From: Jan Beulich <JBeulich@suse.com>
Date: Fri, 2 Nov 2012 14:20:24 +0000 (+0000)
Subject: x86/xor: Add alternative SSE implementation only prefetching once per 64-byte line
X-Git-Tag: v3.9-rc1~168^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f317820cb6ee3fb173319bf76e0e62437be78ad2;p=pandora-kernel.git

x86/xor: Add alternative SSE implementation only prefetching once per 64-byte line

On CPUs with 64-byte last level cache lines, this yields roughly
10% better performance, independent of CPU vendor or specific
model (as far as I was able to test).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/5093E4B802000078000A615E@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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