linux-kernel - Re: larger default page sizes...

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Message-Id: <1206469665.27393.19.camel@nimitz.home.sr71.net>
Date:	Tue, 25 Mar 2008 11:27:45 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	David Miller <davem@...emloft.net>, clameter@....com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-ia64@...r.kernel.org, torvalds@...ux-foundation.org
Subject: Re: larger default page sizes...

On Tue, 2008-03-25 at 14:29 +1100, Paul Mackerras wrote:
> 4kB pages:      444.051s user + 34.406s system time
> 64kB pages:     419.963s user + 16.869s system time
> 
> That's nearly 10% faster with 64kB pages -- on a kernel compile.

Can you do the same thing with the 4k MMU pages and 64k PAGE_SIZE?
Wouldn't that easily break out whether the advantage is from the TLB or
from less kernel overhead?

-- Dave

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