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Computer Language Benchmarks Game      [[ Play ]]

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 performance measurements

Each table row shows performance measurements for this Java 7 program with a particular command-line input value N.

N	CPU secs	Elapsed secs	Memory KB	Code B	≈ CPU Load
500,000	0.73	0.44	18,172	432	33% 34% 63% 37%
5,000,000	2.58	2.11	75,660	432	25% 29% 35% 28%
50,000,000	18.63	16.89	142,128	432	29% 23% 24% 31%

Read the ↓ make, command line, and program output logs to see how this program was run.

Read thread-ring benchmark to see what this program should do.

 notes

java version "1.7.0_11"
Java(TM) SE Runtime Environment (build 1.7.0_11-b21)
Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode)

 thread-ring Java 7 #5 program source code

/**
 * The Computer Language Benchmarks Game
 * http://benchmarksgame.alioth.debian.org/
 * contributed by Birju Prajapati
 */

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class threadring {

    private static final int TOTAL_NODES = 503;
    private static final ExecutorService EXECUTOR = Executors.newFixedThreadPool(TOTAL_NODES);
    
    private static Node firstNode;
    private static Node lastNode;

    public static void main(String[] args) {
        firstNode = new Node(1);
        lastNode.next = firstNode;
        firstNode.push(Integer.parseInt(args[0]));
    }

    private static class Node implements Runnable {

        private final int id;
        private Node next;
        private int token;

        public Node(int id) {
            this.id = id;
            if (id++ == TOTAL_NODES) {
                lastNode = this;
            } else {
                next = new Node(id);
            }
        }

        private void push(int token) {
            this.token = token;
            EXECUTOR.execute(this);
        }

        public void run() {
            if (token-- != 0) {
                next.push(token);
            } else {
                System.out.println(id);
                System.exit(0);
            }
            
        }
    }
}

 make, command-line, and program output logs

Sun, 20 Jan 2013 16:37:35 GMT

MAKE:
mv threadring.java-5.java threadring.java
/usr/local/src/jdk1.7.0_11/bin/javac threadring.java
0.70s to complete and log all make actions

COMMAND LINE:
/usr/local/src/jdk1.7.0_11/bin/java  -server -XX:+TieredCompilation -XX:+AggressiveOpts threadring 50000000

PROGRAM OUTPUT:
292

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