Cleanup: enable signed/unsigned compare compiler warning
[urcu.git] / tests / benchmark / test_urcu_defer.c
CommitLineData
90075a50 1/*
786ee85b 2 * test_urcu_defer.c
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3 *
4 * Userspace RCU library - test program (with automatic reclamation)
5 *
6982d6d7 6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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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
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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>
94b343fd 32#include <errno.h>
90075a50 33
ec4e58a3 34#include <urcu/arch.h>
bd252a04 35#include <urcu/tls-compat.h>
2953b501 36#include "cpuset.h"
94df6318 37#include "thread-id.h"
2650042a 38#include "../common/debug-yield.h"
65fcc7e9 39
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40/* hardcoded number of CPUs */
41#define NR_CPUS 16384
42
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43#ifndef DYNAMIC_LINK_TEST
44#define _LGPL_SOURCE
90075a50 45#endif
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46#include <urcu.h>
47#include <urcu-defer.h>
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48
49struct test_array {
50 int a;
51};
52
53static volatile int test_go, test_stop;
54
55static unsigned long wdelay;
56
57static struct test_array *test_rcu_pointer;
58
59static unsigned long duration;
60
61/* read-side C.S. duration, in loops */
62static unsigned long rduration;
63
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64/* write-side C.S. duration, in loops */
65static unsigned long wduration;
66
ab0aacbe 67static inline void loop_sleep(unsigned long loops)
90075a50 68{
ab0aacbe 69 while (loops-- != 0)
06f22bdb 70 caa_cpu_relax();
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71}
72
73static int verbose_mode;
74
75#define printf_verbose(fmt, args...) \
76 do { \
77 if (verbose_mode) \
78 printf(fmt, args); \
79 } while (0)
80
81static unsigned int cpu_affinities[NR_CPUS];
82static unsigned int next_aff = 0;
83static int use_affinity = 0;
84
85pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
86
87static void set_affinity(void)
88{
95bc7fb9 89#if HAVE_SCHED_SETAFFINITY
90075a50 90 cpu_set_t mask;
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91 int cpu, ret;
92#endif /* HAVE_SCHED_SETAFFINITY */
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93
94 if (!use_affinity)
95 return;
96
d8540fc5 97#if HAVE_SCHED_SETAFFINITY
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98 ret = pthread_mutex_lock(&affinity_mutex);
99 if (ret) {
100 perror("Error in pthread mutex lock");
101 exit(-1);
102 }
103 cpu = cpu_affinities[next_aff++];
104 ret = pthread_mutex_unlock(&affinity_mutex);
105 if (ret) {
106 perror("Error in pthread mutex unlock");
107 exit(-1);
108 }
d8540fc5 109
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110 CPU_ZERO(&mask);
111 CPU_SET(cpu, &mask);
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112#if SCHED_SETAFFINITY_ARGS == 2
113 sched_setaffinity(0, &mask);
114#else
90075a50 115 sched_setaffinity(0, sizeof(mask), &mask);
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116#endif
117#endif /* HAVE_SCHED_SETAFFINITY */
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118}
119
120/*
121 * returns 0 if test should end.
