/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

2 votes209 views2 answers
Leetcode even digits
Java
0 vote258 views1 answer
Java fx custom cell factory for combo box
Java
3 votes208 views2 answers
Java sout
Java
25 votes194 views3 answers
Random in java a to b
Java
0 vote203 views1 answer
How to convert arraylist to iterable in java
Java
0 vote204 views2 answers
How to embed element in to array
Java
0 vote192 views2 answers
Replacing string with dynamic avalues java
Java
22 votes203 views6 answers
Height of Binary tree
Java
0 vote280 views1 answer
Java stream write to file
Java
0 vote231 views2 answers
Decision tree drools using spring boot
Java Spring