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ce29b371 MJ |
1 | // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2 | // | |
3 | // SPDX-License-Identifier: GPL-2.0-or-later | |
4 | ||
20bf310a | 5 | /* |
20bf310a | 6 | * Userspace RCU library - test program |
20bf310a MD |
7 | */ |
8 | ||
9 | #include <stdio.h> | |
10 | #include <pthread.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/types.h> | |
14 | #include <sys/wait.h> | |
15 | #include <unistd.h> | |
16 | #include <stdio.h> | |
20bf310a | 17 | #include <pthread.h> |
94b343fd PM |
18 | #include <errno.h> |
19 | ||
ec4e58a3 | 20 | #include <urcu/arch.h> |
01477510 | 21 | #include <urcu/assert.h> |
20bf310a | 22 | |
94df6318 | 23 | #include "thread-id.h" |
20bf310a | 24 | |
ec4e58a3 | 25 | #include <urcu.h> |
20bf310a MD |
26 | |
27 | struct test_array { | |
28 | int a; | |
29 | }; | |
30 | ||
89a6a9ce MJ |
31 | /* |
32 | * static rwlock initializer is broken on Cygwin. Use runtime | |
33 | * initialization. | |
34 | */ | |
35 | pthread_rwlock_t lock; | |
20bf310a MD |
36 | |
37 | static struct test_array test_array = { 8 }; | |
38 | ||
39 | #define OUTER_READ_LOOP 200U | |
40 | #define INNER_READ_LOOP 100000U | |
41 | #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP) | |
42 | ||
102d1d23 MD |
43 | #define OUTER_WRITE_LOOP 10U |
44 | #define INNER_WRITE_LOOP 200U | |
45 | #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP) | |
20bf310a | 46 | |
2c9689fe MD |
47 | static int num_read; |
48 | static int num_write; | |
20bf310a | 49 | |
2c9689fe MD |
50 | #define NR_READ num_read |
51 | #define NR_WRITE num_write | |
52 | ||
3fa18286 MD |
53 | static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time; |
54 | static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time; | |
20bf310a | 55 | |
61c3fb60 | 56 | static |
20bf310a MD |
57 | void *thr_reader(void *arg) |
58 | { | |
83e334d0 MJ |
59 | unsigned int i, j; |
60 | int ret; | |
3fa18286 | 61 | caa_cycles_t time1, time2; |
20bf310a | 62 | |
94df6318 MD |
63 | printf("thread_begin %s, tid %lu\n", |
64 | "reader", urcu_get_thread_id()); | |
20bf310a MD |
65 | sleep(2); |
66 | ||
06f22bdb | 67 | time1 = caa_get_cycles(); |
20bf310a MD |
68 | for (i = 0; i < OUTER_READ_LOOP; i++) { |
69 | for (j = 0; j < INNER_READ_LOOP; j++) { | |
89a6a9ce MJ |
70 | ret = pthread_rwlock_rdlock(&lock); |
71 | if (ret) { | |
72 | fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret)); | |
73 | abort(); | |
74 | } | |
75 | ||
01477510 | 76 | urcu_posix_assert(test_array.a == 8); |
89a6a9ce MJ |
77 | |
78 | ret = pthread_rwlock_unlock(&lock); | |
79 | if (ret) { | |
80 | fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret)); | |
81 | abort(); | |
82 | } | |
20bf310a MD |
83 | } |
84 | } | |
06f22bdb | 85 | time2 = caa_get_cycles(); |
20bf310a MD |
86 | |
87 | reader_time[(unsigned long)arg] = time2 - time1; | |
88 | ||
89 | sleep(2); | |
94df6318 MD |
90 | printf("thread_end %s, tid %lu\n", |
91 | "reader", urcu_get_thread_id()); | |
20bf310a MD |
92 | return ((void*)1); |
93 | ||
94 | } | |
95 | ||
61c3fb60 | 96 | static |
20bf310a MD |
97 | void *thr_writer(void *arg) |
98 | { | |
83e334d0 MJ |
99 | unsigned int i, j; |
100 | int ret; | |
3fa18286 | 101 | caa_cycles_t time1, time2; |
20bf310a | 102 | |
94df6318 MD |
103 | printf("thread_begin %s, tid %lu\n", |
104 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
105 | sleep(2); |
106 | ||
102d1d23 MD |
107 | for (i = 0; i < OUTER_WRITE_LOOP; i++) { |
