CPU usage: Java 1.6, Windows, jConsole

Java 1.6 has a new method to get the CPU usage:
java.lang.management.ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage()Unfortunately, it doesn't work on Windows (result = -1).
The Java 1.6 jConsole tool shows CPU usage on Windows. Is jConsole using another API?

You can get more info using the Sun's platform extensions, e.g.
java.lang.management.OperatingSystemMXBean os =
    ManagementFactory.getOperatingSystemMXBean();
if (os instanceof com.sun.management.OperatingSystemMXBean) {
    long cpuTime = ((com.sun.management.OperatingSystemMXBean) os).getProcessCpuTime();
    System.out.println("CPU time = " + cpuTime);
}For more detailed info on Sun's platform extensions have a look at:
http://java.sun.com/javase/6/docs/technotes/guides/management/
Regards,
Luis-Miguel Alventosa - JMX/JConsole/VisualVM dev team - http://blogs.sun.com/lmalventosa

Similar Messages

High CPU & Memory issues - Excessive and unnecessary CPU usage in Firefox for Windows (see also questions1003966 & 998289)

I am using the latest version of Firefox, 32.0.1, on an HP Pavilion dv7-4141sa laptop computer, running Windows 8.1 Pro 64-bit. There should be more than enough power here to run a browser without any problem, yet the computer is regularly being overloaded by the browser's resource usage.
I am currently measuring typical average CPU usage of 45% - with the browser minimised. That is to say, Firefox is not doing any browser jobs - it is not drawing on the screen - but it is using the most CPU of any process currently running. Why?
I am an ex-software engineer, and my understanding of current application development technology is limited, but I think I can say with some confidence that many techniques and software architectures exist that enable the suspension of program activity, or at least its reduction to a very low bare minimum, when the program is not actually carrying out its design function, which is in this case to draw pictures of website data on a screen.
There is a very serious problem here, one which means that I cannot run Firefox all the time, but have to kill it when I am not actively browsing, otherwise other applications cannot run to their full capacity. This is a great pity, because I have committed a lot of effort to making Firefox my primary web tool. It manages all my many bookmarks, contains my secure password manager (LastPass), manages my web security (via NoScript, AdBlock, and FlashBlock), just for a start.
Before any well-meaning moderators or other commenters start down the usual trail of "have you done this, tried that, disabled the other", I should point out that I have followed all the advice I can find, with no positive outcome. This computer is running a fresh installation of Windows, and a fresh installation of Firefox. At the moment I am running a new test Firefox profile.
The latest version of Adobe Flash, 14.0.0.179, is installed but disabled. When it is enabled and in use, Firefox's CPU usage seems high over longer periods, but overall there is little difference. It doesn't look as though the problem can be laid at Flash's door. A few other add-ins are installed, mainly those mentioned above, and Firefox is skinned with LavaFox v2-Green, but I have previously started from a clean installation, which has made little difference after an initial period during which things seemed to be better. Turning off or disabling various add-ons has made no discernible difference.
Just now I turned Flash on, and after a long period with Firefox minimised, Resource Monitor reported Firefox at 8% average CPU and FlashPlayerPlugin at 0.32%. While running a small video, RM reports FlashPlayerPlugin at about 45% and Firefox at 8%. After the video, Flash went back down to around 0.4%, and after a bit more browsing Firefox went to around 17% minimised. There seems little rhyme or reason here, except that Flash does not seem to be the culprit, although Firefox does seem to consume less when fewer tabs are actually active, as you might expect. I just refreshed more than a dozen tabs, and now Firefox is at 30%, but still not back up to the higher figures. Weird.
The CPU usage does vary a lot around the average, but 30% is still a lot for a program that shouldn't be doing anything above the minimum status maintenance, and still puts it at the top of my Top Process Monitor list. (Right now it's gone back up to 45%, without my using it in any way).
I have Telemetry turned on, so presumably Mozilla is recording some of the relevant data.
This is a very serious fault, which is more or less reproducible and which a lot of people seem to be experiencing. Probably more people have it than realise, because most users will not know anything other than that their computer slows down for some non-obvious reason; they may just think it's something to do with the computer itself, not knowing how to use the Resource Monitor and interpret the results.
Oddly, the problem does not seem to occur when running Firefox under Linux Mint 17, where the response is snappy and the CPU usage ostensibly low; I am going to look at this in more detail shortly.
I am not posting here for advice, but for information and as a form of bug report which hopefully other users will see. It will hopefully spare them a lot of effort and time in trying a lot of recommended "solutions" which will not work. The problem is inherent in the software, and can be solved only by Mozilla.
I am willing to supply any diagnostic data requested; as I said above, I have also turned on "Telemetry". However, I will not be trying out any more reinstallation/new-profile/add-on disable-enable-delete cycles unless I am asked to for very specific reasons. Please do not suggest courses of action which have already been mentioned elsewhere on this forum. I have tried them all.
The situation is very disappointing, but I have confidence that the Firefox developers will pin down the fault eventually and engineer a satisfactory solution that makes it viable to leave Firefox open all the time. Even with that restriction, it's still far better than the alternatives.

