthread_mutex_unlock(&rcu_copy_mutex);
151 if (ret) {
152 perror("Error in pthread mutex unlock");
153 exit(-1);
154 }
155 }
156
157 void *thr_reader(void *_count)
158 {
159 unsigned long long *count = _count;
160 int *local_ptr;
161
162 printf_verbose("thread_begin %s, tid %lu\n",
163 "reader", urcu_get_thread_id());
164
165 set_affinity();
166
167 rcu_register_thread();
168 assert(!rcu_read_ongoing());
169
170 while (!test_go)
171 {
172 }
173 cmm_smp_mb();
174
175 for (;;) {
176 rcu_read_lock();
177 assert(rcu_read_ongoing());
178 local_ptr = rcu_dereference(test_rcu_pointer);
179 rcu_debug_yield_read();
180 if (local_ptr)
181 assert(*local_ptr == 8);
182 if (caa_unlikely(rduration))
183 loop_sleep(rduration);
184 rcu_read_unlock();
185 URCU_TLS(nr_reads)++;
186 if (caa_unlikely(!test_duration_read()))
187 break;
188 }
189
190 rcu_unregister_thread();
191
192 /* test extra thread registration */
193 rcu_register_thread();
194 rcu_unregister_thread();
195
196 *count = URCU_TLS(nr_reads);
197 printf_verbose("thread_end %s, tid %lu\n",
198 "reader", urcu_get_thread_id());
199 return ((void*)1);
200
201 }
202
203 void *thr_writer(void *_count)
204 {
205 unsigned long long *count = _count;
206 int *new, *old;
207
208 printf_verbose("thread_begin %s, tid %lu\n",
209 "writer", urcu_get_thread_id());
210
211 set_affinity();
212
213 while (!test_go)
214 {
215 }
216 cmm_smp_mb();
217
218 for (;;) {
219 new = malloc(sizeof(int));
220 assert(new);
221 *new = 8;
222 old = rcu_xchg_pointer(&test_rcu_pointer, new);
223 if (caa_unlikely(wduration))
224 loop_sleep(wduration);
225 synchronize_rcu();
226 if (old)
227 *old = 0;
228 free(old);
229 URCU_TLS(nr_writes)++;
230 if (caa_unlikely(!test_duration_write()))
231 break;
232 if (caa_unlikely(wdelay))
233 loop_sleep(wdelay);
234 }
235
236 printf_verbose("thread_end %s, tid %lu\n",
237 "writer", urcu_get_thread_id());
238 *count = URCU_TLS(nr_writes);
239 return ((void*)2);
240 }
241
242 void show_usage(int argc, char **argv)
243 {
244 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
245 argv[0]);
246 printf("OPTIONS:\n");
247 printf(" [-r] [-w] (yield reader and/or writer)\n");
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");
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 case 'r':
293 rcu_debug_yield_enable(RCU_YIELD_READ);
294 break;
295 case 'w':
296 rcu_debug_yield_enable(RCU_YIELD_WRITE);
297 break;
298 case 'a':
299 if (argc < i + 2) {
300 show_usage(argc, argv);
301 return -1;
302 }
303 a = atoi(argv[++i]);
304 cpu_affinities[next_aff++] = a;
305 use_affinity = 1;
306 printf_verbose("Adding CPU %d affinity\n", a);
307 break;
308 case 'c':
309 if (argc < i + 2) {
310 show_usage(argc, argv);
311 return -1;
312 }
313 rduration = atol(argv[++i]);
314 break;
315 case 'd':
316 if (argc < i + 2) {
317 show_usage(argc, argv);
318 return -1;
319 }
320 wdelay = atol(argv[++i]);
321 break;
322 case 'e':
323 if (argc < i + 2) {
324 show_usage(argc, argv);
325 return -1;
326 }
327 wduration = atol(argv[++i]);
328 break;
329 case 'v':
330 verbose_mode = 1;
331 break;
332 }
333 }
334
335 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
336 duration, nr_readers, nr_writers);
337 printf_verbose("Writer delay : %lu loops.\n", wdelay);
338 printf_verbose("Reader duration : %lu loops.\n", rduration);
339 printf_verbose("thread %-6s, tid %lu\n",
340 "main", urcu_get_thread_id());
341
342 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
343 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
344 count_reader = calloc(nr_readers, sizeof(*count_reader));
345 count_writer = calloc(nr_writers, sizeof(*count_writer));
346
347 next_aff = 0;
348
349 for (i = 0; i < nr_readers; i++) {
350 err = pthread_create(&tid_reader[i], NULL, thr_reader,
351 &count_reader[i]);
352 if (err != 0)
353 exit(1);
354 }
355 for (i = 0; i < nr_writers; i++) {
356 err = pthread_create(&tid_writer[i], NULL, thr_writer,
357 &count_writer[i]);
358 if (err != 0)
359 exit(1);
360 }
361
362 cmm_smp_mb();
363
364 test_go = 1;
365
366 sleep(duration);
367
368 test_stop = 1;
369
370 for (i = 0; i < nr_readers; i++) {
371 err = pthread_join(tid_reader[i], &tret);
372 if (err != 0)
373 exit(1);
374 tot_reads += count_reader[i];
375 }
376 for (i = 0; i < nr_writers; i++) {
377 err = pthread_join(tid_writer[i], &tret);
378 if (err != 0)
379 exit(1);
380 tot_writes += count_writer[i];
381 }
382
383 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
384 tot_writes);
385 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
386 "nr_writers %3u "
387 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
388 argv[0], duration, nr_readers, rduration, wduration,
389 nr_writers, wdelay, tot_reads, tot_writes,
390 tot_reads + tot_writes);
391 free(test_rcu_pointer);
392 free(tid_reader);
393 free(tid_writer);
394 free(count_reader);
395 free(count_writer);
396 return 0;
397 }
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