122 */
123static int test_duration_write(void)
124{
125 return !test_stop;
126}
127
128static int test_duration_read(void)
129{
130 return !test_stop;
131}
132
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133static DEFINE_URCU_TLS(unsigned long long, nr_writes);
134static DEFINE_URCU_TLS(unsigned long long, nr_reads);
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135
136static
06f22bdb 137unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
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138
139static unsigned int nr_readers;
140static unsigned int nr_writers;
141
142pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
143
144void rcu_copy_mutex_lock(void)
145{
146 int ret;
147 ret = pthread_mutex_lock(&rcu_copy_mutex);
148 if (ret) {
149 perror("Error in pthread mutex lock");
150 exit(-1);
151 }
152}
153
154void rcu_copy_mutex_unlock(void)
155{
156 int ret;
157
158 ret = pthread_mutex_unlock(&rcu_copy_mutex);
159 if (ret) {
160 perror("Error in pthread mutex unlock");
161 exit(-1);
162 }
163}
164
165void *thr_reader(void *_count)
166{
167 unsigned long long *count = _count;
168 struct test_array *local_ptr;
169
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170 printf_verbose("thread_begin %s, tid %lu\n",
171 "reader", urcu_get_thread_id());
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172
173 set_affinity();
174
175 rcu_register_thread();
176
177 while (!test_go)
178 {
179 }
5481ddb3 180 cmm_smp_mb();
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181
182 for (;;) {
183 rcu_read_lock();
184 local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b 185 rcu_debug_yield_read();
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186 if (local_ptr)
187 assert(local_ptr->a == 8);
a0b7f7ea 188 if (caa_unlikely(rduration))
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189 loop_sleep(rduration);
190 rcu_read_unlock();
bd252a04 191 URCU_TLS(nr_reads)++;
a0b7f7ea 192 if (caa_unlikely(!test_duration_read()))
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193 break;
194 }
195
196 rcu_unregister_thread();
197
bd252a04 198 *count = URCU_TLS(nr_reads);
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199 printf_verbose("thread_end %s, tid %lu\n",
200 "reader", urcu_get_thread_id());
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201 return ((void*)1);
202
203}
204
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205static void test_cb2(void *data)
206{
207}
208
209static void test_cb1(void *data)
210{
211}
212
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213void *thr_writer(void *data)
214{
215 unsigned long wtidx = (unsigned long)data;
216 struct test_array *new, *old = NULL;
6ade67d5 217 int ret;
90075a50 218
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219 printf_verbose("thread_begin %s, tid %lu\n",
220 "writer", urcu_get_thread_id());
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221
222 set_affinity();
223
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224 ret = rcu_defer_register_thread();
225 if (ret) {
226 printf("Error in rcu_defer_register_thread\n");
227 exit(-1);
228 }
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229
230 while (!test_go)
231 {
232 }
5481ddb3 233 cmm_smp_mb();
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234
235 for (;;) {
236 new = malloc(sizeof(*new));
237 new->a = 8;
238 old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea 239 if (caa_unlikely(wduration))
31b598e0 240 loop_sleep(wduration);
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241 defer_rcu(free, old);
242 defer_rcu(test_cb1, old);
243 defer_rcu(test_cb1, (void *)-2L);
244 defer_rcu(test_cb1, (void *)-2L);
245 defer_rcu(test_cb1, old);
246 defer_rcu(test_cb2, (void *)-2L);
247 defer_rcu(test_cb2, (void *)-4L);
248 defer_rcu(test_cb2, (void *)-2L);
bd252a04 249 URCU_TLS(nr_writes)++;
a0b7f7ea 250 if (caa_unlikely(!test_duration_write()))
90075a50 251 break;
a0b7f7ea 252 if (caa_unlikely(wdelay))
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253 loop_sleep(wdelay);
254 }
255
786ee85b 256 rcu_defer_unregister_thread();
90075a50 257
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258 printf_verbose("thread_end %s, tid %lu\n",
259 "writer", urcu_get_thread_id());
bd252a04 260 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
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261 return ((void*)2);
262}
263
264void show_usage(int argc, char **argv)
265{
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266 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
267 argv[0]);
268 printf("OPTIONS:\n");
06637138 269 printf(" [-r] [-w] (yield reader and/or writer)\n");
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270 printf(" [-d delay] (writer period (us))\n");
271 printf(" [-c duration] (reader C.S. duration (in loops))\n");
272 printf(" [-e duration] (writer C.S. duration (in loops))\n");
