src/cpu/arm/vm/vm_version_arm_64.cpp

@@ -199,11 +199,13 @@
     if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
       FLAG_SET_DEFAULT(UsePopCountInstruction, true);
     }
   }
 
-  AllocatePrefetchDistance = 128;
+  if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
+    FLAG_SET_DEFAULT(AllocatePrefetchDistance, 128);
+  }
 
 #ifdef COMPILER2
   FLAG_SET_DEFAULT(UseFPUForSpilling, true);
 
   if (FLAG_IS_DEFAULT(MaxVectorSize)) {