From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758212AbYGRN2R (ORCPT ); Fri, 18 Jul 2008 09:28:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755035AbYGRN2G (ORCPT ); Fri, 18 Jul 2008 09:28:06 -0400 Received: from casper.infradead.org ([85.118.1.10]:56943 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751326AbYGRN2E (ORCPT ); Fri, 18 Jul 2008 09:28:04 -0400 Subject: Re: Problem: Load average of 6, no I/O, 25% idle time. Why? From: Peter Zijlstra To: Timothy Normand Miller Cc: linux-kernel@vger.kernel.org In-Reply-To: <9871ee5f0807180549l58e849d9ge6e7deee3d0c37fa@mail.gmail.com> References: <9871ee5f0807180549l58e849d9ge6e7deee3d0c37fa@mail.gmail.com> Content-Type: text/plain Date: Fri, 18 Jul 2008 15:28:36 +0200 Message-Id: <1216387716.28405.45.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2008-07-18 at 08:49 -0400, 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? Please share at least your .config when reporting such issues. Furthermore, could you try .26 and or Linus' latest -git to see if the issue is still present?