Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752801Ab3EFBqc (ORCPT ); Sun, 5 May 2013 21:46:32 -0400 Received: from mga02.intel.com ([134.134.136.20]:64038 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752528Ab3EFBqa (ORCPT ); Sun, 5 May 2013 21:46:30 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,618,1363158000"; d="scan'208";a="308658667" From: Alex Shi To: mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, akpm@linux-foundation.org, bp@alien8.de, pjt@google.com, namhyung@kernel.org, efault@gmx.de, morten.rasmussen@arm.com Cc: vincent.guittot@linaro.org, preeti@linux.vnet.ibm.com, viresh.kumar@linaro.org, linux-kernel@vger.kernel.org, alex.shi@intel.com, mgorman@suse.de, riel@redhat.com, wangyun@linux.vnet.ibm.com Subject: [PATCH v5 6/7] sched: consider runnable load average in move_tasks Date: Mon, 6 May 2013 09:45:10 +0800 Message-Id: <1367804711-30308-7-git-send-email-alex.shi@intel.com> X-Mailer: git-send-email 1.7.12 In-Reply-To: <1367804711-30308-1-git-send-email-alex.shi@intel.com> References: <1367804711-30308-1-git-send-email-alex.shi@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1483 Lines: 43 Except using runnable load average in background, move_tasks is also the key functions in load balance. We need consider the runnable load average in it in order to the apple to apple load comparison. Signed-off-by: Alex Shi --- kernel/sched/fair.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 0bf88e8..790e23d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3966,6 +3966,12 @@ static unsigned long task_h_load(struct task_struct *p); static const unsigned int sched_nr_migrate_break = 32; +static unsigned long task_h_load_avg(struct task_struct *p) +{ + return div_u64(task_h_load(p) * (u64)p->se.avg.runnable_avg_sum, + p->se.avg.runnable_avg_period + 1); +} + /* * move_tasks tries to move up to imbalance weighted load from busiest to * this_rq, as part of a balancing operation within domain "sd". @@ -4001,7 +4007,7 @@ static int move_tasks(struct lb_env *env) if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) goto next; - load = task_h_load(p); + load = task_h_load_avg(p); if (sched_feat(LB_MIN) && load < 16 && !env->sd->nr_balance_failed) goto next; -- 1.7.12 -- 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/