Date: Tue, 18 Mar 2003 17:43:14 -0800 From: Brooks Davis <brooks@one-eyed-alien.net> To: Gregory Bond <gnb@itga.com.au> Cc: Brooks Davis <brooks@one-eyed-alien.net>, stable@FreeBSD.ORG Subject: Re: Hyperthreading in 4.8RC Message-ID: <20030318174314.A26196@Odin.AC.HMC.Edu> In-Reply-To: <200303190124.MAA15190@lightning.itga.com.au>; from gnb@itga.com.au on Wed, Mar 19, 2003 at 12:24:22PM %2B1100 References: <200303190124.MAA15190@lightning.itga.com.au>
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[-- Attachment #1 --] On Wed, Mar 19, 2003 at 12:24:22PM +1100, Gregory Bond wrote: > > That CPU doesn't really support hyperthreading except in the vacuous > > sense. It's got enough support that you can boot an SMP kernel, but > > plain P4's below 3.06GHz don't actually have additional logical CPUs > > available. > > Thanks, that sort-of makes sense. What buzz-words do I need to look for when > shopping for CPU and/or MB? If I get the appropriately fast CPU, will any ol' > S478 MB do or does there need to be special support there too? You need a 3.06Mhz P4 or any Xeon to get HTT support. I believe any motherboard that supports those CPUs will work, but if you have an older one, you might need a BIOS upgrade. Be aware that depending on your appliction mix, HTT may help and it may hurt. That's why there's a kernel option. -- Brooks -- Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+d8syXY6L6fI4GtQRArJgAKC1EGXKNr9St6ut9iWRMeHG5OPw2wCffXJF mkPAuOg+vugn8Ru2X7f3bZ8= =cPaO -----END PGP SIGNATURE-----
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