I share jmward's frustration. This is not a bug report so much as a request for a badly needed feature, ie the ability to have Firefox be able to tell us which tabs on which windows are eating time so we can target them. There are some very poorly written web pages out there which just plain loop while making no updates or inconsequential updates on the page.
This is not a OS problem; jmward runs Windows and I run Linux but we have the same issue. It is not a question of Firefox plugins or extensions, or even viruses; I have a new, clean Linux install but have the same problem on both my regular Firefox AND on a FRESH install of the latest Firefox (35.0.1) which has *NO* non-default plugins or extensions.
Here is an example of a web page which will eat 100% of one CPU's time:
http://patch.com/massachusetts/arlington/arlington-woman-allegedly-attacks-neighbor-snow-blower-0
I will attach 3 images to back up my claim. All of the images show my dark blue system monitor (gkrellm) superimposed on the web page. The top graph shows CPU time. I have 4 CPUs in my machine, so 25% means the web page is eating 100% of one CPU equivalent.
The first image shows the load of the offending page with elevated CPU usage along with the download net activity on eth0, but the CPU activity does not stop when the download activity is over.
The second images show the steady state 100% CPU equivalent of this page just sitting there apparently doing nothing. It IS, however, doing at least two different things. I know from my regular Firefox where I have "Remove It Permanently" installed that if I remove the the little weather indicator in the upper right of the offending page that CPU utilization drops to about 40% of one CPU equivalent. If I use RIP to remove everything else right down to a bare screen that 40% utilization stays until I delete the tab.
The third image shows the CPU utilization drop to zero when I delete the tab holding the offending page.
Now I will add a note here: If the offending page is NOT the top tab in a window then it stops eating time. The offender will also stop eating time if I minimize the window. However if I have another window up but leave the offender up on top in its window it continues to eat time even tho I am looking at another window. The offender will continue to eat time even if its window is completely covered by another window, and it will also eat time if I switch to another desktop.
I will often have half a dozen windows open, and there are many pages out there which will suck endless CPU time. Unless I want to open up a new tab on each window before I leave it there is likely to be some tab on top eating time uselessly. Get a couple of those going and Firefox becomes sluggish and can even stop responding for many seconds.
I guess I not only want to have Firefox tell us which tabs are eating time, but I would also like it if Firefox would stop giving CPU time to any tab which is not visible because it is covered by some other window and/or it is on a desktop which is currently not showing. If you can stop a tab's CPU usage by reason of tab-not-showing then you should also be able to stop its CPU usage when the window is covered or on the not-top desktop. Indeed is there any reason to not schedule absolute CPU utilization priority to the visible tab on the window with focus and give time to the other tabs only when the visible tab isn't using time?
My final thought on this is that I have had Firefox SO tied up sometimes that I swear their are web pages which are eating time even tho they are not the top tab. I regret that I do not have an example to show you. But Firefox grinds to a complete halt on a regular basis, and that is not acceptable. I am a programmer with long experience in multi-threaded programs so I *know* there is no reason you cannot do better. If there were another browser around which had the commitment to privacy which Firefox has I would probably switch out of shear annoyance. :-(

