Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758203AbXLLAPG (ORCPT ); Tue, 11 Dec 2007 19:15:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752567AbXLLAO4 (ORCPT ); Tue, 11 Dec 2007 19:14:56 -0500 Received: from ug-out-1314.google.com ([66.249.92.168]:52222 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754945AbXLLAOz (ORCPT ); Tue, 11 Dec 2007 19:14:55 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:subject:date:user-agent:cc:references:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:message-id; b=GAZRUaTtr3WRaYdNpLoElfEzGZvh6urMRSRPtGX4SwiprGp7ixYvEaunzONFn2TeUAOOcWQg5iFJLgJh+XWEMmRGr8/n2vR96ta8HQarRRPgEEwHkaMcJE+o++5B2cmRTuHuP38Tt/DVPcfyWv2wQLxx5r9I04EFV1TKfd4kYRU= From: Maxim Levitsky To: Rene Herman Subject: Re: [RFT] Port 0x80 I/O speed Date: Wed, 12 Dec 2007 02:14:21 +0200 User-Agent: KMail/1.9.6 Cc: Linux Kernel , dpreed@reed.com, Alan Cox , pavel@ucw.cz, andi@firstfloor.org, rol@as2917.net, Krzysztof Halasa , david@davidnewall.com, hpa@zytor.com, john@stoffel.org, linux-os@analogic.com References: <475F1DC6.5090403@keyaccess.nl> <200712120140.34697.maximlevitsky@gmail.com> <475F20EA.5050803@keyaccess.nl> In-Reply-To: <475F20EA.5050803@keyaccess.nl> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200712120214.21346.maximlevitsky@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1802 Lines: 69 On Wednesday 12 December 2007 01:44:42 Rene Herman wrote: > On 12-12-07 00:40, Maxim Levitsky wrote: > > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1767, in 1147 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1774, in 1148 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1769, in 1150 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1769, in 1150 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1777, in 1150 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1766, in 1149 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1768, in 1148 > > maxim@MAIN:~/tmp$ sudo ./port800 > > cycles: out 1765, in 1147 > > > > > > Core 2 Duo system (ICH8/Intel DG965RY motherboard) > > 1.8 Ghz? > > Rene. > > 2.1 GHZ. but usually reduced by EIST to 1.5 GHz (It can have just two values above) I did the tests again: CPU frequency locked to 2128.000 Mhz: maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1650, in 1065 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1648, in 1066 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1649, in 1065 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1648, in 1065 maxim@MAIN:~/tmp$ CPU frequency locked to: 1596.000 Mhz maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1730, in 1138 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1730, in 1138 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1735, in 1140 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1734, in 1139 maxim@MAIN:~/tmp$ sudo ./port800 cycles: out 1734, in 1138 maxim@MAIN:~/tmp$ 2128.000 A bit strange, isn't it? Regards, Maxim Levitsky -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/