Attachment 128676 Details for Bug 92310 – Freeze-Example (Java-Source)

Freeze-Example (Java-Source)

XFreezer.java (text/x-c), 2.07 KB, created by Linus Kaschulla on 2016-12-28 21:30:53 UTC

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Creator: Linus Kaschulla

Created: 2016-12-28 21:30:53 UTC

Size: 2.07 KB

patch

obsolete

>import javax.swing.*;
>
>/**
>  * Author: Linus Kaschulla
>  *
>  * This Java-Class spawns a Window and updates the title as much as possible
>  * which causes Xorg to freeze and stress out the computers CPU
>  * CPU-Usage goes up on all programs that control windows e.g. kwin_x11 (other compositors), cairo-dock, etc.
>  *
>  * Note: The Freeze can be up to 10 times longer than announced because XOrg has to handle the title-updates
>  *       even when the process has exited.
>  *
>  * How to execute:
>  * - Open a terminal
>  * - Make sure you installed the JDK
>  * - Paste this code into a file and go into that directory in your terminal
>  * - Execute: $ javac XFreezer.java
>  * - Start it using: $ java XFreezer <TimeInSeconds>
>  */
>public class XFreezer {
>	
>	public static String WINDOW_TITLE = "X-Freezer";
>	public static int WINDOW_WIDTH = 640, WINDOW_HEIGHT = 480;
>	
>	public static void main(String[] args){
>		
>		// How long the title gets updated
>		int durationSeconds = args.length == 0 ? 3 : Integer.parseInt(args[0]);
>		
>		// Creating Window
>		JFrame win = new JFrame(WINDOW_TITLE);
>		win.setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
>		win.setLocationRelativeTo(null);
>		win.setVisible(true);
>		
>		// Invoking Freeze-Method
>		long updatesTotal = freezeDesktop(win, durationSeconds * 1000);
>		
>		// Outputting Info
>		System.out.println("Update-Time: \t" + durationSeconds + " second(s)");
>		System.out.println("Title-Updates: \t" + (updatesTotal / durationSeconds) + " updates per second");
>		
>		// Killing process
>		System.exit(0);
>	}
>	
>	/**
>	  * Updates title of given window for the given Time
>	  */
>	public static long freezeDesktop(JFrame win, int millisDuration){
>		// Update-Counter:
>		long titleUpdates = 0;
>		// Time, when updating should be ended:
>		long till = System.currentTimeMillis() + millisDuration;
>		
>		// While-Loop that updates the Window-Title till time is expired
>		while(System.currentTimeMillis() < till){
>			// Updating title (changing to itself):
>			win.setTitle(win.getTitle());
>			// Increasing updatecounter:
>			titleUpdates++;
>		}
>		
>		// Returning updatecount
>		return titleUpdates;
>	}
>
>}

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Attachments on bug 92310: 128676 | 128677

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