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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 | ||
102d1d23 MD |
65 | #define OUTER_WRITE_LOOP 10U |
66 | #define INNER_WRITE_LOOP 200U | |
67 | #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP) | |
20bf310a MD |
68 | |
69 | #define NR_READ 10 | |
70 | #define NR_WRITE 9 | |
71 | ||
72 | static cycles_t reader_time[NR_READ] __attribute__((aligned(128))); | |
102d1d23 | 73 | static cycles_t writer_time[NR_WRITE] __attribute__((aligned(128))); |
20bf310a MD |
74 | |
75 | void *thr_reader(void *arg) | |
76 | { | |
77 | int i, j; | |
78 | cycles_t time1, time2; | |
79 | ||
80 | printf("thread_begin %s, thread id : %lx, tid %lu\n", | |
81 | "reader", pthread_self(), (unsigned long)gettid()); | |
82 | sleep(2); | |
83 | ||
84 | time1 = get_cycles(); | |
85 | for (i = 0; i < OUTER_READ_LOOP; i++) { | |
86 | for (j = 0; j < INNER_READ_LOOP; j++) { | |
87 | pthread_rwlock_rdlock(&lock); | |
88 | assert(test_array.a == 8); | |
89 | pthread_rwlock_unlock(&lock); | |
90 | } | |
91 | } | |
92 | time2 = get_cycles(); | |
93 | ||
94 | reader_time[(unsigned long)arg] = time2 - time1; | |
95 | ||
96 | sleep(2); | |
97 | printf("thread_end %s, thread id : %lx, tid %lu\n", | |
98 | "reader", pthread_self(), (unsigned long)gettid()); | |
99 | return ((void*)1); | |
100 | ||
101 | } | |
102 | ||
103 | void *thr_writer(void *arg) | |
104 | { | |
102d1d23 MD |
105 | int i, j; |
106 | cycles_t time1, time2; | |
20bf310a MD |
107 | |
108 | printf("thread_begin %s, thread id : %lx, tid %lu\n", | |
109 | "writer", pthread_self(), (unsigned long)gettid()); | |
110 | sleep(2); | |
111 | ||
102d1d23 MD |
112 | for (i = 0; i < OUTER_WRITE_LOOP; i++) { |
113 | for (j = 0; j < INNER_WRITE_LOOP; j++) { | |
114 | time1 = get_cycles(); | |
115 | pthread_rwlock_wrlock(&lock); | |
116 | test_array.a = 8; | |
117 | pthread_rwlock_unlock(&lock); | |
118 | time2 = get_cycles(); | |
119 | writer_time[(unsigned long)arg] += time2 - time1; | |
120 | usleep(1); | |
121 | } | |
20bf310a MD |
122 | } |
123 | ||
124 | printf("thread_end %s, thread id : %lx, tid %lu\n", | |
125 | "writer", pthread_self(), (unsigned long)gettid()); | |
126 | return ((void*)2); | |
127 | } | |
128 | ||
129 | int main() | |
130 | { | |
131 | int err; | |
132 | pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE]; | |
133 | void *tret; | |
134 | int i; | |
102d1d23 MD |
135 | cycles_t tot_rtime = 0; |
136 | cycles_t tot_wtime = 0; | |
20bf310a MD |
137 | |
138 | printf("thread %-6s, thread id : %lx, tid %lu\n", | |
139 | "main", pthread_self(), (unsigned long)gettid()); | |
140 | ||
141 | for (i = 0; i < NR_READ; i++) { | |
142 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
143 | (void *)(long)i); | |
144 | if (err != 0) | |
145 | exit(1); | |
146 | } | |
147 | for (i = 0; i < NR_WRITE; i++) { | |
102d1d23 MD |
148 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
149 | (void *)(long)i); | |
20bf310a MD |
150 | if (err != 0) |
151 | exit(1); | |
152 | } | |
153 | ||
154 | sleep(10); | |
155 | ||
156 | for (i = 0; i < NR_READ; i++) { | |
157 | err = pthread_join(tid_reader[i], &tret); | |
158 | if (err != 0) | |
159 | exit(1); | |
102d1d23 | 160 | tot_rtime += reader_time[i]; |
20bf310a MD |
161 | } |
162 | for (i = 0; i < NR_WRITE; i++) { | |
163 | err = pthread_join(tid_writer[i], &tret); | |
164 | if (err != 0) | |
165 | exit(1); | |
102d1d23 | 166 | tot_wtime += writer_time[i]; |
20bf310a MD |
167 | } |
168 | printf("Time per read : %g cycles\n", | |
102d1d23 MD |
169 | (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP)); |
170 | printf("Time per write : %g cycles\n", | |
171 | (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP)); | |
20bf310a MD |
172 | |
173 | return 0; | |
174 | } |