--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Wed Dec 09 09:51:31 2015 -0500
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Wed Dec 09 17:09:12 2015 +0000
@@ -3266,11 +3266,11 @@
 
   // Print the per-region information.
   st->cr();
-  st->print_cr("Heap Regions: (E=young(eden), S=young(survivor), O=old, "
+  st->print_cr("Heap Regions: E=young(eden), S=young(survivor), O=old, "
                "HS=humongous(starts), HC=humongous(continues), "
                "CS=collection set, F=free, A=archive, TS=gc time stamp, "
-               "PTAMS=previous top-at-mark-start, "
-               "NTAMS=next top-at-mark-start)");
+               "AC=allocation context, "
+               "TAMS=top-at-mark-start (previous, next)");
   PrintRegionClosure blk(st);
   heap_region_iterate(&blk);
 }

--- a/hotspot/src/share/vm/gc/g1/heapRegion.cpp	Wed Dec 09 09:51:31 2015 -0500
+++ b/hotspot/src/share/vm/gc/g1/heapRegion.cpp	Wed Dec 09 17:09:12 2015 +0000
@@ -592,17 +592,20 @@
 
 void HeapRegion::print() const { print_on(gclog_or_tty); }
 void HeapRegion::print_on(outputStream* st) const {
-  st->print("AC%4u", allocation_context());
-
-  st->print(" %2s", get_short_type_str());
-  if (in_collection_set())
-    st->print(" CS");
-  else
-    st->print("   ");
-  st->print(" TS %5d", _gc_time_stamp);
-  st->print(" PTAMS " PTR_FORMAT " NTAMS " PTR_FORMAT,
-            p2i(prev_top_at_mark_start()), p2i(next_top_at_mark_start()));
-  G1OffsetTableContigSpace::print_on(st);
+  st->print("|%4u", this->_hrm_index);
+  st->print("|" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT,
+            p2i(bottom()), p2i(top()), p2i(end()));
+  st->print("|%3d%%", (int) ((double) used() * 100 / capacity()));
+  st->print("|%2s", get_short_type_str());
+  if (in_collection_set()) {
+    st->print("|CS");
+  } else {
+    st->print("|  ");
+  }
+  st->print("|TS%3u", _gc_time_stamp);
+  st->print("|AC%3u", allocation_context());
+  st->print_cr("|TAMS " PTR_FORMAT ", " PTR_FORMAT "|",
+               p2i(prev_top_at_mark_start()), p2i(next_top_at_mark_start()));
 }
 
 class VerifyLiveClosure: public OopClosure {