((VM_HardwarePerformanceMonitor)producer).notifyAppRunStart(app,run);
hpm.notifyAppRunStart(app,run);
  public void notifyAppRunStart(String app, int run)  {    if (VM_HardwarePerformanceMonitors.hpm_trace) {      if(VM_HardwarePerformanceMonitors.verbose>=2){ 	VM.sysWrite("VM_TraceWriter.notifyAppRunStart(",app,", ",run);	VM.sysWriteln(") PID ",pid);      }      if(trace_file == null) {	VM.sysWrite  ("***VM_TraceWriter.notifyAppRunStart(",app,", ",run);	VM.sysWrite  (") PID ",pid);	VM.sysWriteln(" trace_file == null!***");	return;	// VM.sysExit(-1);      }      ((VM_HardwarePerformanceMonitor)producer).notifyAppRunStart(app,run);    }   }