linux-kernel - Re: [PATCH 13/16] perf callchain: Switch default to 'graph,0.5,caller'

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Message-ID: <20151021132440.GF10639@kernel.org>
Date:	Wed, 21 Oct 2015 10:24:40 -0300
From:	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Chandler Carruth <chandlerc@...il.com>,
	Brendan Gregg <brendan.d.gregg@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Borislav Petkov <bp@...e.de>, David Ahern <dsahern@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>,
	Taeung Song <treeze.taeung@...il.com>
Subject: Re: [PATCH 13/16] perf callchain: Switch default to
 'graph,0.5,caller'

Em Wed, Oct 21, 2015 at 10:21:36AM +0900, Namhyung Kim escreveu:
> On Tue, Oct 20, 2015 at 03:44:04PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Oct 20, 2015 at 07:21:16PM +0200, Frederic Weisbecker escreveu:
> > > On Tue, Oct 20, 2015 at 10:06:51AM -0300, Arnaldo Carvalho de Melo wrote:
> > And I noticed some other shortcoming of this ordering (caller) the stack
> > closer to userspace in a typical perf.data with callchains (perf record
> > -g) can have bogus addresses (-fomit-frame-pointer) :-\
 
> Maybe we need to add an option to ignore unresolved callchains?

We have:

    -U, --hide-unresolved
                          Only display entries resolved to a symbol

But I think the problem here is different, its not about unresolved
stuff, its about invalid addresses, no?

- Arnaldo
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