Fix: change method used by _rcu_dereference to strip type constness
[urcu.git] / tests / benchmark / test_urcu_qsbr.c
CommitLineData
de10a585
MD
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
de10a585
MD
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>
de10a585
MD
31#include <errno.h>
32
33#include <urcu/arch.h>
01477510 34#include <urcu/assert.h>
bd252a04 35#include <urcu/tls-compat.h>
94df6318 36#include "thread-id.h"
2650042a 37#include "../common/debug-yield.h"
de10a585
MD
38
39/* hardcoded number of CPUs */
40#define NR_CPUS 16384
41
de10a585
MD
42#ifndef DYNAMIC_LINK_TEST
43#define _LGPL_SOURCE
de10a585
MD
44#endif
45#include "urcu-qsbr.h"
46
de10a585
MD
47static volatile int test_go, test_stop;
48
49static unsigned long wdelay;
50
bcc74df3 51static int *test_rcu_pointer;
de10a585
MD
52
53static unsigned long duration;
54
55/* read-side C.S. duration, in loops */
56static unsigned long rduration;
57
58/* write-side C.S. duration, in loops */
59static unsigned long wduration;
60
ab0aacbe 61static inline void loop_sleep(unsigned long loops)
de10a585 62{
ab0aacbe 63 while (loops-- != 0)
de10a585
MD
64 caa_cpu_relax();
65}
66
67static int verbose_mode;
68
69#define printf_verbose(fmt, args...) \
70 do { \
71 if (verbose_mode) \
72 printf(fmt, args); \
73 } while (0)
74
75static unsigned int cpu_affinities[NR_CPUS];
76static unsigned int next_aff = 0;
77static int use_affinity = 0;
78
79pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
80
de10a585
MD
81static void set_affinity(void)
82{
2388c075 83#ifdef HAVE_SCHED_SETAFFINITY
de10a585 84 cpu_set_t mask;
95bc7fb9
MD
85 int cpu, ret;
86#endif /* HAVE_SCHED_SETAFFINITY */
de10a585
MD
87
88 if (!use_affinity)
89 return;
90
2388c075 91#ifdef HAVE_SCHED_SETAFFINITY
de10a585
MD
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 CPU_ZERO(&mask);
104 CPU_SET(cpu, &mask);
de10a585 105 sched_setaffinity(0, sizeof(mask), &mask);
de10a585
MD
106#endif /* HAVE_SCHED_SETAFFINITY */
107}
108
109/*
110 * returns 0 if test should end.
111 */
112static int test_duration_write(void)
113{
114 return !test_stop;
115}
116
117static int test_duration_read(void)
118{
119 return !test_stop;
120}
121
bd252a04
MD
122static DEFINE_URCU_TLS(unsigned long long, nr_writes);
123static DEFINE_URCU_TLS(unsigned long long, nr_reads);
de10a585
MD
124
125static unsigned int nr_readers;
126static unsigned int nr_writers;
127
128pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
129
61c3fb60 130static
de10a585
MD
131void *thr_reader(void *_count)
132{
133 unsigned long long *count = _count;
bcc74df3 134 int *local_ptr;
de10a585 135
94df6318
MD
136 printf_verbose("thread_begin %s, tid %lu\n",
137 "reader", urcu_get_thread_id());
de10a585
MD
138
139 set_affinity();
140
141 rcu_register_thread();
142
01477510 143 urcu_posix_assert(rcu_read_ongoing());
882f3357 144 rcu_thread_offline();
01477510 145 urcu_posix_assert(!rcu_read_ongoing());
882f3357
MD
146 rcu_thread_online();
147
de10a585
MD
148 while (!test_go)
149 {
150 }
151 cmm_smp_mb();
152
153 for (;;) {
154 rcu_read_lock();
01477510 155 urcu_posix_assert(rcu_read_ongoing());
de10a585 156 local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b 157 rcu_debug_yield_read();
de10a585 158 if (local_ptr)
01477510 159 urcu_posix_assert(*local_ptr == 8);
a0b7f7ea 160 if (caa_unlikely(rduration))
de10a585
MD
161 loop_sleep(rduration);
162 rcu_read_unlock();
bd252a04 163 URCU_TLS(nr_reads)++;
de10a585 164 /* QS each 1024 reads */
bd252a04 165 if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
de10a585 166 rcu_quiescent_state();
a0b7f7ea 167 if (caa_unlikely(!test_duration_read()))
de10a585
MD
168 break;
169 }
170
171 rcu_unregister_thread();
172
173 /* test extra thread registration */
174 rcu_register_thread();
175 rcu_unregister_thread();
176
bd252a04 177 *count = URCU_TLS(nr_reads);
94df6318
MD
178 printf_verbose("thread_end %s, tid %lu\n",
179 "reader", urcu_get_thread_id());
de10a585
MD
180 return ((void*)1);
181
182}
183
61c3fb60 184static
de10a585
MD
185void *thr_writer(void *_count)
186{
187 unsigned long long *count = _count;
bcc74df3 188 int *new, *old;
de10a585 189
94df6318
MD
190 printf_verbose("thread_begin %s, tid %lu\n",
191 "writer", urcu_get_thread_id());
de10a585
MD
192
193 set_affinity();
194
195 while (!test_go)
196 {
197 }
198 cmm_smp_mb();
199
200 for (;;) {
bcc74df3 201 new = malloc(sizeof(int));
01477510 202 urcu_posix_assert(new);
bcc74df3 203 *new = 8;
de10a585 204 old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea 205 if (caa_unlikely(wduration))
de10a585
MD
206 loop_sleep(wduration);
207 synchronize_rcu();
de10a585 208 if (old)
bcc74df3
MD
209 *old = 0;
210 free(old);
bd252a04 211 URCU_TLS(nr_writes)++;
a0b7f7ea 212 if (caa_unlikely(!test_duration_write()))
de10a585 213 break;
a0b7f7ea 214 if (caa_unlikely(wdelay))
