src/share/vm/gc/g1/g1CollectorPolicy.cpp

rev 9312 : imported patch 8136678-implement-adaptive-sizing-algorithm-for-IHOP

*** 1243,1254 ****
--- 1243,1271 ----
  
    _collectionSetChooser->verify();
  }
  
  G1IHOPControl* G1CollectorPolicy::create_ihop_control() const {
+   if (G1UseAdaptiveIHOP) {
+     // The target occupancy is the total heap occupancy we want to hit. First, we
+     // want to avoid eating into the reserve intended for young GC (to avoid unnecessary
+     // throughput loss). Additionally G1 is free to not clean out up to
+     // G1HeapWastePercent of heap, that space also cannot be used for allocation
+     // while marking.
+     size_t safe_heap_percentage = (size_t) (G1ReservePercent + G1HeapWastePercent);
+     size_t target_occupancy = 0;
+ 
+     if (safe_heap_percentage < 100) {
+       target_occupancy = G1CollectedHeap::heap()->max_capacity() * (100.0 - safe_heap_percentage) / 100.0;
+     }
+     return new G1AdaptiveIHOPControl(InitiatingHeapOccupancyPercent,
+                                      target_occupancy,
+                                      &_predictor);
+   } else {
      return new G1StaticIHOPControl(InitiatingHeapOccupancyPercent,
                                     G1CollectedHeap::heap()->max_capacity());
+   }
  }
  
  void G1CollectorPolicy::update_ihop_statistics(double marking_time,
                                                 double mutator_time_s,
                                                 size_t mutator_alloc_bytes,