Add missing urcu-defer.{so,h} and urcu-defer-static.h
[urcu.git] / tests / test_urcu_timing.c
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 #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>
32 #include <sys/syscall.h>
33 #include "../arch.h"
34
35 /* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
36 #define CACHE_LINE_SIZE 4096
37
38 #if defined(_syscall0)
39 _syscall0(pid_t, gettid)
40 #elif defined(__NR_gettid)
41 static inline pid_t gettid(void)
42 {
43 return syscall(__NR_gettid);
44 }
45 #else
46 #warning "use pid as tid"
47 static inline pid_t gettid(void)
48 {
49 return getpid();
50 }
51 #endif
52
53 #define _LGPL_SOURCE
54 #include "../urcu.h"
55
56 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
57
58 void rcu_copy_mutex_lock(void)
59 {
60 int ret;
61 ret = pthread_mutex_lock(&rcu_copy_mutex);
62 if (ret) {
63 perror("Error in pthread mutex lock");
64 exit(-1);
65 }
66 }
67
68 void rcu_copy_mutex_unlock(void)
69 {
70 int ret;
71
72 ret = pthread_mutex_unlock(&rcu_copy_mutex);
73 if (ret) {
74 perror("Error in pthread mutex unlock");
75 exit(-1);
76 }
77 }
78
79 struct test_array {
80 int a;
81 };
82
83 static struct test_array *test_rcu_pointer;
84
85 #define OUTER_READ_LOOP 2000U
86 #define INNER_READ_LOOP 100000U
87 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
88
89 #define OUTER_WRITE_LOOP 10U
90 #define INNER_WRITE_LOOP 200U
91 #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
92
93 static int num_read;
94 static int num_write;
95
96 #define NR_READ num_read
97 #define NR_WRITE num_write
98
99 static cycles_t __attribute__((aligned(CACHE_LINE_SIZE))) *reader_time;
100 static cycles_t __attribute__((aligned(CACHE_LINE_SIZE))) *writer_time;
101
102 void *thr_reader(void *arg)
103 {
104 int i, j;
105 struct test_array *local_ptr;
106 cycles_t time1, time2;
107
108 printf("thread_begin %s, thread id : %lx, tid %lu\n",
109 "reader", pthread_self(), (unsigned long)gettid());
110 sleep(2);
111
112 rcu_register_thread();
113
114 time1 = get_cycles();
115 for (i = 0; i < OUTER_READ_LOOP; i++) {
116 for (j = 0; j < INNER_READ_LOOP; j++) {
117 rcu_read_lock();
118 local_ptr = rcu_dereference(test_rcu_pointer);
119 if (local_ptr) {
120 assert(local_ptr->a == 8);
121 }
122 rcu_read_unlock();
123 }
124 }
125 time2 = get_cycles();
126
127 rcu_unregister_thread();
128
129 reader_time[(unsigned long)arg] = time2 - time1;
130
131 sleep(2);
132 printf("thread_end %s, thread id : %lx, tid %lu\n",
133 "reader", pthread_self(), (unsigned long)gettid());
134 return ((void*)1);
135
136 }
137
138 void *thr_writer(void *arg)
139 {
140 int i, j;
141 struct test_array *new, *old;
142 cycles_t time1, time2;
143
144 printf("thread_begin %s, thread id : %lx, tid %lu\n",
145 "writer", pthread_self(), (unsigned long)gettid());
146 sleep(2);
147
148 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
149 for (j = 0; j < INNER_WRITE_LOOP; j++) {
150 time1 = get_cycles();
151 new = malloc(sizeof(struct test_array));
152 rcu_copy_mutex_lock();
153 old = test_rcu_pointer;
154 if (old) {
155 assert(old->a == 8);
156 }
157 new->a = 8;
158 old = rcu_publish_content(&test_rcu_pointer, new);
159 rcu_copy_mutex_unlock();
160 /* can be done after unlock */
161 if (old) {
162 old->a = 0;
163 }
164 free(old);
165 time2 = get_cycles();
166 writer_time[(unsigned long)arg] += time2 - time1;
167 usleep(1);
168 }
169 }
170
171 printf("thread_end %s, thread id : %lx, tid %lu\n",
172 "writer", pthread_self(), (unsigned long)gettid());
173 return ((void*)2);
174 }
175
176 int main(int argc, char **argv)
177 {
178 int err;
179 pthread_t *tid_reader, *tid_writer;
180 void *tret;
181 int i;
182 cycles_t tot_rtime = 0;
183 cycles_t tot_wtime = 0;
184
185 if (argc < 2) {
186 printf("Usage : %s nr_readers nr_writers\n", argv[0]);
187 exit(-1);
188 }
189 num_read = atoi(argv[1]);
190 num_write = atoi(argv[2]);
191
192 reader_time = malloc(sizeof(*reader_time) * num_read);
193 writer_time = malloc(sizeof(*writer_time) * num_write);
194 tid_reader = malloc(sizeof(*tid_reader) * num_read);
195 tid_writer = malloc(sizeof(*tid_writer) * num_write);
196
197 printf("thread %-6s, thread id : %lx, tid %lu\n",
198 "main", pthread_self(), (unsigned long)gettid());
199
200 for (i = 0; i < NR_READ; i++) {
201 err = pthread_create(&tid_reader[i], NULL, thr_reader,
202 (void *)(long)i);
203 if (err != 0)
204 exit(1);
205 }
206 for (i = 0; i < NR_WRITE; i++) {
207 err = pthread_create(&tid_writer[i], NULL, thr_writer,
208 (void *)(long)i);
209 if (err != 0)
210 exit(1);
211 }
212
213 sleep(10);
214
215 for (i = 0; i < NR_READ; i++) {
216 err = pthread_join(tid_reader[i], &tret);
217 if (err != 0)
218 exit(1);
219 tot_rtime += reader_time[i];
220 }
221 for (i = 0; i < NR_WRITE; i++) {
222 err = pthread_join(tid_writer[i], &tret);
223 if (err != 0)
224 exit(1);
225 tot_wtime += writer_time[i];
226 }
227 free(test_rcu_pointer);
228 printf("Time per read : %g cycles\n",
229 (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
230 printf("Time per write : %g cycles\n",
231 (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
232
233 free(reader_time);
234 free(writer_time);
235 free(tid_reader);
236 free(tid_writer);
237
238 return 0;
239 }
This page took 0.03552 seconds and 5 git commands to generate.