Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755923Ab3FRJpe (ORCPT ); Tue, 18 Jun 2013 05:45:34 -0400 Received: from mga09.intel.com ([134.134.136.24]:46067 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753919Ab3FRJpb (ORCPT ); Tue, 18 Jun 2013 05:45:31 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,888,1363158000"; d="scan'208";a="331407770" Message-ID: <51C02C03.8090501@intel.com> Date: Tue, 18 Jun 2013 17:44:35 +0800 From: Alex Shi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 MIME-Version: 1.0 To: Paul Turner CC: Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Andrew Morton , Borislav Petkov , Namhyung Kim , Mike Galbraith , Morten Rasmussen , Vincent Guittot , Preeti U Murthy , Viresh Kumar , LKML , Mel Gorman , Rik van Riel , Michael Wang , Jason Low , Changlong Xie , sgruszka@redhat.com, =?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?= Subject: Re: [patch v8 6/9] sched: compute runnable load avg in cpu_load and cpu_avg_load_per_task References: <1370589652-24549-1-git-send-email-alex.shi@intel.com> <1370589652-24549-7-git-send-email-alex.shi@intel.com> <51BF15C4.1090906@intel.com> <51BFD787.5020708@intel.com> In-Reply-To: <51BFD787.5020708@intel.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2969 Lines: 100 > > Paul, could I summary your point here: > keep current weighted_cpu_load, but add blocked load avg in > get_rq_runnable_load? > > I will test this change. Current testing(kbuild, oltp, aim7) don't show clear different on my NHM EP box between the following and the origin patch, the only different is get_rq_runnable_load added blocked_load_avg. in SMP will test more cases and more box. --- kernel/sched/fair.c | 5 +++-- kernel/sched/proc.c | 17 +++++++++++++++-- 2 files changed, 18 insertions(+), 4 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 1e5a5e6..7d5c477 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2968,7 +2968,7 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags) /* Used instead of source_load when we know the type == 0 */ static unsigned long weighted_cpuload(const int cpu) { - return cpu_rq(cpu)->load.weight; + return cpu_rq(cpu)->cfs.runnable_load_avg; } /* @@ -3013,9 +3013,10 @@ static unsigned long cpu_avg_load_per_task(int cpu) { struct rq *rq = cpu_rq(cpu); unsigned long nr_running = ACCESS_ONCE(rq->nr_running); + unsigned long load_avg = rq->cfs.runnable_load_avg; if (nr_running) - return rq->load.weight / nr_running; + return load_avg / nr_running; return 0; } diff --git a/kernel/sched/proc.c b/kernel/sched/proc.c index bb3a6a0..36d7db6 100644 --- a/kernel/sched/proc.c +++ b/kernel/sched/proc.c @@ -501,6 +501,18 @@ static void __update_cpu_load(struct rq *this_rq, unsigned long this_load, sched_avg_update(this_rq); } +#ifdef CONFIG_SMP +unsigned long get_rq_runnable_load(struct rq *rq) +{ + return rq->cfs.runnable_load_avg + rq->cfs.blocked_load_avg; +} +#else +unsigned long get_rq_runnable_load(struct rq *rq) +{ + return rq->load.weight; +} +#endif + #ifdef CONFIG_NO_HZ_COMMON /* * There is no sane way to deal with nohz on smp when using jiffies because the @@ -522,7 +534,7 @@ static void __update_cpu_load(struct rq *this_rq, unsigned long this_load, void update_idle_cpu_load(struct rq *this_rq) { unsigned long curr_jiffies = ACCESS_ONCE(jiffies); - unsigned long load = this_rq->load.weight; + unsigned long load = get_rq_runnable_load(this_rq); unsigned long pending_updates; /* @@ -568,11 +580,12 @@ void update_cpu_load_nohz(void) */ void update_cpu_load_active(struct rq *this_rq) { + unsigned long load = get_rq_runnable_load(this_rq); /* * See the mess around update_idle_cpu_load() / update_cpu_load_nohz(). */ this_rq->last_load_update_tick = jiffies; - __update_cpu_load(this_rq, this_rq->load.weight, 1); + __update_cpu_load(this_rq, load, 1); calc_load_account_active(this_rq); } -- 1.7.12 -- Thanks Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/