Cleanup: enable signed/unsigned compare compiler warning
[urcu.git] / tests / benchmark / 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 <pthread.h>
33 #include <errno.h>
34
35 #include <urcu/arch.h>
36
37 #include "thread-id.h"
38
39 #include <urcu.h>
40
41 struct test_array {
42 int a;
43 };
44
45 static struct test_array test_array = { 8 };
46
47 struct per_thread_lock {
48 pthread_mutex_t lock;
49 } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
50
51 static struct per_thread_lock *per_thread_lock;
52
53 #define OUTER_READ_LOOP 200U
54 #define INNER_READ_LOOP 100000U
55 #define READ_LOOP ((unsigned long long)OUTER_READ_LOOP * INNER_READ_LOOP)
56
57 #define OUTER_WRITE_LOOP 10U
58 #define INNER_WRITE_LOOP 200U
59 #define WRITE_LOOP ((unsigned long long)OUTER_WRITE_LOOP * INNER_WRITE_LOOP)
60
61 static int num_read;
62 static int num_write;
63
64 #define NR_READ num_read
65 #define NR_WRITE num_write
66
67 static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *reader_time;
68 static caa_cycles_t __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *writer_time;
69
70 void *thr_reader(void *arg)
71 {
72 unsigned int i, j;
73 caa_cycles_t time1, time2;
74 long tidx = (long)arg;
75
76 printf("thread_begin %s, tid %lu\n",
77 "reader", urcu_get_thread_id());
78 sleep(2);
79
80 time1 = caa_get_cycles();
81 for (i = 0; i < OUTER_READ_LOOP; i++) {
82 for (j = 0; j < INNER_READ_LOOP; j++) {
83 pthread_mutex_lock(&per_thread_lock[tidx].lock);
84 assert(test_array.a == 8);
85 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
86 }
87 }
88 time2 = caa_get_cycles();
89
90 reader_time[tidx] = time2 - time1;
91
92 sleep(2);
93 printf("thread_end %s, tid %lu\n",
94 "reader", urcu_get_thread_id());
95 return ((void*)1);
96
97 }
98
99 void *thr_writer(void *arg)
100 {
101 unsigned int i, j;
102 long tidx;
103 caa_cycles_t time1, time2;
104
105 printf("thread_begin %s, tid %lu\n",
106 "writer", urcu_get_thread_id());
107 sleep(2);
108
109 for (i = 0; i < OUTER_WRITE_LOOP; i++) {
110 for (j = 0; j < INNER_WRITE_LOOP; j++) {
111 time1 = caa_get_cycles();
112 for (tidx = 0; tidx < NR_READ; tidx++) {
113 pthread_mutex_lock(&per_thread_lock[tidx].lock);
114 }
115 test_array.a = 8;
116 for (tidx = NR_READ - 1; tidx >= 0; tidx--) {
117 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
118 }
119 time2 = caa_get_cycles();
120 writer_time[(unsigned long)arg] += time2 - time1;
121 usleep(1);
122 }
123 }
124
125 printf("thread_end %s, tid %lu\n",
126 "writer", urcu_get_thread_id());
127 return ((void*)2);
128 }
129
130 int main(int argc, char **argv)
131 {
132 int err;
133 pthread_t *tid_reader, *tid_writer;
134 void *tret;
135 int i;
136 caa_cycles_t tot_rtime = 0;
137 caa_cycles_t tot_wtime = 0;
138
139 if (argc < 2) {
140 printf("Usage : %s nr_readers nr_writers\n", argv[0]);
141 exit(-1);
142 }
143 num_read = atoi(argv[1]);
144 num_write = atoi(argv[2]);
145
146 reader_time = calloc(num_read, sizeof(*reader_time));
147 writer_time = calloc(num_write, sizeof(*writer_time));
148 tid_reader = calloc(num_read, sizeof(*tid_reader));
149 tid_writer = calloc(num_write, sizeof(*tid_writer));
150
151 printf("thread %-6s, tid %lu\n",
152 "main", urcu_get_thread_id());
153
154 per_thread_lock = malloc(sizeof(struct per_thread_lock) * NR_READ);
155
156 for (i = 0; i < NR_READ; i++) {
157 pthread_mutex_init(&per_thread_lock[i].lock, NULL);
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 free(per_thread_lock);
191
192 free(reader_time);
193 free(writer_time);
194 free(tid_reader);
195 free(tid_writer);
196
197 return 0;
198 }
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