Hyper-V performance counters in Windows Server 2008 are displayed incorrectly or report incorrect data when you remotely query the counters from a Windows Server 2003-based computer

When you use the performance monitor on a Windows Server 2003-based computer to query Hyper-V related performance counters on a Windows Server 2008-based computer that has the Hyper-V role enabled, the following problems occur.

Problem 1

The following objects are missing:

• Hyper-V Hypervisor Partition
• Hyper-V Hypervisor Virtual Processor
• Hyper-V Legacy Network Adapter
• Hyper-V Virtual IDE controller
• Hyper-V Virtual Storage Device
• Hyper-V WM IO APIC
• Hyper-V VM Remoting
• Hyper-V VM Save, Snapshot, and Restore
• Hyper-V VM Vid Driver
• Hyper-V VM Vid Message Queue
• Hyper-V VM Vid Numa Node
• Hyper-V VM Vid Partition
• Hyper-V VM Worker Process Memory Management

Problem 2

Under the Hyper-V Hypervisor Logical Processor object, the following issues occur:

• The %C1 Time counter and the %C2 Time counter do not report correct data.
• Nine "0" items exist after the %C2 Time counter.
• The following counters are missing:
  • %C3 Time
  • %Guest Run Time
  • %Hypervisor Run Time
  • %Idle Time
  • %Total Run Time
  • C3 Transitions/sec
  • Total Interrupts/sec
• The following counters do not exist in the performance monitor on the Windows Server 2008-based computer, but you see them on the Windows Server 2003 machine performance monitor:
  • Context Switch Time
  • Hypervisor Run Time
  • Processor Halts/sec
  • Total Run Time

Problem 3

Under the Hyper-V Hypervisor Root Virtual Processor object, the following issues occur:

• Twenty-five "0" items are listed as counters before the real counters begin in the list.
• The following counters are missing:
  • %Guest Run Time
  • %Hypervisor Run Time
  • %Total Run Time
• The following counters do not exist in the performance monitor on the Windows Server 2008-based computer, but you see them on the Windows Server 2003 machine performance monitor:
  • Hypervisor Run Time
  • Total Run Time

The way performance monitor determines base counters is incorrect, which causes dependent counters not to show up.

Note If the provider is not running on Windows Server 2008, you will not see the performance object on the remote performance monitor that is running on Windows Server 2003 even though the object is displayed in the performance monitor in Windows Server 2008. This is by design.

For example, the "Hyper-V Virtual Storage Device" object shows up in the performance monitor in Windows Server 2008. However, when you select the counters, they aren't added. This is because a SCSI Controller is not installed with a disk. Therefore, the counters do not show up on the remote computer that is running Windows Server 2003.

A hotfix is available to resolve this problem. You need to install this hotfix on the Windows Server 2008-based computer that has the Hyper-V role enabled.

Hotfix information for Windows Server 2008

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the �Hotfix Request� page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, the computer must run Windows Server 2008. Also, the Hyper-V role must be enabled

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2008 file information note

The .manifest files and the .mum files that are installed in each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. These files and their associated .cat (security catalog) files are critical to maintaining the state of the updated component. The .cat files are signed with a Microsoft digital signature. The attributes of these security files are not listed.

Windows Server 2008, x64-based version

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Additional file information for Windows Server 2008 and for Windows Vista

Additional files for all supported x64-based versions of Windows Server 2008

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: