linux-kernel - Re: [PATCH] perf, tools: Always use non inlined file name for srcfile

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Message-ID: <20150901192144.GA25466@kernel.org>
Date:	Tue, 1 Sep 2015 16:21:44 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	jolsa@...nel.org
Subject: Re: [PATCH] perf, tools: Always use non inlined file name for srcfile

Em Tue, Sep 01, 2015 at 11:48:39AM -0700, Andi Kleen escreveu:
> On Tue, Sep 01, 2015 at 03:36:57PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Sep 01, 2015 at 11:11:42AM -0700, Andi Kleen escreveu:
> > > From: Andi Kleen <ak@...ux.intel.com>
> > > 
> > > When profiling the kernel with srcfile it's common to "get
> > > stuck" in include. For example a lot of code uses current
> > > or other inlines, so they get accounted to some random
> > > include file. This is not very useful as a high level
> > > categorization.
> > 
> > Cool idea :-)
> 
> Yes.
> 
> It would be also nice to use this information for unwinding
> (so to show the inline stack as part of the call graph)

Yes, agreed.

> > Why not the so much simpler:
> > 
> > 		while (bfd_find_inliner_info(...));
> > 
> > But other than that, wouldn't be better to put an upper limit on this?
> > 
> > Say, 1024 levels of unwinding to avoid tripping in some bfd lib bug that
> > could make this function always return true and make addr2line get stuck
> > in an infinite loop?
> 
> Done. I sent a v2.

Thanks, I applied v2.

- Arnaldo
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