Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267522AbUJGSB0 (ORCPT ); Thu, 7 Oct 2004 14:01:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267540AbUJGSBX (ORCPT ); Thu, 7 Oct 2004 14:01:23 -0400 Received: from postino4.roma1.infn.it ([141.108.26.24]:41197 "EHLO postino4.roma1.infn.it") by vger.kernel.org with ESMTP id S267522AbUJGRwN (ORCPT ); Thu, 7 Oct 2004 13:52:13 -0400 Message-ID: <41658247.9060308@roma1.infn.it> Date: Thu, 07 Oct 2004 19:52:07 +0200 From: Davide Rossetti User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031210 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Brian McGrew CC: linux-kernel@vger.kernel.org Subject: Re: PCI Burst and Overall System Speed (XEON) References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-AntiVirus: checked by Vexira Milter 1.0.6; VAE 6.28.0.3; VDF 6.28.0.7 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 962 Lines: 28 Brian McGrew wrote: >I have a question about the PCI Bursting and overall processing speed on a dual Xeon box; but first I have to give a slight bit of background, (all of it relevant to the question) I'll try and keep it short. > > > what do you mean by "PCI Bursting" ?? are you using DMA (PCI card Mem Write Multiple) or MMIO read (CPU Mem Read Line) ? anyway on my system, 2 CPU Xeon 2.6GHz GC-LE + a custom PCI-X 100MHz card, I get - 440.755 MByte/s, only 1 process - 424.683 MByte/s, the process below running: sh -c 'while true ; do echo miao ; done' > /dev/null it's: Linux xeino 2.4.22-1.2199.nptlsmp #1 SMP Wed Aug 4 11:48:29 EDT 2004 i686 i686 i386 GNU/Linux what is your kernel version? regards - 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/