High cpu usage when moving application windows

Hello all,
I have two machines with arch installed:
- an eeepc 701 surf/intel gpu(xorg driver) with xfce
- an amd 3800+ X2/nvidia 8860 gt(proprietary driver) with kdemod3(also checked with xfce4)/arch amd64 installed.
I noticed that when i move a window of an application(for example konsole, etc..) too fast i get high cpu usage(30-40 %), when checking with htop.
Is it normal that the X server uses the cpu so much when moving a window??
EDIT: up to now i tested it in a friends windows machine, and it happens exactly the same, so i guess is normal. It seems i need to be informed better about how X works :-)
Last edited by mechmg93 (2008-10-15 08:04:10)

today i switced back my desktop system to debian unstable and tried to see what the difference is concerning this problem.
I found out that in kde3 the solution to the "problem" is debians kde default configuration about window behaviour.
Especially the one mentioned below :
In debian this is not ticked and this has as a result zero cpu usage when windows are moved.
Last edited by mechmg93 (2008-10-23 18:36:58)

Excesive CPU usage - java process OBI related

Hola a todos,
We have installed OBIEE 11.1.1.5 in a virtual machine (a clean one, just DB and OBI) and since a few weeks we've noticed perfomance issues. There is a java.exe process running with 30 - 50% CPU usage and if we stop it, OBIEE stops working as well, so we think it may be related, but we dont have any further clues.
Has anybody dealt with something liket his before or does anyone know if there's a log where we could check this?
Thanks in advance.

Tuning
Whether its a 64 bit or 32 bit of SUN or Jrocket ,
Please increase the heap size parameters to Xms & Xmx to atleast2048 (min and max to atleast) 2GB
Below were the comments from Oracle Support
Best Practices Guide for Tuning Oracle® Business Intelligence Enterprise Edition
In JRockit JVM (R28), the heap grows faster than before. The JVM also ensures that the heap size grows up to the maximum Java heap size (-Xmx) before an OutOfMemory error is thrown. In addition, the default value of the -Xmx option is changed from 1 GB to 3 GB on 64-bit OS. Note the JRockit JVM auto shrinks the heap if it is unused or if other applications require more physical memory.
Note: It is recommended to use the default garbage collection mode i.e. -Xgc:throughput. Also
large heap reduces the garbage collection frequency and fragmentation, improving the throughput
of the application; however, a large heap increases the memory footprint of the Java process.
*Warning: Make sure you have enough physical memory allocated / available on 64bit servers and then use the above settings as a starting point, and after load testing, adjust as needed. For a stable / an even performance over time, you should set the initial heap size (- Xms) to the same value as the maximum heap size (-Xmx).
Common JRockit JVM issues seen with BI (i.e. bi_server1) managed
servers:
Startup Times Take Longer When Using JRockit JVM Versus Sun JVM: The Oracle® JRockit JVM is by default optimized for server use, which means that the startup times can be longer in favor of high performance as soon as the application is up and running. Moreover, as the application runs, the JRockit JVM optimizes frequently called methods, improving the performance further.
When you run the JRockit JVM on a 64-bit system with a heap size less than 4 GB, if native OutOfMemory errors occurs despite memory being available only then add the parameter -XXcompressedRefs:size=32GB in JVM startup options to enable heap to grow up to 32 GB heap (practical limit of 25 GB). This will fix the issue native OutOfMemory errors. Moreover heap size still be restricted till the limits defined using -Xmx only benefit would be your heap will get the capability to grow beyond 4 GB up to 25 GB due to increase in size of pointer to
32 bit address.
On Oracle Solaris SPARC, due to the way classblock memory is reserved,Oracle® JRockit (R28) might occasionally run out of memory when a large number of classes are loaded (in the order of 100000).Workaround: The default value of -XX:MaxClassBlockMemory=50 MB, and a reasonable value is around 75 MB.
By design Oracle® JRockit will often use more memory than Sun JVM because JRockit compiles everything and is optimized for being a server-side JVM. So if
your customer have limited resources (i.e. CPU, memory) then it is recommended to experiment with switching to the Sun JVM which should save some system resources, but customer really should consider to do a performance tuning and sizing exercise, and determine if they have sufficient memory / CPU’s to support their requirements.
It is important to keep Oracle® JRockit R28.1.x up to date with latest fix release because the latest release provide fixes for security vulnerabilities, performance,
and other improvements of the Oracle® JRockit R28.1.x
Tuning 64bit Sun JVM
suggested
Minimum heap -Xms2048m Maximum heap -Xmx2048m
Minimum permanent generation heap -XX:PermSize=512m Maximum permanent generation heap -XX:MaxPermSize=512m
I'm not sure from where I've copied but save the same in text file.
This may help you.
Or check this (since you pointed to java.exe) http://docs.oracle.com/cd/E18930_01/html/821-2431/abeic.html
Edited by: veeravalli on Oct 25, 2012 7:38 AM

