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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-09-16 13:24:49 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-16 16:44:33 +0200 |
| commit | 182a85f8a119c789610a9d464f4129ded9f3c107 (patch) | |
| tree | ffc36e5049895bf85543ba8d0225805e15fe8d92 /include/linux/topology.h | |
| parent | 5a9b86f647a56862cdc0a1362bfb015ae921af7f (diff) | |
| download | lwn-182a85f8a119c789610a9d464f4129ded9f3c107.tar.gz lwn-182a85f8a119c789610a9d464f4129ded9f3c107.zip | |
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>
Diffstat (limited to 'include/linux/topology.h')
| -rw-r--r-- | include/linux/topology.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/topology.h b/include/linux/topology.h index a6614b0242a9..809b26c07090 100644 --- 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 \ |