src/share/vm/memory/defNewGeneration.cpp

@@ -1002,10 +1002,13 @@
   // We try to allocate from the eden.  If that works, we are happy.
   // Note that since DefNewGeneration supports lock-free allocation, we
   // have to use it here, as well.
   HeapWord* result = eden()->par_allocate(word_size);
   if (result != NULL) {
+    if (CMSEdenChunksRecordAlways && _next_gen != NULL) {
+      _next_gen->sample_eden_chunk();
+    }
     return result;
   }
   do {
     HeapWord* old_limit = eden()->soft_end();
     if (old_limit < eden()->end()) {

@@ -1032,17 +1035,23 @@
   // out of heap space, and we try to allocate the from-space, too.
   // allocate_from_space can't be inlined because that would introduce a
   // circular dependency at compile time.
   if (result == NULL) {
     result = allocate_from_space(word_size);
+  } else if (CMSEdenChunksRecordAlways && _next_gen != NULL) {
+    _next_gen->sample_eden_chunk();
   }
   return result;
 }
 
 HeapWord* DefNewGeneration::par_allocate(size_t word_size,
                                          bool is_tlab) {
-  return eden()->par_allocate(word_size);
+  HeapWord* res = eden()->par_allocate(word_size);
+  if (CMSEdenChunksRecordAlways && _next_gen != NULL) {
+    _next_gen->sample_eden_chunk();
+  }
+  return res;
 }
 
 void DefNewGeneration::gc_prologue(bool full) {
   // Ensure that _end and _soft_end are the same in eden space.
   eden()->set_soft_end(eden()->end());