From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755722AbYGTXje (ORCPT ); Sun, 20 Jul 2008 19:39:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752956AbYGTXj0 (ORCPT ); Sun, 20 Jul 2008 19:39:26 -0400 Received: from wa-out-1112.google.com ([209.85.146.176]:60690 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752922AbYGTXjZ (ORCPT ); Sun, 20 Jul 2008 19:39:25 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=a0Pe4r6uFevr5Csvr7Tp25m7BSxpIVj0XxbckeXV40+4a7OfKph34lPyFCfsKcgjfY 7Si8InJO4P/yJBvf04H+TZVMEBI5PsIdv8w8qceo2j9W+Z65/7oBMxMKhVmzblEp8paM wdaHeNPAyMS10ydINivrOspoUczXA4kHQkP64= Message-ID: <9871ee5f0807201639l229280abg1d6a25fcbeaa2b4d@mail.gmail.com> Date: Sun, 20 Jul 2008 19:39:24 -0400 From: "Timothy Normand Miller" To: linux-kernel@vger.kernel.org Subject: Re: Problem: Load average of 6, no I/O, 25% idle time. Why? In-Reply-To: <9871ee5f0807180549l58e849d9ge6e7deee3d0c37fa@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <9871ee5f0807180549l58e849d9ge6e7deee3d0c37fa@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 18, 2008 at 8:49 AM, Timothy Normand Miller wrote: > I have a four processor box, running three compute loads. The kernel > I'm running is 2.6.25-gentoo-r5. > > One process has four threads, and it's niced to 19. > Another process has one thread and is niced to -10 > The last process has one thread and is niced to 0 > > One processor is always idle. > > If I change either the 0 to a -10 or the -10 to a zero, then all four > cores are properly utilized. > > Does this make sense to anyone? Besides messing with the nice levels, > is there another way to fix this? I updated to kernel 2.6.26-gentoo, and I no longer see any of the problems I observed. No idle time under any circumstances where the system has plenty of work to do and no I/O waiting. Thanks, everyone! -- Timothy Normand Miller http://www.cse.ohio-state.edu/~millerti Open Graphics Project