| commit | 6b9de613ae9c79b637e070136585dde029578065 | |
| author | Mike Galbraith <efault@gmx.de> | |
| Mon, 2 Nov 2009 19:36:51 +0000 (2 20:36 +0100) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Tue, 3 Nov 2009 06:24:07 +0000 (3 07:24 +0100) | ||
| tree | ab567c71852bf5dec21ab97e7dc3db1594a0ac7f | treesnapshot (tar.gz zip) |
| parent | 49557e620339cb134127b5bfbcfecc06b77d0232 | commitdiff |
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>
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>
| arch/x86/include/asm/topology.h | diffblobblamehistory |