/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 votes203 views1 answer
Java string replace character at position
Java
0 vote175 views10 answers
Python to java converter
Java
0 vote224 views1 answer
Bad notification for startForeground: java.lang.RuntimeException: invalid channel for service notification: Notification
Java
2 votes225 views2 answers
Transpose of a matrix java
Java
1 vote204 views1 answer
Android java increment hashmap value
Java
4 votes225 views2 answers
Java import decimalformat
Java
0 vote202 views1 answer
Assign a random number in a set without replacement javva
Java
8 votes242 views4 answers
Java arraylist print
Java
2 votes252 views2 answers
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
Java
0 vote210 views2 answers
Sealed class in kotlin example
Java