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Newsgroups: comp.unix.bsd.freebsd.misc Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.mira.net.au!news.vbc.net!news.cais.net!news.ac.net!imci4!newsfeed.internetmci.com!in1.uu.net!news.eng.convex.com!arco!not-for-mail From: rll@marvin.corp.arco.com (Richard L. Lamb) Subject: Slow 3C509 - More data X-Nntp-Posting-Host: 138.241.53.178 Message-ID: <4jcb0i$cl@marvin.corp.arco.com> Lines: 38 Sender: usenet@news.arco.com Organization: ARCO Corporate Date: Wed, 27 Mar 1996 21:12:50 GMT I posted last week concerning slow performance from a 3C509. I was getting 100Kbytes/sec from a Sun 10/51 to my 486/33, which typically was good for 700-800Kbytes/sec under Linux. I haven't solved the problem yet, but I have done some further testing. I deliberately mismatched the 3C509's IRQ setting with what the kernel expected. Result: 100Kbytes/sec. I swapped out the 3C509 for a 3C507. Result: 100Kbytes/sec. This seemed a bit too coincidental, so I repeated the 3C507 test using /dev/null as the local target of the FTP. Result: 600Kbytes/sec! I don't think the problem is a slow disk subsystem; I can copy a 2MB file in the blink of an eye. Here's a bit more detail on the system configuration: AST Power Premium 486DX/33 16MB RAM EISA bus Adaptec 1740 SCSI controller, Enhanced mode Maxtor 340MB and Seagate 1GB SCSI disks Wangtek 5150ES SCSI tape Toshiba 3401 SCSI CDROM ATI Graphics Ultra (Mach 8) and of course the 3C509 or 3C507 Ethernet adapters. Yes, I know all this is aging hardware and that much newer and faster stuff is available :-) Being brand new to the FreeBSD world, I'm at a loss---this is just too weird. If anyone has any suggestions, I'd be grateful. Thanks, Richard Lamb rll@marvin.corp.arco.com