Negative Impact of Hyper Threading and Planning

Hi,
It has come to my attention that on some Hyperion Apps, it is NOT recommended that Hyper Threading is used. Can anyone clarify this? I have searched Oracle and have found nothing concrete on this subject.
Thanks,
Sam

As previously stated, Hyperthreading is not recommended for Hyperion, as it does not provide any real performance value. Additionally, for Hyperion Financial Management, there have been documented support cases of problems with Hyperthreading causing problems with consolidations. Below is an excerpt from the HFM 9.3.1 readme
"HyperThreading is not recommended for application servers running on Windows 2000 Server; however, Advanced Windows 2000 Server and Windows 2003 Enterprise Edition are supported."
As a general rule when tuning/building a System 9 infrastructure, Hyperthreading should be turned off on all Hyperion servers.
Thanks!

Similar Messages

Negative Impact of Hyper Threading and Essbase

Hi,
It has come to my attention that on some Hyperion Apps, it is NOT recommended that Hyper Threading is used. Can anyone clarify this? I have searched Oracle and have found nothing concrete on this subject.
Thanks,
Sam

Hi Sam,
I didn't know anything about this issue so I asked some of my friends at Oracle.. Here are a couple of tidbits I dug up:
"For production environment, as you aware of, Essbase Calculation Engine is one of the world's most advanced number-crunching engines. And usually number crunching applications require intensive floating-point computations; therefore, to get the best performance, expend your resources to acquire the fastest CPU you can. Opt for a faster CPU instead of better L2 and L3 cache, if you have the money, go for the better L2 cache first and then better L3 cache. Note that L2 and L3 cache make a much bigger difference in OLAP applications than in OLTP applications (please note, Essbase does not utilize hyperthreaded CPUs or Hyper-Threading Technology)."
Another tidbit:
"As to hyperthreading,we have not had any real issues with it. The only thing that really ends up being a problem is that hyperthreading seems to limit the available memory".
So, unofficially, there are a couple of pieces of information for you.
Tim Tow
Oracle ACE
Applied OLAP, Inc

Negative Impact of Hyper Threading and HFM

Hi,
It has come to my attention that on some Hyperion Apps, it is NOT recommended that Hyper Threading is used. Can anyone clarify this? I have searched Oracle and have found nothing concrete on this subject.
Thanks,
Sam

As previously stated, Hyperthreading is not recommended for Hyperion, as it does not provide any real performance value. Additionally, for Hyperion Financial Management, there have been documented support cases of problems with Hyperthreading causing problems with consolidations. Below is an excerpt from the HFM 9.3.1 readme
"HyperThreading is not recommended for application servers running on Windows 2000 Server; however, Advanced Windows 2000 Server and Windows 2003 Enterprise Edition are supported."
As a general rule when tuning/building a System 9 infrastructure, Hyperthreading should be turned off on all Hyperion servers.
Thanks!

Once and for all: Hyper-threading, turbo boost on Core i5 MBA?

Hey, all.
There is a lot of conflicting information on whether the new Core i5 MacBook Airs (as opposed to the upgraded Core i7 options) support hyper-threading. As best I can gather, there is still no "official" Apple statement on the subject. I thought I'd gin up another conversation in the event someone has more definitive information. In case anyone wants a fresh bit of provocation, earlier today I asked one of Apple's online "Live Chat" experts. Here's what she said:
The Core i7 offers Triple Channel memory, hyper-threading, and full dual 16x video bandwidth.
But the i5 doesn't offer the TurboBoost or hyperthreading.
You would have to do the upgrade to the i7 for that.
Agree? Disagree?

Here is a comparison of the three processors used for the 2011 MBA.
It would appear that the i5 does have Turbo Boost (and Hyperthreading), unless Apple's specification calls for disabling TB.
But, if we look at some of the benchmark testing, the results would seem to imply that the specification only differs by the differences shown in these charts, hence Turbo Boost would be evident across all the Airs.

