From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753300AbaEPCvg (ORCPT ); Thu, 15 May 2014 22:51:36 -0400 Received: from mail-ee0-f48.google.com ([74.125.83.48]:59711 "EHLO mail-ee0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753039AbaEPCve (ORCPT ); Thu, 15 May 2014 22:51:34 -0400 Message-ID: <1400208690.7133.11.camel@marge.simpson.net> Subject: Re: [ISSUE] sched/cgroup: Does cpu-cgroup still works fine nowadays? From: Mike Galbraith To: Michael wang Cc: Peter Zijlstra , Rik van Riel , LKML , Ingo Molnar , Alex Shi , Paul Turner , Mel Gorman , Daniel Lezcano Date: Fri, 16 May 2014 04:51:30 +0200 In-Reply-To: <5375768F.1010000@linux.vnet.ibm.com> References: <20140513094737.GU30445@twins.programming.kicks-ass.net> <53721FD4.6060300@redhat.com> <20140513142328.GE2485@laptop.programming.kicks-ass.net> <53731D12.7040804@linux.vnet.ibm.com> <20140514094426.GF30445@twins.programming.kicks-ass.net> <5374387E.4080802@linux.vnet.ibm.com> <20140515083531.GE30445@twins.programming.kicks-ass.net> <53747EE4.3020605@linux.vnet.ibm.com> <20140515090638.GI30445@twins.programming.kicks-ass.net> <53748A5D.6070605@linux.vnet.ibm.com> <20140515115751.GK30445@twins.programming.kicks-ass.net> <5375768F.1010000@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2014-05-16 at 10:23 +0800, Michael wang wrote: > But we found that one difference when group get deeper is the tasks of > that group become to gathered on CPU more often, some time all the > dbench instances was running on the same CPU, this won't happen for l1 > group, may could explain why dbench could not get CPU more than 100% any > more. Right. I played a little (sane groups), saw load balancing as well. -Mike