From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 27 Sep 2001 21:18:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 27 Sep 2001 21:18:34 -0400 Received: from cx97923-a.phnx3.az.home.com ([24.9.112.194]:44419 "EHLO grok.yi.org") by vger.kernel.org with ESMTP id ; Thu, 27 Sep 2001 21:18:24 -0400 Message-ID: <3BB3CFFA.F9021469@candelatech.com> Date: Thu, 27 Sep 2001 18:18:50 -0700 From: Ben Greear Organization: Candela Technologies X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.3-12 i686) X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel Subject: How to debug PCI issues? Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm working with a TYAN Tomcat board (i815, Ghz CPU). It's in a 1U machine with a butterfly riser so that I get two riser connections to one PCI slot. When I put Intel EEPRO nics in each slot, I can pass 30Mbps of traffic on each NIC without dropping a single packet (In two days of running). If I run 20Mbps on one of the DLINK ports, I'm fine, but if I run 10Mbps on two of the DLINK ports, I start seeing dropped packets on every interface, and port errors like RX-FIFO. So, I'm thinking that the DLINK NIC must be screwing up the PCI bus somehow when more than one of it's interfaces is passing any significant traffic. I have been able to run 10Mbps on all 8 ports of two DLINKs on an Intel EEA2 (i815) board, so I suspect the MB. Does anyone have any ideas how to go about trouble-shooting this farther? Thanks, Ben -- Ben Greear President of Candela Technologies Inc http://www.candelatech.com ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear