cleanup: all functions have declarations (-Wmissing-prototypes)
[urcu.git] / tests / benchmark / test_perthreadlock_timing.c
1 /*
2 * test_perthreadloc_timing.c
3 *
4 * Per thread locks - 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 <assert.h>
32 #include <pthread.h>
33 #include <errno.h>
34
35 #include <urcu/arch.h>
36
37 #include "thread-id.h"
38
39 #include <urcu.h>
40
41 struct test_array {
42 int a;
43 };
44
45 static struct test_array test_array = { 8 };
46
47 struct per_thread_lock {
48 pthread_mutex_t lock;
49 } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
50
51 static struct per_thread_lock *per_thread_lock;
52
53 #define OUTER_READ_LOOP 200U
54 #define INNER_READ_LOOP 100000U
55 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
56
57 #define OUTER_WRITE_LOOP 10U
58 #define INNER_WRITE_LOOP 200U
59 #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
60
61 static int num_read;
62 static int num_write;
63
64 #define NR_READ num_read
65 #define NR_WRITE num_write
66
67 static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
68 static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
69
70 static
71 void *thr_reader(void *arg)
72 {
73 caa_cycles_t time1, time2;
74 long tidx = (long)arg;
75 unsigned int i, j;
76 int ret;
77
78 printf("thread_begin %s, tid %lu\n",
79 "reader", urcu_get_thread_id());
80 sleep(2);
81
82 time1 = caa_get_cycles();
83 for (i = 0; i < OUTER_READ_LOOP; i++) {
84 for (j = 0; j < INNER_READ_LOOP; j++) {
85 ret = pthread_mutex_lock(&per_thread_lock[tidx].lock);
86 if (ret) {
87 perror("Error in pthread mutex lock");
88 exit(-1);
89 }
90 assert(test_array.a == 8);
91 ret = pthread_mutex_unlock(&per_thread_lock[tidx].lock);
92 if (ret) {
93 perror("Error in pthread mutex unlock");
94 exit(-1);
95 }
96 }
97 }
98 time2 = caa_get_cycles();
99
100 reader_time[tidx] = time2 - time1;
101
102 sleep(2);
103 printf("thread_end %s, tid %lu\n",
104 "reader", urcu_get_thread_id());
105 return ((void*)1);
106
107 }
108
109 static
110 void *thr_writer(void *arg)
111 {
112 caa_cycles_t time1, time2;
113 unsigned int i, j;
114 long tidx;
115 int ret;
116
117 printf("thread_begin %s, tid %lu\n",
118 "writer", urcu_get_thread_id());
119 sleep(2);
120
121 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
122 for (j = 0; j < INNER_WRITE_LOOP; j++) {
123 time1 = caa_get_cycles();
124 for (tidx = 0; tidx < NR_READ; tidx++) {
125 ret = pthread_mutex_lock(&per_thread_lock[tidx].lock);
126 if (ret) {
127 perror("Error in pthread mutex lock");
128 exit(-1);
129 }
130 }
131 test_array.a = 8;
132 for (tidx = NR_READ - 1; tidx >= 0; tidx--) {
133 ret = pthread_mutex_unlock(&per_thread_lock[tidx].lock);
134 if (ret) {
135 perror("Error in pthread mutex unlock");
136 exit(-1);
137 }
138 }
139 time2 = caa_get_cycles();
140 writer_time[(unsigned long)arg] += time2 - time1;
141 usleep(1);
142 }
143 }
144
145 printf("thread_end %s, tid %lu\n",
146 "writer", urcu_get_thread_id());
147 return ((void*)2);
148 }
149
150 int main(int argc, char **argv)
151 {
152 int err;
153 pthread_t *tid_reader, *tid_writer;
154 void *tret;
155 int i;
156 caa_cycles_t tot_rtime = 0;
157 caa_cycles_t tot_wtime = 0;
158
159 if (argc < 2) {
160 printf("Usage : %s nr_readers nr_writers\n", argv[0]);
161 exit(-1);
162 }
163 num_read = atoi(argv[1]);
164 num_write = atoi(argv[2]);
165
166 reader_time = calloc(num_read, sizeof(*reader_time));
167 writer_time = calloc(num_write, sizeof(*writer_time));
168 tid_reader = calloc(num_read, sizeof(*tid_reader));
169 tid_writer = calloc(num_write, sizeof(*tid_writer));
170
171 printf("thread %-6s, tid %lu\n",
172 "main", urcu_get_thread_id());
173
174 per_thread_lock = malloc(sizeof(struct per_thread_lock) * NR_READ);
175
176 for (i = 0; i < NR_READ; i++) {
177 pthread_mutex_init(&per_thread_lock[i].lock, NULL);
178 }
179 for (i = 0; i < NR_READ; i++) {
180 err = pthread_create(&tid_reader[i], NULL, thr_reader,
181 (void *)(long)i);
182 if (err != 0)
183 exit(1);
184 }
185 for (i = 0; i < NR_WRITE; i++) {
186 err = pthread_create(&tid_writer[i], NULL, thr_writer,
187 (void *)(long)i);
188 if (err != 0)
189 exit(1);
190 }
191
192 sleep(10);
193
194 for (i = 0; i < NR_READ; i++) {
195 err = pthread_join(tid_reader[i], &tret);
196 if (err != 0)
197 exit(1);
198 tot_rtime += reader_time[i];
199 }
200 for (i = 0; i < NR_WRITE; i++) {
201 err = pthread_join(tid_writer[i], &tret);
202 if (err != 0)
203 exit(1);
204 tot_wtime += writer_time[i];
205 }
206 printf("Time per read : %g cycles\n",
207 (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
208 printf("Time per write : %g cycles\n",
209 (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
210 free(per_thread_lock);
211
212 free(reader_time);
213 free(writer_time);
214 free(tid_reader);
215 free(tid_writer);
216
217 return 0;
218 }
This page took 0.049814 seconds and 4 git commands to generate.