1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2015 Tom Gundersen
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "util.h"
#include "siphash24.h"
#define ITERATIONS 10000000ULL
/* see https://131002.net/siphash/siphash.pdf, Appendix A */
int main(int argc, char *argv[]) {
const uint8_t in[15] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e };
const uint8_t key[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
uint64_t out = 0;
unsigned k;
usec_t ts;
siphash24((uint8_t *)&out, in, sizeof(in), key);
assert_se(out == 0xa129ca6149be45e5ULL);
ts = now(CLOCK_MONOTONIC);
for (k = 0; k < ITERATIONS; k++)
siphash24((uint8_t *)&out, in, sizeof(in), key);
ts = now(CLOCK_MONOTONIC) - ts;
log_info("%llu iterations per second", (ITERATIONS * USEC_PER_SEC) / ts);
}
|
