linux-kernel - Re: [PATCH] perf, tools, report: Add support for srcfile sort key

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Date:	Sat, 8 Aug 2015 14:28:03 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	jolsa@...nel.org, namhyung@...nel.org,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf, tools, report: Add support for srcfile sort key

Em Sat, Aug 08, 2015 at 04:27:35AM +0200, Andi Kleen escreveu:
> On Fri, Aug 07, 2015 at 09:02:15PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Fri, Aug 07, 2015 at 08:51:45PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Fri, Aug 07, 2015 at 03:54:24PM -0700, Andi Kleen escreveu:
> > > > From: Andi Kleen <ak@...ux.intel.com>
> > > > 
> > > > In some cases it's useful to characterize samples by file. This is useful
> > > > to get a higher level categorization, for example to map cost to
> > > > subsystems.
> > > > 
> > > > Add a srcfile sort key to perf report. It builds on top of the existing
> > > > srcline support.
> > > 
> > > Applied
> > 
> > Humm, holding this up a bit, further testing showed some oddities,
> > fedora21, the width of the column is being limited to the lenght of the
> > header
> 
> Yes I've seen that, I just use -w normally. It also happens with --sort
> srcline. The column sizing code could probably be somewhat smarter and
> always allow the last column to become as wide as needed. But that's

Right, I'll check that, there is code for figuring that out, I'll see
what is missing.

> something that should be done separately; I don't think it belongs
> into this patch.

I can agree with that, will add it, as it provides value as-is.
 
> > and there are some DWARF errors, have you noticed those?
 
> No I didn't. Some generic issue, likely happening with srcline and
> perhaps even objdump -S too. Find out with strace what file it is.

Ok.

- Arnaldo
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