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src/hotspot/share/gc/g1/g1OldGenAllocationTracker.cpp

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rev 60542 : [mq]: 8245511-rev.3

@@ -46,5 +46,18 @@
   _allocated_humongous_bytes_since_last_gc = 0;
   log_debug(gc, alloc, stats)("Old generation allocation in the last mutator period, "
                               "old gen allocated: " SIZE_FORMAT "B, humongous allocated: " SIZE_FORMAT "B.",
                               _last_period_old_bytes, _last_period_humongous_bytes);
 }
+
+size_t G1OldGenAllocationTracker::last_period_net_survived_old_bytes() const {
+  // The upper limit of the freed region count is the number of regions allocated
+  // since the last gc. When more humongous regions survived the current gc than
+  // survived the previous one, deduct the increment.
+  size_t freed_humongous_bytes = _last_period_humongous_bytes;
+
+  if (freed_humongous_bytes > 0 && _humongous_bytes_after_penultimate_gc < _humongous_bytes_after_last_gc) {
+    freed_humongous_bytes -= _humongous_bytes_after_last_gc - _humongous_bytes_after_penultimate_gc;
+  }
+  assert(_last_period_old_bytes >= freed_humongous_bytes, "Allocation rate cannot be negative");
+  return _last_period_old_bytes - freed_humongous_bytes;
+ }
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