From: "H. Peter Anvin" <hpa@zytor.com>
To: Yuhong Bao <yuhongbao_386@hotmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
mingo@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: Ubuntu 32-bit, 32-bit PAE, 64-bit Kernel Benchmarks
Date: Fri, 15 Jan 2010 17:49:06 -0800 [thread overview]
Message-ID: <4B511B12.6010208@zytor.com> (raw)
In-Reply-To: <SNT125-W41CEF6892DBE0B1FD99B4AC3780@phx.gbl>
On 12/30/2009 05:29 PM, Yuhong Bao wrote:
>
> Given that Linus was once talking about the performance penalties of PAE and HIGHMEM64G, perhaps you'd find these benchmarks done by Phoronix of interest:
> http://www.phoronix.com/scan.php?page=article&item=ubuntu_32_pae
>
The big difference isn't between HIGHMEM4G (no PAE) and HIGHMEM64G
(PAE), it's between HIGHMEM and !HIGHMEM. That cutoff is ~892 MB for a
stock 32-bit kernel.
-hpa
next prev parent reply other threads:[~2010-01-16 1:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-31 1:29 Ubuntu 32-bit, 32-bit PAE, 64-bit Kernel Benchmarks Yuhong Bao
2009-12-31 2:49 ` Bill Davidsen
2009-12-31 8:21 ` Boaz Harrosh
2009-12-31 16:32 ` Bill Davidsen
2009-12-31 17:49 ` Pedro Ribeiro
2009-12-31 18:39 ` Linus Torvalds
2010-01-03 3:39 ` Yuhong Bao
2010-01-16 0:48 ` Yuhong Bao
2010-01-16 1:49 ` H. Peter Anvin [this message]
2010-01-16 2:06 ` Yuhong Bao
2010-01-16 3:47 ` Linus Torvalds
2010-01-16 4:32 ` yuhongbao_386
2010-01-16 4:53 ` H. Peter Anvin
2010-01-16 6:17 ` yuhongbao_386
2010-01-16 17:59 ` Bill Davidsen
2010-01-17 9:26 ` matthieu castet
2010-01-31 17:03 ` Robert Hancock
2010-01-16 12:33 ` Sitsofe Wheeler
2010-01-16 12:57 ` Robert P. J. Day
2010-01-16 17:11 ` H. Peter Anvin
2010-03-01 1:31 ` Yuhong Bao
2010-03-01 1:38 ` Yuhong Bao
2010-01-16 8:46 ` Geert Uytterhoeven
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