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Commit 182a85f8 authored Sep 16, 2009 by Peter Zijlstra Committed by Ingo Molnar Sep 16, 2009

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>

parent 5a9b86f6

arch/ia64/include/asm/topology.h

+0 −2

Original line number	Diff line number	Diff line
		@@ -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, \

arch/mips/include/asm/mach-ip27/topology.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -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, \

arch/powerpc/include/asm/topology.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -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, \

arch/sh/include/asm/topology.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -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, \

arch/sparc/include/asm/topology_64.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -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, \