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Date: Sun, 30 Mar 2003 12:32:06 -0800
To: Pavel Machek <pavel@ucw.cz>, "Filipau, Ihar" <ifilipau@sussdd.de>
From: Jonathan Lundell <linux@lundell-bros.com>
Subject: Re: inw/outw performance
Cc: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
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At 7:23pm +0200 3/30/03, Pavel Machek wrote:
>  >   And actually what I have found that on my development P3/1GHz system
>>    every inw() takes more that 3us. I wasn't measuring outw() yet - but
>>    I do not expect its timing to be better.
>
>inw/outw *is* slow. Memory map your
>registers to speed it up.

Shouldn't be *that* slow, though, especially over PCI, unless the 
device in question is taking that long to respond--in which case 
memory mapping won't help.
-- 
/Jonathan Lundell.
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