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Terminal server 2003 slow on hyper V

Posted on 2010-11-29
Medium Priority
Last Modified: 2012-05-10
I recently moved a terminal server to hyper V from physical server. CPU is hitting 100% and staying there consistantly through out the day. I moved it from a raid 5 to a raid 1 to improve performance, with just me logged in and trying to run a defragment the cpu is still high and has peaks of 100%. Is there anything else I can do to improve performance. I have 4 logical processors assigned and 4 gig of memory, the nic is reporting 10Gbps.
Question by:Sid_F
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Expert Comment

ID: 34234757
If this is where 2008 r2 is at, I believe 2003 is going to be " problemmatic" I could be wrong but that my feeling. In other words, look at todays software is:

My fear is the 2003 was not optimised for virtual anything. Take a look at the blog


you will certainly want to use procmon and perfmon to identify the processs or  perfmon issues... can you narrow it to a disk queue legnth or a process? Then the old troubleshooting is applicable. Please post that information after looking at the MS blog for 2003. try to narrow it down to a more specific question.

Author Comment

ID: 34234843
Yes this is 2008 r2. Will check out the links thanks

Author Comment

ID: 34237371
With a few users logged on it took over ten mins to open perfmon, cpu is running constantly at 100, its running so slow the perfmon window at times is unresponsive. avg disk queue length and page/sec are 50-100% peaks but never stay constant, cpu is %processor time is constantly at 100%
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Author Comment

ID: 34237976
Can can I identify what process is taking the cpu 100%, need to delve deeper but am not sure how

Author Comment

ID: 34238215
I checked this setup against another site that is running 2008 ts (not r2) however that site is showing up 4 processors in device manager but this server is showing up as 1 processor even though 4 have been specified in the vm settings

Author Comment

ID: 34247726
The issue relates to the HAL and the machine not picking up the processors properly. Once this was changed and the correct dll's installed, TS performance was massively improved and is now better performance that its original performance directly on hardware.

I will post the details as to the exact fix. Hopefully this will help others experiencing this problem

Accepted Solution

Sid_F earned 0 total points
ID: 34453657
Below is the fix

If you look in the C:\Windows\System32 folder, do you see the two files ntkrnlmp.exe and halmacpi.dll?
 If not, then you may need to copy the files into that folder. Sometimes the files are in a different folder, such as C:\WINDOWS\ServicePackFiles\i386, and you can simply copy them over.
If not you need to copy them from the Windows Install CD. You can do that from the command line (where K: is the DVD drive):
C:\>extract k:\i386\ntkrnlmp.ex_ c:\windows\system32\ntkrnlmp.exe
C:\>extract k:\i386\halmacpi.dl_ c:\windows\system32\halmacpi.dll
Once this has been done, then add the following to the boot.ini file
/KERNEL=ntkrnlmp.exe /HAL=halmacpi.dll
Reboot the server and you should see all of the processors successfully.

Author Closing Comment

ID: 34479050

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