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