From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 30 Sep 2001 12:05:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 30 Sep 2001 12:05:24 -0400 Received: from [212.113.174.249] ([212.113.174.249]:14115 "EHLO smtp.netcabo.pt") by vger.kernel.org with ESMTP id ; Sun, 30 Sep 2001 12:05:21 -0400 Content-Type: text/plain; charset=US-ASCII From: Ricardo Ferreira To: linux-kernel@vger.kernel.org Subject: Poor 8139 network card performance when sharing IRQ Date: Sun, 30 Sep 2001 17:05:25 +0100 X-Mailer: KMail [version 1.3.5] MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-ID: X-OriginalArrivalTime: 30 Sep 2001 16:03:17.0716 (UTC) FILETIME=[6B195140:01C149C9] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I have a dual p3-1Ghz on a Abit VP6 board. Everything is working well except the network card. I have some nfs mounts and i'm using 4096 wsize and rsize for performance. However when eth0 and any other card are sharing an IRQ the result of a ping to the server with a packetsize of 4096 is this: $ ping -s 4096 fs PING loki.internal (192.168.0.40): 4096 data bytes 4104 bytes from 192.168.0.40: icmp_seq=0 ttl=255 time=1.6 ms 4104 bytes from 192.168.0.40: icmp_seq=1 ttl=255 time=283.5 ms 4104 bytes from 192.168.0.40: icmp_seq=2 ttl=255 time=755.3 ms 4104 bytes from 192.168.0.40: icmp_seq=3 ttl=255 time=2.1 ms 4104 bytes from 192.168.0.40: icmp_seq=4 ttl=255 time=1.6 ms 4104 bytes from 192.168.0.40: icmp_seq=5 ttl=255 time=2.1 ms 4104 bytes from 192.168.0.40: icmp_seq=6 ttl=255 time=1.8 ms 4104 bytes from 192.168.0.40: icmp_seq=7 ttl=255 time=284.1 ms 4104 bytes from 192.168.0.40: icmp_seq=8 ttl=255 time=2.0 ms 4104 bytes from 192.168.0.40: icmp_seq=9 ttl=255 time=284.4 ms 4104 bytes from 192.168.0.40: icmp_seq=10 ttl=255 time=2.0 ms 4104 bytes from 192.168.0.40: icmp_seq=11 ttl=255 time=2.2 ms 4104 bytes from 192.168.0.40: icmp_seq=12 ttl=255 time=754.9 ms 4104 bytes from 192.168.0.40: icmp_seq=13 ttl=255 time=283.7 ms 4104 bytes from 192.168.0.40: icmp_seq=14 ttl=255 time=391.9 ms --- loki.internal ping statistics --- 15 packets transmitted, 15 packets received, 0% packet loss round-trip min/avg/max = 1.6/203.5/755.3 ms ... but if i remove the other card (in this case a Miro Video TV Card) the ping times all drop to about 2ms. Is this drop in performance normal or is it a bug ? As an aside, anything lower than 1024 packetsize doesn't slowdown. Thanks -- [------------------------------------------------][-------------------------] |"One World, One Web, One Program" - Microsoft Ad|| stormlabs@gmx.net | |"Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler||http://storm.superzip.net| [------------------------------------------------][-------------------------] --> thor up 2 days | sentinel up 59 days | loki up 59 days <--