DISABLE HYPER-THREADING!!!

In this topic (http://discussions.apple.com/thread.jspa?messageID=1429910#1429910) jimsg4 suggested disabling Hyper-Threading. I did so, using the System Manager in WindowsXP, which is rebooting and hitting F2 when you get the startup screen, then navigating down to Hyper-Threading, and turning it off. That fixed all iPod/iTunes freezing problems, now it works like it should. So, if you have Hyper-Threading enabled in your box, try disabling it. That was an amazing shot in the dark, thanks jim!!!
c.

I'm still here, still using the same software, but still no answer. Has anyone any idea how to sort it out?
Thanks!

License requirements with hyper-threaded CPUs?

We have purchased a production license for Enterprise edition for a max of 3 CPUs. When we attempt to start Coherence on a production platform (dual hyper-threaded Xeon) we get the following licensing error: "2004-08-21 10:51:40.906 Tangosol Coherence 2.3/273 (thread=Cluster, member=n/a): The number of CPUs used exceeds the maximum number allowed by the license." We are only using two physical CPUs.
We disabled hyper-threading and Coherence started successfully. Is hyper-threading confusing the licensing mechanism by making it appear as though we are using 4 CPUs? If so, is there some method by which we can configure Tangosol to work around this issue or are we forced to purchase an additional CPU license?
Thanks in advance!

Hi Andy,
I have emailed you the necessary production command line argument to resolve this issue.
Later,
Rob Misek
Tangosol, Inc.

Intel Xeon Hyper Threading

Hi there,
Any experienxes with $SUBJECT and Solaris 10?
How stable is hyper threading support, and how much does it degrade performance, if I switch it off?
I've read about the security vulnerability with hyper threading, but I don't really care about it. I'm more interested in performance/stability.
Thanks,
Imre Csatlos

CPU_COUNT is a parameter dinamically adusted by the Oracle instance. Oracle perfectly supports hyper threading and there is no need to change the value of this parameter.

RegionRenderer encodeAll The region component with id: pt1:r1 has detected a page fragment with multiple root components. Fragments with more than one root component may not display correctly in a region and may have a negative impact on performance.

Hi,
I am using JDEV 11.1.2.1.0
I am getting the following error :-
<RegionRenderer> <encodeAll> The region component with id: pt1:r1 has detected a page fragment with multiple root components. Fragments with more than one root component may not display correctly in a region and may have a negative impact on performance. It is recommended that you restructure the page fragment to have a single root component.
Piece of code is for region is:-
   <f:facet name="second">
                                            <af:panelStretchLayout id="pa1"
                                                                   binding="#{backingBeanScope.Assign.pa1}">
                                                <f:facet name="center">
                                                    <af:region value="#{bindings.tfdAssignGraph1.regionModel}" id="r1"
                                                               binding="#{backingBeanScope.Assign.r1}"/>
                                                </f:facet>
                                            </af:panelStretchLayout>
                                        </f:facet>
How do I resolve it ?
Thanks,

Hi,
I see at least 3 errors
1. <RegionRenderer> <encodeAll> The region component with id: pt1:r1 has detected a page fragment with multiple root components.
the page fragment should only have a single component under the jsp:root tag. If you see more than one, wrap them in e.g. an af:panelGroupLayout or af:group component
2. SAPFunction.jspx/.xml" has an invalid character ".".
check the document (you can open it in JDeveloper if the customization was a seeded one. Seems that editing this file smething has gone bad
3. The expression "#{bindings..regionModel}" (that was specified for the RegionModel "value" attribute of the region component with id "pePanel") evaluated to null.
"pageeditorpanel" does seem to be missing in the PageDef file of the page holding the region
Frank

