Add support for OpenBSD
[urcu.git] / tests / benchmark / test_urcu_timing.c
CommitLineData
20bf310a
MD
1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6982d6d7 6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
20bf310a 7 *
af02d47e
MD
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.
20bf310a
MD
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>
94b343fd 31#include <errno.h>
01477510 32
ec4e58a3 33#include <urcu/arch.h>
01477510 34#include <urcu/assert.h>
20bf310a 35
94df6318 36#include "thread-id.h"
20bf310a 37
121a5d44 38#define _LGPL_SOURCE
ec4e58a3 39#include <urcu.h>
20bf310a 40
c265818b
MD
41pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
42
61c3fb60 43static
c265818b
MD
44void rcu_copy_mutex_lock(void)
45{
46 int ret;
47 ret = pthread_mutex_lock(&rcu_copy_mutex);
48 if (ret) {
49 perror("Error in pthread mutex lock");
50 exit(-1);
51 }
52}
53
61c3fb60 54static
c265818b
MD
55void rcu_copy_mutex_unlock(void)
56{
57 int ret;
58
59 ret = pthread_mutex_unlock(&rcu_copy_mutex);
60 if (ret) {
61 perror("Error in pthread mutex unlock");
62 exit(-1);
63 }
64}
65
20bf310a
MD
66struct test_array {
67 int a;
68};
69
70static struct test_array *test_rcu_pointer;
71
72#define OUTER_READ_LOOP 2000U
73#define INNER_READ_LOOP 100000U
74#define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
75
102d1d23
MD
76#define OUTER_WRITE_LOOP 10U
77#define INNER_WRITE_LOOP 200U
78#define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
20bf310a 79
2c9689fe
MD
80static int num_read;
81static int num_write;
20bf310a 82
2c9689fe
MD
83#define NR_READ num_read
84#define NR_WRITE num_write
85
3fa18286
MD
86static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
87static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
20bf310a 88
61c3fb60 89static
20bf310a
MD
90void *thr_reader(void *arg)
91{
83e334d0 92 unsigned int i, j;
20bf310a 93 struct test_array *local_ptr;
3fa18286 94 caa_cycles_t time1, time2;
20bf310a 95
94df6318
MD
96 printf("thread_begin %s, tid %lu\n",
97 "reader", urcu_get_thread_id());
20bf310a
MD
98 sleep(2);
99
121a5d44 100 rcu_register_thread();
20bf310a 101
06f22bdb 102 time1 = caa_get_cycles();
20bf310a
MD
103 for (i = 0; i < OUTER_READ_LOOP; i++) {
104 for (j = 0; j < INNER_READ_LOOP; j++) {
1430ee0b 105 rcu_read_lock();
20bf310a
MD
106 local_ptr = rcu_dereference(test_rcu_pointer);
107 if (local_ptr) {
01477510 108 urcu_posix_assert(local_ptr->a == 8);
20bf310a 109 }
1430ee0b 110 rcu_read_unlock();
20bf310a
MD
111 }
112 }
06f22bdb 113 time2 = caa_get_cycles();
20bf310a 114
121a5d44 115 rcu_unregister_thread();
20bf310a
MD
116
117 reader_time[(unsigned long)arg] = time2 - time1;
118
119 sleep(2);
94df6318
MD
120 printf("thread_end %s, tid %lu\n",
121 "reader", urcu_get_thread_id());
20bf310a
MD
122 return ((void*)1);
123
124}
125
61c3fb60 126static
20bf310a
MD
127void *thr_writer(void *arg)
128{
83e334d0 129 unsigned int i, j;
20bf310a 130 struct test_array *new, *old;
3fa18286 131 caa_cycles_t time1, time2;
20bf310a 132
94df6318
MD
133 printf("thread_begin %s, tid %lu\n",
134 "writer", urcu_get_thread_id());
20bf310a
MD
135 sleep(2);
136
102d1d23 137 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
102d1d23 138 for (j = 0; j < INNER_WRITE_LOOP; j++) {
06f22bdb 139 time1 = caa_get_cycles();
102d1d23
MD
140 new = malloc(sizeof(struct test_array));
141 rcu_copy_mutex_lock();
142 old = test_rcu_pointer;
143 if (old) {
01477510 144 urcu_posix_assert(old->a == 8);
102d1d23
MD
145 }
146 new->a = 8;
d2835e6f 147 old = rcu_xchg_pointer(&test_rcu_pointer, new);
102d1d23 148 rcu_copy_mutex_unlock();
d2835e6f 149 synchronize_rcu();
102d1d23
MD
150 /* can be done after unlock */
151 if (old) {
152 old->a = 0;
153 }
154 free(old);
06f22bdb 155 time2 = caa_get_cycles();
fc606a74
MD
156 writer_time[(unsigned long)arg] += time2 - time1;
157 usleep(1);
20bf310a 158 }
20bf310a
MD
159 }
160
94df6318
MD
161 printf("thread_end %s, tid %lu\n",
162 "writer", urcu_get_thread_id());
20bf310a
MD
163 return ((void*)2);
164}
165
2c9689fe 166int main(int argc, char **argv)
20bf310a
MD
167{
168 int err;
2c9689fe 169 pthread_t *tid_reader, *tid_writer;
20bf310a
MD
170 void *tret;
171 int i;
3fa18286
MD
172 caa_cycles_t tot_rtime = 0;
173 caa_cycles_t tot_wtime = 0;
20bf310a 174
2c9689fe
MD
175 if (argc < 2) {
176 printf("Usage : %s nr_readers nr_writers\n", argv[0]);
177 exit(-1);
178 }
179 num_read = atoi(argv[1]);
180 num_write = atoi(argv[2]);
181
9aa14175
MD
182 reader_time = calloc(num_read, sizeof(*reader_time));
183 writer_time = calloc(num_write, sizeof(*writer_time));
184 tid_reader = calloc(num_read, sizeof(*tid_reader));
185 tid_writer = calloc(num_write, sizeof(*tid_writer));
2c9689fe 186
94df6318
MD
187 printf("thread %-6s, tid %lu\n",
188 "main", urcu_get_thread_id());
20bf310a
MD
189
190 for (i = 0; i < NR_READ; i++) {
191 err = pthread_create(&tid_reader[i], NULL, thr_reader,
192 (void *)(long)i);
193 if (err != 0)
194 exit(1);
195 }
196 for (i = 0; i < NR_WRITE; i++) {
102d1d23
MD
197 err = pthread_create(&tid_writer[i], NULL, thr_writer,
198 (void *)(long)i);
20bf310a
MD
199 if (err != 0)
200 exit(1);
201 }
202
203 sleep(10);
204
205 for (i = 0; i < NR_READ; i++) {
206 err = pthread_join(tid_reader[i], &tret);
207 if (err != 0)
208 exit(1);
102d1d23 209 tot_rtime += reader_time[i];
20bf310a
MD
210 }
211 for (i = 0; i < NR_WRITE; i++) {
212 err = pthread_join(tid_writer[i], &tret);
213 if (err != 0)
214 exit(1);
102d1d23 215 tot_wtime += writer_time[i];
20bf310a
MD
216 }
217 free(test_rcu_pointer);
218 printf("Time per read : %g cycles\n",
102d1d23
MD
219 (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
220 printf("Time per write : %g cycles\n",
221 (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
20bf310a 222
2c9689fe
MD
223 free(reader_time);
224 free(writer_time);
225 free(tid_reader);
226 free(tid_writer);
227
20bf310a
MD
228 return 0;
229}
This page took 0.056666 seconds and 4 git commands to generate.