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ca366d0e38
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>
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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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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