From owner-freebsd-stable Tue Mar 18 17: 2:48 2003 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D2E4237B401 for ; Tue, 18 Mar 2003 17:02:46 -0800 (PST) Received: from ns1.itga.com.au (ns1.itga.com.au [202.53.40.214]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2E63143F3F for ; Tue, 18 Mar 2003 17:02:45 -0800 (PST) (envelope-from gnb@itga.com.au) Received: from lightning.itga.com.au (lightning.itga.com.au [192.168.71.20]) by ns1.itga.com.au (8.12.8/8.12.6) with ESMTP id h2J12hcp076544 for ; Wed, 19 Mar 2003 12:02:43 +1100 (EST) (envelope-from gnb@itga.com.au) Received: from lightning.itga.com.au (localhost [127.0.0.1]) by lightning.itga.com.au (8.9.3/8.9.3) with ESMTP id MAA10267; Wed, 19 Mar 2003 12:02:43 +1100 (EST) Message-Id: <200303190102.MAA10267@lightning.itga.com.au> X-Mailer: exmh version 2.4 05/15/2001 with nmh-1.0.4 From: Gregory Bond To: stable@freebsd.org Subject: Hyperthreading in 4.8RC Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 19 Mar 2003 12:02:43 +1100 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I have an HP Vl420 (P4-1.6, i845 Mb). AFAIK, this MB is not an explicitly MP motherboard - it has only 1 CPU slot. The latest 4.8 kernel seems to show me that this CPU has Hyperthreading: CPU: Intel(R) Pentium(R) 4 CPU 1.60GHz (1594.10-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf12 Stepping = 2 Features=0x3febfbff (Feature HTT == hyperthreading, according to identcpu.c). So I added the SMP options (IOAPIC, SMP, HTT) to the kernal config and rebooted. It seems to be running OK, and I see lots of IOAPIC and SMP-like things in the dmesg, e.g.: FreeBSD/SMP: Multiprocessor motherboard cpu0 (BSP): apic id: 0, version: 0x00050014, at 0xfee00000 io0 (APIC): apic id: 2, version: 0x00178020, at 0xfec00000 but I don't see the Hyperthreading: 2 logical CPUs message that I would expect, nor any reference to cpu1. What does this imply? Do I need an "official" SMP motherboard to take advantage of Hyperthreading? Or do I need a XEON processor, not just a plain P4 (and if so, is the HTT Feature is lying to me?) Or is there some other magic I can perform to get it working on the current hardware? Can someone point me to an interesting document on all this? Thanks! Greg. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message