linux-kernel - Re: [PATCH] xen: core dom0 support

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Message-ID: <49B43F1D.2000400@zytor.com>
Date:	Sun, 08 Mar 2009 14:56:45 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>
Subject: Re: [PATCH] xen: core dom0 support

Ingo Molnar wrote:
> 
> Associativity effects do depend on the kernel image layout and 
> on the precise allocations of kernel data structure allocations 
> we do during bootup - and they dont really change after that.
> 

By the way, there is a really easy way (if a bit time consuming) to get
the actual variability here -- you have to reboot between runs, even for
the same kernel.  It makes the data collection take a long time, but at
least it can be scripted.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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