linux-kernel - Re: [PATCH v1 3/5] perf, tools, script: Allow printing period for non freq mode groups

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Date:   Mon, 13 Nov 2017 15:23:46 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Andi Kleen <andi@...stfloor.org>, jolsa@...nel.org,
        linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH v1 3/5] perf, tools, script: Allow printing period for
 non freq mode groups

Em Mon, Nov 13, 2017 at 10:11:58AM +0100, Jiri Olsa escreveu:
> On Thu, Nov 09, 2017 at 06:55:26AM -0800, Andi Kleen wrote:
> > From: Andi Kleen <ak@...ux.intel.com>
> > 
> > When using leader sampling the values of the not sampled but counted
> > events are shown by perf script in "period".
> > 
> > Currently printing period is only allowed when the main event
> > has a period, that is it is in frequency mode.
> > 
> > This implies that we cannot dump the values of counted events
> > when the leader event is not in frequency mode.
> > 
> > Just remove the check that the period must be set on all
> > events. It will just be printed as 0 instead if it's not
> > available.
> 
> it'll be the value of configured period, not 0
> 
> int perf_evsel__parse_sample(struct ...
>   ...
>   data->period = evsel->attr.sample_period;
> 
>   $ perf record -c 100000 
>   $ perf script -F event,period | head -3
>   Failed to open /tmp/perf-2048.map, continuing without symbols
>       100000 cycles:ppp: 
>       100000 cycles:ppp: 
> 
> 
> other than that I think we can remove that check,
> because we will have always sane number in period
> 
> Acked-by: Jiri Olsa <jolsa@...nel.org>

Applied, after adding your comments.

- Arnaldo