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Commit 11ba2b85 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

perf stat: Print stalled cycles percentage 



Print:

           611,527 cycles
           400,553 instructions             # (  0.71 instructions per cycle )
            77,809 stalled-cycles           # ( 12.71% of all cycles )

        0.000610987  seconds time elapsed

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>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/n/tip-fd6x8r1cpyb6zhlrc4ix8m45@git.kernel.org
parent 5c543e3c

tools/perf/builtin-stat.c

+9 −2
Original line number Diff line number Diff line
@@ -442,7 +442,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) 
		if (total)

			ratio = avg / total;



		fprintf(stderr, " # %10.3f IPC  ", ratio);

		fprintf(stderr, " # ( %4.2f instructions per cycle )", ratio);

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

			runtime_branches_stats[cpu].n != 0) {

		total = avg_stats(&runtime_branches_stats[cpu]);
@@ -459,6 +459,13 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg) 
			ratio = 1000.0 * avg / total;



		fprintf(stderr, " # %10.3f M/sec", ratio);

	} else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES)) {

		total = avg_stats(&runtime_cycles_stats[cpu]);



		if (total)

			ratio = avg / total * 100.0;



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

	}

}