97eadab0014a00466b1c744aacd9a241efeebd78
[urcu.git] / tests / benchmark / test_urcu_defer.c
1 /*
2 * test_urcu_defer.c
3 *
4 * Userspace RCU library - test program (with automatic reclamation)
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 "thread-id.h"
37 #include "../common/debug-yield.h"
38
39 /* hardcoded number of CPUs */
40 #define NR_CPUS 16384
41
42 #ifndef DYNAMIC_LINK_TEST
43 #define _LGPL_SOURCE
44 #endif
45 #include <urcu.h>
46 #include <urcu-defer.h>
47
48 struct test_array {
49 int a;
50 };
51
52 static volatile int test_go, test_stop;
53
54 static unsigned long wdelay;
55
56 static struct test_array *test_rcu_pointer;
57
58 static unsigned long duration;
59
60 /* read-side C.S. duration, in loops */
61 static unsigned long rduration;
62
63 /* write-side C.S. duration, in loops */
64 static unsigned long wduration;
65
66 static inline void loop_sleep(unsigned long loops)
67 {
68 while (loops-- != 0)
69 caa_cpu_relax();
70 }
71
72 static int verbose_mode;
73
74 #define printf_verbose(fmt, args...) \
75 do { \
76 if (verbose_mode) \
77 printf(fmt, args); \
78 } while (0)
79
80 static unsigned int cpu_affinities[NR_CPUS];
81 static unsigned int next_aff = 0;
82 static int use_affinity = 0;
83
84 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
85
86 static void set_affinity(void)
87 {
88 #if HAVE_SCHED_SETAFFINITY
89 cpu_set_t mask;
90 int cpu, ret;
91 #endif /* HAVE_SCHED_SETAFFINITY */
92
93 if (!use_affinity)
94 return;
95
96 #if HAVE_SCHED_SETAFFINITY
97 ret = pthread_mutex_lock(&affinity_mutex);
98 if (ret) {
99 perror("Error in pthread mutex lock");
100 exit(-1);
101 }
102 cpu = cpu_affinities[next_aff++];
103 ret = pthread_mutex_unlock(&affinity_mutex);
104 if (ret) {
105 perror("Error in pthread mutex unlock");
106 exit(-1);
107 }
108
109 CPU_ZERO(&mask);
110 CPU_SET(cpu, &mask);
111 sched_setaffinity(0, sizeof(mask), &mask);
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
132 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
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
160 void *thr_reader(void *_count)
161 {
162 unsigned long long *count = _count;
163 struct test_array *local_ptr;
164
165 printf_verbose("thread_begin %s, tid %lu\n",
166 "reader", urcu_get_thread_id());
167
168 set_affinity();
169
170 rcu_register_thread();
171
172 while (!test_go)
173 {
174 }
175 cmm_smp_mb();
176
177 for (;;) {
178 rcu_read_lock();
179 local_ptr = rcu_dereference(test_rcu_pointer);
180 rcu_debug_yield_read();
181 if (local_ptr)
182 assert(local_ptr->a == 8);
183 if (caa_unlikely(rduration))
184 loop_sleep(rduration);
185 rcu_read_unlock();
186 URCU_TLS(nr_reads)++;
187 if (caa_unlikely(!test_duration_read()))
188 break;
189 }
190
191 rcu_unregister_thread();
192
193 *count = URCU_TLS(nr_reads);
194 printf_verbose("thread_end %s, tid %lu\n",
195 "reader", urcu_get_thread_id());
196 return ((void*)1);
197
198 }
199
200 static void test_cb2(void *data)
201 {
202 }
203
204 static void test_cb1(void *data)
205 {
206 }
207
208 void *thr_writer(void *data)
209 {
210 unsigned long wtidx = (unsigned long)data;
211 struct test_array *new, *old = NULL;
212 int ret;
213
214 printf_verbose("thread_begin %s, tid %lu\n",
215 "writer", urcu_get_thread_id());
216
217 set_affinity();
218
219 ret = rcu_defer_register_thread();
220 if (ret) {
221 printf("Error in rcu_defer_register_thread\n");
222 exit(-1);
223 }
224
225 while (!test_go)
226 {
227 }
228 cmm_smp_mb();
229
230 for (;;) {
231 new = malloc(sizeof(*new));
232 new->a = 8;
233 old = rcu_xchg_pointer(&test_rcu_pointer, new);
234 if (caa_unlikely(wduration))
235 loop_sleep(wduration);
236 defer_rcu(free, old);
237 defer_rcu(test_cb1, old);
238 defer_rcu(test_cb1, (void *)-2L);
239 defer_rcu(test_cb1, (void *)-2L);
240 defer_rcu(test_cb1, old);
241 defer_rcu(test_cb2, (void *)-2L);
242 defer_rcu(test_cb2, (void *)-4L);
243 defer_rcu(test_cb2, (void *)-2L);
244 URCU_TLS(nr_writes)++;
245 if (caa_unlikely(!test_duration_write()))
246 break;
247 if (caa_unlikely(wdelay))
248 loop_sleep(wdelay);
249 }
250
251 rcu_defer_unregister_thread();
252
253 printf_verbose("thread_end %s, tid %lu\n",
