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sched: Add SD_PREFER_LOCAL

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And turn it on for NUMA and MC domains. This improves
locality in balancing decisions by keeping up to
capacity amount of tasks local before looking for idle
CPUs. (and twice the capacity if SD_POWERSAVINGS_BALANCE
is set.)

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 08:28:30 +02:00 • committed by Ingo Molnar
commit 59abf02644
3 changed files with 8 additions and 3 deletions
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2
include/linux/topology.h
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@ -129,6 +129,7 @@ int arch_update_cpu_topology(void);
| 1*SD_BALANCE_FORK \
| 1*SD_BALANCE_WAKE \
| 1*SD_WAKE_AFFINE \
| 1*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \
| 1*SD_SHARE_PKG_RESOURCES \
| 0*SD_SERIALIZE \
@ -161,6 +162,7 @@ int arch_update_cpu_topology(void);
| 1*SD_BALANCE_FORK \
| 1*SD_BALANCE_WAKE \
| 1*SD_WAKE_AFFINE \
| 1*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \
| 0*SD_SHARE_PKG_RESOURCES \
| 0*SD_SERIALIZE \