From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756973Ab3EGFSL (ORCPT ); Tue, 7 May 2013 01:18:11 -0400 Received: from mga03.intel.com ([143.182.124.21]:15663 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752590Ab3EGFSJ (ORCPT ); Tue, 7 May 2013 01:18:09 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,625,1363158000"; d="scan'208";a="237860892" Message-ID: <51888E87.2090506@intel.com> Date: Tue, 07 May 2013 13:17:59 +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: Peter Zijlstra , Ingo Molnar , 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 Subject: Re: [PATCH v5 6/7] sched: consider runnable load average in move_tasks References: <1367804711-30308-1-git-send-email-alex.shi@intel.com> <1367804711-30308-7-git-send-email-alex.shi@intel.com> <20130506150428.GD15446@dyad.programming.kicks-ass.net> In-Reply-To: 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 On 05/07/2013 04:59 AM, Paul Turner wrote: >>> Similarly, I think you also want to at least include blocked_load_avg here. >> > >> > I'm puzzled, this is an entity weight. Entity's don't have blocked_load_avg. >> > >> > The purpose here is to compute the amount of weight that's being moved by this >> > task; to subtract from the imbalance. > Sorry, what I meant to say here is: > If we're going to be using a runnable average based load here the > fraction we take (currently instantaneous) in tg_load_down should be > consistent. yes. I think so. So, here is the patch, could you like take a look? --- >>From 8a98af9578154ce5d755b2c6ea7da0109cd6efa8 Mon Sep 17 00:00:00 2001 From: Alex Shi Date: Mon, 3 Dec 2012 23:00:53 +0800 Subject: [PATCH 6/7] sched: consider runnable load average in move_tasks 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 | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 407ef61..ca0e051 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4121,11 +4121,12 @@ static int tg_load_down(struct task_group *tg, void *data) long cpu = (long)data; if (!tg->parent) { - load = cpu_rq(cpu)->load.weight; + load = cpu_rq(cpu)->avg.load_avg_contrib; } else { load = tg->parent->cfs_rq[cpu]->h_load; - load *= tg->se[cpu]->load.weight; - load /= tg->parent->cfs_rq[cpu]->load.weight + 1; + load *= tg->se[cpu]->avg.load_avg_contrib; + load /= tg->parent->cfs_rq[cpu]->runnable_load_avg + + tg->parent->cfs_rq[cpu]->blocked_load_avg + 1; } tg->cfs_rq[cpu]->h_load = load; @@ -4153,8 +4154,9 @@ static unsigned long task_h_load(struct task_struct *p) struct cfs_rq *cfs_rq = task_cfs_rq(p); unsigned long load; - load = p->se.load.weight; - load = div_u64(load * cfs_rq->h_load, cfs_rq->load.weight + 1); + load = p->se.avg.load_avg_contrib; + load = div_u64(load * cfs_rq->h_load, + cfs_rq->runnable_load_avg + cfs_rq->blocked_load_avg + 1); return load; } -- 1.7.12 -- Thanks Alex