Messages in this thread | | | Date | Tue, 13 Jan 2009 09:24:09 +0000 | From | Arjan van de Ven <> | Subject | Re: [PATCH] x86: change the default cache size to 64 bytes |
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On Mon, 12 Jan 2009 23:44:28 +0100 Ingo Molnar <mingo@elte.hu> wrote:
> >From 632c5045d6827a3d044b6eb216d0e5597b25d468 Mon Sep 17 00:00:00 > >2001 > From: Ingo Molnar <mingo@elte.hu> > Date: Mon, 12 Jan 2009 23:37:16 +0100 > Subject: [PATCH] x86: change the default cache size to 64 bytes > > Right now the generic cacheline size is 128 bytes - that is wasteful > when structures are aligned, as all modern x86 CPUs have an > (effective) cacheline sizes of 64 bytes. > > It was set to 128 bytes due to some cacheline aliasing problems on > older P4 systems, but those are many years old and we dont optimize > for them anymore. (They'll still get the 128 bytes cacheline size if > the kernel is specifically built for Pentium 4) > > Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
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