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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> | |
31 | #include <assert.h> | |
20bf310a | 32 | #include <pthread.h> |
94b343fd PM |
33 | #include <errno.h> |
34 | ||
ec4e58a3 | 35 | #include <urcu/arch.h> |
20bf310a | 36 | |
94df6318 | 37 | #include "thread-id.h" |
20bf310a | 38 | |
ec4e58a3 | 39 | #include <urcu.h> |
20bf310a MD |
40 | |
41 | struct test_array { | |
42 | int a; | |
43 | }; | |
44 | ||
89a6a9ce MJ |
45 | /* |
46 | * static rwlock initializer is broken on Cygwin. Use runtime | |
47 | * initialization. | |
48 | */ | |
49 | pthread_rwlock_t lock; | |
20bf310a MD |
50 | |
51 | static struct test_array test_array = { 8 }; | |
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 | ||
102d1d23 MD |
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) | |
20bf310a | 60 | |
2c9689fe MD |
61 | static int num_read; |
62 | static int num_write; | |
20bf310a | 63 | |
2c9689fe MD |
64 | #define NR_READ num_read |
65 | #define NR_WRITE num_write | |
66 | ||
3fa18286 MD |
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; | |
20bf310a MD |
69 | |
70 | void *thr_reader(void *arg) | |
71 | { | |
83e334d0 MJ |
72 | unsigned int i, j; |
73 | int ret; | |
3fa18286 | 74 | caa_cycles_t time1, time2; |
20bf310a | 75 | |
94df6318 MD |
76 | printf("thread_begin %s, tid %lu\n", |
77 | "reader", urcu_get_thread_id()); | |
20bf310a MD |
78 | sleep(2); |
79 | ||
06f22bdb | 80 | time1 = caa_get_cycles(); |
20bf310a MD |
81 | for (i = 0; i < OUTER_READ_LOOP; i++) { |
82 | for (j = 0; j < INNER_READ_LOOP; j++) { | |
89a6a9ce MJ |
83 | ret = pthread_rwlock_rdlock(&lock); |
84 | if (ret) { | |
85 | fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret)); | |
86 | abort(); | |
87 | } | |
88 | ||
20bf310a | 89 | assert(test_array.a == 8); |
89a6a9ce MJ |
90 | |
91 | ret = pthread_rwlock_unlock(&lock); | |
92 | if (ret) { | |
93 | fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret)); | |
94 | abort(); | |
95 | } | |
20bf310a MD |
96 | } |
97 | } | |
06f22bdb | 98 | time2 = caa_get_cycles(); |
20bf310a MD |
99 | |
100 | reader_time[(unsigned long)arg] = time2 - time1; | |
101 | ||
102 | sleep(2); | |
94df6318 MD |
103 | printf("thread_end %s, tid %lu\n", |
104 | "reader", urcu_get_thread_id()); | |
20bf310a MD |
105 | return ((void*)1); |
106 | ||
107 | } | |
108 | ||
109 | void *thr_writer(void *arg) | |
110 | { | |
83e334d0 MJ |
111 | unsigned int i, j; |
112 | int ret; | |
3fa18286 | 113 | caa_cycles_t time1, time2; |
20bf310a | 114 | |
94df6318 MD |
115 | printf("thread_begin %s, tid %lu\n", |
116 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
117 | sleep(2); |
118 | ||
102d1d23 MD |
119 | for (i = 0; i < OUTER_WRITE_LOOP; i++) { |
120 | for (j = 0; j < INNER_WRITE_LOOP; j++) { | |
06f22bdb | 121 | time1 = caa_get_cycles(); |
89a6a9ce MJ |
122 | ret = pthread_rwlock_wrlock(&lock); |
123 | if (ret) { | |
124 | fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret)); | |
125 | abort(); | |
126 | } | |
127 | ||
102d1d23 | 128 | test_array.a = 8; |
89a6a9ce MJ |
129 | |
