From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261301AbVGLKSf (ORCPT ); Tue, 12 Jul 2005 06:18:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261302AbVGLKSe (ORCPT ); Tue, 12 Jul 2005 06:18:34 -0400 Received: from nproxy.gmail.com ([64.233.182.202]:41962 "EHLO nproxy.gmail.com") by vger.kernel.org with ESMTP id S261301AbVGLKSe convert rfc822-to-8bit (ORCPT ); Tue, 12 Jul 2005 06:18:34 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=Vn2tTKw1w/SbA/1vY21WlzoseCmHFWcNZmKsImFll2x5kUhKZpKBhM4MWRfRg0co3dJY4lvUYpm9ZwOCTzfM2hktW4UyO53McWmX7w7eyf4UyUu4YKzoXX/l8s7Je9Aily/XpYmBubW/XcUw1fql0sAvVU0gaWgUSWDRgkRupAo= Message-ID: <6278d22205071203185a50a104@mail.gmail.com> Date: Tue, 12 Jul 2005 11:18:32 +0100 From: Daniel J Blueman Reply-To: Daniel J Blueman To: Linux Kernel Subject: Re: Problems with more than 8 AMD Opteron Cores per System 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 I find the ondemand governor works as expected with 2.6.12 on my Athlon64 Winchester [1]; as soon as I bzip2 a file, processor freq is pinned at 1.8GHz and drops to 1GHz when idle. --- [1] $ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 31 model name : AMD Athlon(tm) 64 Processor 3000+ stepping : 0 cpu MHz : 1004.646 cache size : 512 KB 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 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow bogomips : 1988.83 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp Oliver Weihe wrote: > Hello, > > I've two Iwill 8way Opteron equipped with 8 Opteron 875 CPUs each. > (In the past we build some systems with singlecore CPUs and they went > very well) > > The Problem now is that the machines crash during boot when maxcpus is > greater than 8. > 2.6.12-rc4 works well with maxcpus=8, with 9 or more it freezes after > "Testing NMI Watchdog... OK" > > 2.6.12-rc5 and above have more problems even with maxcpus=4 or less very > early during booting. > > 2.6.13-X crashes later during boot (from 2 to 16 cores it's the same > behavior) > > The last I can so on the console (kernel 2.6.13-rc2-git4, maxcpus=2..16) > is: > > NET: Registered protocol family 1 > Using IPI Shortcut mode > int3: 0000 [1] SMP > CPU4 > Modules linked in: > Freeing unused kernel memory: 212k freed > Pid: 0, comm: swapper Not tainted 2.6.13-rc2-git4-default > RIP: 0010:[] > > After that the machines are totally freezed. > > With maxcpus=1 all (tested) versions >=2.6.12-rc3 are able to boot. > > Any hints/ideas/what ever? > > Regards, > Oliver Weihe > > P.S. if you answer CC me ;) ___ Daniel J Blueman