| commit | d942fb6c7d391baba3dddb566eb735fbf3df8528 | |
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | |
| Mon, 26 Jan 2009 16:56:17 +0000 (26 17:56 +0100) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Sun, 1 Feb 2009 09:49:06 +0000 (1 10:49 +0100) | ||
| tree | 0340b810c79f873b7aea34298aa22e2ebf740df3 | treesnapshot (tar.gz zip) |
| parent | f90d4118bacef87894621a3e8aba853fa0c89abc | commitdiff |
sched: fix sync wakeups
Pawel Dziekonski reported that the openssl benchmark and his
quantum chemistry application both show slowdowns due to the
scheduler under-parallelizing execution.
The reason are pipe wakeups still doing 'sync' wakeups which
overrides the normal buddy wakeup logic - even if waker and
wakee are loosely coupled.
Fix an inversion of logic in the buddy wakeup code.
Reported-by: Pawel Dziekonski <dzieko@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Pawel Dziekonski reported that the openssl benchmark and his
quantum chemistry application both show slowdowns due to the
scheduler under-parallelizing execution.
The reason are pipe wakeups still doing 'sync' wakeups which
overrides the normal buddy wakeup logic - even if waker and
wakee are loosely coupled.
Fix an inversion of logic in the buddy wakeup code.
Reported-by: Pawel Dziekonski <dzieko@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| kernel/sched.c | diffblobblamehistory | |
| kernel/sched_fair.c | diffblobblamehistory |