From owner-freebsd-hackers Tue Dec 16 23:18:39 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id XAA17743 for hackers-outgoing; Tue, 16 Dec 1997 23:18:39 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from verdi.nethelp.no (verdi.nethelp.no [195.1.171.130]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id XAA17706 for ; Tue, 16 Dec 1997 23:18:13 -0800 (PST) (envelope-from sthaug@nethelp.no) From: sthaug@nethelp.no Received: (qmail 19824 invoked by uid 1001); 17 Dec 1997 07:17:47 +0000 (GMT) To: grog@lemis.com Cc: hackers@FreeBSD.ORG Subject: Re: 3com 3c509 card In-Reply-To: Your message of "Wed, 17 Dec 1997 11:38:01 +1030" References: <19971217113801.53802@lemis.com> X-Mailer: Mew version 1.05+ on Emacs 19.28.2 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Date: Wed, 17 Dec 1997 08:17:47 +0100 Message-ID: <19822.882343067@verdi.nethelp.no> Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > I've been doing some experiments with ftps on my local network, but > the results have been puzzling, and until I know what's going on, I'm > not going to go into too much detail. But I've noticed that I'm > getting very high interrupt times on a P5/133 (up to over 50%) when > receiving large files (40 MB). I've also noticed that the transfer > starts at about 1 MB/s, but after about 10 MB there are problems, and > the final transfer rate is often less than 500 kB/s. This is not what > I measured on the same systems about a year ago. I may follow up on > this if I find time. If you're trying to measure measure network performance, why don't you use a tool which is suitable for the job? FTP is definitely not a good tool for this job. I'd suggest ttcp or NetPerf. Btw, I've measured more than a megabyte/s myself with NE2000 clones (Kingston) on a 486, using ttcp. Steinar Haug, Nethelp consulting, sthaug@nethelp.no