linux-kernel - Re: [patch 05/24] perfmon: X86 generic code (x86)

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Message-ID: <20081127124640.GM6703@one.firstfloor.org>
Date:	Thu, 27 Nov 2008 13:46:40 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	eranian@...il.com
Cc:	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	mingo@...e.hu, x86@...nel.org, sfr@...b.auug.org.au
Subject: Re: [patch 05/24] perfmon: X86 generic code (x86)

> That's true for Intel.
> On AMD64, I think you can get at most one sample out of a irq-off
> region using IBS.

Assuming that the irqs off regions are not too long (and that's
usually the case) that should be enough, shouldn't it?

Sure there are still CPUs with neither IBS or PEBS.

-Andi

-- 
ak@...ux.intel.com
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