code: @Override
  	protected int detectTotalCpuPercent() throws Exception {
  		if (sigar == null) {
  			return 0;
  		}
  		return (int) Math.max(sigar.getCpuPerc().getCombined() * 100d, 0d);
  	}
docs: Returns the system CPU usage, in percents, between 0 and 100.
  
  @return total CPU usage of the current OS