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=-2.1 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_MUTT 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 0EF61C6778D for ; Wed, 12 Sep 2018 17:34:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A0F920854 for ; Wed, 12 Sep 2018 17:34:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="O2BLh53s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A0F920854 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org 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 S1727780AbeILWkB (ORCPT ); Wed, 12 Sep 2018 18:40:01 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:34910 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727403AbeILWkB (ORCPT ); Wed, 12 Sep 2018 18:40:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=dX480bcLnCd6kp6XnnY5LIUs706onB0a8fVNc6iO7sA=; b=O2BLh53sHRI09HIrR5QgKsi2/ QClFRyXN4eDr38A7RVTuGO0eS/FgFPeiqDaZr140Jl0IsBpS62WilQFBkyftLCrOx5pZAX7sFSJY6 m1KNgS9kIu+JTVOhzfy9zJrZvZBCOEtyLpV3mBNb1t0ym+eR9YUTivR6dLctF5TQAou7x6AsAwPjp n7c2khgdZ6b3dnoEhPel8fg99TBEIodKWuLYVcl9oME5P/X8peP5GXO60KM0BYqAG0DOOcM2u9ICc ulEkvU1k+KgZL7DHuT8kW7afR0PkqCjxolgLjUarbDK/Hp+dnnnz82lu1/HFBWe0AFLBmKrWgWo2Y Yi/keeAZg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1g0920-00035l-70; Wed, 12 Sep 2018 17:34:24 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id DA4D9202C1A2E; Wed, 12 Sep 2018 19:34:21 +0200 (CEST) Date: Wed, 12 Sep 2018 19:34:21 +0200 From: Peter Zijlstra To: Patrick Bellasi Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Ingo Molnar , Tejun Heo , "Rafael J . Wysocki" , Viresh Kumar , Vincent Guittot , Paul Turner , Quentin Perret , Dietmar Eggemann , Morten Rasmussen , Juri Lelli , Todd Kjos , Joel Fernandes , Steve Muckle , Suren Baghdasaryan Subject: Re: [PATCH v4 03/16] sched/core: uclamp: add CPU's clamp groups accounting Message-ID: <20180912173421.GX24082@hirez.programming.kicks-ass.net> References: <20180828135324.21976-1-patrick.bellasi@arm.com> <20180828135324.21976-4-patrick.bellasi@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180828135324.21976-4-patrick.bellasi@arm.com> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 28, 2018 at 02:53:11PM +0100, Patrick Bellasi wrote: > diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h > index 72df2dc779bc..513608ae4908 100644 > --- a/kernel/sched/sched.h > +++ b/kernel/sched/sched.h > @@ -764,6 +764,50 @@ extern void rto_push_irq_work_func(struct irq_work *work); > #endif > #endif /* CONFIG_SMP */ > > +#ifdef CONFIG_UCLAMP_TASK > +/** > + * struct uclamp_group - Utilization clamp Group > + * @value: utilization clamp value for tasks on this clamp group > + * @tasks: number of RUNNABLE tasks on this clamp group > + * > + * Keep track of how many tasks are RUNNABLE for a given utilization > + * clamp value. > + */ > +struct uclamp_group { > + int value; > + int tasks; > +}; We could use bit fields again to compress in 10:22 bits I suppose. 4M tasks is quite a lot to have runnable on a single CPU ;-)