linux-kernel - Re: [PATCH 1/4] perf,x86: De-obfuscate HSW offcore bits

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Message-ID: <20141023131321.GK3219@twins.programming.kicks-ass.net>
Date:	Thu, 23 Oct 2014 15:13:21 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	mingo@...nel.org, tglx@...utronix.de, ak@...ux.intel.com,
	eranian@...gle.com, dzickus@...hat.com, andi@...stfloor.org,
	jmario@...hat.com, acme@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] perf,x86: De-obfuscate HSW offcore bits

On Thu, Oct 23, 2014 at 02:16:19PM +0200, Borislav Petkov wrote:
> On Thu, Oct 23, 2014 at 12:51:20PM +0200, Peter Zijlstra wrote:
> > Andi introduced the HSW cache events array, but used magic constants
> > against convention as set by all the other uarchs. Try and deobfuscate
> > these a bit.
> > 
> > This patch should not change the actual values generated; however
> > weird they seems.
> > 
> > In that patch Andi also said there were differences between the
> > SNB/IVB and HSW/BDW offcore tables but failed to specify which and
> > why.
> > 
> > Fixes: 86a349a28b24 ("perf/x86/intel: Add Broadwell core support")
> > Cc: Andi Kleen <ak@...ux.intel.com>
> > Cc: Stephane Eranian <eranian@...gle.com>
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> > Link: http://lkml.kernel.org/n/tip-@git.kernel.org
> 
> This link looks funny.

Yes it does, I seem to have not isntalled rndpwd or whatever that script
is using. Also I usually grep -v "^Link:" .mbox files before sending,
guess what I forgot :-)
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