/Java/Java determine number of cpu cores

Java determine number of cpu cores

private int getNumberOfCPUCores() {
    OSValidator osValidator = new OSValidator();
    String command = "";
    if(osValidator.isMac()){
        command = "sysctl -n machdep.cpu.core_count";
    }else if(osValidator.isUnix()){
        command = "lscpu";
    }else if(osValidator.isWindows()){
        command = "cmd /C WMIC CPU Get /Format:List";
    }
    Process process = null;
    int numberOfCores = 0;
    int sockets = 0;
    try {
        if(osValidator.isMac()){
            String[] cmd = { "/bin/sh", "-c", command};
            process = Runtime.getRuntime().exec(cmd);
        }else{
            process = Runtime.getRuntime().exec(command);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

    BufferedReader reader = new BufferedReader(
            new InputStreamReader(process.getInputStream()));
    String line;

    try {
        while ((line = reader.readLine()) != null) {
            if(osValidator.isMac()){
                numberOfCores = line.length() > 0 ? Integer.parseInt(line) : 0;
            }else if (osValidator.isUnix()) {
                if (line.contains("Core(s) per socket:")) {
                    numberOfCores = Integer.parseInt(line.split("\\s+")[line.split("\\s+").length - 1]);
                }
                if(line.contains("Socket(s):")){
                    sockets = Integer.parseInt(line.split("\\s+")[line.split("\\s+").length - 1]);
                }
            } else if (osValidator.isWindows()) {
                if (line.contains("NumberOfCores")) {
                    numberOfCores = Integer.parseInt(line.split("=")[1]);
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    if(osValidator.isUnix()){
        return numberOfCores * sockets;
    }
    return numberOfCores;
}

Source: stackoverflow.com

Java determine number of cpu cores

int cores = Runtime.getRuntime().availableProcessors();

Source: stackoverflow.com

Similar codes

0 vote367 views1 answer
Java abstract modifier
Java
0 vote405 views1 answer
Ternary operator in java for null check
Java
0 vote345 views1 answer
Ferrari class in java
Java
0 vote328 views1 answer
Java 1.8.0 (64 bit) free download
Java
0 vote374 views1 answer
Java toarray
Java
4 votes345 views1 answer
Concurrent modification exception
Java
0 vote367 views1 answer
Arrondi java
Java
0 vote333 views1 answer
Android view set padding programmatically
Java
3 votes340 views6 answers
How to change the value of an arraylist in java
Java
3 votes357 views1 answer
How to append character at first position in stringbuilder java
Java