src/share/vm/prims/whitebox.cpp

rev 7746 : 8058354: SPECjvm2008-Derby -2.7% performance regression on Solaris-X64 starting with 9-b29
Summary: Allow partial use of large pages for auxiliary data structures in G1.
Reviewed-by:

*** 87,96 ****
--- 87,100 ----
  
  WB_ENTRY(jint, WB_GetVMPageSize(JNIEnv* env, jobject o))
    return os::vm_page_size();
  WB_END
  
+ WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
+   return os::large_page_size();
+ WB_END
+ 
  class WBIsKlassAliveClosure : public KlassClosure {
      Symbol* _name;
      bool _found;
  public:
      WBIsKlassAliveClosure(Symbol* name) : _name(name), _found(false) {}
*** 1220,1229 ****
--- 1224,1234 ----
    {CC"getObjectAddress",   CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectAddress  },
    {CC"getObjectSize",      CC"(Ljava/lang/Object;)J", (void*)&WB_GetObjectSize     },
    {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
    {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
    {CC"getVMPageSize",      CC"()I",                   (void*)&WB_GetVMPageSize     },
+   {CC"getVMLargePageSize", CC"()J",                   (void*)&WB_GetVMLargePageSize},
    {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
    {CC"parseCommandLine",
        CC"(Ljava/lang/String;C[Lsun/hotspot/parser/DiagnosticCommand;)[Ljava/lang/Object;",
        (void*) &WB_ParseCommandLine
    },