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>
next in thread | previous in thread | raw e-mail | index | archive | help
--rJwd6BRFiFCcLxzm Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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=20 > p4. Naturally, it is enabled in the bios. To enable hyperthreading do I= =20 > need to recompile my kernel with smp support, and if so...does this apply= to=20 > freebsd 5.1 release as well? (my friend wants to know). Additionally do= es=20 > changing the machdep.cpu_idle_hlt to zero make it faster? Thanks in adva= nce. 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 --rJwd6BRFiFCcLxzm Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE/O8J8XY6L6fI4GtQRAheqAJ95jTNUwzsLUCl+4nWemHbvbaIyIwCgxua9 w7yh6F2eXYNUIaL1k9SOJdo= =N4NR -----END PGP SIGNATURE----- --rJwd6BRFiFCcLxzm--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030814171021.GB1806>