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>
diff --git a/arch/ia64/include/asm/topology.h b/arch/ia64/include/asm/topology.h
index 569b9da..d0141fbf 100644
--- a/arch/ia64/include/asm/topology.h
+++ b/arch/ia64/include/asm/topology.h
@@ -68,7 +68,6 @@
| 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 @@
| 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
index d833239..2305917 100644
--- a/arch/mips/include/asm/mach-ip27/topology.h
+++ b/arch/mips/include/asm/mach-ip27/topology.h
@@ -48,7 +48,6 @@
.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
index 1a2c9eb..394edcb 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -63,7 +63,6 @@
| 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
index a8cc564..f8c40cc 100644
--- 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
index 10b979d..26cd25c 100644
--- a/arch/sparc/include/asm/topology_64.h
+++ b/arch/sparc/include/asm/topology_64.h
@@ -57,7 +57,6 @@
.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
index 589f123..6f0695d 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -141,7 +141,7 @@
| 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
index a6614b0..809b26c 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -95,7 +95,7 @@
| 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 @@
| 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 @@
| 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 \
