Date: Fri, 25 Jan 2002 13:43:33 -0800 From: Kent Stewart <kstewart@owt.com> To: Neil McGann <neil@neilmcgann.co.uk> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: UDMA and 100Mbit NIC speed issues Message-ID: <3C51D185.2090600@owt.com> References: <5.1.0.14.0.20020125204321.00a0f4c0@pop.ntlworld.com>
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Neil McGann wrote: > I'm seeing a problem with network upload speed using 4.4-Release when > the HD is in DMA mode. Basically the same as problem report kern/32338, > but the possible fix doesn't work for me. > > Machine is a ASUS Cuple-vm mobo (VIA PLE133), 400MHz celeron, Netgear > FA311 NIC and IBM 60GX 60Gb deskstar on ULTRA100. Network is full-duplex > thro a 100Mbit switch. > > Symptom is ftp upload is very slow in DMA HD mode 5 and much faster in > PIO mode. I see up/down of a (approx.) 100Mb file at 50s/29s in PIO and > 3m50s/33s in UDMA. I have an ECS-K7S5A and an Amptron 830LM that have on board ATA-100 and 100Mps networking. I am consistently seeing 11MB/s transfers between the systems. There are usually some shared IRQ such as the AGP and the 1st PCI slot. When I have an AGP video, I don't use the first slot. > > I have tried disabling the on-board video, and then using a 3Com 3C905B > NIC, but the massive slowdown is the same. I tried a different FA311 in > a dual-boot Linux 2.4.x/Win 2K machine with a 40Gb version of the same > IBM drive (but a ULTRA66 controller on a 1GHz PIII) and Linux showed > _exactly_ the same slow-down symptom as FreeBSD. Win2K didn't slow down > - it was faster overall in TCP/IP (40sec/15sec) and MUCH faster in SMB > (15sec/15sec). I don't have a 100MB file but I can transfer the packages for kde-2.2.2, which have a number of 9+MB files and see 11+MB/s on W2K. I don't see a difference in transfer rates on the SiS-735 chipset motherboards. Kent > > So - what is killing the performance in FreeBSD (and Linux) where Win2K > is much faster???? (is w2K doing adaptive disk throttling to maximise > network bandwith???) > > Anyone got suggestions of how to start looking at this? I'm relatively > new to freeBSD and very pleased with it overall, but on the same > hardware W2K wipes the floor with it on sheer network/disk speed (at > least on UDMA/100Mbit). > > Neil > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > > . > -- Kent Stewart Richland, WA mailto:kbstew99@hotmail.com http://users.owt.com/kstewart/index.html FreeBSD News http://daily.daemonnews.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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