[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <4B511B12.6010208@zytor.com>
Date: Fri, 15 Jan 2010 17:49:06 -0800
From: "H. Peter Anvin" <hpa@...or.com>
To: Yuhong Bao <yuhongbao_386@...mail.com>
CC: Linus Torvalds <torvalds@...ux-foundation.org>, mingo@...hat.com,
linux-kernel@...r.kernel.org
Subject: Re: Ubuntu 32-bit, 32-bit PAE, 64-bit Kernel Benchmarks
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists