code: public int getTotalCpuPercent() {
  		if (invalidMonitor.get()) {
  			return 0;
  		}
  		long now = System.currentTimeMillis();
  		int cpu;
  		synchronized (Monitor.class) {
  			if (now - cpuDetectedAt > cacheTimeout) {
  				try {
  					cachedCPU = detectTotalCpuPercent();
  				} catch (Throwable cause) {
  					logger.info("Unable to detect CPU usage!", cause);
  					invalidMonitor.set(true);
  				}
  				cpuDetectedAt = now;
  			}
  			cpu = cachedCPU;
  		}
  		return cpu;
  	}
docs: Returns the cached system CPU usage, in percents, between 0 and 100.
  
  @return total CPU usage of the current OS