Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752256AbdGGK7k (ORCPT ); Fri, 7 Jul 2017 06:59:40 -0400 Received: from foss.arm.com ([217.140.101.70]:46056 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751091AbdGGK7j (ORCPT ); Fri, 7 Jul 2017 06:59:39 -0400 Date: Fri, 7 Jul 2017 11:59:32 +0100 From: Juri Lelli To: Viresh Kumar Cc: peterz@infradead.org, mingo@redhat.com, rjw@rjwysocki.net, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, tglx@linutronix.de, vincent.guittot@linaro.org, rostedt@goodmis.org, luca.abeni@santannapisa.it, claudio@evidence.eu.com, tommaso.cucinotta@santannapisa.it, bristot@redhat.com, mathieu.poirier@linaro.org, tkjos@android.com, joelaf@google.com, andresoportus@google.com, morten.rasmussen@arm.com, dietmar.eggemann@arm.com, patrick.bellasi@arm.com, Ingo Molnar , "Rafael J . Wysocki" Subject: Re: [RFC PATCH v1 4/8] sched/cpufreq_schedutil: split utilization signals Message-ID: <20170707105932.bnslgcqjp4rwg273@e106622-lin> References: <20170705085905.6558-1-juri.lelli@arm.com> <20170705085905.6558-5-juri.lelli@arm.com> <20170707085848.GA32542@vireshk-i7> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170707085848.GA32542@vireshk-i7> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1784 Lines: 53 Hi, On 07/07/17 14:28, Viresh Kumar wrote: > On 05-07-17, 09:59, Juri Lelli wrote: > > To be able to treat utilization signals of different scheduling classes > > in different ways (e.g., CFS signal might be stale while DEADLINE signal > > is never stale by design) we need to split sugov_cpu::util signal in two: > > util_cfs and util_dl. > > > > This patch does that by also changing sugov_get_util() parameter list. > > After this change, aggregation of the different signals has to be performed > > by sugov_get_util() users (so that they can decide what to do with the > > different signals). > > > > Suggested-by: Rafael J. Wysocki > > Are you referring to this response here ? > > https://marc.info/?l=linux-kernel&m=149095102600847&w=2 > Yep. > If yes, then I don't think it was about having separate APIs, but just storing > util_cfs/dl separately. > > > -static void sugov_get_util(unsigned long *util, unsigned long *max) > > +static void sugov_get_util(struct sugov_cpu *sg_cpu) > > { > > struct rq *rq = this_rq(); > > - unsigned long dl_util = (rq->dl.running_bw * SCHED_CAPACITY_SCALE) > > - >> BW_SHIFT; > > > > - *max = arch_scale_cpu_capacity(NULL, smp_processor_id()); > > + sg_cpu->max = arch_scale_cpu_capacity(NULL, smp_processor_id()); > > + sg_cpu->util_cfs = rq->cfs.avg.util_avg; > > + sg_cpu->util_dl = (rq->dl.running_bw * SCHED_CAPACITY_SCALE) > > + >> BW_SHIFT; > > +} > > > > +static unsigned long sugov_aggregate_util(struct sugov_cpu *sg_cpu) > > As Joel already mentioned, I don't think we should create two separate routines > here. > Mmm, it makes retrieving of utilization in sugov_update_shared and aggregating values for the domain in sugov_next_freq_shared cleaner, IMHO. Thanks, - Juri