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perf script: Allow time to be displayed in nanoseconds 

Add option --ns to display time to 9 decimal places.  That is useful in
some cases, for example when using Intel PT cycle accurate mode.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-6-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-09-25 16:15:36 +03:00 committed by Arnaldo Carvalho de Melo
parent 116f349c5b
commit 83e1986032
2 changed files with 10 additions and 1 deletions
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3
tools/perf/Documentation/perf-script.txt
View File

@ -249,6 +249,9 @@ include::itrace.txt[]
--full-source-path::
Show the full path for source files for srcline output.
--ns::
Use 9 decimal places when displaying time (i.e. show the nanoseconds)
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script-perl[1],

8
tools/perf/builtin-script.c
View File

@ -29,6 +29,7 @@ static bool no_callchain;
static bool latency_format;
static bool system_wide;
static bool print_flags;
static bool nanosecs;
static const char *cpu_list;
static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
@ -415,7 +416,10 @@ static void print_sample_start(struct perf_sample *sample,
secs = nsecs / NSECS_PER_SEC;
nsecs -= secs * NSECS_PER_SEC;
usecs = nsecs / NSECS_PER_USEC;
printf("%5lu.%06lu: ", secs, usecs);
if (nanosecs)
printf("%5lu.%09llu: ", secs, nsecs);
else
printf("%5lu.%06lu: ", secs, usecs);
}
}
@ -1695,6 +1699,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_BOOLEAN('\0', "show-switch-events", &script.show_switch_events,
"Show context switch events (if recorded)"),
OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
OPT_BOOLEAN(0, "ns", &nanosecs,
"Use 9 decimal places when displaying time"),
OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
"Instruction Tracing options",
itrace_parse_synth_opts),