flushRememberedSets();
  public final void baseThreadLocalPrepare(int order) {    flushRememberedSets();    if (order == NON_PARTICIPANT)      VM_Interface.prepareNonParticipating((Plan) this);      else {      VM_Interface.prepareParticipating((Plan) this);        VM_Interface.rendezvous(4260);    }    if (Options.verbose >= 4) Log.writeln("  Preparing all collector threads for start");    threadLocalPrepare(order);  }