linux-kernel - Re: State of "perf: Add a new sort order: SORT

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Date:	Mon, 28 Oct 2013 09:29:55 +0000
From:	Rodrigo Campos <rodrigo@...g.com.ar>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	namhyung.kim@....com, linux-kernel@...r.kernel.org,
	acme@...stprotocols.net, asharma@...com, fweisbec@...il.com
Subject: Re: State of "perf: Add a new sort order: SORT_INCLUSIVE"

On Mon, Oct 28, 2013 at 06:09:30PM +0900, Namhyung Kim wrote:
> On Mon, 28 Oct 2013 08:42:44 +0000, Rodrigo Campos wrote:
> > On Mon, Oct 28, 2013 at 02:09:49PM +0900, Namhyung Kim wrote:
> >> Anyway, You can find the series and discussion on the link below:
> >> 
> >>   https://lkml.org/lkml/2012/9/13/81
> >
> > I've read the cover letter for that series and probably because I don't know
> > about perf internals I have a question: How will "--culumate" interact with
> > "--sort=dso" for example ?
> >
> > I mean, is it possible for that to show more than 100% ? (if you add all the
> > 93.35% in your example in the cover letter, or something similar). Or
> > "--culumate --sort=dso" will just group together all entries that have a dso in
> > the call chain ?
> 
> Hmm.. I think --cumulate option is only meaningful when sort order
> includes symbol.  Maybe I can add support for --sort=dso case as well
> but not sure it's worth.  Do you think it's really needed?

I don't know if it is *needed*, but that was what I need :)

I mean, what I was looking for is a way to know the percentage spent when some
symbol in the call chain belongs to a DSO. Like group all samples that have a
symbol of a DSO in the callchain, and know the percentage for that group.
Something like the "inclusive" time spent inside a library.


> > Sorry if the question was too obvious if I knew about perf internals :S
> 
> No need to sorry about it. :)

Thanks =)




Thanks again,
Rodrigo
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