ITunes causes 90% CPU usage when the info window scrolls the song title

What's up with that little info window under the iTunes title? When the song title exceeds the width of the window iTunes does a little right to left banner scroll of the text. Whenever this happens the CPU jumps to 90% and stays there. This is especially bad for radio stations that have long text message strings in their titles. I have to keep iTunes minimized to avoid this GUI bug.
This just started happening with iTunes 7 and 7.0.1
Windows XP

iTunes on MBP in miniplayer mode and streaming to airport express. Wife changes songs through iPad remote and the CPU spikes to 90% and stays there. If I then select regular window mode, the CPU drops back to 7-8% (where it was before song change). It doesn't happen if I change songs through the MBP iTunes, only through the iPad remote. It's like it starts a process and doesn't close it out.
There's a couple of different things that can be going on here. Let's check on the one that involves the Mini Player first.
It seems to happen when the main iTunes player is set to Cover Flow rather than List view.
If you set iTunes to List view prior to switching to the Mini Player, does that stop the excessive CPU use while in Mini Player?

Measure Java CPU usage

Hi,
I'm not sure whether this is the right forum to post this message.
I have a java application and basically it takes lots of CPU time and memory. What my concern right now is the CPU usage. Basically I reduced the number of CPUs from 8 to 4 (Solaris v1280 box) and the CPU usage got increased from 30% to 90% :(
My requirement: Is there anyway that I can measure the CPU usage using Java code itself, so that I can insert those "set of APIs" (for measuring CPU usage), between APIs to collect the CPU usage data?
Thanks,
Siva

The comparison would be unfair (by your definition of unfair) in Java, too, since the JVMs for both platforms are different.
If you are dealing with time, though, 500 milliseconds is 500 milliseconds, no matter what language you write it on or what platform you run it on. If you use VC++ for the Windows stuff, make sure you disable Microsoft extensions so you have some ANSI standard code that will compile with gcc.
Since you are trying to compare operating systems, make sure both machines are using the same processors (and motherboards with the same PCI bus architecture), too. And have the same amount of memory, which is the same speed and architecture on both. Their hard drives should be roughly the same speed, too. The PCI bus usage could vary with network cards, so having the same network cards will be a plus. What it seems to come down to is that you are going to end up measuring the performance of the socket library implementations on both machines.
As far as JNI goes, all it is is a way to write native code and use it in your Java application. I don't know much about it, search around for some examples. There's a tutorial, somewhere, too. Some dude on here, tpritchet, seems to know a lot about it.
Jason

High CPU usage while running a java program

Hi All,
Need some input regarding one issue I am facing.
I have written a simple JAVA program that lists down all the files and directories under one root directory and then copies/replicates them to another location. I am using java.nio package for copying the files. When I am running the program, everything is working fine. But the process is eating up all the memories and the CPU usage is reaching upto 95-100%. So the whole system is getting slowed down.
Is there any way I can control the CPU usage? I want this program to run silently without affecting the system or its performance.

Hi,
Below is the code snippets I am using,
For listing down files/directories:
        static void Process(File aFile, File aFile2) {
          spc_count++;
          String spcs = "";
          for (int i = 0; i < spc_count; i++)
          spcs += "-";
          if(aFile.isFile()) {
               System.out.println(spcs + "[FILE] " + aFile2.toURI().relativize(aFile.toURI()).getPath());
               String newFile = dest + aFile2.toURI().relativize(aFile.toURI()).getPath();
               File nf = new File(newFile);
               try {
                    FileCopy.copyFile(aFile ,nf);
               } catch (IOException ex) {
                    Logger.getLogger(ContentList.class.getName()).log(Level.SEVERE, null, ex);
          } else if (aFile.isDirectory()) {
               //System.out.println(spcs + "[DIR] " + aFile2.toURI().relativize(aFile.toURI()).getPath());
               String newDir = dest + aFile2.toURI().relativize(aFile.toURI()).getPath();
               File nd = new File(newDir);
               nd.mkdir();
               File[] listOfFiles = aFile.listFiles();
               if(listOfFiles!=null) {
                    for (int i = 0; i < listOfFiles.length; i++)
                         Process(listOfFiles, aFile2);
               } else {
                    System.out.println(spcs + " [ACCESS DENIED]");
          spc_count--;
for copying files/directories:public static void copyFile(File in, File out)
throws IOException {
FileChannel inChannel = new
FileInputStream(in).getChannel();
FileChannel outChannel = new
FileOutputStream(out).getChannel();
try {
inChannel.transferTo(0, inChannel.size(),
outChannel);
catch (IOException e) {
throw e;
finally {
if (inChannel != null) inChannel.close();
if (outChannel != null) outChannel.close();
Please let me know if any better approach is there. But as I already said, currently it's eating up the whole memory.
Thanks in advance.

