Date: Fri, 10 Dec 2004 19:57:15 +0000 From: "Colin J. Raven" <colin@kozy-kabin.nl> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: [Fwd: HTT/SMP servers instability on 5.3-STABLE] Message-ID: <Pine.NEB.4.61.9.0412101953340.579@kenmore.kozy-kabin.nl> In-Reply-To: <41B9F042.4040700@raad.tartu.ee> References: <36661.194.210.13.66.1102680032.squirrel@194.210.13.66> <Pine.NEB.4.61.9.0412101925040.579@kenmore.kozy-kabin.nl> <41B9F042.4040700@raad.tartu.ee>
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On Dec 10, Toomas Aas launched this into the bitstream: > Colin J. Raven wrote: > >> On Dec 10, Toomas Aas launched this into the bitstream: >> >>> For more than a month now, I've been running a Dual Xeon 2000 system (IBM >>> eServer xSeries 225) with 5.3-RC2 and later upgraded to 5.3-RELEASE and I >>> have no problems at all. Hyperthreading is disabled in BIOS, ACPI is >>> enabled. >> >> >> Excuse me for jumping into this thread but could you elaborate as to why >> you have Nyperthreading disabled? > > I'm afraid I can't give you any good technical reasons. I simply think of HTT > as Intel marketing blurb, meant to make you feel like you are getting two > CPUs for the price of one. Well, actually it's still only one CPU. I've been > running another single Xeon 2.4 box for more than a year. Initially, I ran > several months with HTT enabled. Then I ran several months with HTT disabled. > I didn't really notice any performance difference. Well thanks for sharing those observations. Until I read what you said I *assumed* that there was a performance difference with HTT enabled. The specs seem to show that there *is* a theoretical difference, yet clearly according to your observations there just isn't any difference of earth shaking proportions. Much appreciated! Regards, -Colin -- Colin J. Raven NetBSD on a Cobalt Qube2 - http://www.NetBSD.org - Fri Dec 10 19:56:00 UTC 2004 7:56PM up 4:09, 5 users, load averages: 1.11, 1.16, 1.16
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