src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp

rev 59422 : 8245754: Shenandoah: ditch ShenandoahAlwaysPreTouch
Reviewed-by: XXX

*** 153,163 ****
    size_t max_byte_size  = MaxHeapSize;
    size_t heap_alignment = HeapAlignment;
  
    size_t reg_size_bytes = ShenandoahHeapRegion::region_size_bytes();
  
!   if (ShenandoahAlwaysPreTouch) {
      // Enabled pre-touch means the entire heap is committed right away.
      init_byte_size = max_byte_size;
    }
  
    Universe::check_alignment(max_byte_size,  reg_size_bytes, "Shenandoah heap");
--- 153,163 ----
    size_t max_byte_size  = MaxHeapSize;
    size_t heap_alignment = HeapAlignment;
  
    size_t reg_size_bytes = ShenandoahHeapRegion::region_size_bytes();
  
!   if (AlwaysPreTouch) {
      // Enabled pre-touch means the entire heap is committed right away.
      init_byte_size = max_byte_size;
    }
  
    Universe::check_alignment(max_byte_size,  reg_size_bytes, "Shenandoah heap");
*** 342,354 ****
      _marking_context->mark_complete();
  
      _free_set->rebuild();
    }
  
!   if (ShenandoahAlwaysPreTouch) {
!     assert(!AlwaysPreTouch, "Should have been overridden");
! 
      // For NUMA, it is important to pre-touch the storage under bitmaps with worker threads,
      // before initialize() below zeroes it with initializing thread. For any given region,
      // we touch the region and the corresponding bitmaps from the same thread.
      ShenandoahPushWorkerScope scope(workers(), _max_workers, false);
  
--- 342,352 ----
      _marking_context->mark_complete();
  
      _free_set->rebuild();
    }
  
!   if (AlwaysPreTouch) {
      // For NUMA, it is important to pre-touch the storage under bitmaps with worker threads,
      // before initialize() below zeroes it with initializing thread. For any given region,
      // we touch the region and the corresponding bitmaps from the same thread.
      ShenandoahPushWorkerScope scope(workers(), _max_workers, false);