Date: Mon, 08 Oct 2001 08:41:23 -0500 From: Eric Anderson <anderson@centtech.com> To: Danny Braniss <danny@cs.huji.ac.il> Cc: freebsd-hackers@freebsd.org, stable@freebsd.org Subject: Re: strange network performace Message-ID: <3BC1AD03.127B3B21@centtech.com> References: <E15qaaZ-0000Cl-00@pampa.cs.huji.ac.il>
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And what happens when you go from A or B to C? Have you been running a top or systat -vmstat while this is happening? I'm thinking it might be a purely IO thing, on the proc box. I have seen similar slowness with the default FreeBSD install on single proc boxes, but a few sysctl's seem to do the trick. Eric Danny Braniss wrote: > > > How many times did you run the test? Could it have been cached in host B, but not C? What about disk performance? > > Maybe one is ATA66 or 100, and tthe other is not? Host C may only be UDMA33, and possibly have a slow drive, with a > > lower amount of memory for caching. Did you rebuild kernels on any of them? > > > > so many questions :-)! > > the test were run many times, on host C the port was changed, the cable was > changed, the NIC was changed. > > the disk is not relevant, the test uses a small program i wrote that writes > from memory. > > at the moment all three run the same version of the kernel, the only diff is > that A & B are smp, and C is not. > > danny -- ------------------------------------------------------------- Eric Anderson anderson@centtech.com Centaur Technology # rm -rf /bin/laden ------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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