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Message-ID: <475EBD69.9090709@keyaccess.nl>
Date: Tue, 11 Dec 2007 17:40:09 +0100
From: Rene Herman <rene.herman@keyaccess.nl>
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To: John Stoffel <john@stoffel.org>
CC: Paul Rolland <rol@as2917.net>, David Newall <david@davidnewall.com>,
       "H. Peter Anvin" <hpa@zytor.com>, Krzysztof Halasa <khc@pm.waw.pl>,
       Pavel Machek <pavel@ucw.cz>, Andi Kleen <andi@firstfloor.org>,
       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
References: <475879CD.9080006@reed.com>	<p733auekcly.fsf@bingen.suse.de>	<20071207160439.71b7f46a@the-village.bc.nu>	<20071209125458.GB4381@ucw.cz>	<20071209165908.GA15910@one.firstfloor.org>	<20071209212513.GC24284@elf.ucw.cz>	<475CBDD7.5050602@keyaccess.nl>	<m3bq8y23de.fsf@maximus.localdomain>	<475DE37F.20706@davidnewall.com>	<475DE6F4.80702@zytor.com>	<475DEB23.1000304@davidnewall.com>	<20071211084059.3d03e11d@tux.DEF.witbe.net>	<475E5D4B.8020101@keyaccess.nl>	<475E7DC2.4060509@davidnewall.com>	<475E8D91.20201@keyaccess.nl>	<20071211143224.15900995@tux.DEF.witbe.net>	<475E9B9B.2050709@keyaccess.nl>	<475EACB8.7080608@keyaccess.nl> <18270.48009.256443.854729@stoffel.org>
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On 11-12-07 17:32, John Stoffel wrote:

> 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

Thank you. That's a little odd. The "in" time should be close to the "out" 
time really.

Well, err, <shrug> I guess.

For now noone's contemplating replacing the out with an in anyways :-)

Rene.

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