From owner-freebsd-hackers Tue Jun 1 9:50:15 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from etinc.com (et-gw.etinc.com [207.252.1.2]) by hub.freebsd.org (Postfix) with ESMTP id 19FD815060 for ; Tue, 1 Jun 1999 09:49:56 -0700 (PDT) (envelope-from dennis@etinc.com) Received: from dbsys (dbsys.etinc.com [207.252.1.18]) by etinc.com (8.9.3/8.9.3) with SMTP id MAA24039; Tue, 1 Jun 1999 12:50:39 -0400 (EDT) Message-Id: <199906011650.MAA24039@etinc.com> X-Sender: dennis@etinc.com X-Mailer: QUALCOMM Windows Eudora Pro Version 4.0 Date: Tue, 01 Jun 1999 11:46:22 -0400 To: Jason Thorpe From: Dennis Subject: Re: xl driver for 3Com Cc: hackers@freebsd.org In-Reply-To: <199906011500.IAA27210@lestat.nas.nasa.gov> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 08:00 AM 6/1/99 -0700, you wrote: >On Tue, 1 Jun 1999 10:09:59 +0200 > Alexander Maret wrote: > > > At first I tried my FreeBSD machine and I got about 800-900 collisions. > > Second I booted on the same machine linux and I only got 4 (!) collisions. > >It's also possible that Linux isn't counting the collisions properly. > > > I have no problem with thousands or millions of collissions, as long as > > they don't crash my computer. I just want a running system. > >Collisions don't cause your system to crash. If this is happening, >something else is at fault (though that something else may be an >unrelated problem in the Ethernet driver). If your nic driver chains packets (such that there is no time in between) you will see good throughput from the box but your overall network performance will suffer. A PCI card with continueous traffic can completely hog your lan (particularly at 10Mb/s)...which can cause a lot more collisions on your network as other devices will not have access until the hog is finished sending. For "Fairness" gaps in between frames are better as you approach capacity of your wire. Dennis To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message