linux-kernel - [patch v7 06/21] sched: add new sg/sd_lb_stats fields for incoming fork/exec/wake balancing

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Date:	Thu,  4 Apr 2013 10:00:47 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	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,
	morten.rasmussen@....com
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,
	len.brown@...el.com, rafael.j.wysocki@...el.com, jkosina@...e.cz,
	clark.williams@...il.com, tony.luck@...el.com,
	keescook@...omium.org, mgorman@...e.de, riel@...hat.com
Subject: [patch v7 06/21] 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 utilization.
So add: sd_lb_stats.sd_util and sg_lb_stats.group_util.

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

Signed-off-by: Alex Shi <alex.shi@...el.com>
---
 kernel/sched/fair.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 7124244..6b7917b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4203,6 +4203,10 @@ 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_util;	/* sum utilization of this domain */
+	struct sched_group *group_leader; /* Group which relieves group_min */
 };
 
 /*
@@ -4218,6 +4222,7 @@ 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_util;	/* sum utilization of group */
 };
 
 /**
-- 
1.7.12

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