---

yaml --- r: 125382 b: refs/heads/master c: 100fdae h: refs/heads/master v: v3
git-mirror · Dec 19, 2008 · 95f9d8e · 95f9d8e
1 parent ad9f8a4
commit 95f9d8e
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Showing 3 changed files with 18 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ad273b32e482cdef306eac32b28d97f513a022f4
+refs/heads/master: 100fdaee70ebf5f31b9451fbc01300c627091328
diff --git a/trunk/include/linux/sched.h b/trunk/include/linux/sched.h
@@ -792,6 +792,19 @@ static inline int sd_balance_for_package_power(void)
 	return 0;
 }
 
+/*
+ * Optimise SD flags for power savings:
+ * SD_BALANCE_NEWIDLE helps agressive task consolidation and power savings.
+ * Keep default SD flags if sched_{smt,mc}_power_saving=0
+ */
+
+static inline int sd_power_saving_flags(void)
+{
+	if (sched_mc_power_savings | sched_smt_power_savings)
+		return SD_BALANCE_NEWIDLE;
+
+	return 0;
+}
 
 struct sched_group {
 	struct sched_group *next;	/* Must be a circular list */

diff --git a/trunk/include/linux/topology.h b/trunk/include/linux/topology.h
@@ -125,7 +125,8 @@ int arch_update_cpu_topology(void);
 				| SD_WAKE_AFFINE	\
 				| SD_WAKE_BALANCE	\
 				| SD_SHARE_PKG_RESOURCES\
-				| sd_balance_for_mc_power(),\
+				| sd_balance_for_mc_power()\
+				| sd_power_saving_flags(),\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 1,			\
 }
@@ -150,7 +151,8 @@ int arch_update_cpu_topology(void);
 				| SD_BALANCE_FORK	\
 				| SD_WAKE_AFFINE	\
 				| SD_WAKE_BALANCE	\
-				| sd_balance_for_package_power(),\
+				| sd_balance_for_package_power()\
+				| sd_power_saving_flags(),\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 1,			\
 }