sched: Disable wakeup balancing

Sysbench thinks SD_BALANCE_WAKE is too agressive and kbuild doesn't really mind too much, SD_BALANCE_NEWIDLE picks up most of the slack. On a dual socket, quad core, dual thread nehalem system: sysbench (--num_threads=16): SD_BALANCE_WAKE-: 13982 tx/s SD_BALANCE_WAKE+: 15688 tx/s kbuild (-j16): SD_BALANCE_WAKE-: 47.648295846 seconds time elapsed ( +- 0.312% ) SD_BALANCE_WAKE+: 47.608607360 seconds time elapsed ( +- 0.026% ) (same within noise) Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
mariux64 · Sep 16, 2009 · 182a85f · 182a85f
1 parent 5a9b86f
commit 182a85f
Show file tree

Hide file tree

Showing 7 changed files with 4 additions and 10 deletions.
diff --git a/arch/ia64/include/asm/topology.h b/arch/ia64/include/asm/topology.h
@@ -68,7 +68,6 @@ void build_cpu_to_node_map(void);
 				| SD_BALANCE_NEWIDLE	\
 				| SD_BALANCE_EXEC	\
 				| SD_BALANCE_FORK	\
-				| SD_BALANCE_WAKE	\
 				| SD_WAKE_AFFINE,	\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 1,			\
@@ -94,7 +93,6 @@ void build_cpu_to_node_map(void);
 				| SD_BALANCE_NEWIDLE	\
 				| SD_BALANCE_EXEC	\
 				| SD_BALANCE_FORK	\
-				| SD_BALANCE_WAKE	\
 				| SD_SERIALIZE,		\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 64,			\

diff --git a/arch/mips/include/asm/mach-ip27/topology.h b/arch/mips/include/asm/mach-ip27/topology.h
@@ -48,7 +48,6 @@ extern unsigned char __node_distances[MAX_COMPACT_NODES][MAX_COMPACT_NODES];
 	.cache_nice_tries	= 1,			\
 	.flags			= SD_LOAD_BALANCE	\
 				| SD_BALANCE_EXEC	\
-				| SD_BALANCE_WAKE,	\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 1,			\
 	.nr_balance_failed	= 0,			\

diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
@@ -63,7 +63,6 @@ static inline int pcibus_to_node(struct pci_bus *bus)
 				| SD_BALANCE_EXEC	\
 				| SD_BALANCE_FORK	\
 				| SD_BALANCE_NEWIDLE	\
-				| SD_BALANCE_WAKE	\
 				| SD_SERIALIZE,		\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 1,			\

diff --git a/arch/sh/include/asm/topology.h b/arch/sh/include/asm/topology.h
@@ -21,7 +21,6 @@
 	.flags			= SD_LOAD_BALANCE	\
 				| SD_BALANCE_FORK	\
 				| SD_BALANCE_EXEC	\
-				| SD_BALANCE_WAKE	\
 				| SD_BALANCE_NEWIDLE	\
 				| SD_SERIALIZE,		\
 	.last_balance		= jiffies,		\

diff --git a/arch/sparc/include/asm/topology_64.h b/arch/sparc/include/asm/topology_64.h
@@ -57,7 +57,6 @@ static inline int pcibus_to_node(struct pci_bus *pbus)
 	.flags			= SD_LOAD_BALANCE	\
 				| SD_BALANCE_FORK	\
 				| SD_BALANCE_EXEC	\
-				| SD_BALANCE_WAKE	\
 				| SD_SERIALIZE,		\
 	.last_balance		= jiffies,		\
 	.balance_interval	= 1,			\

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
@@ -141,7 +141,7 @@ extern unsigned long node_remap_size[];
 				| 1*SD_BALANCE_NEWIDLE			\
 				| 1*SD_BALANCE_EXEC			\
 				| 1*SD_BALANCE_FORK			\
-				| 1*SD_BALANCE_WAKE			\
+				| 0*SD_BALANCE_WAKE			\
 				| 1*SD_WAKE_AFFINE			\
 				| 0*SD_SHARE_CPUPOWER			\
 				| 0*SD_POWERSAVINGS_BALANCE		\

diff --git a/include/linux/topology.h b/include/linux/topology.h
@@ -95,7 +95,7 @@ int arch_update_cpu_topology(void);
 				| 1*SD_BALANCE_NEWIDLE			\
 				| 1*SD_BALANCE_EXEC			\
 				| 1*SD_BALANCE_FORK			\
-				| 1*SD_BALANCE_WAKE			\
+				| 0*SD_BALANCE_WAKE			\
 				| 1*SD_WAKE_AFFINE			\
 				| 1*SD_SHARE_CPUPOWER			\
 				| 0*SD_POWERSAVINGS_BALANCE		\
@@ -127,7 +127,7 @@ int arch_update_cpu_topology(void);
 				| 1*SD_BALANCE_NEWIDLE			\
 				| 1*SD_BALANCE_EXEC			\
 				| 1*SD_BALANCE_FORK			\
-				| 1*SD_BALANCE_WAKE			\
+				| 0*SD_BALANCE_WAKE			\
 				| 1*SD_WAKE_AFFINE			\
 				| 1*SD_PREFER_LOCAL			\
 				| 0*SD_SHARE_CPUPOWER			\
@@ -160,7 +160,7 @@ int arch_update_cpu_topology(void);
 				| 1*SD_BALANCE_NEWIDLE			\
 				| 1*SD_BALANCE_EXEC			\
 				| 1*SD_BALANCE_FORK			\
-				| 1*SD_BALANCE_WAKE			\
+				| 0*SD_BALANCE_WAKE			\
 				| 1*SD_WAKE_AFFINE			\
 				| 1*SD_PREFER_LOCAL			\
 				| 0*SD_SHARE_CPUPOWER			\