From owner-freebsd-hackers Tue Nov 4 12:39:53 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id MAA05649 for hackers-outgoing; Tue, 4 Nov 1997 12:39:53 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from crh.cl.msu.edu (crh.cl.msu.edu [35.8.1.24]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id MAA05644 for ; Tue, 4 Nov 1997 12:39:50 -0800 (PST) (envelope-from henrich@crh.cl.msu.edu) Received: (from henrich@localhost) by crh.cl.msu.edu (8.8.7/8.8.7) id PAA00426; Tue, 4 Nov 1997 15:39:29 -0500 (EST) (envelope-from henrich) Date: Tue, 4 Nov 1997 15:39:29 -0500 (EST) From: Charles Henrich Message-Id: <199711042039.PAA00426@crh.cl.msu.edu> To: Don.Lewis@tsc.tdk.com, freebsd-hackers@freebsd.org Subject: Re: de0 errors Newsgroups: lists.freebsd.hackers References: <63lrjc$491$1@msunews.cl.msu.edu> X-Newsreader: NN version 6.5.0 CURRENT #1 Sender: owner-freebsd-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >Bingo! I believe that a 21140 based NIC is bad juju in a system with a >440FX based system because the 21140 can only do plain PCI memory reads >(MR) and you really need to use PCI read multiple commands (MRM) to get >decent throughput with this chipset, and probably any other Pentium Pro >or Pentium II chipset. A 21140A based NIC should work much better since >it can use the MRM command. Humm... >} Humm, tcpblast shows 4.0MB/sec. Granted this isnt an empty net either, >} fairly busy I would imagine. >That's probably a reasonable number for a 10Mb network, but not a >100Mb network. BTW, I bet this NIC is also hurting your disk I/O >throughput since it is hogging the PCI bus because it's using an >inefficient transfer method. Um, a 10Mb network cannot sustain 4.0MB/sec :) -Crh -- Charles Henrich Michigan State University henrich@msu.edu http://pilot.msu.edu/~henrich