CODEWITHSUNDEEP
javacpu
Harshit
Harshit

Reputation: 5157

Get particular process CPU usage

I am trying to get the CPU usage with getSystemCpuLoad() using OperatingSystemMXBean.

Code

public static void main(String[] argv) throws Exception {
  OperatingSystemMXBean mbean=(com.sun.management.OperatingSystemMXBean)ManagementFactory.getOperatingSystemMXBean();
  double load;
  while(true){
    System.out.println(mbean.getSystemCpuLoad());

    try {
      Thread.sleep(1000);
    }
 catch (    InterruptedException e) {
      e.printStackTrace();
    }
  }
}

How can I get the CPU usage of any particular process like firefox.exe ?

Upvotes: 0

Views: 881

Answers (2)

Maksym
Maksym

Reputation: 4574

You can use some native lib or just parse response from:

 Process process = Runtime.getRuntime().exec("top | grep firefox");
 BufferedReader in = new BufferedReader(
               new InputStreamReader(process.getInputStream()) );

But java not assumed for those tasks, I would recommend to consider C++ or C for it...

Upvotes: 0

Yannick Rot
Yannick Rot

Reputation: 304

By using OperatingSystemMXBean you'll only achieve reading the CPU Usage of a JVM. You wont be able to retrieve the cpu-load of other processes.

You would need to call system-functions, therefore you would need JNI.

But theres a library called sigar which you could use. Its licensed under the Apache License, Version 2.0.

Upvotes: 2

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