linux-kernel - Re: [RFT] Port 0x80 I/O speed

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Message-ID: <47614D99.7090505@gmail.com>
Date:	Thu, 13 Dec 2007 16:19:53 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Rene Herman <rene.herman@...il.com>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>, dpreed@...d.com,
	Alan Cox <alan@...rguk.ukuu.org.uk>, pavel@....cz,
	andi@...stfloor.org, rol@...917.net,
	Krzysztof Halasa <khc@...waw.pl>, david@...idnewall.com,
	john@...ffel.org, linux-os@...logic.com
Subject: Re: [RFT] Port 0x80 I/O speed

Rene Herman napsal(a):
> On 12-12-07 19:44, H. Peter Anvin wrote:
> 
>>> model name      : Intel(R) Xeon(R) CPU           E5335  @ 2.00GHz
>>> cycles: out 3217, in 1898
>>
>> 1.6 µs, on the high end....
>>
>>> model name      : Dual Core AMD Opteron(tm) Processor 275
>>> cycles: out 5508, in 5524
>>
>> Definitely an outlier; 2.5 µs here.

Now, it's around
cycles: out 4763, in 5515

It's
cpu MHz         : 2205.209
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