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

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Message-ID: <20101112104804.GB8020@basil.fritz.box>
Date:	Fri, 12 Nov 2010 11:48:04 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	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
Subject: Re: [PATCH 2/3] perf: Add support for extra parameters for raw
 events

> I don't think you need special syntax. You can simply come up with
> the 64-bit raw hex value. corey recently added a small utility to do
> this via libpfm4: perf stat -e `evt2raw unhalted_core_cycles:u` ....

I added a small patch to perf to read event mappings from a flat mapping file.

> > Also, I think we can use the same mechanism to program the
> > PEBS-load-latency MSR, right?
> >
> Yes, we could hardcode the latency the same way.

At least right now it would still need a constraint, because only
one counter can use it. 

-Andi

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