linux-kernel - Re: [PATCH 10/10] perf, tools, stat: Add extra output of counter values with -vv

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Date:	Thu, 12 May 2016 10:03:43 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, peterz@...radead.org, jolsa@...nel.org,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 10/10] perf, tools, stat: Add extra output of counter
 values with -vv

On Thu, May 05, 2016 at 04:04:07PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> Add debug output of raw counter values per CPU when
> perf stat -v is specified, together with their cpu numbers.
> This is very useful to debug problems with per core counters,
> where we can normally only see aggregated values.
> 
> v2: Make it depend on -vv, not -v
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  tools/perf/builtin-stat.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 707eef9314da..7c5c50b61b28 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -313,6 +313,14 @@ static int read_counter(struct perf_evsel *counter)
>  					return -1;
>  				}
>  			}
> +
> +			if (verbose > 1) {
> +				fprintf(stat_config.output,
> +					"%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
> +						perf_evsel__name(counter),
> +						cpu,
> +						count->val, count->ena, count->run);
> +			}

hi,
we already have similar output for aggregated counters,
could you please consider something like below to clearly
separate them?

[root@...-x3650m4-01 perf]# ./perf stat  -e cycles -I 1000 -vv -a -C 0,1
...
cycles: CPU 0: 1298783264 1000126956 1000126956
cycles: CPU 1: 1298791660 1000134589 1000134589
cycles: AGGR: 2597574924 2000261545 2000261545
...

thanks,
jirka


---
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 7c5c50b61b28..bd0d67ebb757 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -316,7 +316,7 @@ static int read_counter(struct perf_evsel *counter)
 
 			if (verbose > 1) {
 				fprintf(stat_config.output,
-					"%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
+					"%s: CPU %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 						perf_evsel__name(counter),
 						cpu,
 						count->val, count->ena, count->run);
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index c1ba255f2abe..5ddeea1399ee 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -345,7 +345,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
 		update_stats(&ps->res_stats[i], count[i]);
 
 	if (verbose) {
-		fprintf(config->output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
+		fprintf(config->output, "%s: AGGR: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 			perf_evsel__name(counter), count[0], count[1], count[2]);
 	}