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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 | ||
45 | pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; | |
46 | ||
47 | static struct test_array test_array = { 8 }; | |
48 | ||
49 | #define OUTER_READ_LOOP 200U | |
50 | #define INNER_READ_LOOP 100000U | |
51 | #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP) | |
52 | ||
102d1d23 MD |
53 | #define OUTER_WRITE_LOOP 10U |
54 | #define INNER_WRITE_LOOP 200U | |
55 | #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP) | |
20bf310a | 56 | |
2c9689fe MD |
57 | static int num_read; |
58 | static int num_write; | |
20bf310a | 59 | |
2c9689fe MD |
60 | #define NR_READ num_read |
61 | #define NR_WRITE num_write | |
62 | ||
3fa18286 MD |
63 | static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time; |
64 | static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time; | |
20bf310a MD |
65 | |
66 | void *thr_reader(void *arg) | |
67 | { | |
68 | int i, j; | |
3fa18286 | 69 | caa_cycles_t time1, time2; |
20bf310a | 70 | |
94df6318 MD |
71 | printf("thread_begin %s, tid %lu\n", |
72 | "reader", urcu_get_thread_id()); | |
20bf310a MD |
73 | sleep(2); |
74 | ||
06f22bdb | 75 | time1 = caa_get_cycles(); |
20bf310a MD |
76 | for (i = 0; i < OUTER_READ_LOOP; i++) { |
77 | for (j = 0; j < INNER_READ_LOOP; j++) { | |
78 | pthread_rwlock_rdlock(&lock); | |
79 | assert(test_array.a == 8); | |
80 | pthread_rwlock_unlock(&lock); | |
81 | } | |
82 | } | |
06f22bdb | 83 | time2 = caa_get_cycles(); |
20bf310a MD |
84 | |
85 | reader_time[(unsigned long)arg] = time2 - time1; | |
86 | ||
87 | sleep(2); | |
94df6318 MD |
88 | printf("thread_end %s, tid %lu\n", |
89 | "reader", urcu_get_thread_id()); | |
20bf310a MD |
90 | return ((void*)1); |
91 | ||
92 | } | |
93 | ||
94 | void *thr_writer(void *arg) | |
95 | { | |
102d1d23 | 96 | int i, j; |
3fa18286 | 97 | caa_cycles_t time1, time2; |
20bf310a | 98 | |
94df6318 MD |
99 | printf("thread_begin %s, tid %lu\n", |
100 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
101 | sleep(2); |
102 | ||
102d1d23 MD |
103 | for (i = 0; i < OUTER_WRITE_LOOP; i++) { |
104 | for (j = 0; j < INNER_WRITE_LOOP; j++) { | |
06f22bdb | 105 | time1 = caa_get_cycles(); |
102d1d23 MD |
106 | pthread_rwlock_wrlock(&lock); |
107 | test_array.a = 8; | |
108 | pthread_rwlock_unlock(&lock); | |
06f22bdb | 109 | time2 = caa_get_cycles(); |
102d1d23 MD |
110 | writer_time[(unsigned long)arg] += time2 - time1; |
111 | usleep(1); | |
112 | } | |
20bf310a MD |
113 | } |
114 | ||
94df6318 MD |
115 | printf("thread_end %s, tid %lu\n", |
116 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
117 | return ((void*)2); |
118 | } | |
119 | ||
2c9689fe | 120 | int main(int argc, char **argv) |
20bf310a MD |
121 | { |
122 | int err; | |
2c9689fe | 123 | pthread_t *tid_reader, *tid_writer; |
20bf310a MD |
124 | void *tret; |
125 | int i; | |
3fa18286 MD |
126 | caa_cycles_t tot_rtime = 0; |
127 | caa_cycles_t tot_wtime = 0; | |
20bf310a | 128 | |
2c9689fe MD |
129 | if (argc < 2) { |
130 | printf("Usage : %s nr_readers nr_writers\n", argv[0]); | |
131 | exit(-1); | |
132 | } | |
133 | num_read = atoi(argv[1]); | |
134 | num_write = atoi(argv[2]); | |
135 | ||
9aa14175 MD |
136 | reader_time = calloc(num_read, sizeof(*reader_time)); |
137 | writer_time = calloc(num_write, sizeof(*writer_time)); | |
138 | tid_reader = calloc(num_read, sizeof(*tid_reader)); | |
139 | tid_writer = calloc(num_write, sizeof(*tid_writer)); | |
2c9689fe | 140 | |
94df6318 MD |
141 | printf("thread %-6s, tid %lu\n", |
142 | "main", urcu_get_thread_id()); | |
20bf310a MD |
143 | |
144 | for (i = 0; i < NR_READ; i++) { | |
145 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
146 | (void *)(long)i); | |
147 | if (err != 0) | |
148 | exit(1); | |
149 | } | |
150 | for (i = 0; i < NR_WRITE; i++) { | |
102d1d23 MD |
151 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
152 | (void *)(long)i); | |
20bf310a MD |
153 | if (err != 0) |
154 | exit(1); | |
155 | } | |
156 | ||
157 | sleep(10); | |
158 | ||
159 | for (i = 0; i < NR_READ; i++) { | |
160 | err = pthread_join(tid_reader[i], &tret); | |
161 | if (err != 0) | |
162 | exit(1); | |
102d1d23 | 163 | tot_rtime += reader_time[i]; |
20bf310a MD |
164 | } |
165 | for (i = 0; i < NR_WRITE; i++) { | |
166 | err = pthread_join(tid_writer[i], &tret); | |
167 | if (err != 0) | |
168 | exit(1); | |
102d1d23 | 169 | tot_wtime += writer_time[i]; |
20bf310a MD |
170 | } |
171 | printf("Time per read : %g cycles\n", | |
102d1d23 MD |
172 | (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP)); |
173 | printf("Time per write : %g cycles\n", | |
174 | (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP)); | |
20bf310a | 175 | |
2c9689fe MD |
176 | free(reader_time); |
177 | free(writer_time); | |
178 | free(tid_reader); | |
179 | free(tid_writer); | |
180 | ||
20bf310a MD |
181 | return 0; |
182 | } |