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20bf310a MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
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> | |
32 | #include <sys/syscall.h> | |
33 | #include <pthread.h> | |
121a5d44 | 34 | #include <arch.h> |
20bf310a MD |
35 | |
36 | #if defined(_syscall0) | |
37 | _syscall0(pid_t, gettid) | |
38 | #elif defined(__NR_gettid) | |
39 | static inline pid_t gettid(void) | |
40 | { | |
41 | return syscall(__NR_gettid); | |
42 | } | |
43 | #else | |
44 | #warning "use pid as tid" | |
45 | static inline pid_t gettid(void) | |
46 | { | |
47 | return getpid(); | |
48 | } | |
49 | #endif | |
50 | ||
20bf310a MD |
51 | #include "urcu.h" |
52 | ||
53 | struct test_array { | |
54 | int a; | |
55 | }; | |
56 | ||
57 | pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER; | |
58 | ||
59 | static struct test_array test_array = { 8 }; | |
60 | ||
61 | #define OUTER_READ_LOOP 200U | |
62 | #define INNER_READ_LOOP 100000U | |
63 | #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP) | |
64 | ||
65 | #define WRITE_LOOP 2000U | |
66 | ||
67 | #define NR_READ 10 | |
68 | #define NR_WRITE 9 | |
69 | ||
70 | static cycles_t reader_time[NR_READ] __attribute__((aligned(128))); | |
71 | ||
72 | void *thr_reader(void *arg) | |
73 | { | |
74 | int i, j; | |
75 | cycles_t time1, time2; | |
76 | ||
77 | printf("thread_begin %s, thread id : %lx, tid %lu\n", | |
78 | "reader", pthread_self(), (unsigned long)gettid()); | |
79 | sleep(2); | |
80 | ||
81 | time1 = get_cycles(); | |
82 | for (i = 0; i < OUTER_READ_LOOP; i++) { | |
83 | for (j = 0; j < INNER_READ_LOOP; j++) { | |
84 | pthread_rwlock_rdlock(&lock); | |
85 | assert(test_array.a == 8); | |
86 | pthread_rwlock_unlock(&lock); | |
87 | } | |
88 | } | |
89 | time2 = get_cycles(); | |
90 | ||
91 | reader_time[(unsigned long)arg] = time2 - time1; | |
92 | ||
93 | sleep(2); | |
94 | printf("thread_end %s, thread id : %lx, tid %lu\n", | |
95 | "reader", pthread_self(), (unsigned long)gettid()); | |
96 | return ((void*)1); | |
97 | ||
98 | } | |
99 | ||
100 | void *thr_writer(void *arg) | |
101 | { | |
102 | int i; | |
103 | ||
104 | printf("thread_begin %s, thread id : %lx, tid %lu\n", | |
105 | "writer", pthread_self(), (unsigned long)gettid()); | |
106 | sleep(2); | |
107 | ||
108 | for (i = 0; i < WRITE_LOOP; i++) { | |
109 | pthread_rwlock_wrlock(&lock); | |
110 | test_array.a = 8; | |
111 | pthread_rwlock_unlock(&lock); | |
112 | usleep(1); | |
113 | } | |
114 | ||
115 | printf("thread_end %s, thread id : %lx, tid %lu\n", | |
116 | "writer", pthread_self(), (unsigned long)gettid()); | |
117 | return ((void*)2); | |
118 | } | |
119 | ||
120 | int main() | |
121 | { | |
122 | int err; | |
123 | pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE]; | |
124 | void *tret; | |
125 | int i; | |
126 | cycles_t tot_time = 0; | |
127 | ||
128 | printf("thread %-6s, thread id : %lx, tid %lu\n", | |
129 | "main", pthread_self(), (unsigned long)gettid()); | |
130 | ||
131 | for (i = 0; i < NR_READ; i++) { | |
132 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
133 | (void *)(long)i); | |
134 | if (err != 0) | |
135 | exit(1); | |
136 | } | |
137 | for (i = 0; i < NR_WRITE; i++) { | |
138 | err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL); | |
139 | if (err != 0) | |
140 | exit(1); | |
141 | } | |
142 | ||
143 | sleep(10); | |
144 | ||
145 | for (i = 0; i < NR_READ; i++) { | |
146 | err = pthread_join(tid_reader[i], &tret); | |
147 | if (err != 0) | |
148 | exit(1); | |
149 | tot_time += reader_time[i]; | |
150 | } | |
151 | for (i = 0; i < NR_WRITE; i++) { | |
152 | err = pthread_join(tid_writer[i], &tret); | |
153 | if (err != 0) | |
154 | exit(1); | |
155 | } | |
156 | printf("Time per read : %g cycles\n", | |
157 | (double)tot_time / ((double)NR_READ * (double)READ_LOOP)); | |
158 | ||
159 | return 0; | |
160 | } |