linux-kernel - Re: [PATCH v2] perf report: distinguish between inliners in the same function

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Date:   Mon, 15 May 2017 09:44:30 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     Milian Wolff <milian.wolff@...b.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        David Ahern <dsahern@...il.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Yao Jin <yao.jin@...ux.intel.com>, kernel-team@....com
Subject: Re: [PATCH v2] perf report: distinguish between inliners in the same
 function

Hi Andi,

On Fri, May 12, 2017 at 07:55:13AM -0700, Andi Kleen wrote:
> Milian Wolff <milian.wolff@...b.com> writes:
> >
> > I think I'm missing something, but isn't this what this function provides? The 
> > function above is now being used by the match_chain_inliner function below. 
> >
> > Ah, or do you mean for code such as this:
> >
> > ~~~~~
> > inline_func_1(); inline_func_2();
> 
> This could be handled by looking at columns or discriminators too (which
> some compilers generate in dwarf). srcline.c would need to be changed
> to also call bfd_get_nearest_discriminator() and pass that extra
> information everywhere.

You're right.  The discriminators should be carried too.

Thanks,
Namhyung