linux-kernel - Re: [PATCHv4 00/57] perf stat: Add scripting support

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Message-ID: <20151021102215.GA27311@krava.redhat.com>
Date:	Wed, 21 Oct 2015 12:22:15 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...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>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Liang, Kan" <kan.liang@...el.com>
Subject: Re: [PATCHv4 00/57] perf stat: Add scripting support

On Wed, Oct 21, 2015 at 11:03:57AM +0900, Namhyung Kim wrote:
> Hi Jiri,
> 
> On Fri, Oct 16, 2015 at 12:40:35PM +0200, Jiri Olsa wrote:
> > hi,
> > sending another version of stat scripting.
> > 
> > v4 changes:
> >   - added attr update event for event's cpumask
> >   - forbig aggregation on task workloads
> >   - some minor reorders and changelog fixes
> > 
> > v3 changes:
> >   - added attr update event to handle unit,scale,name for event
> >     it fixed the uncore_imc_1/cas_count_read/ record/report
> >   - perf report -D now displays stat related events
> >   - some minor and changelog fixes
> > 
> > v2 changes:
> >   - rebased to latest Arnaldo's perf/core
> >   - patches 1 to 11 already merged in
> >   - added --per-core/--per-socket/-A options for perf stat report
> >     command to allow custom aggregation in stat report, please
> >     check new examples below
> >   - couple changelogs changes
> > 
> > The initial attempt defined its own formula lang and allowed
> > triggering user's script on the end of the stat command:
> >   http://marc.info/?l=linux-kernel&m=136742146322273&w=2
> > 
> > This patchset abandons the idea of new formula language
> > and rather adds support to:
> >   - store stat data into perf.data file
> >   - add python support to process stat events
> > 
> > Basically it allows to store stat data into perf.data and
> > post process it with python scripts in a similar way we
> > do for sampling data.
> 
> Nice.  I didn't review this patchset (yet) but I have a feature
> request. :)  It'd be great if we have 'perf stat diff' to compare two
> (or more) files in some way.

yep, I plan to do stat diff

jirka
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