Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 14 Nov 2001 10:08:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 14 Nov 2001 10:08:40 -0500 Received: from nick.dcs.qmul.ac.uk ([138.37.88.61]:45030 "EHLO nick.dcs.qmul.ac.uk") by vger.kernel.org with ESMTP id ; Wed, 14 Nov 2001 10:08:27 -0500 Date: Wed, 14 Nov 2001 15:08:25 +0000 (GMT) From: Matt Bernstein To: Arjan van de Ven cc: Alastair Stevens , Subject: Re: Athlon SMP blues - kernels 2.4.[9 13 15-pre4] In-Reply-To: <3BF285D7.8F5AAB6E@redhat.com> Message-ID: X-URL: http://www.theBachChoir.org.uk/ MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org At 14:55 -0000 Arjan van de Ven wrote: >Alastair Stevens wrote: >> >> Hi folks - I'm having real problems getting our new dual CPU server >> going. It's a 2x Athlon XP 1800+ on a Tyan mobo, AMD 760MP chipset, with > >Ehm you know that XP cpu's don't support SMP configuration ? I hope they do; I've just set up a very similar beast (looks like the same mobo and same CPUs). Is the RAM "registered" ECC? Are your CPUs the same stepping? One problem we were bitten by was the Radeon DRI, so we disabled it (in XF86Config-4) and it now seems to at least boot into X. However, it's not any faster than a dual PIII (1GHz) at the task it's meant to perform :( both CPUs report 75% usage, and vmstat 1 doesn't show the IO systems being slugged. Very strange. We're wondering if we've hit memory bandwidth as the tasks involve some hard sums with big matrices. $ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 6 model name : AMD Athlon(tm) Processor stepping : 2 cpu MHz : 1526.519 cache size : 256 KB 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 mmx fxsr sse syscall mmxext 3dnowext 3dnow bogomips : 3047.42 processor : 1 vendor_id : AuthenticAMD cpu family : 6 model : 6 model name : AMD Athlon(tm) Processor stepping : 2 cpu MHz : 1526.519 cache size : 256 KB 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 mmx fxsr sse syscall mmxext 3dnowext 3dnow bogomips : 3047.42 - 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/