linux-kernel - Re: [PATCHv9 0/3] perf stat: Add scripting support

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Date:	Wed, 6 Jan 2016 15:38:53 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, Andi Kleen <andi@...stfloor.org>,
	Ulrich Drepper <drepper@...il.com>,
	Will Deacon <will.deacon@....com>,
	Stephane Eranian <eranian@...gle.com>,
	Don Zickus <dzickus@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Liang, Kan" <kan.liang@...el.com>
Subject: Re: [PATCHv9 0/3] perf stat: Add scripting support

On Wed, Jan 06, 2016 at 11:18:02AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jan 06, 2016 at 11:49:54AM +0100, Jiri Olsa escreveu:
> > hi,
> > sending another version of stat scripting.
>  
> > v9 changes:
> >   - rebased on top of accepted patches
> >   - desribed CPI metric in changelog [Arnaldo]
> >   - fixed cpu conversion [Arnaldo]
> 
> Thanks, applied. Testing the cpi script with an endless:
> 
> perf stat record -I 1000 -a | perf script -s ~acme/git/linux/tools/perf/scripts/python/stat-cpi.py
>      187.151796: cpu -1, thread -1 -> cpi 0.797917 (2568467461/3218963700)
>      188.151979: cpu -1, thread -1 -> cpi 0.734628 (2714373371/3694892981)
>      189.152212: cpu -1, thread -1 -> cpi 0.753332 (2958819204/3927644236)
>      190.152975: cpu -1, thread -1 -> cpi 1.587754 (202360895/127451009)
>      191.153486: cpu -1, thread -1 -> cpi 1.558219 (290557309/186467579)
> 
> in one monitor while trying various workloads in another, to see how it reacts,
> and after a while those raw numbers at the end of each line become just noise,
> I think they should be shown only under 'stat-cpy -v' (I think we can pass args
> to the 'perf script' scripts, right?
> 
> Also the 'cpu', 'thread' and '-> cpi' could be turned into headers, like 'perf
> stat' does?
> 
> Anyway, you called it 'example script' and we can improve it on top of what I
> pushed to perf/core, i.e. this patchkit, unchanged, thanks!

yep, it's just noise and it's just an example to show
how the stat scripting works.. we can tune it up with
more ratios ;-)

jirka
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