linux-kernel - Re: [PATCHv2 00/14] perf diff: Factor diff command

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Message-ID: <20121001081631.GB991@krava.brq.redhat.com>
Date:	Mon, 1 Oct 2012 10:16:31 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCHv2 00/14] perf diff: Factor diff command

On Thu, Sep 27, 2012 at 11:31:02PM +0200, Andi Kleen wrote:
> On Thu, Sep 27, 2012 at 01:09:21PM +0200, Jiri Olsa wrote:
> > hi,
> > this is v2 of diff command changes proposed in here:
> > https://lkml.org/lkml/2012/9/6/344
> > 
> > It's now rebased on new hists hpp* interface plus few
> > more additional changes.
> 
> FWIW I've been playing around with it a bit. It seems useful
> both for scaling problems and likely for performance regression tracking too.

cool ;)

> 
> Some minor issues I ran into (but no show stoppers):
> - The error messages for bad -c expressions could be better
> - I found the requirement for no space after -c unintuitive.

I'll see to that

> - It would be nice to have support for doing the bucketizing per line
> instead of per function. With a large function and/or inlining 
> it's sometimes hard to identify the actual problem
> Acme recently added this for perf report.

hm, I missed this one.. hopefully it should be no problem to add it

thanks for testing this!
jirka
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