From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 25 Sep 2001 16:36:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 25 Sep 2001 16:35:54 -0400 Received: from dfw-smtpout4.email.verio.net ([129.250.36.44]:43194 "EHLO dfw-smtpout4.email.verio.net") by vger.kernel.org with ESMTP id ; Tue, 25 Sep 2001 16:35:44 -0400 Message-ID: <3BB0EAB7.51F85DBE@bigfoot.com> Date: Tue, 25 Sep 2001 13:36:07 -0700 From: Tim Moore Organization: Yoyodyne Propulsion Systems, Inc. X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.2.20p10i i686) X-Accept-Language: en MIME-Version: 1.0 To: Chris Newton CC: linux-kernel@vger.kernel.org Subject: Re: excessive interrupts on network cards In-Reply-To: <3BB0E01D@webmail1> 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 'think' the number of interrupts being generated for the network traffic I > monitor, is excessive. Having talked quikly with Donald Becker, he indicated > that I should be seeing a little less than the number of RX/TX packets/s on a > wire, in terms of interrupts/s. That, however, is not what I am seeing. I am > seeing 3 times as many interrupts/s as I am seeing packets/s. Also check context switches and TX/RX errors. Reference point as follows. rgds, tim. ***** 10MB file copy, scp v1.68, switched private LAN: Clocktime: 9 sec Receiver IRQ/sec: 599 Receiver context switch/sec: 1271 Receiver bytes/IRQ: 1935 NIC driver (both): tulip.c:v0.91g-ppc 7/16/99 becker@cesdis.gsfc.nasa.gov Sender: 2.2.20pre6, i586@166MHz eth1: Lite-On 82c168 PNIC rev 32 at 0x6200, 00:A0:CC:58:F8:CE, IRQ 10. eth1: MII transceiver #1 config 3000 status 782d advertising 01e1. eth1: Setting full-duplex based on MII#1 link partner capability of 41e1. eth1 Link encap:Ethernet HWaddr 00:A0:CC:58:F8:CE inet addr:192.168.1.11 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2230475 errors:0 dropped:0 overruns:0 frame:0 TX packets:3785425 errors:3 dropped:0 overruns:3 carrier:0 collisions:0 txqueuelen:100 Interrupt:10 Base address:0x6200 Receiver: 2.2.20pre10, Athlon@850MHz eth0: Lite-On 82c168 PNIC rev 32 at 0xec00, 00:A0:CC:57:89:93, IRQ 11. eth0: MII transceiver #1 config 3000 status 7829 advertising 01e1. eth0: Setting full-duplex based on MII#1 link partner capability of 41e1. eth0 Link encap:Ethernet HWaddr 00:A0:CC:57:89:93 inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2741953 errors:0 dropped:0 overruns:0 frame:0 TX packets:1606566 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 Interrupt:11 Base address:0xec00 -- | 650.390.9613 - 650.224.7437c