linux-kernel - [RFC PATCH 07/16 v3] Init Workload Consolidation flags in sched

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Date:	Fri, 30 May 2014 14:36:03 +0800
From:	Yuyang Du <yuyang.du@...el.com>
To:	mingo@...hat.com, peterz@...radead.org, rafael.j.wysocki@...el.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Cc:	arjan.van.de.ven@...el.com, len.brown@...el.com,
	alan.cox@...el.com, mark.gross@...el.com, pjt@...gle.com,
	bsegall@...gle.com, morten.rasmussen@....com,
	vincent.guittot@...aro.org, rajeev.d.muralidhar@...el.com,
	vishwesh.m.rudramuni@...el.com, nicole.chalhoub@...el.com,
	ajaya.durg@...el.com, harinarayanan.seshadri@...el.com,
	jacob.jun.pan@...ux.intel.com, fengguang.wu@...el.com,
	yuyang.du@...el.com
Subject: [RFC PATCH 07/16 v3] Init Workload Consolidation flags in sched_domain

Workload Consolidation can be enabled/disabled on the fly. This patchset
enables MC and CPU domain WC by default.

To enable CPU WC (SD_WORKLOAD_CONSOLIDATION=0x8000):

sysctl -w kernel.sched_domain.cpuX.domainY.flags += 0x8000

To disable CPU WC:

sysctl -w kernel.sched_domain.cpuX.domainY.flags -= 0x8000

Signed-off-by: Yuyang Du <yuyang.du@...el.com>
---
 include/linux/topology.h |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/topology.h b/include/linux/topology.h
index 7062330..ebc339c3 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -102,12 +102,14 @@ int arch_update_cpu_topology(void);
 				| 0*SD_SERIALIZE			\
 				| 0*SD_PREFER_SIBLING			\
 				| arch_sd_sibling_asym_packing()	\
+				| 0*SD_WORKLOAD_CONSOLIDATION	\
 				,					\
 	.last_balance		= jiffies,				\
 	.balance_interval	= 1,					\
 	.smt_gain		= 1178,	/* 15% */			\
 	.max_newidle_lb_cost	= 0,					\
 	.next_decay_max_lb_cost	= jiffies,				\
+	.consolidating_coeff = 0,					\
 }
 #endif
 #endif /* CONFIG_SCHED_SMT */
@@ -134,11 +136,13 @@ int arch_update_cpu_topology(void);
 				| 0*SD_SHARE_CPUPOWER			\
 				| 1*SD_SHARE_PKG_RESOURCES		\
 				| 0*SD_SERIALIZE			\
+				| 1*SD_WORKLOAD_CONSOLIDATION	\
 				,					\
 	.last_balance		= jiffies,				\
 	.balance_interval	= 1,					\
 	.max_newidle_lb_cost	= 0,					\
 	.next_decay_max_lb_cost	= jiffies,				\
+	.consolidating_coeff = 180,					\
 }
 #endif
 #endif /* CONFIG_SCHED_MC */
@@ -167,11 +171,13 @@ int arch_update_cpu_topology(void);
 				| 0*SD_SHARE_PKG_RESOURCES		\
 				| 0*SD_SERIALIZE			\
 				| 1*SD_PREFER_SIBLING			\
+				| 1*SD_WORKLOAD_CONSOLIDATION	\
 				,					\
 	.last_balance		= jiffies,				\
 	.balance_interval	= 1,					\
 	.max_newidle_lb_cost	= 0,					\
 	.next_decay_max_lb_cost	= jiffies,				\
+	.consolidating_coeff = 180,					\
 }
 #endif
 
-- 
1.7.9.5

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