273 printf(" [-v] (verbose output)\n");
274 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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275 printf("\n");
276}
277
278int main(int argc, char **argv)
279{
280 int err;
281 pthread_t *tid_reader, *tid_writer;
282 void *tret;
283 unsigned long long *count_reader;
284 unsigned long long tot_reads = 0, tot_writes = 0;
285 int i, a;
83e334d0 286 unsigned int i_thr;
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287
288 if (argc < 4) {
289 show_usage(argc, argv);
290 return -1;
291 }
292
293 err = sscanf(argv[1], "%u", &nr_readers);
294 if (err != 1) {
295 show_usage(argc, argv);
296 return -1;
297 }
298
299 err = sscanf(argv[2], "%u", &nr_writers);
300 if (err != 1) {
301 show_usage(argc, argv);
302 return -1;
303 }
83e334d0 304
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305 err = sscanf(argv[3], "%lu", &duration);
306 if (err != 1) {
307 show_usage(argc, argv);
308 return -1;
309 }
310
311 for (i = 4; i < argc; i++) {
312 if (argv[i][0] != '-')
313 continue;
314 switch (argv[i][1]) {
90075a50 315 case 'r':
2650042a 316 rcu_debug_yield_enable(RCU_YIELD_READ);
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317 break;
318 case 'w':
2650042a 319 rcu_debug_yield_enable(RCU_YIELD_WRITE);
90075a50 320 break;
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321 case 'a':
322 if (argc < i + 2) {
323 show_usage(argc, argv);
324 return -1;
325 }
326 a = atoi(argv[++i]);
327 cpu_affinities[next_aff++] = a;
328 use_affinity = 1;
329 printf_verbose("Adding CPU %d affinity\n", a);
330 break;
331 case 'c':
332 if (argc < i + 2) {
333 show_usage(argc, argv);
334 return -1;
335 }
336 rduration = atol(argv[++i]);
337 break;
338 case 'd':
339 if (argc < i + 2) {
340 show_usage(argc, argv);
341 return -1;
342 }
343 wdelay = atol(argv[++i]);
344 break;
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345 case 'e':
346 if (argc < i + 2) {
347 show_usage(argc, argv);
348 return -1;
349 }
350 wduration = atol(argv[++i]);
351 break;
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352 case 'v':
353 verbose_mode = 1;
354 break;
355 }
356 }
357
358 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
359 duration, nr_readers, nr_writers);
360 printf_verbose("Writer delay : %lu loops.\n", wdelay);
361 printf_verbose("Reader duration : %lu loops.\n", rduration);
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362 printf_verbose("thread %-6s, tid %lu\n",
363 "main", urcu_get_thread_id());
90075a50 364
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365 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
366 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
367 count_reader = calloc(nr_readers, sizeof(*count_reader));
368 tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
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369
370 next_aff = 0;
371
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372 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
373 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
374 &count_reader[i_thr]);
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375 if (err != 0)
376 exit(1);
377 }
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378 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
379 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
380 (void *)(long)i_thr);
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381 if (err != 0)
382 exit(1);
383 }
384
5481ddb3 385 cmm_smp_mb();
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386
387 test_go = 1;
388
389 sleep(duration);
390
391 test_stop = 1;
392
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393 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
394 err = pthread_join(tid_reader[i_thr], &tret);
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395 if (err != 0)
396 exit(1);
83e334d0 397 tot_reads += count_reader[i_thr];
90075a50 398 }
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399 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
400 err = pthread_join(tid_writer[i_thr], &tret);
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401 if (err != 0)
402 exit(1);
83e334d0 403 tot_writes += tot_nr_writes[i_thr];
90075a50 404 }
83e334d0 405
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406 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
407 tot_writes);
a50a7b43 408 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
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409 "nr_writers %3u "
410 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 411 argv[0], duration, nr_readers, rduration, wduration,
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412 nr_writers, wdelay, tot_reads, tot_writes,
413 tot_reads + tot_writes);
414 free(tid_reader);
415 free(tid_writer);
416 free(count_reader);
417 free(tot_nr_writes);
418
419 return 0;
420}
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