Oracle 9i R2 and Hyper threading

Hi
This is a matter of confusion to me, I've tested Oracle 9.2.0.1.0 on several machines with Hyper threading 1 CPU Intel and Dual Xeon servers.
When installing oracle the CPU_COUNT and PARALLEL_THREAD_PER_CPU parameters are set automatically.
ie: Intel 3.0 HT
CPU_COUNT = 2
PARALLEL_THREAD_PER_CPU = 2
Dual Xeon 2.8 HT
CPU_COUNT = 2
PARALLEL_THREAD_PER_CPU = 4
with this default settings our application is dragging it's feet (developped on 4.5 upgraded to 6i client/server)
But if we set
CPU_COUNT = 1
PARALLEL_THREAD_PER_CPU = 2
for the Intel the app goes lightspeed
and
CPU_COUNT = 1
PARALLEL_THREAD_PER_CPU = 1
for the xeon again lightspeed
I didn't face this problem with non HyperThreasding CPUs
My question:
Why is this anomoly, what's the workaround without changing the CPU_COUT parameter?
did anybody else face any problem like this? does this happen in 10g???
Thanks in Advance
Tony S. Garabedian

Any suggestions? Any ideas??

Is Hyper-threading enabled on the i5 and i7 iMacs

I am interested in upgrading to a 27" i5 or i7. According to intels site all i-core processors support Hyper-threading. At work I use a quad core Xeon on a HP computer with Windows 7. The system reports that I have 8 cores in performance monitor as it sees each core as 2 cores with Hyper-threading enabled in the Bios.
Does Apple enable hyper-theading in EFI and does Mac OSX see 8 cores in the activity monitor and correctly show the activity of each thread? I suspect if it only shows 4 cores that hyper-threading is not activated on the iMacs. I want to get the most out of the processors capabilities since I am paying a premium for it and so I wont get a current generation machine if it is crippling the processors ability to run 2 threads per core as intel advertises. I would expect with Grand Central in 10.6 that hyper-threading would dramatically increase performance.
Can someone answer this question definitively?

Intels site states clearly that the i3 i5 and i7 all support hyper threading.. if only the i7 supports it on the iMac then apple is crippling the chip..
http://www.intel.com/products/processor/corei5/index.htm
http://www.intel.com/products/processor/corei3/index.htm
So is apple crippling the chip????

Disable Intel CPU Hyper threading in Oracle RAC environment

Dear Expert,
Does disable CPU hyper threading will have direct impact or maybe unexpected behavior to Oracle RAC database?
Actually the background of this question is we have many received packet queuing on the network layer waiting to be processed. Investigation leads to the processor utilization which shows that many processor are still in idle state or not used when the other processors are busy processing incoming request.
I have visited some oracle note like
CPU Count Consideration for Oracle Parameter Setting When Using Hyper-Threading Technology (Doc ID 289870.1)
Oracle and Hyper-Threading (Doc ID 205089.1)
Using PROCESSOR_GROUP_NAME to bind a database instance to CPUs or NUMA nodes (Doc ID 1585184.1)
These document already give useful information but i wonder if there is any possibilities risk or another consideration of disabling cpu hyper threading.
Please let me know if any other information required.
Thanks.
Best Regards,
Jolly

As far as I know it is set as cpu architecture and mobile chips don't have the option. Not 100% as I've never needed to do it.
Better bet would be to check Intel ark and forums with them I expect.

