私のアプリケーションでは、アプリケーションの CPU 使用率をユーザーの希望する値まで増やし、ユーザーが関心を持つまで安定させたいと考えています。
top コマンドを使用して次の方法で合計 CPU 使用率を計算しています。
サンプルコード:
private long getCpuUsageStatistic() {
usage =0;
String tempString = executeTop(); // executeTop is method where I fire top command.
tempString = tempString.replaceAll(",", "");
tempString = tempString.replaceAll("User", "");
tempString = tempString.replaceAll("System", "");
tempString = tempString.replaceAll("IOW", "");
tempString = tempString.replaceAll("IRQ", "");
tempString = tempString.replaceAll("%", "");
for (int i = 0; i < 10; i++) {
tempString = tempString.replaceAll(" ", " ");
}
tempString = tempString.replaceAll(" ", " ");
tempString = tempString.trim();
String[] myString = tempString.split(" ");
int[] cpuUsageAsInt = new int[myString.length];
for (int i = 0; i < 2; i++) {
myString[i] = myString[i].trim();
cpuUsageAsInt[i] = Integer.parseInt(myString[i]);
//System.out.println("getCpuUsageStatistic-----"+cpuUsageAsInt[i]);
}
usage = cpuUsageAsInt[0]+cpuUsageAsInt[1];
System.out.println("getCpuUsageStatistic-----"+usage);
return usage;
}
And trying to incrase CPU usage by reducing sleeping time of running thread.
but, application COU usage is not increased.
My run method is like following::
public void run() {
while (true) {
try {
Thread.sleep(READ_INTERVAL);
totalUsage += cpuUpdate();
count++;
float cpuUsage = totalUsage / count;
if (count >= 10) {
if (cpuUsage >= desiredCpuUsage) {
System.out.println("cpu usage::%" + cpuUsage);
break;
} else {
System.out.println("cpu usage::%" + cpuUsage);
if(READ_INTERVAL / reducingFactor < 190)
{
if(cpuUsage / desiredCpuUsage< 0.2)
{
reducingFactor = reducingFactor / 1.2;
}
else if(cpuUsage / desiredCpuUsage < 0.5)
{
reducingFactor = reducingFactor / 1.5;
}
else if(cpuUsage / desiredCpuUsage < 0.6)
{
reducingFactor = reducingFactor / 3.0;
}
else if(cpuUsage / desiredCpuUsage < 0.7)
{
reducingFactor = reducingFactor / 4.0;
}
else if(cpuUsage / desiredCpuUsage < 0.75)
{
reducingFactor = reducingFactor / 5.0;
}
else if(cpuUsage / desiredCpuUsage < 0.8)
{
reducingFactor = reducingFactor / 6.0;
}
else if(cpuUsage / desiredCpuUsage < 0.85)
{
reducingFactor = reducingFactor / 7.0;
}
else if(cpuUsage / desiredCpuUsage < 0.9)
{
reducingFactor = reducingFactor / 9.0;
}
else if(cpuUsage / desiredCpuUsage < 0.95)
{
reducingFactor = reducingFactor / 12.0;
}
else
{
reducingFactor = reducingFactor / 15.0;
}
}
READ_INTERVAL-= reducingFactor;
}
cpuUsage=0;
count=0;
System.out.println("Read_interval" + READ_INTERVAL
+ "::cpu usage::%::" + cpuUsage);
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
CPUの使用量を増減するための解決策とテクニックを提供してください。前もって感謝します。