8245026: PsAdaptiveSizePolicy::_old_gen_policy_is_ready is unused

Reviewed-by: sjohanss, pliden

Author: jaokim

src/hotspot/share/gc/parallel/psAdaptiveSizePolicy.cpp

@@ -60,7 +60,6 @@ PSAdaptiveSizePolicy::PSAdaptiveSizePolicy(size_t init_eden_size,
      _live_at_last_full_gc(init_promo_size),
      _change_old_gen_for_min_pauses(0),
      _change_young_gen_for_maj_pauses(0),
-     _old_gen_policy_is_ready(false),
      _young_gen_size_increment_supplement(YoungGenerationSizeSupplement),
      _old_gen_size_increment_supplement(TenuredGenerationSizeSupplement)
 {
@@ -164,12 +163,6 @@ void PSAdaptiveSizePolicy::major_collection_end(size_t amount_live,
   // Update the amount live at the end of a full GC
   _live_at_last_full_gc = amount_live;
 
-  // The policy does not have enough data until at least some major collections
-  // have been done.
-  if (_avg_major_pause->count() >= AdaptiveSizePolicyReadyThreshold) {
-    _old_gen_policy_is_ready = true;
-  }
-
   // Interval times use this timer to measure the interval that
   // the mutator runs.  Reset after the GC pause has been measured.
   _major_timer.reset();

src/hotspot/share/gc/parallel/psAdaptiveSizePolicy.hpp

@@ -106,10 +106,6 @@ class PSAdaptiveSizePolicy : public AdaptiveSizePolicy {
   // increase/decrease the young generation for major pause time
   int _change_young_gen_for_maj_pauses;
 
-
-  // Flag indicating that the adaptive policy is ready to use
-  bool _old_gen_policy_is_ready;
-
   // To facilitate faster growth at start up, supplement the normal
   // growth percentage for the young gen eden and the
   // old gen space for promotion with these value which decay
@@ -310,8 +306,6 @@ class PSAdaptiveSizePolicy : public AdaptiveSizePolicy {
   }
   float major_collection_slope() { return _major_collection_estimator->slope();}
 
-  bool old_gen_policy_is_ready() { return _old_gen_policy_is_ready; }
-
   // Given the amount of live data in the heap, should we
   // perform a Full GC?
   bool should_full_GC(size_t live_in_old_gen);