From patchwork Tue May 12 19:39:01 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Morten Rasmussen X-Patchwork-Id: 6390781 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id EE707BEEE1 for ; Tue, 12 May 2015 19:41:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 252DE203AB for ; Tue, 12 May 2015 19:41:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 33E9D202D1 for ; Tue, 12 May 2015 19:41:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933992AbbELTi4 (ORCPT ); Tue, 12 May 2015 15:38:56 -0400 Received: from foss.arm.com ([217.140.101.70]:33986 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933956AbbELTix (ORCPT ); Tue, 12 May 2015 15:38:53 -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 75BB82A; Tue, 12 May 2015 12:38:16 -0700 (PDT) Received: from e105550-lin.cambridge.arm.com (e105550-lin.cambridge.arm.com [10.2.131.193]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1D0623F218; Tue, 12 May 2015 12:38:50 -0700 (PDT) From: Morten Rasmussen To: peterz@infradead.org, mingo@redhat.com Cc: vincent.guittot@linaro.org, Dietmar Eggemann , yuyang.du@intel.com, preeti@linux.vnet.ibm.com, mturquette@linaro.org, rjw@rjwysocki.net, Juri Lelli , sgurrappadi@nvidia.com, pang.xunlei@zte.com.cn, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, morten.rasmussen@arm.com Subject: [RFCv4 PATCH 26/34] sched: Store system-wide maximum cpu capacity in root domain Date: Tue, 12 May 2015 20:39:01 +0100 Message-Id: <1431459549-18343-27-git-send-email-morten.rasmussen@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431459549-18343-1-git-send-email-morten.rasmussen@arm.com> References: <1431459549-18343-1-git-send-email-morten.rasmussen@arm.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dietmar Eggemann To be able to compare the capacity of the target cpu with the highest cpu capacity of the system in the wakeup path, store the system-wide maximum cpu capacity in the root domain. cc: Ingo Molnar cc: Peter Zijlstra Signed-off-by: Dietmar Eggemann --- kernel/sched/core.c | 8 ++++++++ kernel/sched/sched.h | 3 +++ 2 files changed, 11 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 8818bf0..d307db8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6848,6 +6848,7 @@ static int build_sched_domains(const struct cpumask *cpu_map, enum s_alloc alloc_state; struct sched_domain *sd; struct s_data d; + struct rq *rq; int i, ret = -ENOMEM; alloc_state = __visit_domain_allocation_hell(&d, cpu_map); @@ -6901,11 +6902,18 @@ static int build_sched_domains(const struct cpumask *cpu_map, /* Attach the domains */ rcu_read_lock(); for_each_cpu(i, cpu_map) { + rq = cpu_rq(i); sd = *per_cpu_ptr(d.sd, i); cpu_attach_domain(sd, d.rd, i); + + if (rq->cpu_capacity_orig > rq->rd->max_cpu_capacity) + rq->rd->max_cpu_capacity = rq->cpu_capacity_orig; } rcu_read_unlock(); + rq = cpu_rq(cpumask_first(cpu_map)); + pr_info("Max cpu capacity: %lu\n", rq->rd->max_cpu_capacity); + ret = 0; error: __free_domain_allocs(&d, alloc_state, cpu_map); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index a5d2d69..95c8ff7 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -553,6 +553,9 @@ struct root_domain { */ cpumask_var_t rto_mask; struct cpupri cpupri; + + /* Maximum cpu capacity in the system. */ + unsigned long max_cpu_capacity; }; extern struct root_domain def_root_domain;