linux-kernel - [RFC PATCH 01/12 v2] CONFIG for CPU ConCurrency

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Date:	Mon, 12 May 2014 02:16:50 +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, 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 01/12 v2] CONFIG for CPU ConCurrency

Add CONFIG_CPU_CONCURRENCY in arch/x86/Kconfig. This CONFIG enables/disables
CPU ConCurrency load metric tracking.

Signed-off-by: Yuyang Du <yuyang.du@...el.com>
---
 arch/x86/Kconfig |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 25d2c6f..9bfac8d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -797,6 +797,17 @@ config SCHED_MC
 	  making when dealing with multi-core CPU chips at a cost of slightly
 	  increased overhead in some places. If unsure say N here.
 
+config CPU_CONCURRENCY
+	bool "CPU ConCurency (CC)"
+	default n
+	depends on SMP
+	---help---
+	  CPU ConCurrency (CC) is a new CPU load metric that measures the CPU
+	  load by averaging the number of running tasks. Using CC, the scheduler
+	  can evaluate the load of CPUs and may consolidate workloads on CPUs in
+	  load balancing for power efficiency without sacrificing performance.
+	  If unsure say N here.
+
 source "kernel/Kconfig.preempt"
 
 config X86_UP_APIC
-- 
1.7.9.5

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