8330960: Serial: Remove SerialFullGC::_total_invocations

Reviewed-by: ayang, tschatzl

src/hotspot/share/gc/serial/serialFullGC.cpp

@@ -74,8 +74,6 @@
 #include "jvmci/jvmci.hpp"
 #endif
 
-uint                    SerialFullGC::_total_invocations = 0;
-
 Stack<oop, mtGC>              SerialFullGC::_marking_stack;
 Stack<ObjArrayTask, mtGC>     SerialFullGC::_objarray_stack;
 
@@ -113,7 +111,7 @@ class DeadSpacer : StackObj {
       // we don't start compacting before there is a significant gain to be made.
       // Occasionally, we want to ensure a full compaction, which is determined
       // by the MarkSweepAlwaysCompactCount parameter.
-      if ((SerialFullGC::total_invocations() % MarkSweepAlwaysCompactCount) != 0) {
+      if ((SerialHeap::heap()->total_full_collections() % MarkSweepAlwaysCompactCount) != 0) {
         _allowed_deadspace_words = (space->capacity() * ratio / 100) / HeapWordSize;
       } else {
         _active = false;
@@ -694,9 +692,6 @@ void SerialFullGC::invoke_at_safepoint(bool clear_all_softrefs) {
 
   gch->trace_heap_before_gc(_gc_tracer);
 
-  // Increment the invocation count
-  _total_invocations++;
-
   // Capture used regions for old-gen to reestablish old-to-young invariant
   // after full-gc.
   gch->old_gen()->save_used_region();

src/hotspot/share/gc/serial/serialFullGC.hpp

@@ -81,9 +81,6 @@ class SerialFullGC : AllStatic {
   };
 
  protected:
-  // Total invocations of serial full GC
-  static uint _total_invocations;
-
   // Traversal stacks used during phase1
   static Stack<oop, mtGC>                      _marking_stack;
   static Stack<ObjArrayTask, mtGC>             _objarray_stack;
@@ -119,9 +116,6 @@ class SerialFullGC : AllStatic {
 
   static void invoke_at_safepoint(bool clear_all_softrefs);
 
-  // Accessors
-  static uint total_invocations() { return _total_invocations; }
-
   // Reference Processing
   static ReferenceProcessor* ref_processor() { return _ref_processor; }