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author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-06-27 13:41:12 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-06-27 14:31:28 +0200 |
commit | c9c294a630e28eec5f2865f028ecfc58d45c0a5a (patch) | |
tree | 62fcfc395e98ff7a4ff6bee3364d0bb86024b171 /drivers/infiniband/ulp/ipoib/ipoib_cm.c | |
parent | a7be37ac8e1565e00880531f4e2aff421a21c803 (diff) |
sched: fix calc_delta_asym()
calc_delta_asym() is supposed to do the same as calc_delta_fair() except
linearly shrink the result for negative nice processes - this causes them
to have a smaller preemption threshold so that they are more easily preempted.
The problem is that for task groups se->load.weight is the per cpu share of
the actual task group weight; take that into account.
Also provide a debug switch to disable the asymmetry (which I still don't
like - but it does greatly benefit some workloads)
This would explain the interactivity issues reported against group scheduling.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_cm.c')
0 files changed, 0 insertions, 0 deletions