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[u-boot] / lib / dhry / cmd_dhry.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2015 Google, Inc
4  */
5
6 #include <common.h>
7 #include <command.h>
8 #include <div64.h>
9 #include "dhry.h"
10
11 static 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
31 U_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 );