Date: Mon, 25 Mar 2002 11:40:12 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Jeff Roberson <jroberson@chesapeake.net> Cc: current@freebsd.org Subject: RE: Peculiar(?) slowdown with -CURRENT as of 21 March Message-ID: <XFMail.20020325114012.jhb@FreeBSD.org> In-Reply-To: <20020322204145.J88743-100000@mail.chesapeake.net>
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On 23-Mar-2002 Jeff Roberson wrote: >> >> I saw some similar weirdness in my test machines last night where a dual >> processor DS20 (Alpha 21264 500x2) beat out a PII Xeon 450x4. Normally > the >> quad xeon beats the DS20. The quad xeon was using -j16 but was about 74% >> idle. >> The DS20 had used -j8. I didn't get a chacne to run top to see how it was >> doing during hte world since I didn't notice the weirdness until last > night >> after the DS20 had finsihed but the quad xeon was still chugging along. >> > > Are you both running with WITNESS and INVARIANTS? UMA is slightly slower > with these options on than the original malloc & vm_zone code. I'm not > sure why it would be even worse for SMP machines though. So maybe it > isn't UMA at all but it's worth looking into. Yes. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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