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;
}