fix: uatomic_set return value compile fix for non-x86 arch.
[urcu.git] / tests / test_perthreadlock_timing.c
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1/*
2 * test_perthreadloc_timing.c
3 *
4 * Per thread locks - test program
5 *
6982d6d7 6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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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>
102d1d23 32#include <pthread.h>
94b343fd 33#include <errno.h>
833dbdb6 34
ec4e58a3 35#include <urcu/arch.h>
102d1d23 36
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37#ifdef __linux__
38#include <syscall.h>
39#endif
40
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41#if defined(_syscall0)
42_syscall0(pid_t, gettid)
43#elif defined(__NR_gettid)
44static inline pid_t gettid(void)
45{
46 return syscall(__NR_gettid);
47}
48#else
49#warning "use pid as tid"
50static inline pid_t gettid(void)
51{
52 return getpid();
53}
54#endif
55
ec4e58a3 56#include <urcu.h>
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57
58struct test_array {
59 int a;
60};
61
62static struct test_array test_array = { 8 };
63
64struct per_thread_lock {
65 pthread_mutex_t lock;
06f22bdb 66} __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
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67
68static struct per_thread_lock *per_thread_lock;
69
70#define OUTER_READ_LOOP 200U
71#define INNER_READ_LOOP 100000U
72#define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
73
74#define OUTER_WRITE_LOOP 10U
75#define INNER_WRITE_LOOP 200U
76#define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
77
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78static int num_read;
79static int num_write;
102d1d23 80
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81#define NR_READ num_read
82#define NR_WRITE num_write
83
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84static cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
85static cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
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86
87void *thr_reader(void *arg)
88{
89 int i, j;
90 cycles_t time1, time2;
91 long tidx = (long)arg;
92
93 printf("thread_begin %s, thread id : %lx, tid %lu\n",
94 "reader", pthread_self(), (unsigned long)gettid());
95 sleep(2);
96
06f22bdb 97 time1 = caa_get_cycles();
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98 for (i = 0; i < OUTER_READ_LOOP; i++) {
99 for (j = 0; j < INNER_READ_LOOP; j++) {
100 pthread_mutex_lock(&per_thread_lock[tidx].lock);
101 assert(test_array.a == 8);
102 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
103 }
104 }
06f22bdb 105 time2 = caa_get_cycles();
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106
107 reader_time[tidx] = time2 - time1;
108
109 sleep(2);
110 printf("thread_end %s, thread id : %lx, tid %lu\n",
111 "reader", pthread_self(), (unsigned long)gettid());
112 return ((void*)1);
113
114}
115
116void *thr_writer(void *arg)
117{
118 int i, j;
119 long tidx;
120 cycles_t time1, time2;
121
122 printf("thread_begin %s, thread id : %lx, tid %lu\n",
123 "writer", pthread_self(), (unsigned long)gettid());
124 sleep(2);
125
126 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
127 for (j = 0; j < INNER_WRITE_LOOP; j++) {
06f22bdb 128 time1 = caa_get_cycles();
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129 for (tidx = 0; tidx < NR_READ; tidx++) {
130 pthread_mutex_lock(&per_thread_lock[tidx].lock);
131 }
132 test_array.a = 8;
133 for (tidx = NR_READ - 1; tidx >= 0; tidx--) {
134 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
135 }
06f22bdb 136 time2 = caa_get_cycles();
102d1d23 137 writer_time[(unsigned long)arg] += time2 - time1;
fc606a74 138 usleep(1);
102d1d23 139 }
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140 }
141
142 printf("thread_end %s, thread id : %lx, tid %lu\n",
143 "writer", pthread_self(), (unsigned long)gettid());
144 return ((void*)2);
145}
146
2c9689fe 147int main(int argc, char **argv)
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148{
149 int err;
2c9689fe 150 pthread_t *tid_reader, *tid_writer;
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151 void *tret;
152 int i;
153 cycles_t tot_rtime = 0;
154 cycles_t tot_wtime = 0;
155
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156 if (argc < 2) {
157 printf("Usage : %s nr_readers nr_writers\n", argv[0]);
158 exit(-1);
159 }
160 num_read = atoi(argv[1]);
161 num_write = atoi(argv[2]);
162
163 reader_time = malloc(sizeof(*reader_time) * num_read);
164 writer_time = malloc(sizeof(*writer_time) * num_write);
165 tid_reader = malloc(sizeof(*tid_reader) * num_read);
166 tid_writer = malloc(sizeof(*tid_writer) * num_write);
167
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168 printf("thread %-6s, thread id : %lx, tid %lu\n",
169 "main", pthread_self(), (unsigned long)gettid());
170
171 per_thread_lock = malloc(sizeof(struct per_thread_lock) * NR_READ);
172
173 for (i = 0; i < NR_READ; i++) {
174 pthread_mutex_init(&per_thread_lock[i].lock, NULL);
175 }
176 for (i = 0; i < NR_READ; i++) {
177 err = pthread_create(&tid_reader[i], NULL, thr_reader,
178 (void *)(long)i);
179 if (err != 0)
180 exit(1);
181 }
182 for (i = 0; i < NR_WRITE; i++) {
183 err = pthread_create(&tid_writer[i], NULL, thr_writer,
184 (void *)(long)i);
185 if (err != 0)
186 exit(1);
187 }
188
189 sleep(10);
190
191 for (i = 0; i < NR_READ; i++) {
192 err = pthread_join(tid_reader[i], &tret);
193 if (err != 0)
194 exit(1);
195 tot_rtime += reader_time[i];
196 }
197 for (i = 0; i < NR_WRITE; i++) {
198 err = pthread_join(tid_writer[i], &tret);
199 if (err != 0)
200 exit(1);
201 tot_wtime += writer_time[i];
202 }
203 printf("Time per read : %g cycles\n",
204 (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
205 printf("Time per write : %g cycles\n",
206 (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
207 free(per_thread_lock);
208
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209 free(reader_time);
210 free(writer_time);
211 free(tid_reader);
212 free(tid_writer);
213
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214 return 0;
215}
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