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Commit c78df6c1 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

perf stat: Print branch misses warning colors 



Print the missed-branches percentage with different warning level ASCII colors,
as the percentage passes the 5%/10%/20% thresholds.

These thresholds are set to relatively low levels, because on most CPUs even a
moderate percentage of branch-misses already shows up as a slowdown.

Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-ybqukg7p86leiup7gl03ecgk@git.kernel.org


Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a5d243d0

tools/perf/builtin-stat.c

+24 −7
Original line number Diff line number Diff line
@@ -450,6 +450,29 @@ static void print_stalled_cycles(int cpu, struct perf_evsel *evsel __used, doubl 
	fprintf(stderr, " of all cycles are idle ");

}



static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)

{

	double total, ratio = 0.0;

	const char *color;



	total = avg_stats(&runtime_branches_stats[cpu]);



	if (total)

		ratio = avg / total * 100.0;



	color = PERF_COLOR_NORMAL;

	if (ratio > 20.0)

		color = PERF_COLOR_RED;

	else if (ratio > 10.0)

		color = PERF_COLOR_MAGENTA;

	else if (ratio > 5.0)

		color = PERF_COLOR_YELLOW;



	fprintf(stderr, " #   ");

	color_fprintf(stderr, color, "%5.2f%%", ratio);

	fprintf(stderr, " of all branches        ");

}



static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)

{

	double total, ratio = 0.0;
@@ -495,13 +518,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) 


	} else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&

			runtime_branches_stats[cpu].n != 0) {

		total = avg_stats(&runtime_branches_stats[cpu]);



		if (total)

			ratio = avg * 100 / total;



		fprintf(stderr, " #   %5.2f  %% of all branches      ", ratio);



		print_branch_misses(cpu, evsel, avg);

	} else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&

			runtime_cacherefs_stats[cpu].n != 0) {

		total = avg_stats(&runtime_cacherefs_stats[cpu]);