Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753462Ab0HTUqJ (ORCPT ); Fri, 20 Aug 2010 16:46:09 -0400 Received: from mail-ey0-f174.google.com ([209.85.215.174]:47118 "EHLO mail-ey0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752719Ab0HTUqG (ORCPT ); Fri, 20 Aug 2010 16:46:06 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=bIuIemp0Gxhx2GCVDhMf7isYTHaO0sv7IqKnIgZxq6zej+8ptZnnhfxVD5ZQ+X7pxu cMidML1/BkwH5OrSdJA5LZnRvpyozOrSCDzf6lVBQ79bvxyjtd6m//tKz0TgYQ3s26iZ DXTRIzICSH/03OxcZI5Rxm6z6IYdYm+aFTL8M= Date: Sat, 21 Aug 2010 00:45:58 +0400 From: Cyrill Gorcunov To: Ingo Molnar Cc: Don Zickus , Peter Zijlstra , Robert Richter , Lin Ming , "fweisbec@gmail.com" , "linux-kernel@vger.kernel.org" , "Huang, Ying" , Yinghai Lu , Andi Kleen Subject: Re: [PATCH -v3] perf, x86: try to handle unknown nmis with running perfctrs Message-ID: <20100820204558.GA15530@lenovo> References: <1282214753.1926.4669.camel@laptop> <20100819141240.GO4879@redhat.com> <1282228033.2605.204.camel@laptop> <20100820015017.GA4879@redhat.com> <20100820081605.GD17551@elte.hu> <1282298651.2605.769.camel@laptop> <20100820123901.GE4879@redhat.com> <20100820132737.GD3321@elte.hu> <20100820135118.GI4879@redhat.com> <20100820141703.GA29697@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100820141703.GA29697@elte.hu> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 958 Lines: 30 On Fri, Aug 20, 2010 at 04:17:03PM +0200, Ingo Molnar wrote: > > it's not working so well, i'm getting: > > Uhhuh. NMI received for unknown reason 00 on CPU 9. > Do you have a strange power saving mode enabled? > Dazed and confused, but trying to continue > > on a nehalem box, after a perf top and perf stat run. > > Thanks, > > Ingo > Might not this be the case of AAN93 erratum, which says the following | The processor can be configured to issue a PMI (performance monitor interrupt) | upon overflow of the IA32_FIXED_CTR0 MSR (309H). A single PMI should be observed on | overflow of IA32_FIXED_CTR0, however multiple PMIs are observed when this | erratum occurs. Just a thought. -- Cyrill -- 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/