src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp

rev 5920 : 8035406: Improve data structure for Code Cache remembered sets
Summary: Change the code cache remembered sets data structure from a GrowableArray to a chunked list of nmethods. This makes the data structure more amenable to parallelization, and decreases freeing time.
Reviewed-by:
rev 5921 : 8027295: Free CSet takes ~50% of young pause time
Summary: Improve fast card cache iteration and avoid taking locks when freeing the collection set.
Reviewed-by:
rev 5922 : 8035398: Add card redirty time in "Other" time in G1
Summary: Show the time taken by card redirtying during GC in a new "Redirty Cards" line.
Reviewed-by:
rev 5923 : 8035654: Add times for evacuation failure handling in "Other" time
Summary: Detailed breakdown of time spent in the evacuation failure handling phases to make the "Other" time roughly correspond to the sum of its parts.
Reviewed-by:

@@ -2359,12 +2359,16 @@
   }
   size_t result() { return _used; }
 };
 
 size_t G1CollectedHeap::recalculate_used() const {
+  double recalculate_used_start = os::elapsedTime();
+
   SumUsedClosure blk;
   heap_region_iterate(&blk);
+
+  g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0);
   return blk.result();
 }
 
 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) {
   switch (cause) {

@@ -4376,10 +4380,12 @@
 }
 
 void G1CollectedHeap::remove_self_forwarding_pointers() {
   assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity");
 
+  double remove_self_forwards_start = os::elapsedTime();
+
   G1ParRemoveSelfForwardPtrsTask rsfp_task(this);
 
   if (G1CollectedHeap::use_parallel_gc_threads()) {
     set_par_threads();
     workers()->run_task(&rsfp_task);

@@ -4403,10 +4409,12 @@
     markOop m = _preserved_marks_of_objs.pop();
     obj->set_mark(m);
   }
   _objs_with_preserved_marks.clear(true);
   _preserved_marks_of_objs.clear(true);
+
+  g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0);
 }
 
 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) {
   _evac_failure_scan_stack->push(obj);
 }