Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261426AbTIOOcD (ORCPT ); Mon, 15 Sep 2003 10:32:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261432AbTIOOcC (ORCPT ); Mon, 15 Sep 2003 10:32:02 -0400 Received: from uni03mr.unity.ncsu.edu ([152.1.1.166]:51685 "EHLO uni03mr.unity.ncsu.edu") by vger.kernel.org with ESMTP id S261426AbTIOOb7 (ORCPT ); Mon, 15 Sep 2003 10:31:59 -0400 Message-ID: <00ff01c37b96$9ddb4650$8c330e98@nanegrc> From: "Lisong Xu" To: , Subject: Intel PRO/1000 NIC Date: Mon, 15 Sep 2003 10:35:31 -0400 Organization: NC State University MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2256 Lines: 51 Hello, I am sending UDP data from one PC to another PC directly through a cross cable. The NIC of sender is Intel? PRO/1000 MT Server Adapter, and the NIC of receiver is on-board Intel PRO/1000 (Dell PowerEdge 1600SC). After tuning the kernel and driver parameters, the sender can send data at 1Gbps. But the receiver can only receive data at 620Mbps. (see the following ifconfig messages, 30 seconds test) *********** Sender ******************* eth1 Link encap:Ethernet HWaddr 00:07:E9:17:84:36 inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1 RX packets:111 errors:0 dropped:0 overruns:0 frame:0 TX packets:418072 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:30000 RX bytes:26193 (25.5 Kb) TX bytes:3759596626 (3585.4 Mb) Interrupt:24 Base address:0xccc0 Memory:fcd00000-fcd20000 **************Receiver*********************** eth0 Link encap:Ethernet HWaddr 00:C0:9F:1E:3A:46 inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1 RX packets:261355 errors:156688 dropped:156688 overruns:156688 frame:0 <---- Look here!!!!! TX packets:97 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:30000 RX bytes:2350019728 (2241.1 Mb) TX bytes:22821 (22.2 Kb) Interrupt:11 Base address:0xecc0 Memory:fe100000-fe120000 *************************************************** My questions is why so many packets are "errors, dropped, overruns". I have adjusted the "TxDescriptors, RxDescriptors, RxIntDelay, RxAbsIntDelay, TxIntDelay, TxAbsIntDelay" for different values, but always got similar result. Maybe here is not the right email list to send, but I am really frustrated with this problems, and hope to get some suggestions from the experts here.Any suggestion is really appreciated! Lisong - 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/