Add `urcu_posix_assert()` as `assert()` replacement
[urcu.git] / tests / benchmark / test_urcu_qsbr_timing.c
1 /*
2 * test_qsbr_timing.c
3 *
4 * Userspace QSBR - 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/arch.h>
34 #include <urcu/assert.h>
35 #include "thread-id.h"
36
37 #define _LGPL_SOURCE
38 #include <urcu-qsbr.h>
39
40 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
41
42 static
43 void rcu_copy_mutex_lock(void)
44 {
45 int ret;
46 ret = pthread_mutex_lock(&rcu_copy_mutex);
47 if (ret) {
48 perror("Error in pthread mutex lock");
49 exit(-1);
50 }
51 }
52
53 static
54 void rcu_copy_mutex_unlock(void)
55 {
56 int ret;
57
58 ret = pthread_mutex_unlock(&rcu_copy_mutex);
59 if (ret) {
60 perror("Error in pthread mutex unlock");
61 exit(-1);
62 }
63 }
64
65 struct test_array {
66 int a;
67 };
68
69 static struct test_array *test_rcu_pointer;
70
71 #define OUTER_READ_LOOP 2000U
72 #define INNER_READ_LOOP 100000U
73 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
74
75 #define OUTER_WRITE_LOOP 10U
76 #define INNER_WRITE_LOOP 200U
77 #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
78
79 static int num_read;
80 static int num_write;
81
82 #define NR_READ num_read
83 #define NR_WRITE num_write
84
85 static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
86 static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
87
88 static
89 void *thr_reader(void *arg)
90 {
91 unsigned int i, j;
92 struct test_array *local_ptr;
93 caa_cycles_t time1, time2;
94
95 printf("thread_begin %s, tid %lu\n",
96 "reader", urcu_get_thread_id());
97 sleep(2);
98
99 rcu_register_thread();
100
101 time1 = caa_get_cycles();
102 for (i = 0; i < OUTER_READ_LOOP; i++) {
103 for (j = 0; j < INNER_READ_LOOP; j++) {
104 _rcu_read_lock();
105 local_ptr = _rcu_dereference(test_rcu_pointer);
106 if (local_ptr) {
107 urcu_posix_assert(local_ptr->a == 8);
108 }
109 _rcu_read_unlock();
110 }
111 _rcu_quiescent_state();
112 }
113 time2 = caa_get_cycles();
114
115 rcu_unregister_thread();
116
117 reader_time[(unsigned long)arg] = time2 - time1;
118
119 sleep(2);
120 printf("thread_end %s, tid %lu\n",
121 "reader", urcu_get_thread_id());
122 return ((void*)1);
123
124 }
125
126 static
127 void *thr_writer(void *arg)
128 {
129 unsigned int i, j;
130 struct test_array *new, *old;
131 caa_cycles_t time1, time2;
132
133 printf("thread_begin %s, tid %lu\n",
134 "writer", urcu_get_thread_id());
135 sleep(2);
136
137 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
138 for (j = 0; j < INNER_WRITE_LOOP; j++) {
139 time1 = caa_get_cycles();
140 new = malloc(sizeof(struct test_array));
141 rcu_copy_mutex_lock();
142 old = test_rcu_pointer;
143 if (old) {
144 urcu_posix_assert(old->a == 8);
145 }
146 new->a = 8;
147 old = rcu_xchg_pointer(&test_rcu_pointer, new);
148 rcu_copy_mutex_unlock();
149 synchronize_rcu();
150 /* can be done after unlock */
151 if (old) {
152 old->a = 0;
153 }
154 free(old);
155 time2 = caa_get_cycles();
156 writer_time[(unsigned long)arg] += time2 - time1;
157 usleep(1);
158 }
159 }
160
161 printf("thread_end %s, tid %lu\n",
162 "writer", urcu_get_thread_id());
163 return ((void*)2);
164 }
165
166 int main(int argc, char **argv)
167 {
168 int err;
169 pthread_t *tid_reader, *tid_writer;
170 void *tret;
171 int i;
172 caa_cycles_t tot_rtime = 0;
173 caa_cycles_t tot_wtime = 0;
174
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
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));
186
187 printf("thread %-6s, tid %lu\n",
188 "main", urcu_get_thread_id());
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++) {
197 err = pthread_create(&tid_writer[i], NULL, thr_writer,
198 (void *)(long)i);
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);
209 tot_rtime += reader_time[i];
210 }
211 for (i = 0; i < NR_WRITE; i++) {
212 err = pthread_join(tid_writer[i], &tret);
213 if (err != 0)
214 exit(1);
215 tot_wtime += writer_time[i];
216 }
217 free(test_rcu_pointer);
218 printf("Time per read : %g cycles\n",
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));
222
223 free(reader_time);
224 free(writer_time);
225 free(tid_reader);
226 free(tid_writer);
227
228 return 0;
229 }
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