src/hotspot/share/gc/g1/g1ParScanThreadState.inline.hpp

rev 49826 : imported patch 6672778-partial-queue-trimming
rev 49827 : imported patch 6672778-refactoring
rev 49828 : imported patch 6672778-stefanj-review
rev 49829 : imported patch 6672778-inconsistent-time-fixes

*** 27,36 ****
--- 27,37 ----
  
  #include "gc/g1/g1ParScanThreadState.hpp"
  #include "gc/g1/g1RemSet.hpp"
  #include "oops/access.inline.hpp"
  #include "oops/oop.inline.hpp"
+ #include "utilities/ticks.inline.hpp"
  
  template <class T> void G1ParScanThreadState::do_oop_evac(T* p) {
    // Reference should not be NULL here as such are never pushed to the task queue.
    oop obj = RawAccess<OOP_NOT_NULL>::oop_load(p);
  
*** 149,154 ****
--- 150,197 ----
      // we drain the queues as necessary.
      trim_queue();
    }
  }
  
+ inline bool G1ParScanThreadState::needs_partial_trimming() const {
+   return !_refs->overflow_empty() || _refs->size() > _stack_trim_upper_threshold;
+ }
+ 
+ inline bool G1ParScanThreadState::is_partially_trimmed() const {
+   return _refs->overflow_empty() && _refs->size() <= _stack_trim_lower_threshold;
+ }
+ 
+ inline void G1ParScanThreadState::trim_queue_to_threshold(uint threshold) {
+   StarTask ref;
+   // Drain the overflow stack first, so other threads can potentially steal.
+   while (_refs->pop_overflow(ref)) {
+     if (!_refs->try_push_to_taskqueue(ref)) {
+       dispatch_reference(ref);
+     }
+   }
+ 
+   while (_refs->pop_local(ref, threshold)) {
+     dispatch_reference(ref);
+   }
+ }
+ 
+ inline void G1ParScanThreadState::trim_queue_partially() {
+   if (!needs_partial_trimming()) {
+     return;
+   }
+ 
+   const Ticks start = Ticks::now();
+   do {
+     trim_queue_to_threshold(_stack_trim_lower_threshold);
+   } while (!is_partially_trimmed());
+   _trim_ticks += Ticks::now() - start;
+ }
+ 
+ inline Tickspan G1ParScanThreadState::trim_ticks() {
+   return _trim_ticks;
+ }
+ 
+ inline void G1ParScanThreadState::reset_trim_ticks() {
+   _trim_ticks = Tickspan();
+ }
+ 
  #endif // SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_INLINE_HPP