/// // the Units enum must be kept in synchronization with the
/// // the com.sun.hotspot.perfdata.Units class
/// enum Units {
/// U_None = 1,
/// U_Bytes = 2,
/// U_Ticks = 3,
/// U_Events = 4,
/// U_String = 5,
/// U_Hertz = 6,
/// U_Last = U_Hertz
/// };