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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 473EFC10F13 for ; Thu, 11 Apr 2019 13:46:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2198E2133D for ; Thu, 11 Apr 2019 13:46:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726536AbfDKNqu (ORCPT ); Thu, 11 Apr 2019 09:46:50 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:43514 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726391AbfDKNqu (ORCPT ); Thu, 11 Apr 2019 09:46:50 -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 D0F5680D; Thu, 11 Apr 2019 06:46:49 -0700 (PDT) Received: from [0.0.0.0] (e107985-lin.cambridge.arm.com [10.1.194.38]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 34A9C3F68F; Thu, 11 Apr 2019 06:46:49 -0700 (PDT) Subject: Re: [RFC 2/6] Provide cgroup interface for manual jitter classification To: Parth Shah , linux-pm@vger.kernel.org References: <20190322060621.27021-1-parth015@linux.vnet.ibm.com> <20190322060621.27021-3-parth015@linux.vnet.ibm.com> From: Dietmar Eggemann Message-ID: <462cf628-1b0b-4f8c-251d-c0cff6af18fd@arm.com> Date: Thu, 11 Apr 2019 15:46:47 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190322060621.27021-3-parth015@linux.vnet.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On 3/22/19 7:06 AM, Parth Shah wrote: > Signed-off-by: Parth Shah > --- > include/linux/sched.h | 8 ++++++++ > kernel/sched/core.c | 46 +++++++++++++++++++++++++++++++++++++++++++ > kernel/sched/fair.c | 15 +++++++++----- > kernel/sched/sched.h | 2 ++ > 4 files changed, 66 insertions(+), 5 deletions(-) > > diff --git a/include/linux/sched.h b/include/linux/sched.h > index 903ef29b62c3..be8e8617e0cb 100644 > --- a/include/linux/sched.h > +++ b/include/linux/sched.h > @@ -604,6 +604,14 @@ struct task_struct { > unsigned int flags; > unsigned int ptrace; > > + /* > + * task_characteristics: > + * 0 = unknown. Follows regular CFS policy for task placement. > + * 1 = Throughput intensive high utilization task > + * 2 = Jitter tasks. Should be packed to reduce active core count. This is very similar to the ideas in [PATCH v8 00/16] Add utilization clamping support https://lore.kernel.org/lkml/20190402104153.25404-1-patrick.bellasi@arm.com . Task classification from userspace ... [...]