From owner-freebsd-hackers Thu Feb 8 21:53:07 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id VAA01208 for hackers-outgoing; Thu, 8 Feb 1996 21:53:07 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id VAA01202 for ; Thu, 8 Feb 1996 21:53:02 -0800 (PST) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id QAA20785; Fri, 9 Feb 1996 16:19:15 +1030 From: Michael Smith Message-Id: <199602090549.QAA20785@genesis.atrad.adelaide.edu.au> Subject: Re: tcpdump / kernel dropping packets To: koshy@india.hp.com (A JOSEPH KOSHY) Date: Fri, 9 Feb 1996 16:19:14 +1030 (CST) Cc: hackers@FreeBSD.ORG In-Reply-To: <199602090427.AA168780028@fakir.india.hp.com> from "A JOSEPH KOSHY" at Feb 9, 96 09:57:06 am MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG Precedence: bulk A JOSEPH KOSHY stands accused of saying: > > I was testing my network driver and found that `tcpdump' was experiencing > a very high packet drop rate. > > If I run "tcpdump" without the "-n" option, I find (a) the output on > screen is `bursty' with long periods of silence (b) at the end of the run > tcpdump reports typically 90% of the packets "dropped by kernel". Your nameserver is not good. > I'd like to know if this behaviour is normal or whether there is something > wrong with my network setup (read: my driver :)). I can watch pretty busy networks (eg. campus backbone with >500 nodes) with an NE2000-klone without any great problems. (Obviously with '-n') Is the machine doing anything else? 8M and IDE make a very poor combination if the system has to go near the disk. > Koshy -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] "wherever you go, there you are" - Buckaroo Banzai [[