Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751307AbWAIUSH (ORCPT ); Mon, 9 Jan 2006 15:18:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751308AbWAIUSH (ORCPT ); Mon, 9 Jan 2006 15:18:07 -0500 Received: from zproxy.gmail.com ([64.233.162.201]:15054 "EHLO zproxy.gmail.com") by vger.kernel.org with ESMTP id S1751307AbWAIUSG convert rfc822-to-8bit (ORCPT ); Mon, 9 Jan 2006 15:18:06 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=PvxKWtW0E6w72he9QGwv0bYT+8C6DXnTFZSeCXqnDQdrjOMx4ZAlZ7ZMRvzj5AOQjG338vwchOdeoaHD0GSOAtSAOEyqlnPHcnTzwTpVwGUVqwwOSOq3eiDjWPaPA1QU1PK/UzG+W7pbR66fgHLXyudafuhQWSORkSNykUviMoM= Message-ID: <9a8748490601091218m1ff0607h79207cfafe630864@mail.gmail.com> Date: Mon, 9 Jan 2006 21:18:05 +0100 From: Jesper Juhl To: LKML List Subject: Athlon 64 X2 cpuinfo oddities MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2900 Lines: 87 I recently bought a Dual Core AMD Athlon 64 X2 4400+ CPU and dropped a 2.6.15 kernel on the box and it runs very nice, but /proc/cpuinfo shows a few things that seem slightly odd to me (haven't tried earlier kernels on this so I don't know if cpuinfo looked different previously). It may be that it's absolutely correct and not odd at all, but I thought I'd just ask :) Here's what cat /proc/cpuinfo shows : juhl@dragon:~$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 35 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ stepping : 2 cpu MHz : 2200.260 cache size : 1024 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 4403.36 processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 35 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ stepping : 2 cpu MHz : 2200.260 cache size : 1024 KB physical id : 127 siblings : 1 core id : 1 cpu cores : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow pni lahf_lm cmp_legacy bogomips : 4399.53 So, what's odd with that? Well, first of all you'll notice that the second core shows a "physical id" of 127 while the first core shows an id of 0. Shouldn't the second core be id 1, just like the "core id" fields are 0 & 1? Second thing I find slightly odd is the lack of "sse3" in the "flags" list. I was under the impression that all AMD Athlon 64 X2 CPU's featured SSE3? Is it a case of: a) Me being wrong, not all Athlon 64 X2's feature SSE3? b) The CPU actually featuring SSE3 but Linux not taking advantage of it? c) The CPU features SSE3 and it's being utilized, but /proc/cpuinfo doesn't show that fact? d) Something else? -- Jesper Juhl Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html - 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/