A problem with Threads and MMapi

I am tring to execute a class based on Game canvas.
The problem begin when I try to Play both a MIDI tone and to run an infinit Thread loop.
The MIDI tone "Stammers".
How to over come the problem?
Thanks in advance
Kobi
See Code example below:
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
public class MainScreenCanvas extends GameCanvas implements Runnable {
     private MainMIDlet parent;
     private boolean mTrucking = false;
     Image imgBackgound = null;
     int imgBackgoundX = 0, imgBackgoundY = 0;
     Player player;
     public MainScreenCanvas(MainMIDlet parent)
          super(true);
          this.parent = parent;
          try
               imgBackgound = Image.createImage("/images/area03_bkg0.png");
               imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
               imgBackgoundY = this.getHeight() - imgBackgound.getHeight();
          catch(Exception e)
               System.out.println(e.getMessage());
      * starts thread
     public void start()
          mTrucking = true;
          Thread t = new Thread(this);
          t.start();
      * stops thread
     public void stop()
          mTrucking = false;
     public void play()
          try
               InputStream is = getClass().getResourceAsStream("/sounds/scale.mid");
               player = Manager.createPlayer(is, "audio/midi");
               player.setLoopCount(-1);
               player.prefetch();
               player.start();
          catch(Exception e)
               System.out.println(e.getMessage());
     public void run()
          Graphics g = getGraphics();
          play();
          while (true)
               tick();
               input();
               render(g);
      * responsible for object movements
     private void tick()
      * response to key input
     private void input()
          int keyStates = getKeyStates();
          if ((keyStates & LEFT_PRESSED) != 0)
               imgBackgoundX++;
               if (imgBackgoundX > 0)
                    imgBackgoundX = 0;
          if ((keyStates & RIGHT_PRESSED) != 0)
               imgBackgoundX--;
               if (imgBackgoundX < this.getWidth() - imgBackgound.getWidth())
                    imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
      * Responsible for the drawing
      * @param g
     private void render(Graphics g)
          g.drawImage(imgBackgound, imgBackgoundX, imgBackgoundY, Graphics.TOP | Graphics.LEFT);
          this.flushGraphics();
}

You can also try to provide a greater Priority to your player thread so that it gains the CPU time when ever it needs it and don't harm the playback.
However a loop in a Thread and that to an infinite loop is one kind of very bad programming, 'cuz the loop eats up most of your CPU time which in turn adds up more delays of the execution of other tasks (just as in your case it is the playback). By witting codes bit efficiently and planning out the architectural execution flow of the app before start writing the code helps solve these kind of issues.
You can go through [this simple tutorial|http://oreilly.com/catalog/expjava/excerpt/index.html] about Basics of Java and Threads to know more about threads.
Regds,
SD
N.B. And yes there are more articles and tutorials available but much of them targets the Java SE / EE, but if you want to read them here is [another great one straight from SUN|http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html] .
Edited by: find_suvro@SDN on 7 Nov, 2008 12:00 PM

