From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753821AbbCQSwK (ORCPT ); Tue, 17 Mar 2015 14:52:10 -0400 Received: from cantor2.suse.de ([195.135.220.15]:39021 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752096AbbCQSwH (ORCPT ); Tue, 17 Mar 2015 14:52:07 -0400 Date: Tue, 17 Mar 2015 19:50:33 +0100 From: Borislav Petkov To: poma Cc: Community support for Fedora users , stan , Linux Kernel list Subject: Re: How to increase maximum user cpu usage allowed on a multi core system? Message-ID: <20150317185033.GL18917@pd.tnic> References: <20150309120339.68ea8374@vfemail.net> <550873A0.5030009@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <550873A0.5030009@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 17, 2015 at 07:34:08PM +0100, poma wrote: > On 09.03.2015 20:03, stan wrote: > > I'm running Fedora 21 with a custom compiled kernel, > > 3.19.0-1.20150211.fc21.x86_64. > > > > I have a multi core system with 6 cores. All are recognized by the > > kernel. > > > > But, when I run a compile job with -j6, in order to allow all six cores > > to be used, it limits the total amount of usage to 100% of a *single* > > core. So, it might use all six cores, but the sum of the percentages > > on those six cores is always around 100% of one core. This is from > > htop output. Let me try to understand this correctly? You're building the kernel with make -j6 but in htop you're seeing a single core at 100% and the rest are idle? Yes, no? What exact steps are you doing to build the kernel? Type them here please so that I can do them exactly on my system too. Also, please send a full dmesg from your system, private message is fine too. Thanks. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --