Commit d73515c0 authored by Andi Kleen's avatar Andi Kleen Committed by Arnaldo Carvalho de Melo
Browse files

perf stat: Output running time and run/enabled ratio in CSV mode 



The information how much a counter ran in 'perf stat' can be quite
interesting for other tools to judge how trustworthy a measurement is.

Currently it is only output in non CSV mode.

This patches make perf stat always output the running time and the
enabled/running ratio in CSV mode.

This adds two new fields at the end for each line. I assume that
existing tools ignore new fields at the end, so it's on by default.

Only CSV mode is affected, no difference otherwise.

v2: Add extra print_running function
v3: Avoid printing nan
v4: Remove some elses and add brackets.
v5: Move non CSV case into print_running

Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Reviewed-by: default avatarJiri Olsa <jolsa@redhat.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1426083387-17006-1-git-send-email-andi@firstfloor.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 4fabf3d1

tools/perf/builtin-stat.c

+25 −23
Original line number Diff line number Diff line
@@ -769,6 +769,19 @@ static int run_perf_stat(int argc, const char **argv) 
	return ret;

}



static void print_running(u64 run, u64 ena)

{

	if (csv_output) {

		fprintf(output, "%s%" PRIu64 "%s%.2f",

					csv_sep,

					run,

					csv_sep,

					ena ? 100.0 * run / ena : 100.0);

	} else if (run != ena) {

		fprintf(output, "  (%.2f%%)", 100.0 * run / ena);

	}

}



static void print_noise_pct(double total, double avg)

{

	double pct = rel_stddev_stats(total, avg);
@@ -1252,6 +1265,7 @@ static void print_aggr(char *prefix) 
					fprintf(output, "%s%s",

						csv_sep, counter->cgrp->name);



				print_running(run, ena);

				fputc('\n', output);

				continue;

			}
@@ -1262,13 +1276,10 @@ static void print_aggr(char *prefix) 
			else

				abs_printout(id, nr, counter, uval);



			if (!csv_output) {

			if (!csv_output)

				print_noise(counter, 1.0);



				if (run != ena)

					fprintf(output, "  (%.2f%%)",

						100.0 * run / ena);

			}

			print_running(run, ena);

			fputc('\n', output);

		}

	}
@@ -1284,6 +1295,10 @@ static void print_counter_aggr(struct perf_evsel *counter, char *prefix) 
	double avg = avg_stats(&ps->res_stats[0]);

	int scaled = counter->counts->scaled;

	double uval;

	double avg_enabled, avg_running;



	avg_enabled = avg_stats(&ps->res_stats[1]);

	avg_running = avg_stats(&ps->res_stats[2]);



	if (prefix)

		fprintf(output, "%s", prefix);
@@ -1303,6 +1318,7 @@ static void print_counter_aggr(struct perf_evsel *counter, char *prefix) 
		if (counter->cgrp)

			fprintf(output, "%s%s", csv_sep, counter->cgrp->name);



		print_running(avg_running, avg_enabled);

		fputc('\n', output);

		return;

	}
@@ -1316,19 +1332,7 @@ static void print_counter_aggr(struct perf_evsel *counter, char *prefix) 


	print_noise(counter, avg);



	if (csv_output) {

		fputc('\n', output);

		return;

	}



	if (scaled) {

		double avg_enabled, avg_running;



		avg_enabled = avg_stats(&ps->res_stats[1]);

		avg_running = avg_stats(&ps->res_stats[2]);



		fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);

	}

	print_running(avg_running, avg_enabled);

	fprintf(output, "\n");

}
@@ -1370,6 +1374,7 @@ static void print_counter(struct perf_evsel *counter, char *prefix) 
				fprintf(output, "%s%s",

					csv_sep, counter->cgrp->name);



			print_running(run, ena);

			fputc('\n', output);

			continue;

		}
@@ -1381,13 +1386,10 @@ static void print_counter(struct perf_evsel *counter, char *prefix) 
		else

			abs_printout(cpu, 0, counter, uval);



		if (!csv_output) {

		if (!csv_output)

			print_noise(counter, 1.0);

		print_running(run, ena);



			if (run != ena)

				fprintf(output, "  (%.2f%%)",

					100.0 * run / ena);

		}

		fputc('\n', output);

	}

}

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