compat_futex_async: fix missing return
[urcu.git] / tests / test_perthreadlock_timing.c
1 /*
2 * test_perthreadloc_timing.c
3 *
4 * Per thread locks - test program
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 *
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.
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>
34 #include <errno.h>
35
36 #include <urcu/arch.h>
37
38 #if defined(_syscall0)
39 _syscall0(pid_t, gettid)
40 #elif defined(__NR_gettid)
41 static inline pid_t gettid(void)
42 {
43 return syscall(__NR_gettid);
44 }
45 #else
46 #warning "use pid as tid"
47 static inline pid_t gettid(void)
48 {
49 return getpid();
50 }
51 #endif
52
53 #include <urcu.h>
54
55 struct test_array {
56 int a;
57 };
58
59 static struct test_array test_array = { 8 };
60
61 struct per_thread_lock {
62 pthread_mutex_t lock;
63 } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
64
65 static struct per_thread_lock *per_thread_lock;
66
67 #define OUTER_READ_LOOP 200U
68 #define INNER_READ_LOOP 100000U
69 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
70
71 #define OUTER_WRITE_LOOP 10U
72 #define INNER_WRITE_LOOP 200U
73 #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
74
75 static int num_read;
76 static int num_write;
77
78 #define NR_READ num_read
79 #define NR_WRITE num_write
80
81 static cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
82 static cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
83
84 void *thr_reader(void *arg)
85 {
86 int i, j;
87 cycles_t time1, time2;
88 long tidx = (long)arg;
89
90 printf("thread_begin %s, thread id : %lx, tid %lu\n",
91 "reader", pthread_self(), (unsigned long)gettid());
92 sleep(2);
93
94 time1 = caa_get_cycles();
95 for (i = 0; i < OUTER_READ_LOOP; i++) {
96 for (j = 0; j < INNER_READ_LOOP; j++) {
97 pthread_mutex_lock(&per_thread_lock[tidx].lock);
98 assert(test_array.a == 8);
99 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
100 }
101 }
102 time2 = caa_get_cycles();
103
104 reader_time[tidx] = time2 - time1;
105
106 sleep(2);
107 printf("thread_end %s, thread id : %lx, tid %lu\n",
108 "reader", pthread_self(), (unsigned long)gettid());
109 return ((void*)1);
110
111 }
112
113 void *thr_writer(void *arg)
114 {
115 int i, j;
116 long tidx;
117 cycles_t time1, time2;
118
119 printf("thread_begin %s, thread id : %lx, tid %lu\n",
120 "writer", pthread_self(), (unsigned long)gettid());
121 sleep(2);
122
123 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
124 for (j = 0; j < INNER_WRITE_LOOP; j++) {
125 time1 = caa_get_cycles();
126 for (tidx = 0; tidx < NR_READ; tidx++) {
127 pthread_mutex_lock(&per_thread_lock[tidx].lock);
128 }
129 test_array.a = 8;
130 for (tidx = NR_READ - 1; tidx >= 0; tidx--) {
131 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
132 }
133 time2 = caa_get_cycles();
134 writer_time[(unsigned long)arg] += time2 - time1;
135 usleep(1);
136 }
137 }
138
139 printf("thread_end %s, thread id : %lx, tid %lu\n",
140 "writer", pthread_self(), (unsigned long)gettid());
141 return ((void*)2);
142 }
143
144 int main(int argc, char **argv)
145 {
146 int err;
147 pthread_t *tid_reader, *tid_writer;
148 void *tret;
149 int i;
150 cycles_t tot_rtime = 0;
151 cycles_t tot_wtime = 0;
152
153 if (argc < 2) {
154 printf("Usage : %s nr_readers nr_writers\n", argv[0]);
155 exit(-1);
156 }
157 num_read = atoi(argv[1]);
158 num_write = atoi(argv[2]);
159
160 reader_time = malloc(sizeof(*reader_time) * num_read);
161 writer_time = malloc(sizeof(*writer_time) * num_write);
162 tid_reader = malloc(sizeof(*tid_reader) * num_read);
163 tid_writer = malloc(sizeof(*tid_writer) * num_write);
164
165 printf("thread %-6s, thread id : %lx, tid %lu\n",
166 "main", pthread_self(), (unsigned long)gettid());
167
168 per_thread_lock = malloc(sizeof(struct per_thread_lock) * NR_READ);
169
170 for (i = 0; i < NR_READ; i++) {
171 pthread_mutex_init(&per_thread_lock[i].lock, NULL);
172 }
173 for (i = 0; i < NR_READ; i++) {
174 err = pthread_create(&tid_reader[i], NULL, thr_reader,
175 (void *)(long)i);
176 if (err != 0)
177 exit(1);
178 }
179 for (i = 0; i < NR_WRITE; i++) {
180 err = pthread_create(&tid_writer[i], NULL, thr_writer,
181 (void *)(long)i);
182 if (err != 0)
183 exit(1);
184 }
185
186 sleep(10);
187
188 for (i = 0; i < NR_READ; i++) {
189 err = pthread_join(tid_reader[i], &tret);
190 if (err != 0)
191 exit(1);
192 tot_rtime += reader_time[i];
193 }
194 for (i = 0; i < NR_WRITE; i++) {
195 err = pthread_join(tid_writer[i], &tret);
196 if (err != 0)
197 exit(1);
198 tot_wtime += writer_time[i];
199 }
200 printf("Time per read : %g cycles\n",
201 (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
202 printf("Time per write : %g cycles\n",
203 (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
204 free(per_thread_lock);
205
206 free(reader_time);
207 free(writer_time);
208 free(tid_reader);
209 free(tid_writer);
210
211 return 0;
212 }
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