1
2
3
4
5
6#include <common.h>
7#include <command.h>
8#include <div64.h>
9#include "dhry.h"
10
11static int do_dhry(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
12{
13 ulong start, duration, vax_mips;
14 u64 dhry_per_sec;
15 int iterations = 1000000;
16
17 if (argc > 1)
18 iterations = simple_strtoul(argv[1], NULL, 10);
19
20 start = get_timer(0);
21 dhry(iterations);
22 duration = get_timer(start);
23 dhry_per_sec = lldiv(iterations * 1000ULL, duration);
24 vax_mips = lldiv(dhry_per_sec, 1757);
25 printf("%d iterations in %lu ms: %lu/s, %lu DMIPS\n", iterations,
26 duration, (ulong)dhry_per_sec, vax_mips);
27
28 return 0;
29}
30
31U_BOOT_CMD(
32 dhry, 2, 1, do_dhry,
33 "[iterations] - run dhrystone benchmark",
34 "\n - run the Dhrystone 2.1 benchmark, a rough measure of CPU speed\n"
35);
36