linux-kernel - Re: [PATCH v2 17/19] perf, tools, stat: Support duration

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Message-ID: <20170828091931.GD4948@krava>
Date:   Mon, 28 Aug 2017 11:19:31 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH v2 17/19] perf, tools, stat: Support duration_time for
 metrics

On Fri, Aug 11, 2017 at 04:26:32PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> Some of the metrics formulas (like GFLOPs) need to know how long
> the measurement period is. Support an internal event called duration_time, which
> reports time in second. It maps to the dummy event, but is
> special cased for statistics to report the walltime duration.
> 
> So far it is not printed, but only used internally for metrics.
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  tools/perf/util/parse-events.l |  1 +
>  tools/perf/util/stat-shadow.c  | 17 +++++++++++++----
>  2 files changed, 14 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
> index fdb5bb52f01f..ea2426daf7e8 100644
> --- a/tools/perf/util/parse-events.l
> +++ b/tools/perf/util/parse-events.l
> @@ -288,6 +288,7 @@ cpu-migrations|migrations			{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COU
>  alignment-faults				{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
>  emulation-faults				{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
>  dummy						{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
> +duration_time					{ return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }

could you please use '-' (current style) instead of '_'

thanks,
jirka