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sched: Disable wakeup balancing

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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>
This commit is contained in:
Peter Zijlstra 2009-09-16 13:24:49 +02:00 committed by Ingo Molnar
parent 5a9b86f647
commit 182a85f8a1
7 changed files with 4 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/ia64/include/asm/topology.h
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@ -68,7 +68,6 @@ void build_cpu_to_node_map(void);
| SD_BALANCE_NEWIDLE \ | SD_BALANCE_NEWIDLE \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_BALANCE_FORK \ | SD_BALANCE_FORK \
| SD_BALANCE_WAKE \
| SD_WAKE_AFFINE, \ | SD_WAKE_AFFINE, \
.last_balance = jiffies, \ .last_balance = jiffies, \
.balance_interval = 1, \ .balance_interval = 1, \
@ -94,7 +93,6 @@ void build_cpu_to_node_map(void);
| SD_BALANCE_NEWIDLE \ | SD_BALANCE_NEWIDLE \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_BALANCE_FORK \ | SD_BALANCE_FORK \
| SD_BALANCE_WAKE \
| SD_SERIALIZE, \ | SD_SERIALIZE, \
.last_balance = jiffies, \ .last_balance = jiffies, \
.balance_interval = 64, \ .balance_interval = 64, \

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

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

1
arch/sh/include/asm/topology.h
View File

@ -21,7 +21,6 @@
.flags = SD_LOAD_BALANCE \ .flags = SD_LOAD_BALANCE \
| SD_BALANCE_FORK \ | SD_BALANCE_FORK \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_BALANCE_WAKE \
| SD_BALANCE_NEWIDLE \ | SD_BALANCE_NEWIDLE \
| SD_SERIALIZE, \ | SD_SERIALIZE, \
.last_balance = jiffies, \ .last_balance = jiffies, \

1
arch/sparc/include/asm/topology_64.h
View File

@ -57,7 +57,6 @@ static inline int pcibus_to_node(struct pci_bus *pbus)
.flags = SD_LOAD_BALANCE \ .flags = SD_LOAD_BALANCE \
| SD_BALANCE_FORK \ | SD_BALANCE_FORK \
| SD_BALANCE_EXEC \ | SD_BALANCE_EXEC \
| SD_BALANCE_WAKE \
| SD_SERIALIZE, \ | SD_SERIALIZE, \
.last_balance = jiffies, \ .last_balance = jiffies, \
.balance_interval = 1, \ .balance_interval = 1, \

2
arch/x86/include/asm/topology.h
View File

@ -141,7 +141,7 @@ extern unsigned long node_remap_size[];
| 1*SD_BALANCE_NEWIDLE \ | 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \ | 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \ | 1*SD_BALANCE_FORK \
| 1*SD_BALANCE_WAKE \ | 0*SD_BALANCE_WAKE \
| 1*SD_WAKE_AFFINE \ | 1*SD_WAKE_AFFINE \
| 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_CPUPOWER \
| 0*SD_POWERSAVINGS_BALANCE \ | 0*SD_POWERSAVINGS_BALANCE \

6
include/linux/topology.h
View File

@ -95,7 +95,7 @@ int arch_update_cpu_topology(void);
| 1*SD_BALANCE_NEWIDLE \ | 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \ | 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \ | 1*SD_BALANCE_FORK \
| 1*SD_BALANCE_WAKE \ | 0*SD_BALANCE_WAKE \
| 1*SD_WAKE_AFFINE \ | 1*SD_WAKE_AFFINE \
| 1*SD_SHARE_CPUPOWER \ | 1*SD_SHARE_CPUPOWER \
| 0*SD_POWERSAVINGS_BALANCE \ | 0*SD_POWERSAVINGS_BALANCE \
@ -127,7 +127,7 @@ int arch_update_cpu_topology(void);
| 1*SD_BALANCE_NEWIDLE \ | 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \ | 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \ | 1*SD_BALANCE_FORK \
| 1*SD_BALANCE_WAKE \ | 0*SD_BALANCE_WAKE \
| 1*SD_WAKE_AFFINE \ | 1*SD_WAKE_AFFINE \
| 1*SD_PREFER_LOCAL \ | 1*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_CPUPOWER \
@ -160,7 +160,7 @@ int arch_update_cpu_topology(void);
| 1*SD_BALANCE_NEWIDLE \ | 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \ | 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \ | 1*SD_BALANCE_FORK \
| 1*SD_BALANCE_WAKE \ | 0*SD_BALANCE_WAKE \
| 1*SD_WAKE_AFFINE \ | 1*SD_WAKE_AFFINE \
| 1*SD_PREFER_LOCAL \ | 1*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_CPUPOWER \