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 = 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 );