linux-kernel - Re: Implement lbr-as-callgraph v10

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Message-ID: <20141119214822.GM12538@two.firstfloor.org>
Date:	Wed, 19 Nov 2014 22:48:22 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
	Andi Kleen <andi@...stfloor.org>, Jiri Olsa <jolsa@...nel.org>,
	linux-kernel@...r.kernel.org, "Liang, Kan" <kan.liang@...el.com>
Subject: Re: Implement lbr-as-callgraph v10

On Wed, Nov 19, 2014 at 01:04:58PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Nov 19, 2014 at 11:10:27AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Wed, Nov 19, 2014 at 11:54:50AM +0100, Jiri Olsa escreveu:
> > > > > BUILD_BUG_ON then?
> > > > 
> > > > sounds gut
> > > 
> > > hum, acme/perf/core changed and so has the compile error ;-)
> > > we dont overload the <linux/bug.h>, so the kernel one got
> > > included, which is wrong.. attached patch fixes that
> > 
> > I had fixed this but not force pushed out, sorry.
> > 
> > Now I mistakenly tried running:
> > 
> > perf report --stdio --no-children --branch-history
> > 
> > on a file that has no BRANCH_STACK, i.e. a perf.data file on a wrong

It works with -g.
Without -g it will just give an error message. I think that is ok, isn't it?

> > directory since I'm comparing the output of --stdio, --tui and --gtk,
> > since it looks --gtk is wrong, still unsure about what the problem is in
> > that case, but stumbled on:
> > 
> 
> I need to investigate this further, so I created a perf/branch-history
> branch that has the patches I need to test more rebased on top of my
> perf/core branch I just pushed out to Ingo.


I tested --gtk and I don't see any differences to the console mode
with --branch-history.  What problem do you see?

-Andi
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