c5dc16905a
* configure.ac: --enable-cache-stats added. * config.h.in (DISK_CACHE_STATS): New define. * grub-core/Makefile.core.def (cacheinfo): New command. * include/grub/disk.h(grub_disk_cache_get_performance): New function. * grub-core/commands/cacheinfo.c: New file. * grub-core/commands/minicmd.c (grub_rescue_cmd_info): Updated and moved to cacheinfo.c. * grub-core/kern/disk.c: Use DISK_CACHE_STATS to disable disk cache debug code. * include/grub/disk.h: Likewise.
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* cacheinfo.c - disk cache statistics */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/command.h>
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#include <grub/i18n.h>
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#include <grub/disk.h>
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static grub_err_t
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grub_rescue_cmd_info (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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unsigned long hits, misses;
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grub_disk_cache_get_performance (&hits, &misses);
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grub_printf ("Disk cache: hits = %lu, misses = %lu ", hits, misses);
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if (hits + misses)
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{
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unsigned long ratio = hits * 10000 / (hits + misses);
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grub_printf ("(%lu.%lu%%)\n", ratio / 100, ratio % 100);
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}
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else
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grub_printf ("(N/A)\n");
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return 0;
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}
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static grub_command_t cmd_cacheinfo;
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GRUB_MOD_INIT(cacheinfo)
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{
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cmd_cacheinfo =
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grub_register_command ("cacheinfo", grub_rescue_cmd_info,
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0, N_("Get disk cache info."));
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}
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GRUB_MOD_FINI(cacheinfo)
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{
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grub_unregister_command (cmd_cacheinfo);
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}
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