Commit | Line | Data |
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102d1d23 MD |
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> |
102d1d23 MD |
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> | |
102d1d23 | 31 | #include <pthread.h> |
94b343fd | 32 | #include <errno.h> |
833dbdb6 | 33 | |
ec4e58a3 | 34 | #include <urcu/arch.h> |
01477510 | 35 | #include <urcu/assert.h> |
102d1d23 | 36 | |
94df6318 | 37 | #include "thread-id.h" |
102d1d23 | 38 | |
ec4e58a3 | 39 | #include <urcu.h> |
102d1d23 MD |
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; | |
06f22bdb | 49 | } __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */ |
102d1d23 MD |
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 | ||
2c9689fe MD |
61 | static int num_read; |
62 | static int num_write; | |
102d1d23 | 63 | |
2c9689fe MD |
64 | #define NR_READ num_read |
65 | #define NR_WRITE num_write | |
66 | ||
3fa18286 MD |
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; | |
102d1d23 | 69 | |
61c3fb60 | 70 | static |
102d1d23 MD |
71 | void *thr_reader(void *arg) |
72 | { | |
3fa18286 | 73 | caa_cycles_t time1, time2; |
102d1d23 | 74 | long tidx = (long)arg; |
4104b71f MD |
75 | unsigned int i, j; |
76 | int ret; | |
102d1d23 | 77 | |
94df6318 MD |
78 | printf("thread_begin %s, tid %lu\n", |
79 | "reader", urcu_get_thread_id()); | |
102d1d23 MD |
80 | sleep(2); |
81 | ||
06f22bdb | 82 | time1 = caa_get_cycles(); |
102d1d23 MD |
83 | for (i = 0; i < OUTER_READ_LOOP; i++) { |
84 | for (j = 0; j < INNER_READ_LOOP; j++) { | |
4104b71f MD |
85 | ret = pthread_mutex_lock(&per_thread_lock[tidx].lock); |
86 | if (ret) { | |
87 | perror("Error in pthread mutex lock"); | |
88 | exit(-1); | |
89 | } | |
01477510 | 90 | urcu_posix_assert(test_array.a == 8); |
4104b71f MD |
91 | ret = pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
92 | if (ret) { | |
93 | perror("Error in pthread mutex unlock"); | |
94 | exit(-1); | |
95 | } | |
102d1d23 MD |
96 | } |
97 | } | |
06f22bdb | 98 | time2 = caa_get_cycles(); |
102d1d23 MD |
99 | |
100 | reader_time[tidx] = time2 - time1; | |
101 | ||
102 | sleep(2); | |
94df6318 MD |
103 | printf("thread_end %s, tid %lu\n", |
104 | "reader", urcu_get_thread_id()); | |
102d1d23 MD |
105 | return ((void*)1); |
106 | ||
107 | } | |
108 | ||
61c3fb60 | 109 | static |
102d1d23 MD |
110 | void *thr_writer(void *arg) |
111 | { | |
4104b71f | 112 | caa_cycles_t time1, time2; |
83e334d0 | 113 | unsigned int i, j; |
102d1d23 | 114 | long tidx; |
4104b71f | 115 | int ret; |
102d1d23 | 116 | |
94df6318 MD |
117 | printf("thread_begin %s, tid %lu\n", |
118 | "writer", urcu_get_thread_id()); | |
102d1d23 MD |
119 | sleep(2); |
120 | ||
121 | for (i = 0; i < OUTER_WRITE_LOOP; i++) { | |
122 | for (j = 0; j < INNER_WRITE_LOOP; j++) { | |
06f22bdb | 123 | time1 = caa_get_cycles(); |
102d1d23 | 124 | for (tidx = 0; tidx < NR_READ; tidx++) { |
4104b71f MD |
125 | ret = pthread_mutex_lock(&per_thread_lock[tidx].lock); |
126 | if (ret) { | |
127 | perror("Error in pthread mutex lock"); | |
128 | exit(-1); | |
