Commit 3ae9a34d authored Jun 23, 2011 by Zhengyu He Committed by Ingo Molnar Jul 01, 2011

perf stat: Add noise output for csv mode



Previously, when you want perf-stat to output the statistics in
csv mode, no information of the noise will be printed out.

For example right now we output this --repeat information:

 ./perf stat -r3 -x, sleep 1
 1.164789,task-clock
 8,context-switches
 0,CPU-migrations
 219,page-faults
 3337800,cycles

With this patch, the output will be appended with an additional
entry for the noise value:

 ./perf stat -r3 -x, sleep 1
 1.164789,task-clock,3.75%
 8,context-switches,75.00%
 0,CPU-migrations,100.00%
 219,page-faults,0.00%
 3337800,cycles,3.36%

Signed-off-by: Zhengyu He <zhengyuh@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Stephane Eranian <eranian@google.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1308861942-4945-1-git-send-email-zhengyuh@google.com


Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 343a031f

tools/perf/builtin-stat.c

+6 −3

Original line number	Original line	Diff line number	Diff line
	@@ -517,6 +517,9 @@ static void print_noise_pct(double total, double avg)
	if (avg)		if (avg)
	pct = 100.0*total/avg;		pct = 100.0*total/avg;

			if (csv_output)
			fprintf(stderr, "%s%.2f%%", csv_sep, pct);
			else
	fprintf(stderr, " ( +-%6.2f%% )", pct);		fprintf(stderr, " ( +-%6.2f%% )", pct);
	}		}

	@@ -882,13 +885,13 @@ static void print_counter_aggr(struct perf_evsel *counter)
	else		else
	abs_printout(-1, counter, avg);		abs_printout(-1, counter, avg);

			print_noise(counter, avg);

	if (csv_output) {		if (csv_output) {
	fputc('\n', stderr);		fputc('\n', stderr);
	return;		return;
	}		}

	print_noise(counter, avg);

	if (scaled) {		if (scaled) {
	double avg_enabled, avg_running;		double avg_enabled, avg_running;