de10a585
MD
215 loop_sleep(wdelay);
216 }
217
94df6318
MD
218 printf_verbose("thread_end %s, tid %lu\n",
219 "writer", urcu_get_thread_id());
bd252a04 220 *count = URCU_TLS(nr_writes);
de10a585
MD
221 return ((void*)2);
222}
223
61c3fb60 224static
70469b43 225void show_usage(char **argv)
de10a585 226{
06637138
MD
227 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
228 argv[0]);
229 printf("OPTIONS:\n");
06637138 230 printf(" [-r] [-w] (yield reader and/or writer)\n");
06637138
MD
231 printf(" [-d delay] (writer period (us))\n");
232 printf(" [-c duration] (reader C.S. duration (in loops))\n");
233 printf(" [-e duration] (writer C.S. duration (in loops))\n");
234 printf(" [-v] (verbose output)\n");
235 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
de10a585
MD
236 printf("\n");
237}
238
239int main(int argc, char **argv)
240{
241 int err;
242 pthread_t *tid_reader, *tid_writer;
243 void *tret;
244 unsigned long long *count_reader, *count_writer;
245 unsigned long long tot_reads = 0, tot_writes = 0;
246 int i, a;
83e334d0 247 unsigned int i_thr;
de10a585
MD
248
249 if (argc < 4) {
70469b43 250 show_usage(argv);
de10a585
MD
251 return -1;
252 }
253
254 err = sscanf(argv[1], "%u", &nr_readers);
255 if (err != 1) {
70469b43 256 show_usage(argv);
de10a585
MD
257 return -1;
258 }
259
260 err = sscanf(argv[2], "%u", &nr_writers);
261 if (err != 1) {
70469b43 262 show_usage(argv);
de10a585
MD
263 return -1;
264 }
83e334d0 265
de10a585
MD
266 err = sscanf(argv[3], "%lu", &duration);
267 if (err != 1) {
70469b43 268 show_usage(argv);
de10a585
MD
269 return -1;
270 }
271
272 for (i = 4; i < argc; i++) {
273 if (argv[i][0] != '-')
274 continue;
275 switch (argv[i][1]) {
de10a585 276 case 'r':
2650042a 277 rcu_debug_yield_enable(RCU_YIELD_READ);
de10a585
MD
278 break;
279 case 'w':
2650042a 280 rcu_debug_yield_enable(RCU_YIELD_WRITE);
de10a585 281 break;
de10a585
MD
282 case 'a':
283 if (argc < i + 2) {
70469b43 284 show_usage(argv);
de10a585
MD
285 return -1;
286 }
287 a = atoi(argv[++i]);
288 cpu_affinities[next_aff++] = a;
289 use_affinity = 1;
290 printf_verbose("Adding CPU %d affinity\n", a);
291 break;
292 case 'c':
293 if (argc < i + 2) {
70469b43 294 show_usage(argv);
de10a585
MD
295 return -1;
296 }
297 rduration = atol(argv[++i]);
298 break;
299 case 'd':
300 if (argc < i + 2) {
70469b43 301 show_usage(argv);
de10a585
MD
302 return -1;
303 }
304 wdelay = atol(argv[++i]);
305 break;
306 case 'e':
307 if (argc < i + 2) {
70469b43 308 show_usage(argv);
de10a585
MD
309 return -1;
310 }
311 wduration = atol(argv[++i]);
312 break;
313 case 'v':
314 verbose_mode = 1;
315 break;
316 }
317 }
318
319 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
320 duration, nr_readers, nr_writers);
321 printf_verbose("Writer delay : %lu loops.\n", wdelay);
322 printf_verbose("Reader duration : %lu loops.\n", rduration);
94df6318
MD
323 printf_verbose("thread %-6s, tid %lu\n",
324 "main", urcu_get_thread_id());
de10a585 325
9aa14175
MD
326 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
327 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
328 count_reader = calloc(nr_readers, sizeof(*count_reader));
329 count_writer = calloc(nr_writers, sizeof(*count_writer));
de10a585
MD
330
331 next_aff = 0;
332
83e334d0
MJ
333 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
334 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
335 &count_reader[i_thr]);
de10a585
MD
336 if (err != 0)
337 exit(1);
338 }
83e334d0
MJ
339 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
340 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
341 &count_writer[i_thr]);
de10a585
MD
342 if (err != 0)
343 exit(1);
344 }
345
346 cmm_smp_mb();
347
348 test_go = 1;
349
350 sleep(duration);
351
352 test_stop = 1;
353
83e334d0
MJ
354 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
355 err = pthread_join(tid_reader[i_thr], &tret);
de10a585
MD
356 if (err != 0)
357 exit(1);
83e334d0 358 tot_reads += count_reader[i_thr];
de10a585 359 }
83e334d0
MJ
360 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
361 err = pthread_join(tid_writer[i_thr], &tret);
de10a585
MD
362 if (err != 0)
363 exit(1);
83e334d0 364 tot_writes += count_writer[i_thr];
de10a585 365 }
83e334d0 366
de10a585
MD
367 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
368 tot_writes);
369 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
370 "nr_writers %3u "
371 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
372 argv[0], duration, nr_readers, rduration, wduration,
373 nr_writers, wdelay, tot_reads, tot_writes,
374 tot_reads + tot_writes);
bcc74df3 375 free(test_rcu_pointer);
de10a585
MD
376 free(tid_reader);
377 free(tid_writer);
378 free(count_reader);
379 free(count_writer);
380 return 0;
381}
This page took 0.075598 seconds and 4 git commands to generate.