arch/all-pc/boot/grub2-aros/grub-core/commands/cacheinfo.c

   1 /* cacheinfo.c - disk cache statistics  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008,2010  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/dl.h>
  21 #include <grub/misc.h>
  22 #include <grub/command.h>
  23 #include <grub/i18n.h>
  24 #include <grub/disk.h>
  25
  26 static grub_err_t
  27 grub_rescue_cmd_info (struct grub_command *cmd __attribute__ ((unused)),
  28     int argc __attribute__ ((unused)),
  29     char *argv[] __attribute__ ((unused)))
  30 {
  31   unsigned long hits, misses;
  32
  33   grub_disk_cache_get_performance (&hits, &misses);
  34   if (hits + misses)
  35     {
  36       unsigned long ratio = hits * 10000 / (hits + misses);
  37       grub_printf ("(%lu.%lu%%)\n", ratio / 100, ratio % 100);
  38       grub_printf_ (N_("Disk cache statistics: hits = %lu (%lu.%02lu%%),"
  39                      " misses = %lu\n"), ratio / 100, ratio % 100,
  40                     hits, misses);
  41     }
  42   else
  43     grub_printf ("%s\n", _("No disk cache statistics available\n"));
  44
  45  return 0;
  46 }
  47
  48 static grub_command_t cmd_cacheinfo;
  49
  50 GRUB_MOD_INIT(cacheinfo)
  51 {
  52   cmd_cacheinfo =
  53     grub_register_command ("cacheinfo", grub_rescue_cmd_info,
  54                            0, N_("Get disk cache info."));
  55 }
  56
  57 GRUB_MOD_FINI(cacheinfo)
  58 {
  59   grub_unregister_command (cmd_cacheinfo);
  60 }