From: Andi Kleen <andi@firstfloor.org>
To: ling.ma@intel.com
Cc: mingo@elte.hu, hpa@zytor.com, tglx@linutronix.de,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC] [X86] performance improvement for memcpy_64.S by fast string.
Date: Fri, 06 Nov 2009 17:51:28 +0100 [thread overview]
Message-ID: <87my2z7g1b.fsf@basil.nowhere.org> (raw)
In-Reply-To: <1257500482-16182-1-git-send-email-ling.ma@intel.com> (ling ma's message of "Fri, 6 Nov 2009 17:41:22 +0800")
ling.ma@intel.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@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-11-06 16:51 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-06 9:41 [PATCH RFC] [X86] performance improvement for memcpy_64.S by fast string ling.ma
2009-11-06 16:51 ` Andi Kleen [this message]
2009-11-08 10:18 ` Ingo Molnar
2009-11-06 17:07 ` H. Peter Anvin
2009-11-06 19:26 ` H. Peter Anvin
2009-11-09 7:24 ` Ma, Ling
2009-11-09 7:36 ` H. Peter Anvin
2009-11-09 8:08 ` Ingo Molnar
2009-11-11 7:05 ` Ma, Ling
2009-11-11 7:18 ` Ingo Molnar
2009-11-11 7:57 ` Ma, Ling
2009-11-11 23:21 ` H. Peter Anvin
2009-11-12 2:12 ` Ma, Ling
2009-11-11 20:34 ` Cyrill Gorcunov
2009-11-11 22:39 ` H. Peter Anvin
2009-11-12 4:28 ` Cyrill Gorcunov
2009-11-12 4:49 ` Ma, Ling
2009-11-12 5:26 ` H. Peter Anvin
2009-11-12 7:42 ` Ma, Ling
2009-11-12 9:54 ` Cyrill Gorcunov
2009-11-12 12:16 ` Pavel Machek
2009-11-13 7:33 ` Ingo Molnar
2009-11-13 8:04 ` H. Peter Anvin
2009-11-13 8:10 ` Ingo Molnar
2009-11-09 9:26 ` Andi Kleen
2009-11-09 16:41 ` H. Peter Anvin
2009-11-09 18:54 ` Andi Kleen
2009-11-09 22:36 ` H. Peter Anvin
2009-11-12 12:16 ` Pavel Machek
2009-11-13 5:33 ` Ma, Ling
2009-11-13 6:04 ` H. Peter Anvin
2009-11-13 7:23 ` Ma, Ling
2009-11-13 7:30 ` H. Peter Anvin
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