From 5de95712d99eff5c628b19681b12a88dd20ec021 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Wed, 16 Mar 2011 21:32:05 +0100 Subject: Add 'time' command to measure execution time of a command Signed-off-by: Sascha Hauer --- commands/time.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 commands/time.c (limited to 'commands/time.c') diff --git a/commands/time.c b/commands/time.c new file mode 100644 index 0000000000..9a769451aa --- /dev/null +++ b/commands/time.c @@ -0,0 +1,57 @@ +#include +#include +#include +#include +#include + +static int do_time(struct command *cmdtp, int argc, char *argv[]) +{ + int i; + unsigned char *buf; + u64 start, end, diff64; + unsigned long diff; + int len = 0; + + if (argc < 2) + return COMMAND_ERROR_USAGE; + + for (i = 1; i < argc; i++) + len += strlen(argv[i]) + 1; + + buf = xzalloc(len); + + for (i = 1; i < argc; i++) { + strcat(buf, argv[i]); + strcat(buf, " "); + } + + start = get_time_ns(); + + run_command(buf, 0); + + end = get_time_ns(); + + diff64 = end - start; + + do_div(diff64, 1000000); + + diff = diff64; + + printf("time: %ldms\n", diff); + + free(buf); + + return 0; +} + +BAREBOX_CMD_HELP_START(time) +BAREBOX_CMD_HELP_USAGE("time \n") +BAREBOX_CMD_HELP_SHORT("note: This command depends on being interruptible,\n") +BAREBOX_CMD_HELP_SHORT("Otherwise the timer may overrun resulting in incorrect results\n") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(time) + .cmd = do_time, + .usage = "measure execution time of a command", + BAREBOX_CMD_HELP(cmd_time_help) +BAREBOX_CMD_END -- cgit v1.2.3