Add S390 architecture specific headers
[urcu.git] / test_mutex.c
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1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
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#define _GNU_SOURCE
24#include <stdio.h>
25#include <pthread.h>
26#include <stdlib.h>
27#include <string.h>
28#include <sys/types.h>
29#include <sys/wait.h>
30#include <unistd.h>
31#include <stdio.h>
32#include <assert.h>
33#include <sys/syscall.h>
34#include <sched.h>
35
36#include "arch.h"
37
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38/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
39#define CACHE_LINE_SIZE 4096
40
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41/* hardcoded number of CPUs */
42#define NR_CPUS 16384
43
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44#if defined(_syscall0)
45_syscall0(pid_t, gettid)
46#elif defined(__NR_gettid)
47static inline pid_t gettid(void)
48{
49 return syscall(__NR_gettid);
50}
51#else
52#warning "use pid as tid"
53static inline pid_t gettid(void)
54{
55 return getpid();
56}
57#endif
58
59#ifndef DYNAMIC_LINK_TEST
60#define _LGPL_SOURCE
61#else
62#define debug_yield_read()
63#endif
64#include "urcu.h"
65
66struct test_array {
67 int a;
68};
69
70static pthread_mutex_t lock;
71
72static volatile int test_go, test_stop;
73
9e31d0f0 74static unsigned long wdelay;
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75
76static volatile struct test_array test_array = { 8 };
77
78static unsigned long duration;
79
daddf5b0 80/* read-side C.S. duration, in loops */
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81static unsigned long rduration;
82
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83static inline void loop_sleep(unsigned long l)
84{
85 while(l-- != 0)
86 cpu_relax();
87}
88
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89static int verbose_mode;
90
91#define printf_verbose(fmt, args...) \
92 do { \
93 if (verbose_mode) \
94 printf(fmt, args); \
95 } while (0)
96
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97static unsigned int cpu_affinities[NR_CPUS];
98static unsigned int next_aff = 0;
99static int use_affinity = 0;
100
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101pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
102
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103static void set_affinity(void)
104{
105 cpu_set_t mask;
106 int cpu;
6af882ba 107 int ret;
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108
109 if (!use_affinity)
110 return;
111
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112 ret = pthread_mutex_lock(&affinity_mutex);
113 if (ret) {
114 perror("Error in pthread mutex lock");
115 exit(-1);
116 }
2a7ac59d 117 cpu = cpu_affinities[next_aff++];
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118 ret = pthread_mutex_unlock(&affinity_mutex);
119 if (ret) {
120 perror("Error in pthread mutex unlock");
121 exit(-1);
122 }
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123 CPU_ZERO(&mask);
124 CPU_SET(cpu, &mask);
125 sched_setaffinity(0, sizeof(mask), &mask);
126}
127
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128/*
129 * returns 0 if test should end.
130 */
131static int test_duration_write(void)
132{
133 return !test_stop;
134}
135
136static int test_duration_read(void)
137{
138 return !test_stop;
139}
140
141static unsigned long long __thread nr_writes;
142static unsigned long long __thread nr_reads;
143
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144static
145unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
146static
147unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_reads;
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148
149static unsigned int nr_readers;
150static unsigned int nr_writers;
151
152pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
153
154void rcu_copy_mutex_lock(void)
155{
156 int ret;
157 ret = pthread_mutex_lock(&rcu_copy_mutex);
158 if (ret) {
159 perror("Error in pthread mutex lock");
160 exit(-1);
161 }
162}
163
164void rcu_copy_mutex_unlock(void)
165{
166 int ret;
167
168 ret = pthread_mutex_unlock(&rcu_copy_mutex);
169 if (ret) {
170 perror("Error in pthread mutex unlock");
171 exit(-1);
172 }
173}
174
175void *thr_reader(void *data)
176{
177 unsigned long tidx = (unsigned long)data;
178
4bad7d45 179 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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180 "reader", pthread_self(), (unsigned long)gettid());
181
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182 set_affinity();
183
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184 while (!test_go)
185 {
186 }
187
188 for (;;) {
189 pthread_mutex_lock(&lock);
190 assert(test_array.a == 8);
8b632bab 191 if (unlikely(rduration))
daddf5b0 192 loop_sleep(rduration);
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193 pthread_mutex_unlock(&lock);
194 nr_reads++;
195 if (unlikely(!test_duration_read()))
196 break;
197 }
198
199 tot_nr_reads[tidx] = nr_reads;
cda3c71d 200 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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201 "reader", pthread_self(), (unsigned long)gettid());
202 return ((void*)1);
203
204}
205
206void *thr_writer(void *data)
207{
208 unsigned long wtidx = (unsigned long)data;
209
4bad7d45 210 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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211 "writer", pthread_self(), (unsigned long)gettid());
212
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213 set_affinity();