130 | ret = pthread_rwlock_unlock(&lock); | |
131 | if (ret) { | |
132 | fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret)); | |
133 | abort(); | |
134 | } | |
135 | ||
06f22bdb | 136 | time2 = caa_get_cycles(); |
102d1d23 MD |
137 | writer_time[(unsigned long)arg] += time2 - time1; |
138 | usleep(1); | |
139 | } | |
20bf310a MD |
140 | } |
141 | ||
94df6318 MD |
142 | printf("thread_end %s, tid %lu\n", |
143 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
144 | return ((void*)2); |
145 | } | |
146 | ||
2c9689fe | 147 | int main(int argc, char **argv) |
20bf310a MD |
148 | { |
149 | int err; | |
2c9689fe | 150 | pthread_t *tid_reader, *tid_writer; |
20bf310a MD |
151 | void *tret; |
152 | int i; | |
3fa18286 MD |
153 | caa_cycles_t tot_rtime = 0; |
154 | caa_cycles_t tot_wtime = 0; | |
20bf310a | 155 | |
2c9689fe MD |
156 | if (argc < 2) { |
157 | printf("Usage : %s nr_readers nr_writers\n", argv[0]); | |
158 | exit(-1); | |
159 | } | |
160 | num_read = atoi(argv[1]); | |
161 | num_write = atoi(argv[2]); | |
162 | ||
89a6a9ce MJ |
163 | err = pthread_rwlock_init(&lock, NULL); |
164 | if (err != 0) { | |
165 | fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err)); | |
166 | exit(1); | |
167 | } | |
168 | ||
9aa14175 MD |
169 | reader_time = calloc(num_read, sizeof(*reader_time)); |
170 | writer_time = calloc(num_write, sizeof(*writer_time)); | |
171 | tid_reader = calloc(num_read, sizeof(*tid_reader)); | |
172 | tid_writer = calloc(num_write, sizeof(*tid_writer)); | |
2c9689fe | 173 | |
94df6318 MD |
174 | printf("thread %-6s, tid %lu\n", |
175 | "main", urcu_get_thread_id()); | |
20bf310a MD |
176 | |
177 | for (i = 0; i < NR_READ; i++) { | |
178 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
179 | (void *)(long)i); | |
180 | if (err != 0) | |
181 | exit(1); | |
182 | } | |
183 | for (i = 0; i < NR_WRITE; i++) { | |
102d1d23 MD |
184 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
185 | (void *)(long)i); | |
20bf310a MD |
186 | if (err != 0) |
187 | exit(1); | |
188 | } | |
189 | ||
190 | sleep(10); | |
191 | ||
192 | for (i = 0; i < NR_READ; i++) { | |
193 | err = pthread_join(tid_reader[i], &tret); | |
194 | if (err != 0) | |
195 | exit(1); | |
102d1d23 | 196 | tot_rtime += reader_time[i]; |
20bf310a MD |
197 | } |
198 | for (i = 0; i < NR_WRITE; i++) { | |
199 | err = pthread_join(tid_writer[i], &tret); | |
200 | if (err != 0) | |
201 | exit(1); | |
102d1d23 | 202 | tot_wtime += writer_time[i]; |
20bf310a MD |
203 | } |
204 | printf("Time per read : %g cycles\n", | |
102d1d23 MD |
205 | (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP)); |
206 | printf("Time per write : %g cycles\n", | |
207 | (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP)); | |
20bf310a | 208 | |
89a6a9ce MJ |
209 | err = pthread_rwlock_destroy(&lock); |
210 | if (err != 0) { | |
211 | fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err)); | |
212 | exit(1); | |
213 | } | |
2c9689fe MD |
214 | free(reader_time); |
215 | free(writer_time); | |
216 | free(tid_reader); | |
217 | free(tid_writer); | |
218 | ||
20bf310a MD |
219 | return 0; |
220 | } |