linux-kernel - Re: [PATCH 3/3] perf tool: Add non arch events for SandyBridge microarchitecture

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Date:	Fri, 21 Dec 2012 20:58:12 -0500 (EST)
From:	Vince Weaver <vince@...ter.net>
To:	Andi Kleen <andi@...stfloor.org>
cc:	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 3/3] perf tool: Add non arch events for SandyBridge
 microarchitecture

On Fri, 21 Dec 2012, Andi Kleen wrote:

> > I hate to sound like a broken record here, but, again, what's the 
> > rationalization for not using libpfm4 here?
> 
> Personally I always hated the libpfm4 syntax. It's even worse than
> oprofile.

how so?  The libpfm4 event names are more or less the same as that from 
the manuals with the exception that . is replaced with : in some cases.

> I'm probably biased, but it's usually best to use the format the CPU
> vendor releases the original event tables in. That gives you
> the fastest access with the minimum amount of hazzle.

Which vendors provide "original tables"?  None as far as I know, you are 
stuck digging through PDFs.

Unless you mean the tables that come with Vtune... are those licensed in a 
way that is useful?

libpfm4 also provides at least minimal event descriptions along with each 
event, will the kernel/perf provide those too?

Vince
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