linux-kernel - Re: Fwd: perf: callchain feature on ARM

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Message-ID: <20130830115632.GB9218@krava.brq.redhat.com>
Date:	Fri, 30 Aug 2013 13:56:32 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Jean Pihet <jean.pihet@...aro.org>
Cc:	David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: Fwd: perf: callchain feature on ARM - question about libunwind
 API

On Fri, Aug 30, 2013 at 01:49:03PM +0200, Jiri Olsa wrote:
> On Thu, Aug 29, 2013 at 07:15:00PM +0200, Jean Pihet wrote:
> 
> SNIP
> 
> > 
> > The problem is that it is slow as hell (couple of minutes to report
> > the callchain from a simple test app ;-|). I will look at the sampling
> > rate and the caching next.
> 
> FYI there's elfutils alternative grewing now via libdw providing
> API to do the 'remote unwind' as in libunwind. I'm not completely
> sure, but I think it should support both .eh_frames and .debug_frames.

ok, I checked and it does ;)
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