# HG changeset patch
# Parent 85a04e78cccca5fa40dbff6fb84b22157d40c151
# User tschatzl

diff -r 85a04e78cccc src/share/vm/gc/shared/taskqueue.cpp
--- a/src/share/vm/gc/shared/taskqueue.cpp	Tue Mar 22 14:41:24 2016 +0100
+++ b/src/share/vm/gc/shared/taskqueue.cpp	Tue Mar 22 14:45:07 2016 +0100
@@ -40,7 +40,7 @@
 
 #if TASKQUEUE_STATS
 const char * const TaskQueueStats::_names[last_stat_id] = {
-  "qpush", "qpop", "qpop-s", "qattempt", "qsteal", "opush", "omax"
+  "qpush", "qpop", "qpop-s", "qattempt", "qsteal", "opush", "omax", "snotfull", "sempty"
 };
 
 TaskQueueStats & TaskQueueStats::operator +=(const TaskQueueStats & addend)
diff -r 85a04e78cccc src/share/vm/gc/shared/taskqueue.hpp
--- a/src/share/vm/gc/shared/taskqueue.hpp	Tue Mar 22 14:41:24 2016 +0100
+++ b/src/share/vm/gc/shared/taskqueue.hpp	Tue Mar 22 14:45:07 2016 +0100
@@ -55,6 +55,8 @@
     steal,            // number of taskqueue steals
     overflow,         // number of overflow pushes
     overflow_max_len, // max length of overflow stack
+    overflow_pop_shared_notfull,
+    overflow_pop_shared_empty,
     last_stat_id
   };
 
@@ -66,6 +68,8 @@
   inline void record_pop_slow() { record_pop(); ++_stats[pop_slow]; }
   inline void record_steal(bool success);
   inline void record_overflow(size_t new_length);
+  inline void record_shared_empty() { ++_stats[overflow_pop_shared_empty]; }
+  inline void record_shared_notfull() { ++_stats[overflow_pop_shared_notfull]; }
 
   TaskQueueStats & operator +=(const TaskQueueStats & addend);
 
diff -r 85a04e78cccc src/share/vm/gc/shared/taskqueue.inline.hpp
--- a/src/share/vm/gc/shared/taskqueue.inline.hpp	Tue Mar 22 14:41:24 2016 +0100
+++ b/src/share/vm/gc/shared/taskqueue.inline.hpp	Tue Mar 22 14:45:07 2016 +0100
@@ -184,6 +184,13 @@
 {
   if (overflow_empty()) return false;
   t = overflow_stack()->pop();
+  size_t size = taskqueue_t::size();
+  if (size == 0) {
+    taskqueue_t::stats.record_shared_empty();
+  }
+  if (size != taskqueue_t::max_elems()) {
+    taskqueue_t::stats.record_shared_notfull();;
+  }
   return true;
 }