1 files changed, 62 insertions, 0 deletions
diff --git a/grub-core/commands/cacheinfo.c b/grub-core/commands/cacheinfo.c
new file mode 100644
index 0000000..d34a346
--- /dev/null
+++ b/grub-core/commands/cacheinfo.c
@@ -0,0 +1,62 @@
+/* cacheinfo.c - disk cache statistics  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008,2010  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/dl.h>
+#include <grub/misc.h>
+#include <grub/command.h>
+#include <grub/i18n.h>
+#include <grub/disk.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_err_t
+grub_rescue_cmd_info (struct grub_command *cmd __attribute__ ((unused)),
+    int argc __attribute__ ((unused)),
+    char *argv[] __attribute__ ((unused)))
+{
+  unsigned long hits, misses;
+
+  grub_disk_cache_get_performance (&hits, &misses);
+  if (hits + misses)
+    {
+      unsigned long ratio = hits * 10000 / (hits + misses);
+      grub_printf ("(%lu.%lu%%)\n", ratio / 100, ratio % 100);
+      grub_printf_ (N_("Disk cache statistics: hits = %lu (%lu.%02lu%%),"
+		     " misses = %lu\n"), ratio / 100, ratio % 100,
+		    hits, misses);
+    }
+  else
+    grub_printf ("%s\n", _("No disk cache statistics available\n"));    
+
+ return 0;
+}
+
+static grub_command_t cmd_cacheinfo;
+
+GRUB_MOD_INIT(cacheinfo)
+{
+  cmd_cacheinfo =
+    grub_register_command ("cacheinfo", grub_rescue_cmd_info,
+			   0, N_("Get disk cache info."));
+}
+
+GRUB_MOD_FINI(cacheinfo)
+{
+  grub_unregister_command (cmd_cacheinfo);
+}