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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 <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Peter Zijlstra 2009-09-16 13:24:49 +02:00 • committed by Ingo Molnar
commit 182a85f8a1
7 changed files with 4 additions and 10 deletions
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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_FORK \
| SD_BALANCE_NEWIDLE \
| SD_BALANCE_WAKE \
| SD_SERIALIZE, \
.last_balance = jiffies, \
.balance_interval = 1, \