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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 | ||
d8540fc5 | 23 | #define _GNU_SOURCE |
20bf310a MD |
24 | #include <stdio.h> |
25 | #include <pthread.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/wait.h> | |
30 | #include <unistd.h> | |
31 | #include <stdio.h> | |
32 | #include <assert.h> | |
20bf310a | 33 | #include <pthread.h> |
94b343fd PM |
34 | #include <errno.h> |
35 | ||
ec4e58a3 | 36 | #include <urcu/arch.h> |
20bf310a | 37 | |
94df6318 | 38 | #include "thread-id.h" |
20bf310a | 39 | |
ec4e58a3 | 40 | #include <urcu.h> |
20bf310a MD |
41 | |
42 | struct test_array { | |
43 | int a; | |
44 | }; | |
45 | ||
ff981126 MJ |
46 | /* |
47 | * static rwlock initializer is broken on Cygwin. Use runtime | |
48 | * initialization. | |
49 | */ | |
50 | pthread_rwlock_t lock; | |
20bf310a MD |
51 | |
52 | static struct test_array test_array = { 8 }; | |
53 | ||
54 | #define OUTER_READ_LOOP 200U | |
55 | #define INNER_READ_LOOP 100000U | |
56 | #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP) | |
57 | ||
102d1d23 MD |
58 | #define OUTER_WRITE_LOOP 10U |
59 | #define INNER_WRITE_LOOP 200U | |
60 | #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP) | |
20bf310a | 61 | |
2c9689fe MD |
62 | static int num_read; |
63 | static int num_write; | |
20bf310a | 64 | |
2c9689fe MD |
65 | #define NR_READ num_read |
66 | #define NR_WRITE num_write | |
67 | ||
3fa18286 MD |
68 | static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time; |
69 | static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time; | |
20bf310a MD |
70 | |
71 | void *thr_reader(void *arg) | |
72 | { | |
ff981126 | 73 | int i, j, 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++) { | |
ff981126 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); |
ff981126 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 | { | |
ff981126 | 111 | int i, j, ret; |
3fa18286 | 112 | caa_cycles_t time1, time2; |
20bf310a | 113 | |
94df6318 MD |
114 | printf("thread_begin %s, tid %lu\n", |
115 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
116 | sleep(2); |
117 | ||
102d1d23 MD |
118 | for (i = 0; i < OUTER_WRITE_LOOP; i++) { |
119 | for (j = 0; j < INNER_WRITE_LOOP; j++) { | |
06f22bdb | 120 | time1 = caa_get_cycles(); |
ff981126 MJ |
121 | ret = pthread_rwlock_wrlock(&lock); |
122 | if (ret) { | |
123 | fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret)); | |
124 | abort(); | |
125 | } | |
126 | ||
102d1d23 | 127 | test_array.a = 8; |
ff981126 MJ |
128 | |
129 | ret = pthread_rwlock_unlock(&lock); | |
130 | if (ret) { | |
131 | fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret)); | |
132 | abort(); | |
133 | } | |
134 | ||
06f22bdb | 135 | time2 = caa_get_cycles(); |
102d1d23 MD |
136 | writer_time[(unsigned long)arg] += time2 - time1; |
137 | usleep(1); | |
138 | } | |
20bf310a MD |
139 | } |
140 | ||
94df6318 MD |
141 | printf("thread_end %s, tid %lu\n", |
142 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
143 | return ((void*)2); |
144 | } | |
145 | ||
2c9689fe | 146 | int main(int argc, char **argv) |
20bf310a MD |
147 | { |
148 | int err; | |
2c9689fe | 149 | pthread_t *tid_reader, *tid_writer; |
20bf310a MD |
150 | void *tret; |
151 | int i; | |
3fa18286 MD |
152 | caa_cycles_t tot_rtime = 0; |
153 | caa_cycles_t tot_wtime = 0; | |
20bf310a | 154 | |
2c9689fe MD |
155 | if (argc < 2) { |
156 | printf("Usage : %s nr_readers nr_writers\n", argv[0]); | |
157 | exit(-1); | |
158 | } | |
159 | num_read = atoi(argv[1]); | |
160 | num_write = atoi(argv[2]); | |
161 | ||
ff981126 MJ |
162 | err = pthread_rwlock_init(&lock, NULL); |
163 | if (err != 0) { | |
164 | fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err)); | |
165 | exit(1); | |
166 | } | |
167 | ||
9aa14175 MD |
168 | reader_time = calloc(num_read, sizeof(*reader_time)); |
169 | writer_time = calloc(num_write, sizeof(*writer_time)); | |
170 | tid_reader = calloc(num_read, sizeof(*tid_reader)); | |
171 | tid_writer = calloc(num_write, sizeof(*tid_writer)); | |
2c9689fe | 172 | |
94df6318 MD |
173 | printf("thread %-6s, tid %lu\n", |
174 | "main", urcu_get_thread_id()); | |
20bf310a MD |
175 | |
176 | for (i = 0; i < NR_READ; i++) { | |
177 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
178 | (void *)(long)i); | |
179 | if (err != 0) | |
180 | exit(1); | |
181 | } | |
182 | for (i = 0; i < NR_WRITE; i++) { | |
102d1d23 MD |
183 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
184 | (void *)(long)i); | |
20bf310a MD |
185 | if (err != 0) |
186 | exit(1); | |
187 | } | |
188 | ||
189 | sleep(10); | |
190 | ||
191 | for (i = 0; i < NR_READ; i++) { | |
192 | err = pthread_join(tid_reader[i], &tret); | |
193 | if (err != 0) | |
194 | exit(1); | |
102d1d23 | 195 | tot_rtime += reader_time[i]; |
20bf310a MD |
196 | } |
197 | for (i = 0; i < NR_WRITE; i++) { | |
198 | err = pthread_join(tid_writer[i], &tret); | |
199 | if (err != 0) | |
200 | exit(1); | |
102d1d23 | 201 | tot_wtime += writer_time[i]; |
20bf310a MD |
202 | } |
203 | printf("Time per read : %g cycles\n", | |
102d1d23 MD |
204 | (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP)); |
205 | printf("Time per write : %g cycles\n", | |
206 | (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP)); | |
20bf310a | 207 | |
ff981126 MJ |
208 | err = pthread_rwlock_destroy(&lock); |
209 | if (err != 0) { | |
210 | fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err)); | |
211 | exit(1); | |
212 | } | |
2c9689fe MD |
213 | free(reader_time); |
214 | free(writer_time); | |
215 | free(tid_reader); | |
216 | free(tid_writer); | |
217 | ||
20bf310a MD |
218 | return 0; |
219 | } |