Simple CPU Load Generator in Java

Load.java

package com.caffinc.grex.core;

/**
 * SPDX-License-Identifier: MIT
 *
 * Generates Load on the CPU by keeping it busy for the given load percentage
 * @author Sriram
 */
public class Load {
    /**
     * Starts the Load Generation
     * @param args Command line arguments, ignored
     */
    public static void main(String[] args) {
        int numCore = 2;
        int numThreadsPerCore = 2;
        double load = 0.8;
        final long duration = 100000;
        for (int thread = 0; thread < numCore * numThreadsPerCore; thread++) {
            new BusyThread("Thread" + thread, load, duration).start();
        }
    }

    /**
     * Thread that actually generates the given load
     * @author Sriram
     */
    private static class BusyThread extends Thread {
        private double load;
        private long duration;

        /**
         * Constructor which creates the thread
         * @param name Name of this thread
         * @param load Load % that this thread should generate
         * @param duration Duration that this thread should generate the load for
         */
        public BusyThread(String name, double load, long duration) {
            super(name);
            this.load = load;
            this.duration = duration;
        }

        /**
         * Generates the load when run
         */
        @Override
        public void run() {
            long startTime = System.currentTimeMillis();
            try {
                // Loop for the given duration
                while (System.currentTimeMillis() - startTime < duration) {
                    // Every 100ms, sleep for the percentage of unladen time
                    if (System.currentTimeMillis() % 100 == 0) {
                        Thread.sleep((long) Math.floor((1 - load) * 100));
                    }
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

I forked this gist and created a wrapper. Please check it out here on this.

@SriramKeerthi and @pradykaushik - I'd like to fork your work for demoing autoscaling in the cloud. Would you be open to adding licenses to your code that would make that legal? For a gist, this should be enough: (explanation)

//SPDX-License-Identifier: MIT

@SriramKeerthi and @pradykaushik - I'd like to fork your work for demoing autoscaling in the cloud. Would you be open to adding licenses to your code that would make that legal? For a gist, this should be enough: (explanation)

//SPDX-License-Identifier: MIT

I have added the license to my repository. If something does not work as intended please let us know by opening up an issue.

Added it, hope you get to build something cool with it.

I forked this gist and created a wrapper. Please check it out here on this.

That looks like a lot of good work done on this. I can't remember but I think I created a runnable jar version with a lot of configurations and a dashboard for this as well, but you seem to have put in a lot of work as well. Hope it's everything you want it to be.

This is awesome! Thank you

Thanks! Very helpfull