• Ingo Molnar's avatar
    sched: turn off WAKEUP_OVERLAP · f681bbd6
    Ingo Molnar authored
    WAKEUP_OVERLAP is not a winner on a 16way box, running psql+sysbench:
    
           .27-rc7-NO_WAKEUP_OVERLAP  .27-rc7-WAKEUP_OVERLAP
    -------------------------------------------------
        1:             694              811    +14.39%
        2:            1454             1427    -1.86%
        4:            3017             3070    +1.70%
        8:            5694             5808    +1.96%
       16:           10592            10612    +0.19%
       32:            9693             9647    -0.48%
       64:            8507             8262    -2.97%
      128:            8402             7087    -18.55%
      256:            8419             5124    -64.30%
      512:            7990             3671    -117.62%
    -------------------------------------------------
      SUM:           64466            55524    -16.11%
    
    ... so turn it off by default.
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    f681bbd6
sched_features.h 401 Bytes