From e779898aa74cd2e97216368b3f3689ceffe8aeed Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 7 Jun 2009 18:14:46 +0200 Subject: [PATCH] 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 Cc: Mike Galbraith Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo LKML-Reference: Signed-off-by: Ingo Molnar --- tools/perf/builtin-stat.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 184ff95ef4f5..80855090fd9f 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -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%%)", -- GitLab