linux-kernel - Re: [RFC/PATCHSET 00/17] perf tools: Add support for hierachy view (v2)

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Date:	Tue, 19 Jan 2016 19:24:49 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Namhyung Kim <namhyung@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>,
	Don Zickus <dzickus@...hat.com>,
	Pekka Enberg <penberg@...nel.org>,
	Moinuddin Quadri <moin18@...il.com>
Subject: Re: [RFC/PATCHSET 00/17] perf tools: Add support for hierachy view
 (v2)

Em Tue, Jan 19, 2016 at 11:12:04PM +0100, Andi Kleen escreveu:
> > > Now we only need a better percent-limit that handles all
> > > leaves correctly...
> > 
> > Hmm.. could you tell me where the percent-limit doesn't work
> > correctly?
> 
> It doesn't work well together with call chains.

Ok, that is the missing piece of info, lemme check... Yeah that seems
to be the case.
 
> It only considers the hits on the leaf function, but doesn't hide
> the individual call chains leading to that function which are below
> the limit.
> 
> So if you have a lot of different cold callers you still end up
> with far too much output.
> 
> Also would be nice to be able to set it dynamically from the UI.

To set the mim percent? Yeah, we need to allow setting all those knobs
from the UI.

I.e. should be like when we press '/' to set a substring filter.

- Arnaldo