cleanup: all functions have declarations (-Wmissing-prototypes)
[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 static
140 void *thr_reader(void *_count)
141 {
142 unsigned long long *count = _count;
143 struct test_array *local_ptr;
144
145 printf_verbose("thread_begin %s, tid %lu\n",
146 "reader", urcu_get_thread_id());
147
148 set_affinity();
149
150 rcu_register_thread();
151
152 while (!test_go)
153 {
154 }
155 cmm_smp_mb();
156
157 for (;;) {
158 rcu_read_lock();
159 local_ptr = rcu_dereference(test_rcu_pointer);
160 rcu_debug_yield_read();
161 if (local_ptr)
162 assert(local_ptr->a == 8);
163 if (caa_unlikely(rduration))
164 loop_sleep(rduration);
165 rcu_read_unlock();
166 URCU_TLS(nr_reads)++;
167 if (caa_unlikely(!test_duration_read()))
168 break;
169 }
170
171 rcu_unregister_thread();
172
173 *count = URCU_TLS(nr_reads);
174 printf_verbose("thread_end %s, tid %lu\n",
175 "reader", urcu_get_thread_id());
176 return ((void*)1);
177
178 }
179
180 static void test_cb2(void *data)
181 {
182 }
183
184 static void test_cb1(void *data)
185 {
186 }
187
188 static
189 void *thr_writer(void *data)
190 {
191 unsigned long wtidx = (unsigned long)data;
192 struct test_array *new, *old = NULL;
193 int ret;
194
195 printf_verbose("thread_begin %s, tid %lu\n",
196 "writer", urcu_get_thread_id());
197
198 set_affinity();
199
200 ret = rcu_defer_register_thread();
201 if (ret) {
202 printf("Error in rcu_defer_register_thread\n");
203 exit(-1);
204 }
205
206 while (!test_go)
207 {
208 }
209 cmm_smp_mb();
210
211 for (;;) {
212 new = malloc(sizeof(*new));
213 new->a = 8;
214 old = rcu_xchg_pointer(&test_rcu_pointer, new);
215 if (caa_unlikely(wduration))
216 loop_sleep(wduration);
217 defer_rcu(free, old);
218 defer_rcu(test_cb1, old);
219 defer_rcu(test_cb1, (void *)-2L);
220 defer_rcu(test_cb1, (void *)-2L);
221 defer_rcu(test_cb1, old);
222 defer_rcu(test_cb2, (void *)-2L);
223 defer_rcu(test_cb2, (void *)-4L);
224 defer_rcu(test_cb2, (void *)-2L);
225 URCU_TLS(nr_writes)++;
226 if (caa_unlikely(!test_duration_write()))
227 break;
228 if (caa_unlikely(wdelay))
229 loop_sleep(wdelay);
230 }
231
232 rcu_defer_unregister_thread();
233
234 printf_verbose("thread_end %s, tid %lu\n",
235 "writer", urcu_get_thread_id());
236 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
237 return ((void*)2);
238 }
239
240 static
241 void show_usage(int argc, char **argv)
242 {
243 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
244 argv[0]);
245 printf("OPTIONS:\n");
246 printf(" [-r] [-w] (yield reader and/or writer)\n");
247 printf(" [-d delay] (writer period (us))\n");
248 printf(" [-c duration] (reader C.S. duration (in loops))\n");
249 printf(" [-e duration] (writer C.S. duration (in loops))\n");
250 printf(" [-v] (verbose output)\n");
251 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
252 printf("\n");
253 }
254
255 int main(int argc, char **argv)
256 {
257 int err;
258 pthread_t *tid_reader, *tid_writer;
259 void *tret;
260 unsigned long long *count_reader;
261 unsigned long long tot_reads = 0, tot_writes = 0;
262 int i, a;
263 unsigned int i_thr;
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 tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
346
347 next_aff = 0;
348
349 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
350 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
351 &count_reader[i_thr]);
352 if (err != 0)
353 exit(1);
354 }
355 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
356 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
357 (void *)(long)i_thr);
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_thr = 0; i_thr < nr_readers; i_thr++) {
371 err = pthread_join(tid_reader[i_thr], &tret);
372 if (err != 0)
373 exit(1);
374 tot_reads += count_reader[i_thr];
375 }
376 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
377 err = pthread_join(tid_writer[i_thr], &tret);
378 if (err != 0)
379 exit(1);
380 tot_writes += tot_nr_writes[i_thr];
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(tid_reader);
392 free(tid_writer);
393 free(count_reader);
394 free(tot_nr_writes);
395
396 return 0;
397 }
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