From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CBED3C43142 for ; Tue, 31 Jul 2018 12:11:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68C42208A2 for ; Tue, 31 Jul 2018 12:11:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 68C42208A2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732084AbeGaNvA (ORCPT ); Tue, 31 Jul 2018 09:51:00 -0400 Received: from foss.arm.com ([217.140.101.70]:53126 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731880AbeGaNvA (ORCPT ); Tue, 31 Jul 2018 09:51:00 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DD3FE80D; Tue, 31 Jul 2018 05:10:57 -0700 (PDT) Received: from [10.4.12.39] (e113632-lin.emea.arm.com [10.4.12.39]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8D0083F5D0; Tue, 31 Jul 2018 05:10:56 -0700 (PDT) Subject: Re: [PATCHv4 00/12] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems To: Peter Zijlstra , Morten Rasmussen Cc: mingo@redhat.com, dietmar.eggemann@arm.com, vincent.guittot@linaro.org, gaku.inami.xh@renesas.com, linux-kernel@vger.kernel.org References: <1530699470-29808-1-git-send-email-morten.rasmussen@arm.com> <20180731120057.GS2476@hirez.programming.kicks-ass.net> From: Valentin Schneider Message-ID: Date: Tue, 31 Jul 2018 13:10:49 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180731120057.GS2476@hirez.programming.kicks-ass.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Peter, On 31/07/18 13:00, Peter Zijlstra wrote: > > > Aside from the first patch, which I posted the change on, I've picked up > until 10. I think that other SD_ASYM patch-set replaces 11 and 12, > right? > 11 is no longer needed, but AFAICT we still need 12 - we don't want PREFER_SIBLING to interfere with asymmetric systems. Also, I've been playing around with a patch to modify 5 (the nohz kicks) that first scans the capacity of nohz CPUs before doing any kick (pretty much like what asym packing is doing with nohz CPU priority), do you want me to toss it your way? I haven't done run any tests with it yet... Cheers, Valentin