108 | for (j = 0; j < INNER_WRITE_LOOP; j++) { | |
06f22bdb | 109 | time1 = caa_get_cycles(); |
89a6a9ce MJ |
110 | ret = pthread_rwlock_wrlock(&lock); |
111 | if (ret) { | |
112 | fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret)); | |
113 | abort(); | |
114 | } | |
115 | ||
102d1d23 | 116 | test_array.a = 8; |
89a6a9ce MJ |
117 | |
118 | ret = pthread_rwlock_unlock(&lock); | |
119 | if (ret) { | |
120 | fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret)); | |
121 | abort(); | |
122 | } | |
123 | ||
06f22bdb | 124 | time2 = caa_get_cycles(); |
102d1d23 MD |
125 | writer_time[(unsigned long)arg] += time2 - time1; |
126 | usleep(1); | |
127 | } | |
20bf310a MD |
128 | } |
129 | ||
94df6318 MD |
130 | printf("thread_end %s, tid %lu\n", |
131 | "writer", urcu_get_thread_id()); | |
20bf310a MD |
132 | return ((void*)2); |
133 | } | |
134 | ||
2c9689fe | 135 | int main(int argc, char **argv) |
20bf310a MD |
136 | { |
137 | int err; | |
2c9689fe | 138 | pthread_t *tid_reader, *tid_writer; |
20bf310a MD |
139 | void *tret; |
140 | int i; | |
3fa18286 MD |
141 | caa_cycles_t tot_rtime = 0; |
142 | caa_cycles_t tot_wtime = 0; | |
20bf310a | 143 | |
2c9689fe MD |
144 | if (argc < 2) { |
145 | printf("Usage : %s nr_readers nr_writers\n", argv[0]); | |
146 | exit(-1); | |
147 | } | |
148 | num_read = atoi(argv[1]); | |
149 | num_write = atoi(argv[2]); | |
150 | ||
89a6a9ce MJ |
151 | err = pthread_rwlock_init(&lock, NULL); |
152 | if (err != 0) { | |
153 | fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err)); | |
154 | exit(1); | |
155 | } | |
156 | ||
9aa14175 MD |
157 | reader_time = calloc(num_read, sizeof(*reader_time)); |
158 | writer_time = calloc(num_write, sizeof(*writer_time)); | |
159 | tid_reader = calloc(num_read, sizeof(*tid_reader)); | |
160 | tid_writer = calloc(num_write, sizeof(*tid_writer)); | |
2c9689fe | 161 | |
94df6318 MD |
162 | printf("thread %-6s, tid %lu\n", |
163 | "main", urcu_get_thread_id()); | |
20bf310a MD |
164 | |
165 | for (i = 0; i < NR_READ; i++) { | |
166 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
167 | (void *)(long)i); | |
168 | if (err != 0) | |
169 | exit(1); | |
170 | } | |
171 | for (i = 0; i < NR_WRITE; i++) { | |
102d1d23 MD |
172 | err = pthread_create(&tid_writer[i], NULL, thr_writer, |
173 | (void *)(long)i); | |
20bf310a MD |
174 | if (err != 0) |
175 | exit(1); | |
176 | } | |
177 | ||
178 | sleep(10); | |
179 | ||
180 | for (i = 0; i < NR_READ; i++) { | |
181 | err = pthread_join(tid_reader[i], &tret); | |
182 | if (err != 0) | |
183 | exit(1); | |
102d1d23 | 184 | tot_rtime += reader_time[i]; |
20bf310a MD |
185 | } |
186 | for (i = 0; i < NR_WRITE; i++) { | |
187 | err = pthread_join(tid_writer[i], &tret); | |
188 | if (err != 0) | |
189 | exit(1); | |
102d1d23 | 190 | tot_wtime += writer_time[i]; |
20bf310a MD |
191 | } |
192 | printf("Time per read : %g cycles\n", | |
102d1d23 MD |
193 | (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP)); |
194 | printf("Time per write : %g cycles\n", | |
195 | (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP)); | |
20bf310a | 196 | |
89a6a9ce MJ |
197 | err = pthread_rwlock_destroy(&lock); |
198 | if (err != 0) { | |
199 | fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err)); | |
200 | exit(1); | |
201 | } | |
2c9689fe MD |
202 | free(reader_time); |
203 | free(writer_time); | |
204 | free(tid_reader); | |
205 | free(tid_writer); | |
206 | ||
20bf310a MD |
207 | return 0; |
208 | } |