Date: Wed, 15 May 2002 03:58:19 +0100 From: Brian Somers <brian@Awfulhak.org> To: Larry Baird <lab@gta.com> Cc: freebsd-net@FreeBSD.ORG, brian@Awfulhak.org Subject: Re: PPPoE performance difference Message-ID: <200205150258.g4F2wJ20008115@hak.lan.Awfulhak.org> In-Reply-To: Message from Larry Baird <lab@gta.com> of "Tue, 30 Apr 2002 16:32:37 EDT." <20020430163237.A71846@gta.com>
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Hi, The performance problem here is due to deflate compression being used. Compression is quite expensive (more so than decompression) and the slow machine is losing out here. If you ``disable deflate pred1 mppe'' and ``deny deflate pred1 mppe'' you should see better results. > I had a friend that was claiming that they were seeing poor PPPoE > performance from FreeBSD 4.4 as compared to Win2K. Since he is in > Japan and I am in the US its a bit difficult to do hands on trouble > shooting. So I decided to set up my on PPPoE server and see if I > could reduplicate any of his claims. > > I setup a 4.5-RELEASE box as my PPPoE server and a 4.5-STABLE box as > my PPPoE client. Both hosts are using Intel Pro 10/100 (fxp) nics. > The client is a relatively fast 999.72-MHz 686-class CPU. The server > is a slow 133.27-MHz 586-class CPU. > > I am seeing a performance difference that I can't explain. Coping of > a large file (2.6MB) using scp to the server from the client takes > about 7 seconds. Coping the same file from the server to the client > takes 14 seconds. Any body have any idea why the two directions are > so different? > > BTW, copying the file over ethernet (not PPPoE) takes 3 seconds in > both directions between the same hosts using the same nics. > > The ppp.conf file for the server is: > default: > # set log Phase Chat LCP IPCP CCP tun command > enable mssfixup > set log error > ident user-ppp VERSION (built COMPILATIONDATE) > set dns 10.10.1.7 10.10.1.9 > accept dns > allow users > enable chap > enable pap > set timeout 0 > enable lqr > accept lqr > enable sroutes > > gta3: > allow mode direct > set mru 1492 > set mtu 1492 > set speed sync > set ifaddr 10.199.2.1 10.199.2.110-10.199.2.200 255.255.255.255 > > For the client I used the following ppp.conf > default: > set socket none > > PPP0: > set redial 0 0 > set timeout 0 > set reconnect 20 50000 > set ifaddr 0.0.0.0/0 0.0.0.0/0 > accept chap > disable pap > set authname testuser3 > set authkey testpass > set ctsrts off > enable dns > set dns 10.0.0.1 10.0.0.2 > resolv readonly > enable lqr > set lqrperiod 20 > accept lqr > accept acfcomp > accept protocomp > accept pred1 > accept vjcomp > set log error > set openmode active > enable mssfixup > set device PPPoE:fxp0:gta3 > set speed sync > set dial > set cd 10 > set login > set mru 1492 > set mtu 1492 > > > Thanks for your time, > Larry > > > -- > ------------------------------------------------------------------------ > Larry Baird | http://www.gnatbox.com > Global Technology Associates, Inc. | Orlando, FL > Email: lab@gta.com | TEL 407-380-0220, FAX 407-380-6080 -- Brian <brian@Awfulhak.org> <brian@freebsd-services.com> <http://www.Awfulhak.org>; <brian@[uk.]FreeBSD.org> Don't _EVER_ lose your sense of humour ! <brian@[uk.]OpenBSD.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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