linux-kernel - Re: Cycles annotation support for perf tools

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Message-ID: <20150524191944.GI19417@two.firstfloor.org>
Date:	Sun, 24 May 2015 21:19:44 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, acme@...nel.org,
	linux-kernel@...r.kernel.org, namhyung@...nel.org,
	eranian@...gle.com
Subject: Re: Cycles annotation support for perf tools

On Sun, May 24, 2015 at 08:55:00PM +0200, Jiri Olsa wrote:
> On Sun, May 10, 2015 at 06:51:56AM -0700, Andi Kleen wrote:
> > The upcoming Skylake CPU has a new timed branch stack feature,
> > that reports cycle counts for individual branches in the
> > last branch record.
> > 
> > This allows to get fine grained cost information for code, and also allows
> > to compute fine grained IPC.
> > 
> > This patchkit adds support for this in the perf tools:
> > - Basic support for the cycles field like other branch fields
> > - Show cycles in the standard branch sort view (no IPC here,
> >   as IPC needs the instruction counts from annotation)
> > - Annotate cycles and IPC in the assembler annotate view
> > - Add branch support to top, so we can do live annotation.
> > - Misc support, like dumping it in perf report -D
> 
> hi,
> do you have a branch with this change?

git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc perf/skl-tools1

This version contains one bugfix over the posted version.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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