cmd_time: add time command

The 'time' command runs and reports execution time of commands.

Sample usage:
--------------------
u-boot# time crc 0x1000 1000
CRC32 for 00001000 ... 00001fff ==> ae94dc4b

time: 0.004 seconds, 4 ticks
--------------------

Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/README b/README
index c5cfb13a4f9c5297d04cdb9844b3dfae0e58bdea..3a8938f4e3cb6d52a9ad16a707f35f6e43d796ce 100644 (file)
--- a/README
+++ b/README
@@ -783,6 +783,7 @@ The following options need to be configured:
                CONFIG_CMD_SOURCE         "source" command Support
                CONFIG_CMD_SPI          * SPI serial bus support
                CONFIG_CMD_TFTPSRV      * TFTP transfer in server mode
+               CONFIG_CMD_TIME         * run command and report execution time
                CONFIG_CMD_USB          * USB support
                CONFIG_CMD_CDP          * Cisco Discover Protocol support
                CONFIG_CMD_FSL          * Microblaze FSL support

diff --git a/common/Makefile b/common/Makefile
index 371a0d99bafe609dcc1b856285c64aa6d7ddae07..fdc4206853c251ad7d4c9559fd5fc3ce5e2f69d0 100644 (file)
--- a/common/Makefile
+++ b/common/Makefile
@@ -147,6 +147,7 @@ COBJS-$(CONFIG_CMD_SPI) += cmd_spi.o
 COBJS-$(CONFIG_CMD_SPIBOOTLDR) += cmd_spibootldr.o
 COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o
 COBJS-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o
+COBJS-$(CONFIG_CMD_TIME) += cmd_time.o
 COBJS-$(CONFIG_SYS_HUSH_PARSER) += cmd_test.o
 COBJS-$(CONFIG_CMD_TSI148) += cmd_tsi148.o
 COBJS-$(CONFIG_CMD_UBI) += cmd_ubi.o

diff --git a/common/cmd_time.c b/common/cmd_time.c
new file mode 100644 (file)
index 0000000..c937ae4
--- /dev/null
+++ b/common/cmd_time.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program 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 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+
+/*
+ * TODO(clchiou): This function actually minics the bottom-half of the
+ * run_command() function.  Since this function has ARM-dependent timer
+ * codes, we cannot merge it with the run_command() for now.
+ */
+static int run_command_and_time_it(int flag, int argc, char * const argv[],
+               ulong *cycles)
+{
+       cmd_tbl_t *cmdtp = find_cmd(argv[0]);
+       int retval = 0;
+
+       if (!cmdtp) {
+               printf("%s: command not found\n", argv[0]);
+               return 1;
+       }
+       if (argc > cmdtp->maxargs)
+               return cmd_usage(cmdtp);
+
+       /*
+        * TODO(clchiou): get_timer_masked() is only defined in certain ARM
+        * boards.  We could use the new timer API that Graeme is proposing
+        * so that this piece of code would be arch-independent.
+        */
+       *cycles = get_timer_masked();
+       retval = cmdtp->cmd(cmdtp, flag, argc, argv);
+       *cycles = get_timer_masked() - *cycles;
+
+       return retval;
+}
+
+static void report_time(ulong cycles)
+{
+       ulong minutes, seconds, milliseconds;
+       ulong total_seconds, remainder;
+
+       total_seconds = cycles / CONFIG_SYS_HZ;
+       remainder = cycles % CONFIG_SYS_HZ;
+       minutes = total_seconds / 60;
+       seconds = total_seconds % 60;
+       /* approximate millisecond value */
+       milliseconds = (remainder * 1000 + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ;
+
+       printf("\ntime:");
+       if (minutes)
+               printf(" %lu minutes,", minutes);
+       printf(" %lu.%03lu seconds, %lu ticks\n",
+                       seconds, milliseconds, cycles);
+}
+
+static int do_time(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+       ulong cycles = 0;
+       int retval = 0;
+
+       if (argc == 1)
+               return cmd_usage(cmdtp);
+
+       retval = run_command_and_time_it(0, argc - 1, argv + 1, &cycles);
+       report_time(cycles);
+
+       return retval;
+}
+
+U_BOOT_CMD(time, CONFIG_SYS_MAXARGS, 0, do_time,
+               "run commands and summarize execution time",
+               "command [args...]\n");