Date: Tue, 1 Jun 2004 19:46:12 -0700 (PDT) From: Luke <luked@pobox.com> To: Robert Watson <rwatson@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Cap on network speed in CURRENT? Message-ID: <Pine.NEB.4.60.0406011927170.29037@sdf.lonestar.org> In-Reply-To: <Pine.NEB.3.96L.1040601222058.6295C-100000@fledge.watson.org> References: <Pine.NEB.3.96L.1040601222058.6295C-100000@fledge.watson.org>
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>> This is indeed a very slow host, by modern standards. It's a fussy old >> Pentium 166MHz that I've put through hell for the last eight years or >> so. >> >> I'm building a kernel with witness and invariants turned off. Building >> a kernel usually takes overnight. I'll try it out tomorrow and see how >> it goes. If those testing programs don't require X, I'll see about >> installing one of them to help me figure out what's going on. The iperf >> site looks like it's got some helpful information that I should read >> too. > > Also, try disabling SMP and possibly APIC support if it's a UP box. > There's a measurable performance overhead to compiling with SMP support, > since mutexes have to be compiled with locked instructions. This is a dual processor box, but I gave up and took SMP and APIC out of the kernel back in mid-April because the system would always panic on startup if I had both multiprocessor support and a RAID array defined at the same time. I made a thread about it on freebsd-questions but got no responses, so in complete bafflement I just turned off the multiprocessor support and rebuilt everything. The RAID was more important to me. http://docs.FreeBSD.org/cgi/mid.cgi?Pine.NEB.4.58.0404292248590.14141 I wouldn't be a bit surprised if that's a hardware problem. This old motherboard has a lot of quirks and I think it's probably going to die the next time I open the case. Thanks for the tip though. I wouldn't have thought of that.
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