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Date: Wed, 21 Oct 2015 11:03:57 +0900
From: Namhyung Kim <namhyung@kernel.org>
To: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
        Andi Kleen <andi@firstfloor.org>, Ulrich Drepper <drepper@gmail.com>,
        Will Deacon <will.deacon@arm.com>,
        Stephane Eranian <eranian@google.com>, Don Zickus <dzickus@redhat.com>,
        lkml <linux-kernel@vger.kernel.org>, David Ahern <dsahern@gmail.com>,
        Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        "Liang, Kan" <kan.liang@intel.com>
Subject: Re: [PATCHv4 00/57] perf stat: Add scripting support
Message-ID: <20151021020357.GD628@sejong>
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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.

Thanks,
Namhyung