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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2022-01-03 13:03:10 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-01-05 09:07:42 +0100 |
| commit | cb0d339074cf17fa806633126ad5146cd2909db7 (patch) | |
| tree | e593c81c27826d4dbab9ed2cf25cae4ffbb8773f /commands | |
| parent | dc8c0a9425a7be301e03e77489a25b14e20b383a (diff) | |
| download | barebox-cb0d339074cf17fa806633126ad5146cd2909db7.tar.gz barebox-cb0d339074cf17fa806633126ad5146cd2909db7.tar.xz | |
commands: time: add -n option for nanoseconds output
The current millisecond output may be too coarse for debugging timing
of barebox functionality. Add an optional nanosecond output.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220103120310.1729050-1-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands')
| -rw-r--r-- | commands/time.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/commands/time.c b/commands/time.c index 25ba2da15e..2d9fb75e7a 100644 --- a/commands/time.c +++ b/commands/time.c @@ -9,7 +9,7 @@ static int do_time(int argc, char *argv[]) int i; unsigned char *buf; u64 start, end, diff64; - unsigned long diff; + bool nanoseconds = false; int len = 1; /* '\0' */ if (argc < 2) @@ -20,7 +20,13 @@ static int do_time(int argc, char *argv[]) buf = xzalloc(len); - for (i = 1; i < argc; i++) { + i = 1; + if (!strcmp(argv[i], "-n")) { + nanoseconds = true; + i++; + } + + for (; i < argc; i++) { strcat(buf, argv[i]); strcat(buf, " "); } @@ -33,11 +39,10 @@ static int do_time(int argc, char *argv[]) diff64 = end - start; - do_div(diff64, 1000000); - - diff = diff64; + if (!nanoseconds) + do_div(diff64, 1000000); - printf("time: %lums\n", diff); + printf("time: %llu%cs\n", diff64, nanoseconds ? 'n' : 'm'); free(buf); @@ -47,12 +52,14 @@ static int do_time(int argc, char *argv[]) BAREBOX_CMD_HELP_START(time) BAREBOX_CMD_HELP_TEXT("Note: This command depends on COMMAND being interruptible,") BAREBOX_CMD_HELP_TEXT("otherwise the timer may overrun resulting in incorrect results") +BAREBOX_CMD_HELP_TEXT("Options:") +BAREBOX_CMD_HELP_OPT ("-n", "output elapsed time in nanoseconds") BAREBOX_CMD_HELP_END BAREBOX_CMD_START(time) .cmd = do_time, BAREBOX_CMD_DESC("measure execution duration of a command") - BAREBOX_CMD_OPTS("COMMAND") + BAREBOX_CMD_OPTS("[-n] COMMAND") BAREBOX_CMD_GROUP(CMD_GRP_MISC) BAREBOX_CMD_HELP(cmd_time_help) BAREBOX_CMD_END |