--- old/src/hotspot/share/gc/g1/g1IHOPControl.cpp	2020-02-11 11:34:46.230142512 +0100
+++ new/src/hotspot/share/gc/g1/g1IHOPControl.cpp	2020-02-11 11:34:45.822129969 +0100
@@ -39,8 +39,8 @@
 }
 
 void G1IHOPControl::update_target_occupancy(size_t new_target_occupancy) {
-  log_debug(gc, ihop)("Target occupancy update: old: " SIZE_FORMAT "B, new: " SIZE_FORMAT "B",
-                      _target_occupancy, new_target_occupancy);
+  log_debug(gc, ihop)("Target occupancy update: old: " SIZE_FORMAT "B, new: " SIZE_FORMAT "B, soft " SIZE_FORMAT "B",
+                      _target_occupancy, new_target_occupancy, G1CollectedHeap::heap()->soft_max_capacity());
   _target_occupancy = new_target_occupancy;
 }
 
@@ -81,6 +81,11 @@
   _last_marking_length_s(0.0) {
 }
 
+size_t G1StaticIHOPControl::get_conc_mark_start_threshold() {
+  guarantee(_target_occupancy > 0, "Target occupancy must have been initialized.");
+  return (size_t) (_initial_ihop_percent * _target_occupancy / 100.0);
+}
+
 G1AdaptiveIHOPControl::G1AdaptiveIHOPControl(double ihop_percent,
                                              G1Predictions const* predictor,
                                              size_t heap_reserve_percent,
@@ -108,7 +113,7 @@
   double safe_total_heap_percentage = MIN2((double)(_heap_reserve_percent + _heap_waste_percent), 100.0);
 
   return (size_t)MIN2(
-    G1CollectedHeap::heap()->max_capacity() * (100.0 - safe_total_heap_percentage) / 100.0,
+    G1CollectedHeap::heap()->soft_max_capacity() * (100.0 - safe_total_heap_percentage) / 100.0,
     _target_occupancy * (100.0 - _heap_waste_percent) / 100.0
     );
 }
@@ -154,6 +159,8 @@
   _allocation_rate_s.add(allocation_rate);
 
   _last_unrestrained_young_size = additional_buffer_size;
+
+  log_error(gc)("update alloc info: time %1.2fms bytes " SIZE_FORMAT " additional buffer " SIZE_FORMAT, allocation_time_s * 1000.0, allocated_bytes, additional_buffer_size);
 }
 
 void G1AdaptiveIHOPControl::update_marking_length(double marking_length_s) {