src/share/vm/gc_implementation/shenandoah/shenandoahControlThread.hpp

rev 10548 : [backport] Forceful SATB buffer flushes should be time-periodic, not traffic-dependent
rev 10552 : [backport] Concurrent uncommit should be recorded as GC event

*** 43,52 ****
--- 43,59 ----
    ShenandoahPeriodicTask(ShenandoahControlThread* thread) :
            PeriodicTask(100), _thread(thread) {}
    virtual void task();
  };
  
+ // Periodic task to flush SATB buffers periodically.
+ class ShenandoahPeriodicSATBFlushTask : public PeriodicTask {
+ public:
+   ShenandoahPeriodicSATBFlushTask() : PeriodicTask(ShenandoahSATBBufferFlushInterval) {}
+   virtual void task();
+ };
+ 
  class ShenandoahControlThread: public ConcurrentGCThread {
    friend class VMStructs;
  
  private:
    typedef enum {
*** 60,69 ****
--- 67,77 ----
    // explicit GC waiters when alloc failure GC cycle finishes. We want instead
    // to make complete explicit cycle for for demanding customers.
    Monitor _alloc_failure_waiters_lock;
    Monitor _explicit_gc_waiters_lock;
    ShenandoahPeriodicTask _periodic_task;
+   ShenandoahPeriodicSATBFlushTask _periodic_satb_flush_task;
  
   private:
    static SurrogateLockerThread* _slt;
  
  public:
*** 83,92 ****
--- 91,101 ----
  
    bool check_cancellation_or_degen(ShenandoahHeap::ShenandoahDegenPoint point);
    void service_concurrent_normal_cycle(GCCause::Cause cause);
    void service_stw_full_cycle(GCCause::Cause cause);
    void service_stw_degenerated_cycle(GCCause::Cause cause, ShenandoahHeap::ShenandoahDegenPoint point);
+   void service_uncommit(double shrink_before);
  
    bool try_set_alloc_failure_gc();
    void notify_alloc_failure_waiters();
    bool is_alloc_failure_gc();