Add S390 architecture specific headers
[urcu.git] / test_rwlock_timing.c
1 /*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
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 <arch.h>
35
36 /* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
37 #define CACHE_LINE_SIZE 4096
38
39 #if defined(_syscall0)
40 _syscall0(pid_t, gettid)
41 #elif defined(__NR_gettid)
42 static inline pid_t gettid(void)
43 {
44 return syscall(__NR_gettid);
45 }
46 #else
47 #warning "use pid as tid"
48 static inline pid_t gettid(void)
49 {
50 return getpid();
51 }
52 #endif
53
54 #include "urcu.h"
55
56 struct test_array {
57 int a;
58 };
59
60 pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
61
62 static struct test_array test_array = { 8 };
63
64 #define OUTER_READ_LOOP 200U
65 #define INNER_READ_LOOP 100000U
66 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
67
68 #define OUTER_WRITE_LOOP 10U
69 #define INNER_WRITE_LOOP 200U
70 #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
71
72 static int num_read;
73 static int num_write;
74
75 #define NR_READ num_read
76 #define NR_WRITE num_write
77
78 static cycles_t __attribute__((aligned(CACHE_LINE_SIZE))) *reader_time;
79 static cycles_t __attribute__((aligned(CACHE_LINE_SIZE))) *writer_time;
80
81 void *thr_reader(void *arg)
82 {
83 int i, j;
84 cycles_t time1, time2;
85
86 printf("thread_begin %s, thread id : %lx, tid %lu\n",
87 "reader", pthread_self(), (unsigned long)gettid());
88 sleep(2);
89
90 time1 = get_cycles();
91 for (i = 0; i < OUTER_READ_LOOP; i++) {
92 for (j = 0; j < INNER_READ_LOOP; j++) {
93 pthread_rwlock_rdlock(&lock);
94 assert(test_array.a == 8);
95 pthread_rwlock_unlock(&lock);
96 }
97 }
98 time2 = get_cycles();
99
100 reader_time[(unsigned long)arg] = time2 - time1;
101
102 sleep(2);
103 printf("thread_end %s, thread id : %lx, tid %lu\n",
104 "reader", pthread_self(), (unsigned long)gettid());
105 return ((void*)1);
106
107 }
108
109 void *thr_writer(void *arg)
110 {
111 int i, j;
112 cycles_t time1, time2;
113
114 printf("thread_begin %s, thread id : %lx, tid %lu\n",
115 "writer", pthread_self(), (unsigned long)gettid());
116 sleep(2);
117
118 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
119 for (j = 0; j < INNER_WRITE_LOOP; j++) {
120 time1 = get_cycles();
121 pthread_rwlock_wrlock(&lock);
122 test_array.a = 8;
123 pthread_rwlock_unlock(&lock);
124 time2 = get_cycles();
125 writer_time[(unsigned long)arg] += time2 - time1;
126 usleep(1);
127 }
128 }
129
130 printf("thread_end %s, thread id : %lx, tid %lu\n",
131 "writer", pthread_self(), (unsigned long)gettid());
132 return ((void*)2);
133 }
134
135 int main(int argc, char **argv)
136 {
137 int err;
138 pthread_t *tid_reader, *tid_writer;
139 void *tret;
140 int i;
141 cycles_t tot_rtime = 0;
142 cycles_t tot_wtime = 0;
143
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
151 reader_time = malloc(sizeof(*reader_time) * num_read);
152 writer_time = malloc(sizeof(*writer_time) * num_write);
153 tid_reader = malloc(sizeof(*tid_reader) * num_read);
154 tid_writer = malloc(sizeof(*tid_writer) * num_write);
155
156 printf("thread %-6s, thread id : %lx, tid %lu\n",
157 "main", pthread_self(), (unsigned long)gettid());
158
159 for (i = 0; i < NR_READ; i++) {
160 err = pthread_create(&tid_reader[i], NULL, thr_reader,
161 (void *)(long)i);
162 if (err != 0)
163 exit(1);
164 }
165 for (i = 0; i < NR_WRITE; i++) {
166 err = pthread_create(&tid_writer[i], NULL, thr_writer,
167 (void *)(long)i);
168 if (err != 0)
169 exit(1);
170 }
171
172 sleep(10);
173
174 for (i = 0; i < NR_READ; i++) {
175 err = pthread_join(tid_reader[i], &tret);
176 if (err != 0)
177 exit(1);
178 tot_rtime += reader_time[i];
179 }
180 for (i = 0; i < NR_WRITE; i++) {
181 err = pthread_join(tid_writer[i], &tret);
182 if (err != 0)
183 exit(1);
184 tot_wtime += writer_time[i];
185 }
186 printf("Time per read : %g cycles\n",
187 (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP));
188 printf("Time per write : %g cycles\n",
189 (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP));
190
191 free(reader_time);
192 free(writer_time);
193 free(tid_reader);
194 free(tid_writer);
195
196 return 0;
197 }
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