254 "writer", urcu_get_thread_id());
255 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
256 return ((void*)2);
257 }
258
259 void show_usage(int argc, char **argv)
260 {
261 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
262 argv[0]);
263 printf("OPTIONS:\n");
264 printf(" [-r] [-w] (yield reader and/or writer)\n");
265 printf(" [-d delay] (writer period (us))\n");
266 printf(" [-c duration] (reader C.S. duration (in loops))\n");
267 printf(" [-e duration] (writer C.S. duration (in loops))\n");
268 printf(" [-v] (verbose output)\n");
269 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
270 printf("\n");
271 }
272
273 int main(int argc, char **argv)
274 {
275 int err;
276 pthread_t *tid_reader, *tid_writer;
277 void *tret;
278 unsigned long long *count_reader;
279 unsigned long long tot_reads = 0, tot_writes = 0;
280 int i, a;
281 unsigned int i_thr;
282
283 if (argc < 4) {
284 show_usage(argc, argv);
285 return -1;
286 }
287
288 err = sscanf(argv[1], "%u", &nr_readers);
289 if (err != 1) {
290 show_usage(argc, argv);
291 return -1;
292 }
293
294 err = sscanf(argv[2], "%u", &nr_writers);
295 if (err != 1) {
296 show_usage(argc, argv);
297 return -1;
298 }
299
300 err = sscanf(argv[3], "%lu", &duration);
301 if (err != 1) {
302 show_usage(argc, argv);
303 return -1;
304 }
305
306 for (i = 4; i < argc; i++) {
307 if (argv[i][0] != '-')
308 continue;
309 switch (argv[i][1]) {
310 case 'r':
311 rcu_debug_yield_enable(RCU_YIELD_READ);
312 break;
313 case 'w':
314 rcu_debug_yield_enable(RCU_YIELD_WRITE);
315 break;
316 case 'a':
317 if (argc < i + 2) {
318 show_usage(argc, argv);
319 return -1;
320 }
321 a = atoi(argv[++i]);
322 cpu_affinities[next_aff++] = a;
323 use_affinity = 1;
324 printf_verbose("Adding CPU %d affinity\n", a);
325 break;
326 case 'c':
327 if (argc < i + 2) {
328 show_usage(argc, argv);
329 return -1;
330 }
331 rduration = atol(argv[++i]);
332 break;
333 case 'd':
334 if (argc < i + 2) {
335 show_usage(argc, argv);
336 return -1;
337 }
338 wdelay = atol(argv[++i]);
339 break;
340 case 'e':
341 if (argc < i + 2) {
342 show_usage(argc, argv);
343 return -1;
344 }
345 wduration = atol(argv[++i]);
346 break;
347 case 'v':
348 verbose_mode = 1;
349 break;
350 }
351 }
352
353 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
354 duration, nr_readers, nr_writers);
355 printf_verbose("Writer delay : %lu loops.\n", wdelay);
356 printf_verbose("Reader duration : %lu loops.\n", rduration);
357 printf_verbose("thread %-6s, tid %lu\n",
358 "main", urcu_get_thread_id());
359
360 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
361 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
362 count_reader = calloc(nr_readers, sizeof(*count_reader));
363 tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
364
365 next_aff = 0;
366
367 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
368 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
369 &count_reader[i_thr]);
370 if (err != 0)
371 exit(1);
372 }
373 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
374 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
375 (void *)(long)i_thr);
376 if (err != 0)
377 exit(1);
378 }
379
380 cmm_smp_mb();
381
382 test_go = 1;
383
384 sleep(duration);
385
386 test_stop = 1;
387
388 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
389 err = pthread_join(tid_reader[i_thr], &tret);
390 if (err != 0)
391 exit(1);
392 tot_reads += count_reader[i_thr];
393 }
394 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
395 err = pthread_join(tid_writer[i_thr], &tret);
396 if (err != 0)
397 exit(1);
398 tot_writes += tot_nr_writes[i_thr];
399 }
400
401 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
402 tot_writes);
403 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
404 "nr_writers %3u "
405 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
406 argv[0], duration, nr_readers, rduration, wduration,
407 nr_writers, wdelay, tot_reads, tot_writes,
408 tot_reads + tot_writes);
409 free(tid_reader);
410 free(tid_writer);
411 free(count_reader);
412 free(tot_nr_writes);
413
414 return 0;
415 }
This page took 0.056617 seconds and 3 git commands to generate.