Having a problem with threads and using locks

I was hoping someone could give me some hits on getting my code to run properly. The problem I am having is I think my locks and unlocks are not working properly. Plus, for some reason I always get the same output, which is:
Withdrawal Threads         Deposit Threads            Balance
Thread 2 attempts $29 Withdrawal - Blocked - Insufficient Funds
Thread 4 attempts $45 Withdrawal - Blocked - Insufficient Funds
Thread 6 attempts $34 Withdrawal - Blocked - Insufficient Funds
Thread 7 attempts $40 Withdrawal - Blocked - Insufficient Funds
                                Thread 1 deposits $187          $187
                                Thread 3 deposits $169          $356
                                Thread 5 deposits $61           $417
Press any key to continue...If someone can see the error I made and doesn't mind explaining it to me, so I can learn from it, I would appreciate that very much.
/************Assign2_Main.java************/
import java.util.concurrent.*;
public class Assign2_Main
{//start Assign2_Main
    public static void main(String[] args)
    {//start main
           // create ExecutorService to manage threads
           ExecutorService threadExecutor = Executors.newCachedThreadPool();
        Account account = new SynchronizedThreads();
        Deposit deposit1 = new Deposit(account, "Thread 1");
        Deposit deposit2 = new Deposit(account, "Thread 3");
        Deposit deposit3 = new Deposit(account, "Thread 5");
        Withdrawal withdrawal1 = new Withdrawal(account, "Thread 2");
        Withdrawal withdrawal2 = new Withdrawal(account, "Thread 4");
        Withdrawal withdrawal3 = new Withdrawal(account, "Thread 6");
        Withdrawal withdrawal4 = new Withdrawal(account, "Thread 7");
        System.out.println("Withdrawal Threads\t\tDeposit Threads\t\t\tBalance");
        System.out.println("------------------\t\t---------------\t\t\t-------\n");
        try
            threadExecutor.execute(withdrawal1);
            threadExecutor.execute(deposit1);
            threadExecutor.execute(withdrawal2);
            threadExecutor.execute(deposit2);
            threadExecutor.execute(withdrawal3);
            threadExecutor.execute(deposit3);
            threadExecutor.execute(withdrawal4);
        catch ( Exception e )
             e.printStackTrace();
            //shutdown worker threads
           threadExecutor.shutdown();
    }//end main
}//end Assign2_Main/******************Withdrawal.java****************************/
public class Withdrawal implements Runnable
{//start class Withdrawal
      *constructor
    public Withdrawal(Account money, String n)
         account = money;
         name = n;
    public void run()
    {//start ruin
         int newNum = 0;
            newNum = account.getBalance(name);
           Thread.yield();
    }//end run
    private Account account;
    private String name;
}//end class Withdrawal/*******************Deposit.java***************/
import java.util.Random;
public class Deposit implements Runnable
{//start class Deposit
      *constructor
    public Deposit(Account money, String n)
         account = money;
         name = n;
    public void run()
    {//start run
            try
                 Thread.sleep(100);
               account.setBalance(random.nextInt(200), name);
            }// end try
            catch (InterruptedException e)
              e.printStackTrace();
   }//end run
   private Account account;
   private Random random = new Random();
   private String name;
}//end class Deposit/********************Account.java*****************/
*Account interface specifies methods called by Producer and Consumer.
public interface Account
     //place sum into Account
     public void setBalance(int sum, String name);
     //return value of Account
        public int getBalance(String name);
} /**************SynchronizedThreads.java****************/
import java.util.concurrent.locks.*;
import java.util.Random;
public class SynchronizedThreads implements Account
{//start SynchronizedThreads
      *place money into buffer
    public void setBalance(int amount, String name)
    {//start setBalance
         // lock object
         myLock.lock();
        sum += amount;
        System.out.println("\t\t\t\t" + name + " deposits $" + amount +"\t\t$"+ sum+"\n");
           //threads are singnaled to wakeup
        MakeWD.signalAll();
          // unlock object
        myLock.unlock();
     }//end setBalance
      *gets the balance from buffer
     public int getBalance(String name)
    {//start getBalance
         int NewSum = random.nextInt(50);
         //lock object
        myLock.lock();
        try
             if(sum > NewSum)
                 //takes NewSum away from the account
                 sum -= NewSum;
                    System.out.println(name + " withdraws $" + NewSum +"\t\t\t\t\t\t$"+ sum+"\n");
            else
                 System.out.println(name + " attempts $" + NewSum + " Withdrawal - Blocked - Insufficient Funds\n");
                 //not enough funds so thread waits
                    MakeWD.await();
            //threads are singnaled to wakeup
            MakeD.signalAll();
            }//end try
        catch (InterruptedException e)
               e.printStackTrace();
        finally
             //unlock object
             myLock.unlock();
        return NewSum;
     }//end getBalance
     private Random random = new Random();
     private Lock myLock = new ReentrantLock();
     private Condition MakeD = myLock.newCondition();
     private Condition MakeWD = myLock.newCondition();
     private int sum = 0;
}//end SynchronizedThreads

You can also try to provide a greater Priority to your player thread so that it gains the CPU time when ever it needs it and don't harm the playback.
However a loop in a Thread and that to an infinite loop is one kind of very bad programming, 'cuz the loop eats up most of your CPU time which in turn adds up more delays of the execution of other tasks (just as in your case it is the playback). By witting codes bit efficiently and planning out the architectural execution flow of the app before start writing the code helps solve these kind of issues.
You can go through [this simple tutorial|http://oreilly.com/catalog/expjava/excerpt/index.html] about Basics of Java and Threads to know more about threads.
Regds,
SD
N.B. And yes there are more articles and tutorials available but much of them targets the Java SE / EE, but if you want to read them here is [another great one straight from SUN|http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html] .
Edited by: find_suvro@SDN on 7 Nov, 2008 12:00 PM

Java threads and WinLogon processes taking CPU!

