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| author | Mike Galbraith | 2009-11-02 20:36:51 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2009-11-03 07:24:07 +0100 |
| commit | 6b9de613ae9c79b637e070136585dde029578065 (patch) | |
| tree | ab567c71852bf5dec21ab97e7dc3db1594a0ac7f /kernel/sched.c | |
| parent | sched: Fix boot crash by zalloc()ing most of the cpu masks (diff) | |
| download | kernel-qcow2-linux-6b9de613ae9c79b637e070136585dde029578065.tar.gz kernel-qcow2-linux-6b9de613ae9c79b637e070136585dde029578065.tar.xz kernel-qcow2-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>
Diffstat (limited to 'kernel/sched.c')
0 files changed, 0 insertions, 0 deletions