Fix: change method used by _rcu_dereference to strip type constness
[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 <errno.h>
32
33 #include <urcu/assert.h>
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
47 static volatile int test_go, test_stop;
48
49 static unsigned long wdelay;
50
51 static int *test_rcu_pointer;
52
53 static unsigned long duration;
54
55 /* read-side C.S. duration, in loops */
56 static unsigned long rduration;
57
58 /* write-side C.S. duration, in loops */
59 static unsigned long wduration;
60
61 static inline void loop_sleep(unsigned long loops)
62 {
63 while (loops-- != 0)
64 caa_cpu_relax();
65 }
66
67 static int verbose_mode;
68
69 #define printf_verbose(fmt, args...) \
70 do { \
71 if (verbose_mode) \
72 printf(fmt, args); \
73 } while (0)
74
75 static unsigned int cpu_affinities[NR_CPUS];
76 static unsigned int next_aff = 0;
77 static int use_affinity = 0;
78
79 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
80
81 static void set_affinity(void)
82 {
83 #ifdef HAVE_SCHED_SETAFFINITY
84 cpu_set_t mask;
85 int cpu, ret;
86 #endif /* HAVE_SCHED_SETAFFINITY */
87
88 if (!use_affinity)
89 return;
90
91 #ifdef HAVE_SCHED_SETAFFINITY
92 ret = pthread_mutex_lock(&affinity_mutex);
93 if (ret) {
94 perror("Error in pthread mutex lock");
95 exit(-1);
96 }
97 cpu = cpu_affinities[next_aff++];
98 ret = pthread_mutex_unlock(&affinity_mutex);
99 if (ret) {
100 perror("Error in pthread mutex unlock");
101 exit(-1);
102 }
103
104 CPU_ZERO(&mask);
105 CPU_SET(cpu, &mask);
106 sched_setaffinity(0, sizeof(mask), &mask);
107 #endif /* HAVE_SCHED_SETAFFINITY */
108 }
109
110 /*
111 * returns 0 if test should end.
112 */
113 static int test_duration_write(void)
114 {
115 return !test_stop;
116 }
117
118 static int test_duration_read(void)
119 {
120 return !test_stop;
121 }
122
123 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
124 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
125
126 static unsigned int nr_readers;
127 static unsigned int nr_writers;
128
129 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
130
131 static
132 void *thr_reader(void *_count)
133 {
134 unsigned long long *count = _count;
135 int *local_ptr;
136
137 printf_verbose("thread_begin %s, tid %lu\n",
138 "reader", urcu_get_thread_id());
139
140 set_affinity();
141
142 rcu_register_thread();
143 urcu_posix_assert(!rcu_read_ongoing());
144
145 while (!test_go)
146 {
147 }
148 cmm_smp_mb();
149
150 for (;;) {
151 rcu_read_lock();
152 urcu_posix_assert(rcu_read_ongoing());
153 local_ptr = rcu_dereference(test_rcu_pointer);
154 rcu_debug_yield_read();
155 if (local_ptr)
156 urcu_posix_assert(*local_ptr == 8);
157 if (caa_unlikely(rduration))
158 loop_sleep(rduration);
159 rcu_read_unlock();
160 URCU_TLS(nr_reads)++;
161 if (caa_unlikely(!test_duration_read()))
162 break;
163 }
164
165 rcu_unregister_thread();
166
167 /* test extra thread registration */
168 rcu_register_thread();
169 rcu_unregister_thread();
170
171 *count = URCU_TLS(nr_reads);
172 printf_verbose("thread_end %s, tid %lu\n",
173 "reader", urcu_get_thread_id());
174 return ((void*)1);
175
176 }
177
178 static
179 void *thr_writer(void *_count)
180 {
181 unsigned long long *count = _count;
182 int *new, *old;
183
184 printf_verbose("thread_begin %s, tid %lu\n",
185 "writer", urcu_get_thread_id());
186
187 set_affinity();
188
189 while (!test_go)
190 {
191 }
192 cmm_smp_mb();
193
194 for (;;) {
195 new = malloc(sizeof(int));
196 urcu_posix_assert(new);
197 *new = 8;
198 old = rcu_xchg_pointer(&test_rcu_pointer, new);
199 if (caa_unlikely(wduration))
200 loop_sleep(wduration);
201 synchronize_rcu();
202 if (old)
203 *old = 0;
204 free(old);
205 URCU_TLS(nr_writes)++;
206 if (caa_unlikely(!test_duration_write()))
207 break;
208 if (caa_unlikely(wdelay))
209 loop_sleep(wdelay);
210 }
211
212 printf_verbose("thread_end %s, tid %lu\n",
213 "writer", urcu_get_thread_id());
214 *count = URCU_TLS(nr_writes);
215 return ((void*)2);
216 }
217
218 static