214
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215 while (!test_go)
216 {
217 }
218 smp_mb();
219
220 for (;;) {
221 pthread_mutex_lock(&lock);
222 test_array.a = 0;
223 test_array.a = 8;
224 pthread_mutex_unlock(&lock);
225 nr_writes++;
226 if (unlikely(!test_duration_write()))
227 break;
228 if (unlikely(wdelay))
9e31d0f0 229 loop_sleep(wdelay);
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230 }
231
4bad7d45 232 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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233 "writer", pthread_self(), (unsigned long)gettid());
234 tot_nr_writes[wtidx] = nr_writes;
235 return ((void*)2);
236}
237
238void show_usage(int argc, char **argv)
239{
240 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
241#ifdef DEBUG_YIELD
242 printf(" [-r] [-w] (yield reader and/or writer)");
243#endif
244 printf(" [-d delay] (writer period (us))");
daddf5b0 245 printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45 246 printf(" [-v] (verbose output)");
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247 printf(" [-a cpu#] [-a cpu#]... (affinity)");
248 printf("\n");
249}
250
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251int main(int argc, char **argv)
252{
253 int err;
254 pthread_t *tid_reader, *tid_writer;
255 void *tret;
256 unsigned long long *count_reader, *count_writer;
257 unsigned long long tot_reads = 0, tot_writes = 0;
258 int i, a;
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259
260 if (argc < 4) {
261 show_usage(argc, argv);
262 return -1;
263 }
264 smp_mb();
265
266 err = sscanf(argv[1], "%u", &nr_readers);
267 if (err != 1) {
268 show_usage(argc, argv);
269 return -1;
270 }
271
272 err = sscanf(argv[2], "%u", &nr_writers);
273 if (err != 1) {
274 show_usage(argc, argv);
275 return -1;
276 }
277
278 err = sscanf(argv[3], "%lu", &duration);
279 if (err != 1) {
280 show_usage(argc, argv);
281 return -1;
282 }
283
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284 for (i = 4; i < argc; i++) {
285 if (argv[i][0] != '-')
286 continue;
287 switch (argv[i][1]) {
288#ifdef DEBUG_YIELD
289 case 'r':
290 yield_active |= YIELD_READ;
291 break;
292 case 'w':
293 yield_active |= YIELD_WRITE;
294 break;
295#endif
296 case 'a':
297 if (argc < i + 2) {
298 show_usage(argc, argv);
299 return -1;
300 }
301 a = atoi(argv[++i]);
2a7ac59d 302 cpu_affinities[next_aff++] = a;
51299083 303 use_affinity = 1;
4bad7d45 304 printf_verbose("Adding CPU %d affinity\n", a);
51299083 305 break;
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306 case 'c':
307 if (argc < i + 2) {
308 show_usage(argc, argv);
309 return -1;
310 }
9e31d0f0 311 rduration = atol(argv[++i]);
8b632bab 312 break;
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313 case 'd':
314 if (argc < i + 2) {
315 show_usage(argc, argv);
316 return -1;
317 }
9e31d0f0 318 wdelay = atol(argv[++i]);
51299083 319 break;
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320 case 'v':
321 verbose_mode = 1;
322 break;
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323 }
324 }
325
4bad7d45 326 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
51299083 327 duration, nr_readers, nr_writers);
9e31d0f0 328 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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329 printf_verbose("Reader duration : %lu loops.\n", rduration);
330 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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331 "main", pthread_self(), (unsigned long)gettid());
332
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333 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
334 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
335 count_reader = malloc(sizeof(*count_reader) * nr_readers);
336 count_writer = malloc(sizeof(*count_writer) * nr_writers);
337 tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
338 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
339
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340 next_aff = 0;
341
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342 for (i = 0; i < nr_readers; i++) {
343 err = pthread_create(&tid_reader[i], NULL, thr_reader,
344 (void *)(long)i);
345 if (err != 0)
346 exit(1);
347 }
348 for (i = 0; i < nr_writers; i++) {
349 err = pthread_create(&tid_writer[i], NULL, thr_writer,
350 (void *)(long)i);
351 if (err != 0)
352 exit(1);
353 }
354
355 smp_mb();
356
357 test_go = 1;
358
359 sleep(duration);
360
361 test_stop = 1;
362
363 for (i = 0; i < nr_readers; i++) {
364 err = pthread_join(tid_reader[i], &tret);
365 if (err != 0)
366 exit(1);
367 tot_reads += tot_nr_reads[i];
368 }
369 for (i = 0; i < nr_writers; i++) {
370 err = pthread_join(tid_writer[i], &tret);
371 if (err != 0)
372 exit(1);
373 tot_writes += tot_nr_writes[i];
374 }
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375
376 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
51299083 377 tot_writes);
6a190115 378 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d 379 "nr_writers %3u "
9e31d0f0 380 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
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381 argv[0], duration, nr_readers, rduration,
382 nr_writers, wdelay, tot_reads, tot_writes,
383 tot_reads + tot_writes);
384
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385 free(tid_reader);
386 free(tid_writer);
387 free(count_reader);
388 free(count_writer);
389 free(tot_nr_reads);
390 free(tot_nr_writes);
391 return 0;
392}
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