Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762159AbXERSqP (ORCPT ); Fri, 18 May 2007 14:46:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756707AbXERSqF (ORCPT ); Fri, 18 May 2007 14:46:05 -0400 Received: from terminus.zytor.com ([192.83.249.54]:42037 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756424AbXERSqE (ORCPT ); Fri, 18 May 2007 14:46:04 -0400 Message-ID: <464DF467.8080108@zytor.com> Date: Fri, 18 May 2007 11:45:59 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: Bernd Eckenfels CC: linux-kernel@vger.kernel.org Subject: Re: ht CPU flag References: In-Reply-To: X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1016 Lines: 24 Bernd Eckenfels wrote: > In article you wrote: >> I have Pentium D CPU, which many Windows utilities like cpuz, wcpuid, >> everest identify as D 930 (Dual Core, 3GHz). From Intel site I find out >> that it has no HT feature, nor Windows XP identify it as HT. > > the ht flag reported by the CPU and cpuinfo is not a reliable detection if > HT is available on your CPU or your motherboard/bios. > >> Why do I have "ht" flag in cpuinfo? > > Because your CPU reports it. You will see that also in cpuz output. > > However, you can see ht in the sibblings value (for a single core it will be > 2 if you have HT, I am not sure if it is 4 for a dual core CPU) IIRC, the HT flag is also reported for multicore CPUs. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/