From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jiri Olsa <jolsa@redhat.com>
Subject: Re: User defined metrics for perf stat?
Date: Wed, 3 Feb 2016 15:11:57 +0100
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To: Milian Wolff <milian.wolff@kdab.com>
Cc: Andreas Hollmann <hollmann@in.tum.de>, Arnaldo Carvalho de Melo <acme@kernel.org>, Jiri Olsa <jolsa@kernel.org>, "linux-perf-use." <linux-perf-users@vger.kernel.org>

On Wed, Feb 03, 2016 at 01:39:20PM +0100, Milian Wolff wrote:
> On Tuesday, February 2, 2016 9:58:02 AM CET Jiri Olsa wrote:
> > On Tue, Feb 02, 2016 at 12:33:51AM +0100, Andreas Hollmann wrote:
> > > Thanks, this is what I was looking for!
> > > 
> > > Why was the formula language abandoned? To restricted?
> > > It would be still useful for interval prints.
> > 
> > yea the python script interface is way more powerful
> > then whatever we would come with
> 
> How does this compare to the ongoing eBPF effort? Will we be able to do eBPF 
> based in-kernel aggregation for perf stat in the future?

hum, not sure what you mean by that, however this is
all user level scripting support to allow user defined
metrics/ratios from perf counters, more info ine here:
  http://marc.info/?l=linux-kernel&m=145207742329050&w=2

jirka