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From: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>,
	Suresh B Siddha <suresh.b.siddha@intel.com>,
	Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>, Dipankar Sarma <dipankar@in.ibm.com>,
	Balbir Singh <balbir@linux.vnet.ibm.com>,
	Vatsa <vatsa@linux.vnet.ibm.com>,
	Gautham R Shenoy <ego@in.ibm.com>,
	Andi Kleen <andi@firstfloor.org>,
	Gregory Haskins <gregory.haskins@gmail.com>,
	Mike Galbraith <efault@gmx.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Arun Bharadwaj <arun@linux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Subject: [RFC PATCH v1 1/3] sched: add more levels of sched_mc
Date: Mon, 27 Apr 2009 02:16:44 +0530	[thread overview]
Message-ID: <20090426204644.17495.8214.stgit@drishya.in.ibm.com> (raw)
In-Reply-To: <20090426204029.17495.46609.stgit@drishya.in.ibm.com>

Add few more levels to sched_mc for cpu evacuation.
These levels will try to keep CPU cores free in order
to reduce power consumption.

sched_mc=3 to 5 enables cpu evacuation

** This is a RFC patch for discussion ***

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
---

 include/linux/sched.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index b4c38bc..8b27295 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -788,6 +788,10 @@ enum powersavings_balance_level {
 	POWERSAVINGS_BALANCE_WAKEUP,	/* Also bias task wakeups to semi-idle
 					 * cpu package for power savings
 					 */
+	POWERSAVINGS_INCREASE_GROUP_CAPACITY_1, /* 1*imbalalance_pct = 125% */
+	POWERSAVINGS_INCREASE_GROUP_CAPACITY_2, /* 2*imbalalance_pct = 150% */
+	POWERSAVINGS_INCREASE_GROUP_CAPACITY_3, /* 4*imbalalance_pct = 200% */
+
 	MAX_POWERSAVINGS_BALANCE_LEVELS
 };
 


  reply	other threads:[~2009-04-26 20:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-26 20:46 [RFC PATCH v1 0/3] Saving power by cpu evacuation using sched_mc=n Vaidyanathan Srinivasan
2009-04-26 20:46 ` Vaidyanathan Srinivasan [this message]
2009-04-26 20:46 ` [RFC PATCH v1 2/3] sched: threshold helper functions Vaidyanathan Srinivasan
2009-04-26 20:47 ` [RFC PATCH v1 3/3] sched: loadbalancer hacks for forced packing of tasks Vaidyanathan Srinivasan
2009-04-27  3:52 ` [RFC PATCH v1 0/3] Saving power by cpu evacuation using sched_mc=n Ingo Molnar
2009-04-27  5:43   ` Vaidyanathan Srinivasan
2009-04-27  5:53     ` Ingo Molnar
2009-04-27  6:39       ` Vaidyanathan Srinivasan
2009-04-27  7:01         ` Balbir Singh
2009-04-27  5:54   ` Dipankar Sarma
2009-04-27 10:09 ` Peter Zijlstra
2009-04-27 14:20   ` Vaidyanathan Srinivasan
2009-04-28  8:33     ` Peter Zijlstra
2009-04-28  8:52       ` Ingo Molnar
2009-04-28 16:15         ` Vaidyanathan Srinivasan
2009-04-28 16:11       ` Vaidyanathan Srinivasan

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