src/hotspot/share/runtime/objectMonitor.cpp

rev 51780 : imported patch syncknobs-00-base
rev 51781 : imported patch syncknobs-01-Knob_ReportSettings
rev 51782 : imported patch syncknobs-02-Knob_SpinBackOff
rev 51783 : imported patch syncknobs-03-BackOffMask
rev 51784 : imported patch syncknobs-04-Knob_ExitRelease
rev 51785 : imported patch syncknobs-05-Knob_InlineNotify
rev 51786 : imported patch syncknobs-06-Knob_Verbose
rev 51787 : imported patch syncknobs-07-Knob_VerifyInUse
rev 51788 : imported patch syncknobs-08-Knob_VerifyMatch
rev 51789 : imported patch syncknobs-09-Knob_SpinBase
rev 51790 : imported patch syncknobs-10-Knob_CASPenalty
rev 51791 : imported patch syncknobs-11-Knob_OXPenalty
rev 51792 : imported patch syncknobs-12-Knob_SpinSetSucc
rev 51793 : imported patch syncknobs-13-Knob_SpinEarly
rev 51794 : imported patch syncknobs-14-Knob_SuccEnabled
rev 51795 : imported patch syncknobs-15-Knob_SuccRestrict
rev 51796 : imported patch syncknobs-16-Knob_MaxSpinners
rev 51797 : imported patch syncknobs-17-Knob_SpinAfterFutile
rev 51798 : imported patch syncknobs-18-Knob_OState

*** 106,116 ****
  static int Knob_Bonus               = 100;     // spin success bonus
  static int Knob_BonusB              = 100;     // spin success bonus
  static int Knob_Penalty             = 200;     // spin failure penalty
  static int Knob_Poverty             = 1000;
  static int Knob_FixedSpin           = 0;
- static int Knob_OState              = 3;       // Spinner checks thread state of _owner
  static int Knob_UsePause            = 1;
  static int Knob_ExitPolicy          = 0;
  static int Knob_PreSpin             = 10;      // 20-100 likely better
  static int Knob_ResetEvent          = 0;
  
--- 106,115 ----
*** 1829,1839 ****
    // hold the duration constant but vary the frequency.
  
    ctr = _SpinDuration;
    if (ctr <= 0) return 0;
  
!   if (Knob_OState && NotRunnable (Self, (Thread *) _owner)) {
      return 0;
    }
  
    // We're good to spin ... spin ingress.
    // CONSIDER: use Prefetch::write() to avoid RTS->RTO upgrades
--- 1828,1838 ----
    // hold the duration constant but vary the frequency.
  
    ctr = _SpinDuration;
    if (ctr <= 0) return 0;
  
!   if (NotRunnable(Self, (Thread *) _owner)) {
      return 0;
    }
  
    // We're good to spin ... spin ingress.
    // CONSIDER: use Prefetch::write() to avoid RTS->RTO upgrades
*** 1921,1931 ****
  
      // Abort the spin if the owner is not executing.
      // The owner must be executing in order to drop the lock.
      // Spinning while the owner is OFFPROC is idiocy.
      // Consider: ctr -= RunnablePenalty ;
!     if (Knob_OState && NotRunnable (Self, ox)) {
        goto Abort;
      }
      if (_succ == NULL) {
        _succ = Self;
      }
--- 1920,1930 ----
  
      // Abort the spin if the owner is not executing.
      // The owner must be executing in order to drop the lock.
      // Spinning while the owner is OFFPROC is idiocy.
      // Consider: ctr -= RunnablePenalty ;
!     if (NotRunnable(Self, ox)) {
        goto Abort;
      }
      if (_succ == NULL) {
        _succ = Self;
      }