Java MathUtil.countNonZeroBeginning方法代码示例

import org.cloudbus.cloudsim.util.MathUtil; //导入方法依赖的package包/类
/**
 * Gets the host utilization iqr.
 * 
 * @param host the host
 * @return the host utilization iqr
 */
protected double getHostUtilizationIqr(PowerHostUtilizationHistory host) throws IllegalArgumentException {
	double[] data = host.getUtilizationHistory();
	if (MathUtil.countNonZeroBeginning(data) >= 12) { // 12 has been suggested as a safe value
		return MathUtil.iqr(data);
	}
	throw new IllegalArgumentException();
}
 

import org.cloudbus.cloudsim.util.MathUtil; //导入方法依赖的package包/类
/**
 * Gets the host utilization mad.
 * 
 * @param host the host
 * @return the host utilization mad
 */
protected double getHostUtilizationMad(PowerHostUtilizationHistory host) throws IllegalArgumentException {
	double[] data = host.getUtilizationHistory();
	if (MathUtil.countNonZeroBeginning(data) >= 12) { // 12 has been suggested as a safe value
		return MathUtil.mad(data);
	}
	throw new IllegalArgumentException();
}
 

import org.cloudbus.cloudsim.util.MathUtil; //导入方法依赖的package包/类
/**
 * 计算出使用率的中位数绝对离差 Gets the host utilization mad.
 * 
 * @param host the host
 * @return the host utilization mad
 */
protected double getHostUtilizationMad(PowerHostUtilizationHistory host) throws IllegalArgumentException {
	double[] data = host.getUtilizationHistory();
	if (MathUtil.countNonZeroBeginning(data) >= 12) { // 12 has been suggested as a safe value
		return MathUtil.mad(data);
	}
	throw new IllegalArgumentException();
}
 

import org.cloudbus.cloudsim.util.MathUtil; //导入方法依赖的package包/类
/**
 * Computes the host utilization IRQ used for generating the host over utilization threshold.
 *
 * @param host the host
 * @return the host CPU utilization percentage IQR
 */
@Override
public double computeHostUtilizationMeasure(PowerHostUtilizationHistory host) throws IllegalArgumentException {
    final double[] data = host.getUtilizationHistory();
    if (MathUtil.countNonZeroBeginning(data) >= MIN_NUM_OF_HISTORY_ENTRIES_TO_COMPUTE_IRQ) {
        return MathUtil.iqr(data);
    }

    throw new IllegalArgumentException("There is not enough Host history to compute Host utilization IRQ");
}
 

import org.cloudbus.cloudsim.util.MathUtil; //导入方法依赖的package包/类
/**
 * Computes the host utilization MAD used for generating the host over utilization threshold.
 *
 * @param host the host
 * @return the host utilization MAD
 * @throws {@inheritDoc}
 */
@Override
public double computeHostUtilizationMeasure(PowerHostUtilizationHistory host) throws IllegalArgumentException {
    final double[] data = host.getUtilizationHistory();
    if (MathUtil.countNonZeroBeginning(data) >= MIN_NUM_OF_HISTORY_ENTRIES_TO_COMPUTE_MAD) {
        return MathUtil.mad(data);
    }

    throw new IllegalArgumentException("There is not enough Host history to compute Host utilization MAD");
}