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| author | Mike Galbraith <efault@gmx.de> | 2009-11-02 20:36:51 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-03 07:24:07 +0100 |
| commit | 6b9de613ae9c79b637e070136585dde029578065 (patch) | |
| tree | ab567c71852bf5dec21ab97e7dc3db1594a0ac7f | |
| parent | 49557e620339cb134127b5bfbcfecc06b77d0232 (diff) | |
| download | blackbird-op-linux-6b9de613ae9c79b637e070136585dde029578065.tar.gz blackbird-op-linux-6b9de613ae9c79b637e070136585dde029578065.zip | |
sched: Disable SD_PREFER_LOCAL at node level
Yanmin Zhang reported that SD_PREFER_LOCAL induces an order of
magnitude increase in select_task_rq_fair() overhead while
running heavy wakeup benchmarks (tbench and vmark).
Since SD_BALANCE_WAKE is off at node level, turn SD_PREFER_LOCAL
off as well pending further investigation.
Reported-by: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/include/asm/topology.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index d823c245f63b..40e37b10c6c0 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -143,7 +143,7 @@ extern unsigned long node_remap_size[]; | 1*SD_BALANCE_FORK \ | 0*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ - | 1*SD_PREFER_LOCAL \ + | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_POWERSAVINGS_BALANCE \ | 0*SD_SHARE_PKG_RESOURCES \ |
