linux-kernel - Re: [PATCH RFC] [X86] performance improvement for memcpy

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Message-ID: <87my2z7g1b.fsf@basil.nowhere.org>
Date:	Fri, 06 Nov 2009 17:51:28 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	ling.ma@...el.com
Cc:	mingo@...e.hu, hpa@...or.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] [X86] performance improvement for memcpy_64.S by fast string.

ling.ma@...el.com writes:

> Intel Nehalem improves the performance of REP strings significantly
> over previous microarchitectures in several ways:

The problem is that it's not necessarily a win on older CPUs to
do it this way.

-Andi

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