• Peter Zijlstra's avatar
    sched: Disable wakeup balancing · 182a85f8
    Peter Zijlstra authored
    Sysbench thinks SD_BALANCE_WAKE is too agressive and kbuild doesn't
    really mind too much, SD_BALANCE_NEWIDLE picks up most of the
    slack.
    
    On a dual socket, quad core, dual thread nehalem system:
    
    sysbench (--num_threads=16):
    
     SD_BALANCE_WAKE-: 13982 tx/s
     SD_BALANCE_WAKE+: 15688 tx/s
    
    kbuild (-j16):
    
     SD_BALANCE_WAKE-: 47.648295846  seconds time elapsed   ( +-   0.312% )
     SD_BALANCE_WAKE+: 47.608607360  seconds time elapsed   ( +-   0.026% )
    
    (same within noise)
    Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
    LKML-Reference: <new-submission>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    182a85f8
topology.h 3.2 KB