219 void show_usage(char **argv)
220 {
221 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
222 argv[0]);
223 printf("OPTIONS:\n");
224 printf(" [-r] [-w] (yield reader and/or writer)\n");
225 printf(" [-d delay] (writer period (us))\n");
226 printf(" [-c duration] (reader C.S. duration (in loops))\n");
227 printf(" [-e duration] (writer C.S. duration (in loops))\n");
228 printf(" [-v] (verbose output)\n");
229 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
230 printf("\n");
231 }
232
233 int main(int argc, char **argv)
234 {
235 int err;
236 pthread_t *tid_reader, *tid_writer;
237 void *tret;
238 unsigned long long *count_reader, *count_writer;
239 unsigned long long tot_reads = 0, tot_writes = 0;
240 int i, a;
241 unsigned int i_thr;
242
243 if (argc < 4) {
244 show_usage(argv);
245 return -1;
246 }
247
248 err = sscanf(argv[1], "%u", &nr_readers);
249 if (err != 1) {
250 show_usage(argv);
251 return -1;
252 }
253
254 err = sscanf(argv[2], "%u", &nr_writers);
255 if (err != 1) {
256 show_usage(argv);
257 return -1;
258 }
259
260 err = sscanf(argv[3], "%lu", &duration);
261 if (err != 1) {
262 show_usage(argv);
263 return -1;
264 }
265
266 for (i = 4; i < argc; i++) {
267 if (argv[i][0] != '-')
268 continue;
269 switch (argv[i][1]) {
270 case 'r':
271 rcu_debug_yield_enable(RCU_YIELD_READ);
272 break;
273 case 'w':
274 rcu_debug_yield_enable(RCU_YIELD_WRITE);
275 break;
276 case 'a':
277 if (argc < i + 2) {
278 show_usage(argv);
279 return -1;
280 }
281 a = atoi(argv[++i]);
282 cpu_affinities[next_aff++] = a;
283 use_affinity = 1;
284 printf_verbose("Adding CPU %d affinity\n", a);
285 break;
286 case 'c':
287 if (argc < i + 2) {
288 show_usage(argv);
289 return -1;
290 }
291 rduration = atol(argv[++i]);
292 break;
293 case 'd':
294 if (argc < i + 2) {
295 show_usage(argv);
296 return -1;
297 }
298 wdelay = atol(argv[++i]);
299 break;
300 case 'e':
301 if (argc < i + 2) {
302 show_usage(argv);
303 return -1;
304 }
305 wduration = atol(argv[++i]);
306 break;
307 case 'v':
308 verbose_mode = 1;
309 break;
310 }
311 }
312
313 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
314 duration, nr_readers, nr_writers);
315 printf_verbose("Writer delay : %lu loops.\n", wdelay);
316 printf_verbose("Reader duration : %lu loops.\n", rduration);
317 printf_verbose("thread %-6s, tid %lu\n",
318 "main", urcu_get_thread_id());
319
320 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
321 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
322 count_reader = calloc(nr_readers, sizeof(*count_reader));
323 count_writer = calloc(nr_writers, sizeof(*count_writer));
324
325 next_aff = 0;
326
327 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
328 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
329 &count_reader[i_thr]);
330 if (err != 0)
331 exit(1);
332 }
333 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
334 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
335 &count_writer[i_thr]);
336 if (err != 0)
337 exit(1);
338 }
339
340 cmm_smp_mb();
341
342 test_go = 1;
343
344 sleep(duration);
345
346 test_stop = 1;
347
348 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
349 err = pthread_join(tid_reader[i_thr], &tret);
350 if (err != 0)
351 exit(1);
352 tot_reads += count_reader[i_thr];
353 }
354 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
355 err = pthread_join(tid_writer[i_thr], &tret);
356 if (err != 0)
357 exit(1);
358 tot_writes += count_writer[i_thr];
359 }
360
361 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
362 tot_writes);
363 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
364 "nr_writers %3u "
365 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
366 argv[0], duration, nr_readers, rduration, wduration,
367 nr_writers, wdelay, tot_reads, tot_writes,
368 tot_reads + tot_writes);
369 free(test_rcu_pointer);
370 free(tid_reader);
371 free(tid_writer);
372 free(count_reader);
373 free(count_writer);
374 return 0;
375 }
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