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

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Date:	Wed, 12 Dec 2007 16:53:47 +0100
From:	Rene Herman <rene.herman@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFT] Port 0x80 I/O speed

On 12-12-07 12:25, Jiri Slaby wrote:

Thanks for reporting! You have two results that are somewhat off:

> Intel(R) Core(TM)2 Duo CPU E6850 @ 3.00GHz
> cycles: out 6500, in 3135

6500 / 3000 = 2.17. Fairly high...

> Intel(R) Xeon(R) CPU E5335 @ 2.00GHz
> cycles: out 3217, in 1898

3217 / 2000 = 1.61. Okay.

> Dual Core AMD Opteron(tm) Processor 275
> cycles: out 5508, in 5524

2200 MHz right?

5508 / 2200 = 2.50. Very high.

Nothing was dozing off in some ACPI sleep state or something?

Rene.
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