Date: Thu, 14 Aug 2003 10:10:30 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: "David R. Colyer" <davedillinger@wyoming.com> Cc: freebsd-current@freebsd.org Subject: Re: Dual P4 2.4Ghz Xeon With Hyperthreading enabled... Message-ID: <20030814171021.GB1806@Odin.AC.HMC.Edu> In-Reply-To: <200308140959.58487.davedillinger@wyoming.com> References: <XFMail.20030813125214.jhb@FreeBSD.org> <200308140959.58487.davedillinger@wyoming.com>
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[-- Attachment #1 --] On Thu, Aug 14, 2003 at 09:59:58AM -0600, David R. Colyer wrote: > No doubt this has been answered before, but I have an asus p4pe with a 3.06 > p4. Naturally, it is enabled in the bios. To enable hyperthreading do I > need to recompile my kernel with smp support, and if so...does this apply to > freebsd 5.1 release as well? (my friend wants to know). Additionally does > changing the machdep.cpu_idle_hlt to zero make it faster? Thanks in advance. Yes, you need SMP support in all releases. As to your second question, define faster. It depends heavily on your appliction mix. My guess is that on a UP system which is doing something other then running a single compute bound process it's going to be a minor win, but only measurement will tell you anything. -- Brooks [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE/O8J8XY6L6fI4GtQRAheqAJ95jTNUwzsLUCl+4nWemHbvbaIyIwCgxua9 w7yh6F2eXYNUIaL1k9SOJdo= =N4NR -----END PGP SIGNATURE-----
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