From owner-freebsd-current@FreeBSD.ORG Thu Aug 25 07:35:40 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E56C616A41F for ; Thu, 25 Aug 2005 07:35:40 +0000 (GMT) (envelope-from josh.carroll@gmail.com) Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.206]) by mx1.FreeBSD.org (Postfix) with ESMTP id 712EA43D48 for ; Thu, 25 Aug 2005 07:35:40 +0000 (GMT) (envelope-from josh.carroll@gmail.com) Received: by wproxy.gmail.com with SMTP id i1so88469wra for ; Thu, 25 Aug 2005 00:35:37 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=AE0/Uqo8R3dg/D/c4xrwZZCoDmDS+wAJuCO4avxDSg/PQnZq9t7fIFFmyGjAnqEqfmMnvksZbyl/K8fbhQOe3IhODIJmp7aX6OjS/4r2QZC5upvCW+enhJQ2Ny6ZMFtpQEaUegyevzk55b/c3V7Lq/3eQ4sThda9IDnCocj892U= Received: by 10.54.118.16 with SMTP id q16mr1639450wrc; Thu, 25 Aug 2005 00:35:37 -0700 (PDT) Received: by 10.54.14.51 with HTTP; Thu, 25 Aug 2005 00:35:37 -0700 (PDT) Message-ID: <8cb6106e0508250035f066aa1@mail.gmail.com> Date: Thu, 25 Aug 2005 00:35:37 -0700 From: Josh Carroll To: freebsd-current@freebsd.org In-Reply-To: <430D6C0F.1070909@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <430D68D4.50609@drexel.edu> <430D6C0F.1070909@freebsd.org> Subject: Re: On a hyperthreaded system, top and gnome system monitor only report one processor X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: josh.carroll@psualum.com List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Aug 2005 07:35:41 -0000 Speaking of which, is hyperthreading in 6.0 with ULE to the point where it actually increases performance for multi-threaded processes or parallel compilations (make -j N)? Obviously this is situation dependent. I guess the better question is whether HT is able to provide a performance increase in 6.0 like it purports to do? I've heard that it's not quite "there yet", so I'm cautious about enabled SMP support and HT support on a P4-HT system. Josh On 8/24/05, Colin Percival wrote: > Justin R. Smith wrote: > > FreeBSD jsmith.org 6.0-BETA3 FreeBSD 6.0-BETA3 #0: Tue Aug 23 08:04:37 > > EDT 2005 jsmith@jsmith.org:/usr/obj/usr/src/sys/MYKERNEL i386 > > > > Top lists all process as being run by processor 0 > > > > The gnome system monitor lists only processor 0 as well (under gentoo > > linux it shows two). >=20 > Hyperthreading is disabled by default for security reasons. If you want > to enable it (which is generally safe on single-user systems), you should > add the following line to /boot/loader.conf : >=20 > machdep.hyperthreading_allowed=3D1 >=20 > Colin Percival > FreeBSD Security Officer > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " >