Date: Wed, 09 Jul 2003 15:29:43 -0500 From: Larry Rosenman <ler@lerctr.org> To: Jens Rehsack <rehsack@liwing.de>, Brooks Davis <brooks@one-eyed-alien.net> Cc: Lukas Ertl <l.ertl@univie.ac.at> Subject: Re: HTT on single CPU? Message-ID: <60470000.1057782583@lerlaptop-red.iadfw.net> In-Reply-To: <3F0C7A42.2080501@liwing.de> References: <20030708133504.L16193@pcle2.cc.univie.ac.at> <XFMail.20030708131344.jhb@FreeBSD.org> <20030709123734.GA50458@nagual.pp.ru> <3F0C0ED6.4030202@liwing.de> <20030709150718.GC28375@Odin.AC.HMC.Edu> <3F0C7A42.2080501@liwing.de>
next in thread | previous in thread | raw e-mail | index | archive | help
--On Wednesday, July 09, 2003 22:25:38 +0200 Jens Rehsack <rehsack@liwing.de> wrote: > Brooks Davis wrote: > >> >> P4's below ~3.1GHz do not actually provide logical CPU support. > > That's not true. German distributors sell P4 CPU's FSB 800 > (starting at 2.4GHz) which supports HTT. > > I know, that BSD didn't found 2 logical CPU's as John remarked, > but I didn't understood why the CPU has the feature for HTT but > no additional logical CPU's? ALL P-4's have the Feature Bit set, just not all of them have bits 23-16 of %ebx set to something greater than 1 on a cpuid instruction with %eax = 1. -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 972-414-9812 E-Mail: ler@lerctr.org US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?60470000.1057782583>