Date: 11 Sep 2005 09:42:38 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: <freebsd-questions@freebsd.org> Subject: Re: Slow transfers to 5.4 / 4.11 is ok Message-ID: <44ek7vyb3l.fsf@be-well.ilk.org> In-Reply-To: <AEF86EFA5497434190F6D57E2666EA7A1D56D2@ERWIN.intern.seceidos.de> References: <AEF86EFA5497434190F6D57E2666EA7A1D56D2@ERWIN.intern.seceidos.de>
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"Jan-Peter Koopmann" <Jan-Peter.Koopmann@seceidos.de> writes: > we are experiencing a very strange problem. All transfers from > Windows XP boxes to our new FreeBSD 5.4 installation seem to be > quite slow. The 5.4 is located in a housing center and we try to > access it from behind 3MBit DSL lines. Instead of the expected > ~320KByte/sec we only get 220KByte/sec. If I use a FreBSD, OSX or > linux machine behind the same router to download stuff from our 5.4 > machine, everything is in perfect order. If I access 4.11 > installations from the same Windows XP machines, everything is fine > as well: > > Linux -> 5.4: ~320K > FreeBSD 4 -> 5.4: ~320K > Windows XP -> 5.4: ~220K > Windows XP -> 4.x: ~320K > > Prior to the 5.4 box we had a 4.11 machine at the same location, > same routers clients etc. Again: Until we changed the box download > speed were ok. MTU etc. seem to be correct as well. This also > happens from several locations with different setups, providers > etc. always with the results shown above. So we are pretty confident > that some change between 4.X and 5.4 breaks the transfer rates when > it comes to Windows XP. > > Do any of you have an idea where we could/should look for? Are there any timing issues corrected/changed in 5.X? What protocols are you using? NIC cards? Are you seeing collisions? What is the overall utilization of the links involved? -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/
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