1 /*
2 * Copyright 2011-2015 Samy Al Bahra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <ck_bytelock.h>
28 #include <ck_rwlock.h>
29 #include <inttypes.h>
30 #include <stdio.h>
31
32 #include "../../common.h"
33
34 #ifndef STEPS
35 #define STEPS 1000000
36 #endif
37
38 int
main(void)39 main(void)
40 {
41 uint64_t s_b, e_b, i;
42 ck_bytelock_t bytelock = CK_BYTELOCK_INITIALIZER;
43 ck_rwlock_t naive;
44
45 for (i = 0; i < STEPS; i++) {
46 ck_bytelock_write_lock(&bytelock, 1);
47 ck_bytelock_write_unlock(&bytelock);
48 }
49
50 s_b = rdtsc();
51 for (i = 0; i < STEPS; i++) {
52 ck_bytelock_write_lock(&bytelock, 1);
53 ck_bytelock_write_unlock(&bytelock);
54 }
55 e_b = rdtsc();
56 printf("WRITE: bytelock %15" PRIu64 "\n", (e_b - s_b) / STEPS);
57
58 ck_rwlock_init(&naive);
59 for (i = 0; i < STEPS; i++) {
60 ck_rwlock_write_lock(&naive);
61 ck_rwlock_write_unlock(&naive);
62 }
63
64 s_b = rdtsc();
65 for (i = 0; i < STEPS; i++) {
66 ck_rwlock_write_lock(&naive);
67 ck_rwlock_write_unlock(&naive);
68 }
69 e_b = rdtsc();
70 printf("WRITE: naive %15" PRIu64 "\n", (e_b - s_b) / STEPS);
71
72 for (i = 0; i < STEPS; i++) {
73 ck_bytelock_read_lock(&bytelock, 1);
74 ck_bytelock_read_unlock(&bytelock, 1);
75 }
76 s_b = rdtsc();
77 for (i = 0; i < STEPS; i++) {
78 ck_bytelock_read_lock(&bytelock, 1);
79 ck_bytelock_read_unlock(&bytelock, 1);
80 }
81 e_b = rdtsc();
82 printf("READ: bytelock %15" PRIu64 "\n", (e_b - s_b) / STEPS);
83
84 for (i = 0; i < STEPS; i++) {
85 ck_rwlock_read_lock(&naive);
86 ck_rwlock_read_unlock(&naive);
87 }
88
89 s_b = rdtsc();
90 for (i = 0; i < STEPS; i++) {
91 ck_rwlock_read_lock(&naive);
92 ck_rwlock_read_unlock(&naive);
93 }
94 e_b = rdtsc();
95 printf("READ: naive %15" PRIu64 "\n", (e_b - s_b) / STEPS);
96
97 return (0);
98 }
99
100