From owner-freebsd-hackers Thu Apr 10 18:55:54 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id SAA19085 for hackers-outgoing; Thu, 10 Apr 1997 18:55:54 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id SAA19080 for ; Thu, 10 Apr 1997 18:55:50 -0700 (PDT) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id LAA08171; Fri, 11 Apr 1997 11:25:42 +0930 (CST) From: Michael Smith Message-Id: <199704110155.LAA08171@genesis.atrad.adelaide.edu.au> Subject: Re: dropped packet on de0 In-Reply-To: <9703108606.AA860696480@ccmail.res.ray.com> from "Gregory_D_Moncreaff@ccmail.res.ray.com" at "Apr 10, 97 09:31:56 am" To: Gregory_D_Moncreaff@ccmail.res.ray.com Date: Fri, 11 Apr 1997 11:25:42 +0930 (CST) Cc: freebsd-hackers@freebsd.org X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Gregory_D_Moncreaff@ccmail.res.ray.com stands accused of saying: > I was trying to see if I could make de0 drop packets > > I ran 3 "ping -f"s between different pairs of > nodes on a shared 10Mbit coax ethernet > > xperfmon++ reported ~1500 packets per second, ~700 collisions per > second. > > netstat -d -I didn't report a single drop > > when I used kgdb to watch the send queue, I did not ever see any > accumulation of data > > all this under 2.1.0 (p5-133, smc etherpower combo) > > My question, is it possible to load down the de0 send queue at all, > and if so, under what conditions? ping -f only sends at 100 packets/second; try 'ping -l 100000' to get ping to really push, or use one of the TCP throughput testing programs in the ports collection. -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[