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Date: Tue, 11 Dec 2007 11:32:09 -0500
From: "John Stoffel" <john@stoffel.org>
To: Rene Herman <rene.herman@keyaccess.nl>
Cc: Paul Rolland <rol@as2917.net>, David Newall <david@davidnewall.com>,
       "H. Peter Anvin" <hpa@zytor.com>, Krzysztof Halasa <khc@pm.waw.pl>,
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       Alan Cox <alan@lxorguk.ukuu.org.uk>, "David P. Reed" <dpreed@reed.com>,
       linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
       Ingo Molnar <mingo@redhat.com>, rol@witbe.net
Subject: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64
 with MCP51 laptops
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Here's my results on a PIII Xeon, 550mhz, 440GX chipset, and an ISA
slot, which until recently was actually used with an 8 port serial
card:

jfsnew:~/src> sudo ./port80
out: 729
in : 348
jfsnew:~/src> sudo ./port80
out: 729
in : 354
jfsnew:~/src> sudo ./port80
out: 729
in : 350
jfsnew:~/src> sudo ./port80
out: 728
in : 346
jfsnew:~/src> sudo ./port80
out: 730
in : 340
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