We are seeing a strange problem. We have a multi-threaded java application
that is deployed on a Microsoft Windows 2000 server (SP4) with Citrix
Metaframe XP (Feature release 2). When this application starts, we start to see
multiple WINLOGON.EXE processes (20 plus) each taking up 1-2% of CPU -
this raises the CPU usage on the server significantly, impacting performance.
We have tested with JDK 1.3, 1.4, and 1.5 and see the same issues. If we
run the java application in a single thread, we dont see the same issue.
Has any one seen this problem before? Any suggestion on how this can be resolved?
Thanks in advance!

Thanks for your replies. This is a Citrix environment where there are 50 plus
users logged in and there are 50 plus instances of Winlogon.exe always
running. Most of the time the cpu usage of these processes is 0.
We tried a multi-threaded program that lists files in a directory every few
seconds. There are 40 plus servers in the farm that we are deploying this
application on. We are seeing this problem on only some of the servers.
If we run a single thread from main(), we dont see the issue. But if we spawn
10 threads doing the scans periodically, we notice that as soon as all the threads
start, the WinLogons appear to start to take up CPU. When we stop the java
program, the WinLogon processes drop in CPU usage.
Is it possible that Java and WinLogon share some dlls that could be triggering
the WinLogon processes off?
We have tried running the single thread and multi-threaded programs around
same time and the correlation with the winlogons is clearly visible. If we add
sleep() soon after we start a thread, the winlogons seem to kick in later.

Unable to detect Hyper Threading of CPU SL6WE 3.2 in MSI-865PE Neo2

Hi! I am new to this forum and need some help. I have just installed a Intel Pentium 4 3.2GHz Northwood SL6WE 478 800MHz/512k . I bought this on e-bay and understand that this cpu supports hyper threading. I have enabled hyper threading in the bios, but only see one cpu in Widows System Properties and only one cpu in Windows Task Manager. I had a 2.6 cpu installed previously, no hyper threading. My motherboard is an MSI-865PE Neo2 version 1.1, 2GB Ram ( 4x512 ?), Thermaltke TR2-430W power supply, Freezer 4 Arctic Cooler, Nvidia GeForce 6600, LG DVD RAM burner, 16x DVD ROM, WD 250 gig and an Hitachi 80 gig hard drive. I also used Arctic Silver 5 thermal paste (after using Arcticclean and Surface Purifier). Have I missed somethig? Would appreciate help in solving why I have no hyper threading.

200 7-3-3-2.5 Ultra Turbo and 212 5-3-3-2.5 Ultra Turbo is a
no boot. Thinks ultra-turbo tries to set mem timings to
2-2-2-5 below 218FSB and my memory can't do that.
Turbo boots ok. Normal setting disabled PAT.
200 2.5-3-3-7 Turbo PAT on 4.6GB/s
200 2.5-3-3-7 Normal PAT off 4.2GB/s
212 2.5-3-3-5 Turbo PAT on 4.8GB/s
212 2.5-3-3-5 Normal Pat off 4.5GB/s
Also tried 250 1:1, not prime95 stable
250 2.5-3-3-7 Ultra-turbo 6GB/s
I think pat is disabled above 218FSB on
1:1 and 5:4 setting, but not on 4:5 setting.
You should get close to or above 6GB/s at
1:1 250 3-3-3-5 bios overclocking.
Maybe something is running in the background
stealing cpu power or something?
Well, you have to test some more, maybe a
fresh windows setup will help?

Negative Impact of Hyper Threading and Planning

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