linux-kernel - Re: [PATCH] perf report: Add option to collapse undesired parts of call graph

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Date:	Mon, 24 Jun 2013 18:50:30 -0400
From:	Greg Price <price@....EDU>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>, David Ahern <dsahern@...il.com>
Subject: Re: [PATCH] perf report: Add option to collapse undesired parts of
 call graph

On Sun, Jun 23, 2013 at 11:53:27PM +0200, Jiri Olsa wrote:
> Seems useful, sort of oposite to parent option (-p)

Cool, good to hear.


> Any reason why not add this for top?

Only because I didn't think about it. :)  Seems like a good idea; I'll
add that.


> > diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> > index b2ecad6..a14489c 100644
> > --- a/tools/perf/util/machine.c
> > +++ b/tools/perf/util/machine.c
> > @@ -11,6 +11,10 @@
> >  #include <stdbool.h>
> >  #include "unwind.h"
> >  
> > +regex_t blackbox_regex;
> > +const char *blackbox_pattern;
> > +int have_blackbox = 0;
> 
> util/sort.c mich be better place for this

Sure, happy to put it there.


> It could also make sense to allow sorting on this
> the same way as we do for '-s parent' and report only
> '[other]' and 'blackbox' entries.

Could be.  My inclination would be to wait for someone to show up
wanting to use that functionality, because it's not yet obvious to me
why it will be useful.


> Also I dont like the 'blackbox' option name, it should
> complement the parent option somehow.. but no idea ;-)

OK, I'll think of some alternative possible names.


Thanks for the review!

Cheers,
Greg
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