src/hotspot/share/gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.cpp

rev 55538 : 8226757: Shenandoah: Make Traversal a separate mode

*** 33,54 ****
  
  ShenandoahAdaptiveHeuristics::ShenandoahAdaptiveHeuristics() :
    ShenandoahHeuristics(),
    _cycle_gap_history(new TruncatedSeq(5)),
    _conc_mark_duration_history(new TruncatedSeq(5)),
!   _conc_uprefs_duration_history(new TruncatedSeq(5)) {
! 
!   SHENANDOAH_ERGO_ENABLE_FLAG(ExplicitGCInvokesConcurrent);
!   SHENANDOAH_ERGO_ENABLE_FLAG(ShenandoahImplicitGCInvokesConcurrent);
! 
!   // Final configuration checks
!   SHENANDOAH_CHECK_FLAG_SET(ShenandoahLoadRefBarrier);
!   SHENANDOAH_CHECK_FLAG_SET(ShenandoahSATBBarrier);
!   SHENANDOAH_CHECK_FLAG_SET(ShenandoahKeepAliveBarrier);
!   SHENANDOAH_CHECK_FLAG_SET(ShenandoahCASBarrier);
!   SHENANDOAH_CHECK_FLAG_SET(ShenandoahCloneBarrier);
! }
  
  ShenandoahAdaptiveHeuristics::~ShenandoahAdaptiveHeuristics() {}
  
  void ShenandoahAdaptiveHeuristics::choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset,
                                                                           RegionData* data, size_t size,
--- 33,43 ----
  
  ShenandoahAdaptiveHeuristics::ShenandoahAdaptiveHeuristics() :
    ShenandoahHeuristics(),
    _cycle_gap_history(new TruncatedSeq(5)),
    _conc_mark_duration_history(new TruncatedSeq(5)),
!   _conc_uprefs_duration_history(new TruncatedSeq(5)) {}
  
  ShenandoahAdaptiveHeuristics::~ShenandoahAdaptiveHeuristics() {}
  
  void ShenandoahAdaptiveHeuristics::choose_collection_set_from_regiondata(ShenandoahCollectionSet* cset,
                                                                           RegionData* data, size_t size,
*** 119,129 ****
    } else if (phase == ShenandoahPhaseTimings::conc_update_refs) {
      _conc_uprefs_duration_history->add(secs);
    } // Else ignore
  }
  
! bool ShenandoahAdaptiveHeuristics::should_start_normal_gc() const {
    ShenandoahHeap* heap = ShenandoahHeap::heap();
    size_t capacity = heap->max_capacity();
    size_t available = heap->free_set()->available();
  
    // Check if we are falling below the worst limit, time to trigger the GC, regardless of
--- 108,118 ----
    } else if (phase == ShenandoahPhaseTimings::conc_update_refs) {
      _conc_uprefs_duration_history->add(secs);
    } // Else ignore
  }
  
! bool ShenandoahAdaptiveHeuristics::should_start_gc() const {
    ShenandoahHeap* heap = ShenandoahHeap::heap();
    size_t capacity = heap->max_capacity();
    size_t available = heap->free_set()->available();
  
    // Check if we are falling below the worst limit, time to trigger the GC, regardless of
*** 170,180 ****
      log_info(gc, ergo)("Free headroom: " SIZE_FORMAT "M (free) - " SIZE_FORMAT "M (spike) - " SIZE_FORMAT "M (penalties) = " SIZE_FORMAT "M",
                         available / M, spike_headroom / M, penalties / M, allocation_headroom / M);
      return true;
    }
  
!   return ShenandoahHeuristics::should_start_normal_gc();
  }
  
  bool ShenandoahAdaptiveHeuristics::should_start_update_refs() {
    if (! _update_refs_adaptive) {
      return _update_refs_early;
--- 159,169 ----
      log_info(gc, ergo)("Free headroom: " SIZE_FORMAT "M (free) - " SIZE_FORMAT "M (spike) - " SIZE_FORMAT "M (penalties) = " SIZE_FORMAT "M",
                         available / M, spike_headroom / M, penalties / M, allocation_headroom / M);
      return true;
    }
  
!   return ShenandoahHeuristics::should_start_gc();
  }
  
  bool ShenandoahAdaptiveHeuristics::should_start_update_refs() {
    if (! _update_refs_adaptive) {
      return _update_refs_early;