129 | } | |
102d1d23 MD |
130 | } |
131 | test_array.a = 8; | |
132 | for (tidx = NR_READ - 1; tidx >= 0; tidx--) { | |
4104b71f MD |
133 | ret = pthread_mutex_unlock(&per_thread_lock[tidx].lock); |
134 | if (ret) { | |
135 | perror("Error in pthread mutex unlock"); | |
136 | exit(-1); | |
137 | } | |
102d1d23 | 138 | } |
06f22bdb | 139 | time2 = caa_get_cycles(); |
102d1d23 | 140 | writer_time[(unsigned long)arg] += time2 - time1; |
fc606a74 | 141 | usleep(1); |
102d1d23 | 142 | } |
102d1d23 MD |
143 | } |
144 | ||
94df6318 MD |
145 | printf("thread_end %s, tid %lu\n", |
146 | "writer", urcu_get_thread_id()); | |
102d1d23 MD |
147 | return ((void*)2); |
148 | } | |
149 | ||
2c9689fe | 150 | int main(int argc, char **argv) |
102d1d23 MD |
151 | { |
152 | int err; | |
2c9689fe | 153 | pthread_t *tid_reader, *tid_writer; |
102d1d23 MD |
154 | void *tret; |
155 | int i; | |
3fa18286 MD |
156 | caa_cycles_t tot_rtime = 0; |
157 | caa_cycles_t tot_wtime = 0; | |
102d1d23 | 158 | |
2c9689fe MD |
159 | if (argc < 2) { |
160 | printf("Usage : %s nr_readers nr_writers\n", argv[0]); | |
161 | exit(-1); | |
162 | } | |
163 | num_read = atoi(argv[1]); | |
164 | num_write = atoi(argv[2]); | |
165 | ||
9aa14175 MD |
166 | reader_time = calloc(num_read, sizeof(*reader_time)); |
167 | writer_time = calloc(num_write, sizeof(*writer_time)); | |
168 | tid_reader = calloc(num_read, sizeof(*tid_reader)); | |
169 | tid_writer = calloc(num_write, sizeof(*tid_writer)); | |
2c9689fe | 170 | |
94df6318 MD |
171 | printf("thread %-6s, tid %lu\n", |
172 | "main", urcu_get_thread_id()); | |
102d1d23 MD |
173 | |
174 | per_thread_lock = malloc(sizeof(struct per_thread_lock) * NR_READ); | |
175 | ||
176 | for (i = 0; i < NR_READ; i++) { | |
177 | pthread_mutex_init(&per_thread_lock[i].lock, NULL); | |
178 | } | |
179 | for (i = 0; i < NR_READ; i++) { | |
180 | err = pthread_create(&tid_reader[i], NULL, thr_reader, | |
181 | (void *)(long)i); | |
182 | if (err != 0) | |
183 | exit(1); | |
184 | } | |
185 | for (i = 0; i < NR_WRITE; i++) { | |
186 | err = pthread_create(&tid_writer[i], NULL, thr_writer, | |
187 | (void *)(long)i); | |
188 | if (err != 0) | |
189 | exit(1); | |
190 | } | |
191 | ||
192 | sleep(10); | |
193 | ||
194 | for (i = 0; i < NR_READ; i++) { | |
195 | err = pthread_join(tid_reader[i], &tret); | |
196 | if (err != 0) | |
197 | exit(1); | |
198 | tot_rtime += reader_time[i]; | |
199 | } | |
200 | for (i = 0; i < NR_WRITE; i++) { | |
201 | err = pthread_join(tid_writer[i], &tret); | |
202 | if (err != 0) | |
203 | exit(1); | |
204 | tot_wtime += writer_time[i]; | |
205 | } | |
206 | printf("Time per read : %g cycles\n", | |
207 | (double)tot_rtime / ((double)NR_READ * (double)READ_LOOP)); | |
208 | printf("Time per write : %g cycles\n", | |
209 | (double)tot_wtime / ((double)NR_WRITE * (double)WRITE_LOOP)); | |
210 | free(per_thread_lock); | |
211 | ||
2c9689fe MD |
212 | free(reader_time); |
213 | free(writer_time); | |
214 | free(tid_reader); | |
215 | free(tid_writer); | |
216 | ||
102d1d23 MD |
217 | return 0; |
218 | } |