Date: Sun, 15 Nov 1998 00:24:46 +0000 From: Brian Somers <brian@Awfulhak.org> To: Archie Cobbs <archie@whistle.com> Cc: cshenton@uucom.com (Chris Shenton), dave@comsite.net, questions@FreeBSD.ORG Subject: Re: mpd + EQL, Livingston PM2 MLLB, alternatives? mpd load high? Message-ID: <199811150024.AAA26739@woof.lan.awfulhak.org> In-Reply-To: Your message of "Mon, 09 Nov 1998 08:56:46 PST." <199811091656.IAA01819@bubba.whistle.com>
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[.....] > > Archie: I notice mpd with one line is consuming 10-15% of my 486-66 > > CPU when doing stuff like CVSUP or FTP downloads. Is this normal? Due > > to the link compression? Will it increase as I add lines? The 486 is > > pretty much dedicated to being a dialup/router so this isn't a big > > concern but it does indicate scalability problems if I try to > > increase lines (or use even older hardware :-) > > That's probably more or less normal.. the negative side of > doing it all in user-land. A recent report from jak@cetlink.net (John Kelly) said about user-ppp: : >CPU loading under FTP is good with only one link in the bundle. The : >server ppp consumes about 2% of the CPU and the client about 4%. But : >when I add a second link to the bundle, the client ppp skyrockets to : >over 40% of the CPU. Ouch! : : I tried reversing the roles of client and server, and the problem : disappeared?! Realizing that, I started swapping things and found : that one cable was causing the problem. It was not obvious, because : throughput was fine with that cable. But something about it is flakey : and causing the CPU load to shoot way up. : : Now that I've replaced that cable, CPU loading is much better. With : two lines running full blast at 115,200, the client tops out around 9% : and the server about 7%. It goes much higher with compression, but I : can let the modems do the compression and save my CPU to run about 16 : lines. Maybe there's a similar problem with cabling here ? [.....] > -Archie > > ___________________________________________________________________________ > Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com -- Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org> <http://www.Awfulhak.org>; Don't _EVER_ lose your sense of humour.... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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