src/share/vm/runtime/virtualspace.hpp

rev 7191 : 8058354: SPECjvm2008-Derby -2.7% performance regression on Solaris-X64 starting with 9-b29
Summary: Allow use of large pages for auxiliary data structures in G1. Clean up existing interfaces.
Reviewed-by: jmasa, pliden, stefank

@@ -52,11 +52,16 @@
   void protect_noaccess_prefix(const size_t size);
 
  public:
   // Constructor
   ReservedSpace();
-  ReservedSpace(size_t size);
+  // Initialize the reserved space with the given size. If prefer_large_pages is
+  // set, if the given size warrants use of large pages, try to force them by
+  // passing an alignment restriction further down. This may waste some space
+  // if the given size is not aligned, as the reservation will be aligned up
+  // to large page alignment.
+  ReservedSpace(size_t size, bool prefer_large_pages = false);
   ReservedSpace(size_t size, size_t alignment, bool large,
                 char* requested_address = NULL,
                 const size_t noaccess_prefix = 0);
   ReservedSpace(size_t size, size_t alignment, bool large, bool executable);