Simple Java 3D programs CPU Usage spikes to up to 90 percent!

Hi, everyone. Im completely new to Java 3D and Im toying around with basic program structure right now. My code is based off of that in the first chapter on 3D in Killer Game Programming in Java. I removed most of the scene elements, replacing them with a simple grid, Maya style. (Yes, Im starting off small, but my ambitions are grand I intend on creating a polygonal modeling and animation toolset. After all, the Maya PLE is dead damn you, Autodesk! and I just plain dislike Blender.) I implement a simple OrbitBehavior as a means for the user to navigate the scene. That part was basically copy and paste from Andrew Davisons code. The mystery, then, is why the programs framerate drops below 1 FPS and its CPU Usage spikes to up to 90 percent, according to the Task Manager, when I tumble the scene. Id appreciate anyone taking the time to look at the code and trying to identify the problem area. (Ive undoubtedly missed something totally newbish. -.-) Thank you!
(Also, I had the worst possible time wrestling with the posting process. Is anyone else having trouble editing their posts before submitting them?)
import java.awt.*;
import javax.swing.*;
public class MAFrame
    public static final Dimension SCREEN_SIZE = Toolkit.getDefaultToolkit().getScreenSize();
    public MAFrame ()
        System.out.println("Initializing...");
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        catch (Exception e) {
            e.printStackTrace();
        JFrame frame = new JFrame ("Modeling and Animation");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        MAViewPanel panel = new MAViewPanel ();
        frame.getContentPane().add(panel);
        frame.pack();
        frame.setLocation(((int)SCREEN_SIZE.getWidth() / 2) - (frame.getWidth() / 2),
                          ((int)SCREEN_SIZE.getHeight() / 2) - (frame.getHeight() / 2));
        frame.setVisible(true);
import com.sun.j3d.utils.behaviors.vp.*;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import java.awt.*;
import javax.media.j3d.*;
import javax.swing.*;
import javax.vecmath.*;
public class MAViewPanel extends JPanel
    public static final int GRID_SIZE = 12;
    public static final int GRID_SPACING = 4;
    public BoundingSphere bounds;
    public BranchGroup sceneBG;
    public SimpleUniverse su;
    public MAViewPanel ()
        GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D (config);
        canvas3D.setSize(600, 600);
        add(canvas3D);
        canvas3D.setFocusable(true);
        canvas3D.requestFocus();
        su = new SimpleUniverse (canvas3D);
        createSceneGraph();
        initUserPosition();
        orbitControls(canvas3D);
        su.addBranchGraph(sceneBG);
    public void createSceneGraph ()
        sceneBG = new BranchGroup ();
        bounds = new BoundingSphere (new Point3d(0, 0, 0), 1000);
        // ambient light
        Color3f white = new Color3f (1.0f, 1.0f, 1.0f);
        AmbientLight ambientLight = new AmbientLight (white);
        ambientLight.setInfluencingBounds(bounds);
        sceneBG.addChild(ambientLight);
        // background
        Background background = new Background ();
        background.setColor(0.17f, 0.65f, 0.92f);
        background.setApplicationBounds(bounds);
        sceneBG.addChild(background);
        // grid
        createGrid();
        sceneBG.compile();
    public void createGrid ()
        Shape3D grid = new Shape3D();
        LineArray lineArr = new LineArray (GRID_SIZE * 8 + 4, GeometryArray.COORDINATES);
        int offset = GRID_SIZE * GRID_SPACING;
        // both sides of the grid plus the middle, done for both directions at once (each line defined by two points)
        for (int count = 0, index = 0; count < GRID_SIZE * 2 + 1; count++) {
            // vertical, left to right
            lineArr.setCoordinate(index++, new Point3d (-offset + (count * GRID_SPACING), 0, offset)); // starts near
            lineArr.setCoordinate(index++, new Point3d (-offset + (count * GRID_SPACING), 0, -offset)); // ends far
            // horizontal, near to far
            lineArr.setCoordinate(index++, new Point3d (-offset, 0, offset - (count * GRID_SPACING))); // starts left
            lineArr.setCoordinate(index++, new Point3d (offset, 0, offset - (count * GRID_SPACING))); // ends right
        grid.setGeometry(lineArr);
        sceneBG.addChild(grid);
    public void initUserPosition ()
        ViewingPlatform vp = su.getViewingPlatform();
        TransformGroup tg = vp.getViewPlatformTransform();
        Transform3D t3d = new Transform3D ();
        tg.getTransform(t3d);
        t3d.lookAt(new Point3d (0, 60, 80), new Point3d (0, 0, 0), new Vector3d(0, 1, 0));
        t3d.invert();
        tg.setTransform(t3d);
        su.getViewer().getView().setBackClipDistance(100);
    private void orbitControls (Canvas3D c)
        OrbitBehavior orbit = new OrbitBehavior (c, OrbitBehavior.REVERSE_ALL);
        orbit.setSchedulingBounds(bounds);
        ViewingPlatform vp = su.getViewingPlatform();
        vp.setViewPlatformBehavior(orbit);
}

