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Commit 4bb09192 authored by David Ahern's avatar David Ahern Committed by Arnaldo Carvalho de Melo
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perf trace: Add option to show full timestamp 



Current timestamp shown for output is time relative to firt sample. This
patch adds an option to show the absolute perf_clock timestamp which is
useful when comparing output across commands (e.g., perf-trace to
perf-script).

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1378319865-55695-1-git-send-email-dsahern@gmail.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c045bf02

tools/perf/Documentation/perf-trace.txt

+4 −0
Original line number Diff line number Diff line
@@ -78,6 +78,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. 
--input

	Process events from a given perf data file.



-T

--time

	Print full timestamp rather time relative to first sample.



SEE ALSO

--------

linkperf:perf-record[1], linkperf:perf-script[1]

tools/perf/builtin-trace.c

+5 −2
Original line number Diff line number Diff line
@@ -624,6 +624,7 @@ struct trace { 
	struct perf_record_opts opts;

	struct machine		host;

	u64			base_time;

	bool			full_time;

	FILE			*output;

	unsigned long		nr_events;

	struct strlist		*ev_qualifier;
@@ -1066,7 +1067,7 @@ static int trace__process_sample(struct perf_tool *tool, 
	if (skip_sample(trace, sample))

		return 0;



	if (trace->base_time == 0)

	if (!trace->full_time && trace->base_time == 0)

		trace->base_time = sample->time;



	if (handler)
@@ -1195,7 +1196,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv) 
				continue;

			}



			if (trace->base_time == 0)

			if (!trace->full_time && trace->base_time == 0)

				trace->base_time = sample.time;



			if (type != PERF_RECORD_SAMPLE) {
@@ -1433,6 +1434,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) 
		     trace__set_duration),

	OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),

	OPT_INCR('v', "verbose", &verbose, "be more verbose"),

	OPT_BOOLEAN('T', "time", &trace.full_time,

		    "Show full timestamp, not time relative to first start"),

	OPT_END()

	};

	int err;