linux-kernel - Re: [PATCH 2/3] perf: Add support for extra parameters for raw events

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Date:	Fri, 12 Nov 2010 11:27:49 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
	fweisbec@...il.com, mingo@...e.hu, acme@...hat.com,
	eranian@...gle.com
Subject: Re: [PATCH 2/3] perf: Add support for extra parameters for raw
 events

On Thu, Nov 11, 2010 at 09:37:38PM +0100, Peter Zijlstra wrote:
> On Thu, 2010-11-11 at 21:12 +0100, Andi Kleen wrote:
> > > Also, I think we can use the same mechanism to program the
> > > PEBS-load-latency MSR, right?
> > 
> > I haven't looked at that, but if it's a per core resource
> > the infrastructure can be reused at least. 
> 
> Can't remember if the load-latency msr is per-core, but its an extra reg
> that needs to be set.

Ok. I guess it shouldn't be too hard to add.

Load-latency is pretty useful too.

> 
> The nhm/wsm LBR config msr is per-core though, so that could use your
> infrastructure too.

Stephane mentioned that too. Not right now, but perhaps later I'll
look at using this.

-Andi


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