Huh. A simple call to View.setMinimumFrameCycleTime() fixed the problem. How odd that there effectively is no default maximum framerate. Of course simple programs like these, rendered as many times as possible every second, are going to consume all possible CPU usage...

My CPU usage jumps to 100 % when I use iTunes 10.6.1 -using Windows XP Service Pack 3

When I open itunes 10.6.1 my CPU usage jumps to 100%. it started doing this about 6 months ago when I updated itunes.

This helped me. You should try it. Now I can run itunes or Safari and my CPU usage is around 22%.
Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 & above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
If you do get a prompt after restart windows to remap LSP, just click NO.
Now launch your iTunes and see if it is working now.
If you are still having these type of problems after trying the winsock reset, refer to this article to identify which software in your system is inserting LSP:
iTunes 10.5 for Windows: May see performance issues and blank iTunes Store
http://support.apple.com/kb/TS4123?viewlocale=en_US

Windows 8.1 CPU Usage being used by Service Hosts

My problem has been persistant for several of days and I really need my CPU usage. Some Service Hosts using sometimes up to 50% of my CPU usage. I have tried using the Refresh tool in the advanced settings
which deletes everything installed to the computer to no prevail. I have even come to the idea of resetting to factory settings but I am beginning to think that the problem will still persist. I have seen several people have this problem with no solution that
is visible. I have not installed anything to make my CPU usage do this, I have clicked Run then typed in Services.msc and did some things in there. I saw somewhere that the Windows Modules Installer was one of those "CPU-eaters" along with Windows
Search, so I set there Start Up Type to Manual and put them to a halt. I will put a picture for these Service Host files and how much power each one individually takes. Before the Refresh I would click on the services and then try to end their task, still
no prevail. Please tell me how I can fix this, I don't really see a need to post my speculations for my computer since it is happening to a lot of other people on Windows 8.1, not a selected few. I hope someone will read my post through and help me, because
this is troublesome and limits the performance of my PC. Thank you for reading, I hope you have some solutions for my situation.
Images
As for the first image, I am showing you the Windows Module Installer Worker using up some CPU, and I am not installing a Windows update by the way.
As for the second image, I really don't understand what is happening since they are labeled all the same but numbers and networks. But still, they are eating at my usage, just one service taking up 40% is uncalled for in my books. Also,
as the Service Host rises, the System coincides with it too, rising at the same time. I really don't know how to go about fixing the Hosts. Maybe a downgrade to Windows 7 which I don't have? The most recent version of Windows I have on file is Windows Vista,
and well, I don't really want to go that far back.
When I tried to submit my question, I got some red text saying "Body text cannot contain images or links until we are able to verify your account.", and I don't really feel like waiting for that,
so you are just going to have to go off of the summaries I gave you. Sorry.

