From owner-freebsd-smp Sat May 25 18:29:56 2002 Delivered-To: freebsd-smp@freebsd.org Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by hub.freebsd.org (Postfix) with ESMTP id A0E3537B403 for ; Sat, 25 May 2002 18:29:53 -0700 (PDT) Received: by elvis.mu.org (Postfix, from userid 1000) id 7442FAE027; Sat, 25 May 2002 18:29:53 -0700 (PDT) Date: Sat, 25 May 2002 18:29:53 -0700 From: Paul Saab To: John Polstra Cc: smp@freebsd.org, bright@mu.org Subject: Re: hyperthreading: myth or legend? (was Re: hyperthreading? (was Re: question)) Message-ID: <20020526012953.GA51786@elvis.mu.org> References: <20020514222840.GB1585@elvis.mu.org> <20020522172759.GV54960@elvis.mu.org> <200205260023.g4Q0N7Q31590@vashon.polstra.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200205260023.g4Q0N7Q31590@vashon.polstra.com> User-Agent: Mutt/1.3.27i Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org John Polstra (jdp@polstra.com) wrote: > FWIW, my experience has been different. Yesterday I tried both the > latest -current and 4.5-RELEASE on a Dell 2650, and both kernels > failed to probe the extra processor cores. My colleagues who have > been working with the system told me that XP does detect them. Maybe > XP stands for Xtra Processors? ;-) > > Under FreeBSD I ran the "mptable" command, and it lists only one CPU > per physical processor module. So at least for this particular BIOS, > the kernel would have to Just Know that each processor has 2 cores in > order to utilize them. You have to start the other cores. Peter has more info on how to do this. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message