linux-kernel - [patch v5 07/15] sched: add new sg/sd_lb_stats fields for incoming fork/exec/wake balancing

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Date:	Mon, 18 Feb 2013 13:07:34 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	torvalds@...ux-foundation.org, mingo@...hat.com,
	peterz@...radead.org, tglx@...utronix.de,
	akpm@...ux-foundation.org, arjan@...ux.intel.com, bp@...en8.de,
	pjt@...gle.com, namhyung@...nel.org, efault@....de
Cc:	vincent.guittot@...aro.org, gregkh@...uxfoundation.org,
	preeti@...ux.vnet.ibm.com, viresh.kumar@...aro.org,
	linux-kernel@...r.kernel.org, alex.shi@...el.com,
	morten.rasmussen@....com
Subject: [patch v5 07/15] sched: add new sg/sd_lb_stats fields for incoming fork/exec/wake balancing

For power aware balancing, we care the sched domain/group's
utilizations more than their load weight. So add:
sd_lb_stats.sd_utils and sg_lb_stats.group_utils.

We want to know the sd capacity, so add:
sd_lb_stats.sd_capacity.

And want to know which group is busiest but still has free time to
handle more tasks, so add:
sd_lb_stats.group_leader.

Signed-off-by: Alex Shi <alex.shi@...el.com>
---
 kernel/sched/fair.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index b9a34ab..32b8a7b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4214,6 +4214,11 @@ struct sd_lb_stats {
 	unsigned int  busiest_group_weight;
 
 	int group_imb; /* Is there imbalance in this sd */
+
+	/* Varibles of power awaring scheduling */
+	unsigned int  sd_utils;	/* sum utilizations of this domain */
+	unsigned long sd_capacity;	/* capacity of this domain */
+	struct sched_group *group_leader; /* Group which relieves group_min */
 };
 
 /*
@@ -4229,6 +4234,7 @@ struct sg_lb_stats {
 	unsigned long group_weight;
 	int group_imb; /* Is there an imbalance in the group ? */
 	int group_has_capacity; /* Is there extra capacity in the group? */
+	unsigned int group_utils;	/* sum utilizations of group */
 };
 
 /**
-- 
1.7.12

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