8293622: Cleanup use of G1ConcRefinementThreads

Reviewed-by: ayang, iwalulya

Author: LizBing

src/hotspot/share/gc/g1/g1ConcurrentRefine.cpp

@@ -175,7 +175,7 @@ G1ConcurrentRefine::G1ConcurrentRefine(G1Policy* policy) :
 {}
 
 jint G1ConcurrentRefine::initialize() {
-  return _thread_control.initialize(this, max_num_threads());
+  return _thread_control.initialize(this, G1ConcRefinementThreads);
 }
 
 G1ConcurrentRefine* G1ConcurrentRefine::create(G1Policy* policy, jint* ecode) {
@@ -199,10 +199,6 @@ void G1ConcurrentRefine::threads_do(ThreadClosure *tc) {
   _thread_control.worker_threads_do(tc);
 }
 
-uint G1ConcurrentRefine::max_num_threads() {
-  return G1ConcRefinementThreads;
-}
-
 void G1ConcurrentRefine::update_pending_cards_target(double logged_cards_time_ms,
                                                      size_t processed_logged_cards,
                                                      size_t predicted_thread_buffer_cards,

src/hotspot/share/gc/g1/g1ConcurrentRefine.hpp

@@ -215,9 +215,6 @@ class G1ConcurrentRefine : public CHeapObj<mtGC> {
 
   // Iterate over all concurrent refinement threads applying the given closure.
   void threads_do(ThreadClosure *tc);
-
-  // Maximum number of refinement threads.
-  static uint max_num_threads();
 };
 
 #endif // SHARE_GC_G1_G1CONCURRENTREFINE_HPP

src/hotspot/share/gc/g1/g1FromCardCache.cpp

@@ -81,7 +81,7 @@ void G1FromCardCache::print(outputStream* out) {
 #endif
 
 uint G1FromCardCache::num_par_rem_sets() {
-  return G1DirtyCardQueueSet::num_par_ids() + G1ConcurrentRefine::max_num_threads() + MAX2(ConcGCThreads, ParallelGCThreads);
+  return G1DirtyCardQueueSet::num_par_ids() + G1ConcRefinementThreads + MAX2(ConcGCThreads, ParallelGCThreads);
 }
 
 void G1FromCardCache::clear(uint region_idx) {

src/hotspot/share/gc/g1/g1RemSetSummary.cpp

@@ -67,7 +67,7 @@ double G1RemSetSummary::rs_thread_vtime(uint thread) const {
 }
 
 G1RemSetSummary::G1RemSetSummary(bool should_update) :
-  _num_vtimes(G1ConcurrentRefine::max_num_threads()),
+  _num_vtimes(G1ConcRefinementThreads),
   _rs_threads_vtimes(NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC)) {
 
   memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes);