--- old/src/hotspot/share/gc/g1/g1ConcurrentRefineThread.cpp	2019-08-23 19:41:55.947424279 -0400
+++ new/src/hotspot/share/gc/g1/g1ConcurrentRefineThread.cpp	2019-08-23 19:41:55.731412666 -0400
@@ -104,7 +104,7 @@
     size_t buffers_processed = 0;
     log_debug(gc, refine)("Activated worker %d, on threshold: " SIZE_FORMAT ", current: " SIZE_FORMAT,
                           _worker_id, _cr->activation_threshold(_worker_id),
-                           G1BarrierSet::dirty_card_queue_set().num_completed_buffers());
+                          G1BarrierSet::dirty_card_queue_set().num_cards());
 
     {
       SuspendibleThreadSetJoiner sts_join;
@@ -124,9 +124,10 @@
 
     deactivate();
     log_debug(gc, refine)("Deactivated worker %d, off threshold: " SIZE_FORMAT
-                          ", current: " SIZE_FORMAT ", processed: " SIZE_FORMAT,
+                          ", current: " SIZE_FORMAT ", buffers processed: "
+                          SIZE_FORMAT,
                           _worker_id, _cr->deactivation_threshold(_worker_id),
-                          G1BarrierSet::dirty_card_queue_set().num_completed_buffers(),
+                          G1BarrierSet::dirty_card_queue_set().num_cards(),
                           buffers_processed);
 
     if (os::supports_vtime()) {