From patchwork Sun May 11 18:16:53 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yuyang Du X-Patchwork-Id: 4154921 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 [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 3105FBFF02 for ; Mon, 12 May 2014 02:22:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6B5582018A for ; Mon, 12 May 2014 02:22:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 800FD20179 for ; Mon, 12 May 2014 02:22:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758489AbaELCWw (ORCPT ); Sun, 11 May 2014 22:22:52 -0400 Received: from mga01.intel.com ([192.55.52.88]:8842 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758484AbaELCWv (ORCPT ); Sun, 11 May 2014 22:22:51 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 11 May 2014 19:22:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,1032,1389772800"; d="scan'208";a="530200701" Received: from dalvikqa005-desktop.bj.intel.com ([10.238.151.105]) by fmsmga001.fm.intel.com with ESMTP; 11 May 2014 19:22:12 -0700 From: Yuyang Du To: mingo@redhat.com, peterz@infradead.org, rafael.j.wysocki@intel.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: arjan.van.de.ven@intel.com, len.brown@intel.com, alan.cox@intel.com, mark.gross@intel.com, morten.rasmussen@arm.com, vincent.guittot@linaro.org, rajeev.d.muralidhar@intel.com, vishwesh.m.rudramuni@intel.com, nicole.chalhoub@intel.com, ajaya.durg@intel.com, harinarayanan.seshadri@intel.com, jacob.jun.pan@linux.intel.com, fengguang.wu@intel.com, yuyang.du@intel.com Subject: [RFC PATCH 04/12 v2] CPU ConCurrency tracking Date: Mon, 12 May 2014 02:16:53 +0800 Message-Id: <1399832221-8314-5-git-send-email-yuyang.du@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1399832221-8314-1-git-send-email-yuyang.du@intel.com> References: <1399832221-8314-1-git-send-email-yuyang.du@intel.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=-6.0 required=5.0 tests=BAYES_00, DATE_IN_PAST_06_12, RCVD_IN_DNSWL_HI, 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 CC can only be modified when enqueue and dequeue the CPU rq. And we also track it in scheduler tick and idle enter/exit in case we may not have enqueue and dequeue for a long time. Therefore, we track CC in and only in these four points: 1. dequeue 2. enqueue 3. scheduler tick 4. idle enter and exit TODO: use existing load tracking framework Signed-off-by: Yuyang Du --- kernel/sched/core.c | 3 +++ kernel/sched/fair.c | 2 ++ 2 files changed, 5 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 7958a47..0236455 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -767,6 +767,7 @@ static void enqueue_task(struct rq *rq, struct task_struct *p, int flags) update_rq_clock(rq); sched_info_queued(rq, p); p->sched_class->enqueue_task(rq, p, flags); + update_cpu_concurrency(rq); } static void dequeue_task(struct rq *rq, struct task_struct *p, int flags) @@ -774,6 +775,7 @@ static void dequeue_task(struct rq *rq, struct task_struct *p, int flags) update_rq_clock(rq); sched_info_dequeued(rq, p); p->sched_class->dequeue_task(rq, p, flags); + update_cpu_concurrency(rq); } void activate_task(struct rq *rq, struct task_struct *p, int flags) @@ -2428,6 +2430,7 @@ void scheduler_tick(void) update_rq_clock(rq); curr->sched_class->task_tick(rq, curr, 0); update_cpu_load_active(rq); + update_cpu_concurrency(rq); raw_spin_unlock(&rq->lock); perf_event_task_tick(); diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7570dd9..e7153ff 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2563,6 +2563,7 @@ static inline void dequeue_entity_load_avg(struct cfs_rq *cfs_rq, void idle_enter_fair(struct rq *this_rq) { update_rq_runnable_avg(this_rq, 1); + update_cpu_concurrency(this_rq); } /* @@ -2573,6 +2574,7 @@ void idle_enter_fair(struct rq *this_rq) void idle_exit_fair(struct rq *this_rq) { update_rq_runnable_avg(this_rq, 0); + update_cpu_concurrency(this_rq); } static int idle_balance(struct rq *this_rq);