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