Hi,
Can you use process explorer to narrow down the culprit?
Process Explorer v16.02
http://technet.microsoft.com/en-in/sysinternals/bb896653.aspx
Alex Zhao
TechNet Community Support

Windows 7 Bootcamp CPU Usage issue

I just newly installed Windows 7 bootcamp on my MacBook Pro (2010). The installtion ran smoothly. But there seems to be a problem for me. The bootup time from being on to off or vice versa is 7 seconds flat.
And when I play games, my CPU usage would shoot up into the 80%-100%s making my screen freeze every 2 minutes, and typing anything onto a screen would take 2 seconds for my computer to compute.
Note: This was not the first time i install windows 7. The first time I did it, everything ran so smooth and fast. the bootup time would be at 2 seconds flat. no freezes when I play games or open anything up. How could I fix this?

Hi,
I have an update so I thought I would share in case any other users are experiencing a similar problem.
I made an appointment with the Genius Bar at the Apple Store.
I went in and they ran a thorough diagnostic check on my Macbook Air and determined that the sensors were indeed faulty - several were providing no information "No reading" instead of providing a temperature. Thus, the Air was unaware of the temperature across multiple components.
Despite the laptop being outside the 12 Month Manufacturer Warranty, the Apple Store determined that it was covered under warranty through Australian Consumer Law - the laptop is now in for a complete repair under warranty at no cost to myself.
I couldn't be happier.

Cpu usage in java program

i have writen a java program and run on unix, the program will create a connection object which connects to a db, and create a scoket to communicate with another machine.
However, when i use the "top" command in unix and check cpu usage, it used about 35% at the begining, and after few seconds, it drops around 7-8%. May I ask if this is normal? any tips on writing java program which can save more system resources?
please advice. Thanks

Hello friend ,
I am Narayanan from PSNA ENGG College, Dindigul , TN ... I try to find CPU Usage in java and get success.... I am also try form same VC++ file... Try this following steps
if u wont get mail me::: [email protected]
Bye
Steps:
1. Create java file with name CPUUti.java
          class CPUUti {
          public native void displayCPUUsage();
          static {
          System.loadLibrary("hello");
          public static void main(String[] args) {
          new CPUUti().displayCPUUsage();
2.compile the program
               javac CPUUti.java
               Result: Get Class file
3.Create header file
               javah CPUUti
               Result: Header file CPUUti.h is created
4.Open the VC++ with Design wizard
          choose Win32 Dynamic Link Libarary
          Give Projectname, location
5.copy the source file and Header files which you want
Source files:
               CpuUsage.cpp
               Main.cpp
               StdAfx.cpp
Header Files:
               CpuUsage.h
               PerfCounters.h
               StdAfx.h
6. include the Header file CPUUti.h in header file
7. create new C++ source file getCPU.cpp in the same project
8.include getCPU.cpp file to the Sourcefile list in the same project
9.copy this code in to getCPU.cpp
               #include "CpuUsage.h"
               #include "CPUUti.h"
               #include "PerfCounters.h"
               #include "StdAfx.h"
               JNIEXPORT jint JNICALL Java_CPUUti_Display
               (JNIEnv * s, jobject s1)
                    CCpuUsage usageA;
                    CCpuUsage usageB;
                    while (true)
                         // Display the system-wide cpu usage and the "Explorer" cpu usage
                         int SystemWideCpuUsage = usageA.GetCpuUsage();
                         int ProcessCpuUsage = usageB.GetCpuUsage("explorer");
                         printf("System-wide Cpu Usage: %3d%%, Explorer cpu usage: %3d%%\r",SystemWideCpuUsage, ProcessCpuUsage);
                         Sleep(1000);
                    return 0;
10. copy the headerfiles which is present in the jdk\include and jdk\include\win 32
paste to the VC++\include\
11.Build the VC++ file.
12.DLL file is created inside the Debug\ folder
13.copy that DLL file and paste it to the java source file location
Run the java file and enjoy...................

