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

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Date:	Tue, 19 Jan 2016 18:03:39 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Andi Kleen <andi@...stfloor.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 07:45:06PM +0900, Namhyung Kim escreveu:
> Hi Andi,
> 
> On Sun, Jan 17, 2016 at 08:31:53PM +0100, Andi Kleen wrote:
> > On Sun, Jan 17, 2016 at 01:03:00AM +0900, Namhyung Kim wrote:
> > > Hello,
> > > 
> > > This is v2 attempt of my earlier patchset [1].  This patchset
> > > implements a new feature that collects hist entries in a hierachical
> > > manner.  That means lower-level entries belong to an upper-level
> > > entry.  The entry hierachy is built on the sort keys given, so users
> > > can set it whatever they want.  It only shows top-level entries first,
> > > and user can expand/collapse it dynamically.
> > 
> > Thanks that's very nice. Especially for TSX profiling it was always
> > very annoying that the other sort keys didn't actually sort.
> > It should be very useful for LBR view too.
> 
> Glad to hear that you like it. :)
> 
> 
> > 
> > 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?

Yeah, please elaborate, I'm testing:

perf top -s comm,dso,sym --hierarchy --percent-limit 0.5


And it seems to work...

- Arnaldo