Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755111AbXLHQA5 (ORCPT ); Sat, 8 Dec 2007 11:00:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752270AbXLHQAt (ORCPT ); Sat, 8 Dec 2007 11:00:49 -0500 Received: from rv-out-0910.google.com ([209.85.198.191]:41959 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752231AbXLHQAs (ORCPT ); Sat, 8 Dec 2007 11:00:48 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=JfyPlKSV69NsAd8lNqzIsqb4oJvWb6oyoxkw24hJvle023kcGhFDJAwufkb70ceE9LKqkmGWEaGN9xOxquObWlqTmi+zU7+N/+uRt1RnocgJNliKgcDpnWFMn1p+cjSF2Boj1ZPFlfqa9xdZ0o9pHnjTmbGjR1+xv2aTMAFrnM4= Message-ID: <82e4877d0712080800j6572734ek78a76cf7bb17a7e0@mail.gmail.com> Date: Sat, 8 Dec 2007 11:00:47 -0500 From: "Parag Warudkar" To: "Ingo Molnar" Subject: Re: soft lockup - CPU#1 stuck for 15s! [swapper:0] Cc: "Thomas Gleixner" , "Pallipadi, Venkatesh" , LKML , "Andrew Morton" , "Linus Torvalds" In-Reply-To: <20071208154755.GA5255@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <82e4877d0712071453h38795e36of26324a4b123fa6c@mail.gmail.com> <924EFEDD5F540B4284297C4DC59F3DEE38C3C2@orsmsx423.amr.corp.intel.com> <82e4877d0712080710g205ba93ag12ee204b15d70fdb@mail.gmail.com> <82e4877d0712080736v12c1e31at9149655ae000fe50@mail.gmail.com> <20071208154755.GA5255@elte.hu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 982 Lines: 43 On Dec 8, 2007 10:47 AM, Ingo Molnar wrote: > > does the patch below help? But the root cause is likely some timer > problems - do you get consistent results from: > Haven't yet tried the patch - will try a little later. > while :; do time usleep 1111111; done > > or do these sleeps fluctuate? > They seem to fluctuate - not sure if that's supposed to be exact or if below variations are normal - This is when my compiles are running - [parag@mini ~]$ while :; do time usleep 1111111; done real 0m1.116s user 0m0.000s sys 0m0.000s real 0m1.112s user 0m0.000s sys 0m0.000s real 0m1.130s user 0m0.000s sys 0m0.004s real 0m1.144s user 0m0.000s sys 0m0.000s Thanks Parag -- 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/