From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Ravinandan Arakali" Subject: I/OAT configuration ? Date: Thu, 17 Aug 2006 17:05:27 -0700 Message-ID: <003701c6c25a$034b0090$4010100a@pc.s2io.com> References: <20060816005343.8634.21805.stgit@gitlost.site> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from barracuda.s2io.com ([72.1.205.138]:38855 "EHLO barracuda.mail.s2io.com") by vger.kernel.org with ESMTP id S1750843AbWHRAGp (ORCPT ); Thu, 17 Aug 2006 20:06:45 -0400 To: "'Chris Leech'" , , In-Reply-To: <20060816005343.8634.21805.stgit@gitlost.site> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hi, I am trying to use I/OAT on one of the newer woodcrest boxes. But not sure if things are configured properly since there seems to be no change in performance with I/OAT enabled or disabled. Following are the steps followed. 1. MSI (CONFIG_PCI_MSI) is enabled in kernel(2.6.16.21). 2. In kernel DMA configuration, following are enabled. Support for DMA Engines Network: TCP receive copy offload Test DMA Client Intel I/OAT DMA support 3. I manually load the ioatdma driver (modprobe ioatdma) As per some documentation I read, when step #3 is performed successfully, directories dma0chanX is supposed to be created under /sys/class/dma but in my case, this directory stays empty. I don't see any messages in /var/log/messages. Any idea what is missing ? Thanks, Ravi