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c5dc1690 SJ |
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); | |
c5dc1690 SJ |
34 | if (hits + misses) |
35 | { | |
36 | unsigned long ratio = hits * 10000 / (hits + misses); | |
37 | grub_printf ("(%lu.%lu%%)\n", ratio / 100, ratio % 100); | |
9c4b5c13 VS |
38 | grub_printf_ (N_("Disk cache statistics: hits = %lu (%lu.%02lu%%)," |
39 | " misses = %lu\n"), ratio / 100, ratio % 100, | |
40 | hits, misses); | |
c5dc1690 SJ |
41 | } |
42 | else | |
9c4b5c13 | 43 | grub_printf ("%s\n", _("No disk cache statistics available\n")); |
c5dc1690 SJ |
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 | } |