【发布时间】：2012-10-19 14:10:03
【问题描述】：
在我的应用程序中，我想将应用程序的 CPU 使用率增加到用户的期望值并使其稳定直到用户感兴趣。
我正在使用 top 命令使用以下方法计算总 CPU 使用率。
示例代码：
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();
}
}
}
请提供解决方案和任何技术来增加或减少 cpu 的使用率。
提前致谢。
【问题讨论】：
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你正在使用一个空字符串对象！
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不，它不为空。 m 在该方法中解析 top 命令输出。
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@NikkyD 感谢您的建议。我已经编辑了我的问题。