From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758796AbXLLQ3f (ORCPT ); Wed, 12 Dec 2007 11:29:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758145AbXLLQ3Z (ORCPT ); Wed, 12 Dec 2007 11:29:25 -0500 Received: from ag-out-0708.google.com ([72.14.246.246]:61165 "EHLO ag-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757878AbXLLQ3X (ORCPT ); Wed, 12 Dec 2007 11:29:23 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding:from; b=fr9LlX793iV2seqsRyi1qUhr2HcFTm1BSNPeivqxswvuPSb1R7MmSs1S845T3TKIHIJW+vpdrJqpSjyybmcXIIVTTKKViQ6nMAh6pfdex1bxw1tR8K3hWFhth+MQhrf9pAQm50qCKpNnNt0zWqshrbwxuOqVbRwp/vtRa1s4K2U= Message-ID: <47600C0C.9010002@keyaccess.nl> Date: Wed, 12 Dec 2007 17:27:56 +0100 User-Agent: Thunderbird 2.0.0.9 (X11/20071031) MIME-Version: 1.0 To: Romano Giannetti CC: Linux Kernel Subject: Re: [RFT] Port 0x80 I/O speed References: <475F1DC6.5090403@keyaccess.nl> <1197453439.27741.6.camel@rukbat> In-Reply-To: <1197453439.27741.6.camel@rukbat> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit From: Rene Herman Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12-12-07 10:57, Romano Giannetti wrote: > On a laptop with a CoreDuo T2080/1.73GHz, but running on battery at > 800 MHz (on-demand): > cycles: out 3575, in 2844 Okay, I'm going to ignore this one. This would be 4 microsecs but there are sleep states involved, and if a piece of hardware would work only when the system went to sleep I'd call it broken... > With a cpu-hog running, cpufreq reporting 1.73GHz: > cycles: out 3446, in 2652 So this one will do I guess. The test program disables interrupts and as such, the cpu-hog shouldn't have interfered with the measurement. Thanks! Rene.