Date: Wed, 17 Dec 2003 09:34:52 -0500 From: Bill Vermillion <bv@wjv.com> To: freebsd-net@freebsd.org Subject: Re: suffering from poor network performance... Message-ID: <20031217143452.GD68467@wjv.com> In-Reply-To: <5099DCD8-301B-11D8-A624-000A95775140@battleface.com> References: <5099DCD8-301B-11D8-A624-000A95775140@battleface.com>
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On Tue, Dec 16, 2003 at 17:58 , while impersonating an expert on the internet, Alex sent this to stdout: > First, I know very little about networking, especially > performance turning. I would really like to learn more but don't > know where/how to start effectively. > I have a small home network with a PowerBook G4 and FBSD > 4.9-STABLE connected through a Netgear DS108 hub (10/100). The > FBSD box is a dual Xeon 500MHz with Intel Etherexpress 100/Pro > (MS440GX motherboard). If for some reason it makes a difference, > there is an RT311 router connected to the hub as well. This is > the router through which these machines see the internet. There > are other machines connected to the network. However, they are > currently turned off. > In my limited knowledge I'm using ping from each host to the > other. From the FBSD system to the G4 system, I'm getting nearly > 60% packet loss and about 20% in the other direction. I'm ready > to use tcpdump but I'm not sure how I would. How can/should I go > about improving network performance? I've not tried the ping but I'm seeing exceptionally poor performance on G4s to FreeBSD. The G4's can ftp to each other at about 8-9MB/sec, as can the FreeBSDs. They are on a Cisco 2948 switch. But ftp from BSD to G4 is in the order of 20-40KB/sec while G4 to FreeBSD is about 1/2 that. This was first noted by a client who has a G4 in our rack and have a very large flash file on their front page. I've also heard annecdotal reports of slow G4 to MS machines too. But not everyone has this and I can't seem to find an answer. And I have NO problems with pings. Just data transfer. One G4 runs high load as shown under very little CPU available under top, while the other is far less stressed. Bill -- Bill Vermillion - bv @ wjv . com
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