From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751596AbdFFJWQ (ORCPT ); Tue, 6 Jun 2017 05:22:16 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:58960 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751274AbdFFJWO (ORCPT ); Tue, 6 Jun 2017 05:22:14 -0400 Date: Tue, 6 Jun 2017 11:21:58 +0200 From: Peter Zijlstra To: Matt Fleming Cc: mingo@kernel.org, tglx@linutronix.de, riel@redhat.com, hpa@zytor.com, efault@gmx.de, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, lvenanci@redhat.com, xiaolong.ye@intel.com, kitsunyan@inbox.ru, clm@fb.com Subject: Re: hackbench vs select_idle_sibling; was: [tip:sched/core] sched/fair, cpumask: Export for_each_cpu_wrap() Message-ID: <20170606092158.wqaianvbyhs5k6xk@hirez.programming.kicks-ass.net> References: <20170414122005.o35me2h5nowqkxbv@hirez.programming.kicks-ass.net> <20170517105350.hk5m4h4jb6dfr65a@hirez.programming.kicks-ass.net> <20170519150035.GA2879@codeblueprint.co.uk> <20170605130021.GA3339@codeblueprint.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170605130021.GA3339@codeblueprint.co.uk> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 05, 2017 at 02:00:21PM +0100, Matt Fleming wrote: > On Fri, 19 May, at 04:00:35PM, Matt Fleming wrote: > > On Wed, 17 May, at 12:53:50PM, Peter Zijlstra wrote: > > > > > > Please test.. > > > > Results are still coming in but things do look better with your patch > > applied. > > > > It does look like there's a regression when running hackbench in > > process mode and when the CPUs are not fully utilised, e.g. check this > > out: > > This turned out to be a false positive; your patch improves things as > far as I can see. Hooray, I'll move it to a part of the queue intended for merging. Thanks!