--- old/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2019-11-06 13:48:31.545572248 -0800
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2019-11-06 13:48:31.149572236 -0800
@@ -2391,6 +2391,15 @@
   st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions,
             (size_t) survivor_regions * HeapRegion::GrainBytes / K);
   st->cr();
+  if (_numa->is_enabled()) {
+    uint num_nodes = _numa->num_active_nodes();
+    st->print("  remaining free region(s) on each NUMA node: ");
+    const int* node_ids = _numa->node_ids();
+    for (uint node_index = 0; node_index < num_nodes; node_index++) {
+      st->print("%d=%u ", node_ids[node_index], _hrm->num_free_regions(node_index));
+    }
+    st->cr();
+  }
   MetaspaceUtils::print_on(st);
 }
 
@@ -2580,6 +2589,20 @@
   // We have just completed a GC. Update the soft reference
   // policy with the new heap occupancy
   Universe::update_heap_info_at_gc();
+
+  // Print NUMA statistics.
+  _numa->print_statistics();
+}
+
+void G1CollectedHeap::verify_numa_regions(const char* desc) {
+  LogTarget(Trace, gc, heap, verify) lt;
+
+  if (lt.is_enabled()) {
+    LogStream ls(lt);
+    // Iterate all heap regions to print matching between preferred numa id and actual numa id.
+    G1NodeIndexCheckClosure cl(desc, _numa, &ls);
+    heap_region_iterate(&cl);
+  } 
 }
 
 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size,
@@ -2889,6 +2912,7 @@
   }
   _verifier->verify_before_gc(type);
   _verifier->check_bitmaps("GC Start");
+  verify_numa_regions("GC Start");
 }
 
 void G1CollectedHeap::verify_after_young_collection(G1HeapVerifier::G1VerifyType type) {
@@ -2899,6 +2923,7 @@
   }
   _verifier->verify_after_gc(type);
   _verifier->check_bitmaps("GC End");
+  verify_numa_regions("GC End");
 }
 
 void G1CollectedHeap::expand_heap_after_young_collection(){