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
|
/*
* (C) Copyright 2015 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <div64.h>
#include "dhry.h"
static int do_dhry(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
ulong start, duration, vax_mips;
u64 dhry_per_sec;
int iterations = 1000000;
if (argc > 1)
iterations = simple_strtoul(argv[1], NULL, 10);
start = get_timer(0);
dhry(iterations);
duration = get_timer(start);
dhry_per_sec = lldiv(iterations * 1000ULL, duration);
vax_mips = dhry_per_sec / 1757;
printf("%d iterations in %lu ms: %lu/s, %lu DMIPS\n", iterations,
duration, (ulong)dhry_per_sec, vax_mips);
return 0;
}
U_BOOT_CMD(
dhry, 2, 1, do_dhry,
"[iterations] - run dhrystone benchmark",
"\n - run the Dhrystone 2.1 benchmark, a rough measure of CPU speed\n"
);
|
