7081064: G1: remove develop params G1FixedSurvivorSpaceSize,...

7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
Summary: Remove three develop parameters we don't use.
Reviewed-by: brutisso, jwilhelm

hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp

@@ -401,11 +401,9 @@ G1CollectorPolicy::G1CollectorPolicy() :
   _concurrent_mark_remark_times_ms->add(0.05);
   _concurrent_mark_cleanup_times_ms->add(0.20);
   _tenuring_threshold = MaxTenuringThreshold;
-
-  // if G1FixedSurvivorSpaceSize is 0 which means the size is not
-  // fixed, then _max_survivor_regions will be calculated at
-  // calculate_young_list_target_length during initialization
-  _max_survivor_regions = G1FixedSurvivorSpaceSize / HeapRegion::GrainBytes;
+  // _max_survivor_regions will be calculated by
+  // calculate_young_list_target_length() during initialization.
+  _max_survivor_regions = 0;
 
   assert(GCTimeRatio > 0,
          "we should have set it to a default value set_g1_gc_flags() "
@@ -2290,18 +2288,9 @@ void G1CollectorPolicy::calculate_max_gc_locker_expansion() {
 // Calculates survivor space parameters.
 void G1CollectorPolicy::calculate_survivors_policy()
 {
-  if (G1FixedSurvivorSpaceSize == 0) {
-    _max_survivor_regions = _young_list_target_length / SurvivorRatio;
-  } else {
-    _max_survivor_regions = G1FixedSurvivorSpaceSize / HeapRegion::GrainBytes;
-  }
-
-  if (G1FixedTenuringThreshold) {
-    _tenuring_threshold = MaxTenuringThreshold;
-  } else {
-    _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold(
+  _max_survivor_regions = _young_list_target_length / SurvivorRatio;
+  _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold(
         HeapRegion::GrainWords * _max_survivor_regions);
-  }
 }
 
 #ifndef PRODUCT

hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp

@@ -1090,18 +1090,12 @@ public:
   bool is_young_list_full() {
     size_t young_list_length = _g1->young_list()->length();
     size_t young_list_target_length = _young_list_target_length;
-    if (G1FixedEdenSize) {
-      young_list_target_length -= _max_survivor_regions;
-    }
     return young_list_length >= young_list_target_length;
   }
 
   bool can_expand_young_list() {
     size_t young_list_length = _g1->young_list()->length();
     size_t young_list_max_length = _young_list_max_length;
-    if (G1FixedEdenSize) {
-      young_list_max_length -= _max_survivor_regions;
-    }
     return young_list_length < young_list_max_length;
   }
 

hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp

@@ -249,16 +249,6 @@
           "When set, G1 will fail when it encounters an FP 'error', "       \
           "so as to allow debugging")                                       \
                                                                             \
-  develop(bool, G1FixedTenuringThreshold, false,                            \
-          "When set, G1 will not adjust the tenuring threshold")            \
-                                                                            \
-  develop(bool, G1FixedEdenSize, false,                                     \
-          "When set, G1 will not allocate unused survivor space regions")   \
-                                                                            \
-  develop(uintx, G1FixedSurvivorSpaceSize, 0,                               \
-          "If non-0 is the size of the G1 survivor space, "                 \
-          "otherwise SurvivorRatio is used to determine the size")          \
-                                                                            \
   product(uintx, G1HeapRegionSize, 0,                                       \
           "Size of the G1 regions.")                                        \
                                                                             \