If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix. This hotfix might receive additional testing. Apply this hotfix only to systems that are experiencing the problem described in this article. However, this hotfix is intended to correct only the problem that is described in this article. Resolution Hotfix informationĪ supported hotfix is available from Microsoft. Therefore, the power manager calculates an incorrect idle time for the processor and does not unpark CPU cores correctly. However, Power Manager may read meaningless values because of a hypervisor interception. When Power Manager runs in the Hyper-V root partition, Power Manager reads two variables from a page that is shared with the hypervisor to calculate the idle time of a processor. This issue occurs because Power Manager does not unpark CPU cores correctly. If you open Resource Monitor, Resource Monitor indicates that some CPU cores have a high workload and that other CPU cores are idle in a parked status. However, some CPU cores are idle on the host computer. In this scenario, the CPU usage for the VMs reaches 100 percent. You install the Hyper-V server role on the computer, and then you run some virtual machines (VMs) on the computer. You have a computer that uses a multicore processor and that is running Windows Server 2008 R2.
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