/**
* statistic sth.
*
* <p>implement by subclass.
*
* @return statistic data
*/
protected String statistic() {
CPUUsage current = currentCPUUsage();
double usagePercent = current.usagePercent(_last);
double idlePercent = current.idlePercent(_last);
_last = current;
return String.format("%4.2f, %4.2f", usagePercent, idlePercent);
}
/**
* statistic sth.
*
* <p>implement by subclass.
*
* @return statistic data
*/
protected String statistic() {
CPUUsage currentCPU = currentCPUUsage();
ProcessUsage currentProcess = currentProcessUsage(_lPid);
long totalCPU = currentCPU.total() - _lastCPU.total();
double cpuPercent = currentCPU.usagePercent(_lastCPU);
double processPercent = currentProcess.usagePercent(_lastProcess, totalCPU) * _iCpuNum;
_lastCPU = currentCPU;
_lastProcess = currentProcess;
return String.format("%4.2f, %4.2f", processPercent, cpuPercent);
}
public double idlePercent(final CPUUsage last) {
long lastTotal = last.total();
long thisTotal = total();
long lastIdle = last._lIdle;
long thisIdle = this._lIdle;
double total = (double) (thisTotal - lastTotal);
double idle = (double) (thisIdle - lastIdle);
if (total < 0) {
total = 0.0;
}
if (idle < 0) {
idle = 0.0;
}
if (total > 0) {
return 100 * idle / total;
} else {
return 0.0;
}
}