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Commit e779898a authored by Ingo Molnar's avatar Ingo Molnar
Browse files

perf stat: Print out instructins/cycle metric 



Before:

     7549326754  cycles               #    3201.811 M/sec
    10007594937  instructions         #    4244.408 M/sec

After:

     7542051194  cycles               #    3201.996 M/sec
    10007743852  instructions         #    4248.811 M/sec # 1.327 per cycle

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a14832ff

tools/perf/builtin-stat.c

+11 −0
Original line number Diff line number Diff line
@@ -83,6 +83,7 @@ static __u64 event_scaled[MAX_COUNTERS]; 


static __u64			runtime_nsecs;

static __u64			walltime_nsecs;

static __u64			runtime_cycles;



static void create_perf_stat_counter(int counter)

{
@@ -177,6 +178,9 @@ static void read_counter(int counter) 
	if (attrs[counter].type == PERF_TYPE_SOFTWARE &&

		attrs[counter].config == PERF_COUNT_TASK_CLOCK)

		runtime_nsecs = count[0];

	if (attrs[counter].type == PERF_TYPE_HARDWARE &&

		attrs[counter].config == PERF_COUNT_CPU_CYCLES)

		runtime_cycles = count[0];

}



/*
@@ -214,6 +218,13 @@ static void print_counter(int counter) 
		if (runtime_nsecs)

			fprintf(stderr, " # %11.3f M/sec",

				(double)count[0]/runtime_nsecs*1000.0);

		if (runtime_cycles &&

			attrs[counter].type == PERF_TYPE_HARDWARE &&

				attrs[counter].config == PERF_COUNT_INSTRUCTIONS) {



			fprintf(stderr, " # %1.3f per cycle",

				(double)count[0] / (double)runtime_cycles);

		}

	}

	if (scaled)

		fprintf(stderr, "  (scaled from %.2f%%)",