Hi,
This patch add a new command testspeed which read a file and then
print the speed. It's quite useful in debugging the efficiency of fs
or network drivers.
--
Best wishes
Bean
=== modified file 'grub-core/Makefile.core.def'
--- grub-core/Makefile.core.def 2012-04-01 19:35:18 +0000
+++ grub-core/Makefile.core.def 2012-04-29 12:10:27 +0000
@@ -1840,3 +1840,7 @@
enable = i386;
};
+module = {
+ name = testspeed;
+ common = commands/testspeed.c;
+};
=== added file 'grub-core/commands/testspeed.c'
--- grub-core/commands/testspeed.c 1970-01-01 00:00:00 +0000
+++ grub-core/commands/testspeed.c 2012-04-29 15:10:24 +0000
@@ -0,0 +1,114 @@
+/* testspeed.c - Command to test file read speed */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2011 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/mm.h>
+#include <grub/file.h>
+#include <grub/time.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+#include <grub/extcmd.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define DEFAULT_BLOCK_SIZE 65536
+
+static const struct grub_arg_option options[] =
+ {
+ {"size", 's', 0, N_("Specify block size."), 0, ARG_TYPE_INT},
+ {0, 0, 0, 0, 0, 0}
+ };
+
+static grub_err_t
+grub_cmd_testspeed (grub_extcmd_context_t ctxt, int argc, char **args)
+{
+ struct grub_arg_list *state = ctxt->state;
+ grub_uint32_t start;
+ grub_uint32_t end;
+ grub_size_t block_size;
+ grub_disk_addr_t total_size;
+ char *buffer;
+ grub_file_t file;
+
+ if (argc == 0)
+ return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("no filename is specified"));
+
+ block_size = (state[0].set) ?
+ grub_strtoul (state[0].arg, 0, 0) : DEFAULT_BLOCK_SIZE;
+
+ buffer = grub_malloc (block_size);
+ if (buffer == NULL)
+ return grub_errno;
+
+ file = grub_file_open (args[0]);
+ if (file == NULL)
+ goto quit;
+
+ total_size = 0;
+ start = grub_get_time_ms ();
+ while (1)
+ {
+ grub_ssize_t size = grub_file_read (file, buffer, block_size);
+ if (size <= 0)
+ break;
+ total_size += size;
+ }
+ end = grub_get_time_ms ();
+ grub_file_close (file);
+
+ grub_printf_ (N_("File size: %llu bytes \n"), (unsigned long long)
total_size);
+ grub_printf_ (N_("Elapsed time: %d.%03d seconds \n"), (end - start) / 1000,
+ (end - start) % 1000);
+
+ if (end != start)
+ {
+ grub_uint64_t q, r;
+ const char *suffix = " KMG";
+
+ q = grub_divmod64(total_size * 1000000, end - start, NULL);
+ while (q > 1024000 && suffix[1] != 0)
+ {
+ q >>= 10;
+ suffix++;
+ }
+
+ q = grub_divmod64(q, 1000, &r);
+ grub_printf_ (N_("Speed: %llu.%03d %cB/s \n"),
+ (unsigned long long) q, (int) r, suffix[0]);
+ }
+
+ quit:
+ grub_free (buffer);
+
+ return grub_errno;
+}
+
+static grub_extcmd_t cmd;
+
+GRUB_MOD_INIT(time)
+{
+ cmd = grub_register_extcmd ("testspeed", grub_cmd_testspeed, 0, N_("[-s
SIZE] FILENAME"),
+ N_("Test file read speed."),
+ options);
+}
+
+GRUB_MOD_FINI(time)
+{
+ grub_unregister_extcmd (cmd);
+}
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