1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2015 Google, Inc
4 */
5
6 #include <command.h>
7 #include <div64.h>
8 #include <time.h>
9 #include <vsprintf.h>
10 #include "dhry.h"
11
do_dhry(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])12 static int do_dhry(struct cmd_tbl *cmdtp, int flag, int argc,
13 char *const argv[])
14 {
15 ulong start, duration, vax_mips;
16 u64 dhry_per_sec;
17 int iterations = 1000000;
18
19 if (argc > 1)
20 iterations = dectoul(argv[1], NULL);
21
22 start = get_timer(0);
23 dhry(iterations);
24 duration = get_timer(start);
25 dhry_per_sec = lldiv(iterations * 1000ULL, duration);
26 vax_mips = lldiv(dhry_per_sec, 1757);
27 printf("%d iterations in %lu ms: %lu/s, %lu DMIPS\n", iterations,
28 duration, (ulong)dhry_per_sec, vax_mips);
29
30 return 0;
31 }
32
33 U_BOOT_CMD(
34 dhry, 2, 1, do_dhry,
35 "[iterations] - run dhrystone benchmark",
36 "\n - run the Dhrystone 2.1 benchmark, a rough measure of CPU speed\n"
37 );
38