Evenlog viewing causes CPU usage 100% on Windows server 2008 SP2

We have Windows server 2008 SP2 with strange behaviour. When I scroll down events in eventlog viewer CPU usage hits 100% and eventlog viewer freeze. CPU usage is split between 2 processes SVCHOST.EXE (lmhosts, eventlog and Dhcp services) and MMC.EXE.
1)I tried to replace eventlog files with new ones. That didn’t helped
2)After server clean boot problem still exist.
3)When CPU hits 100% usage process explorer shows that from SVCHOST.EXE process CPU is used by service EventLog.
Any ideas how to fix this?

Hi Santosh
I re-installed VMware
tools and also configured VMXNET 3 - nothing changed :(
Sorry to hear that.
Windows event log service has couple of dependencies i.e. task scheduler and windows event collector service. Can try restrating those services ?
In addition to above, try following steps
Change NTFS permission of %WINDIR%\System32\WinEvt\Logs directory, add Local Service and
Network Service, give them FULL permissions.
Stop and Start event viewer service by running following command
net stop eventlog && net start eventlog
Issues like this might occur if the disk (FC or iSCSI SAN or even NAS) has some inconsistencies , this is true in case of both physical and virtual machines
You might want to try running chkdisk as well on the server in question
http://technet.microsoft.com/en-us/library/cc730714(v=ws.10).aspx
If nothing helps, try inplace upgrade of the Operating system as an last option.
How to Perform an In-Place Upgrade on Windows Vista, Windows 7, Windows Server 2008 & Windows Server 2008 R2
http://support.microsoft.com/kb/2255099
Thanks
Regards, Santosh
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Mark As Answer if a post answers your question.

Cpu usage high on macbook air in Windows 8.1

Guys Please Help me!!!
I have installed windows 8.1 using Bootcamp. And each time I open my Task manger the Cpu usage spikes to 100 and return to normal. I searched internet several hours. I installed antivirus but it didn't help me. I re installed windows 8.1 and didn't install anything yet but the same thing occurs. Is this a external problem?
Model= Mac air A1466.. 13 inch
http://prntscr.com/4imrae

I have had bootcamp running on this computer for since june last year and this has only just started happening. where abouts do i get the windows support software? that could be the problem

Server 2012R2 Windows backup 100% CPU usage and no backup

Hello!
I have a problem with two VM´s on a HP Proliant ML350p Gen8, that has Windows Server 2012R2 operating system with Hyper-V role installed.
Both VM´s are also 2012R2, one is DC/DNS/FILE/PRINT and the other one is Exchange 2013.
The problem itself is that, when Windows backup (wbengine.exe - Block level backup engine service) inside VM starts, it uses almost maximum CPU resource, so the VM´s CPUs are 100% used. Backup itself is not working, there is no network trafic. Only
way to get rid of 100% CPU usage is to restart the server.
When i start backup manually (Backup once - scheduled backup options), it is working and the CPU usage is around 20-30%.
One VM (DC/DNS/FILE/PRINT) has 2x vCPU and Exchange has 4x vCPU.
The problem started suddenly, the backup were performing slowly and failed.
Backups are scheduled on different time. Host level Hyper-V backup of VM´s works without any problem.
The backup location is Synology DS414 NAS and the servers are set up using iSCSI, for connecting separate backup lun´s for each server.
The Hyper-V host and both VM´s are patched up-to-date. Ofcourse i have tried a lot of restarts, looking event log, VSSADMIN - cannot find any errors...
The network setup:
Hyper-V host has a team of two physical adapters, that is set up with a external virtual switch (shared with management operating system) and used by the VM`s normal network trafic.
Hyper-V host itself is using separte physcial network card, for connecting with iSCSI to Synology NAS.
I tried to set up another physical network card on the host and create a new virtual swich, add extra virtual nic to VM`s and use this for iSCSI traffic for Windows backup and it didnt make things better.
I need to find a solution, because i cannot restart the server every night for the backups to work.

Hi,
There is a similar thread, please change the performance options in WSB from fast to normal:
wbengine.exe taking all CPU
http://social.technet.microsoft.com/Forums/en-US/be5d5743-1ea7-4c26-8072-0c010b47dd9a/wbengineexe-taking-all-cpu?forum=winserveressentials
If the issue still exists, please check if there any error message in the Event Log.
Best Regards,
Mandy
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CPU usage: Java 1.6, Windows, jConsole

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