Is there a fix for Windows 2025 Server to show CPU load of HyperV VM

Question

As lot of people found out - there is a bug in Windows Server 2025. Even if a VM is under full load - the Hyper-V does allways shos 0% CPU. Result (seems to be) that the CPU stay in slow GHz - witch ist not what one can expect from a Server.
I verified with HPE 2 XENON Gold 512GB RAM.

Answer 1

Hi Oliver Fendt,

Thanks for your post. Please try the following methods and see if the CPU utilization can come to normal.

1. Install the latest VM integration services: This can significantly reduce CPU overhead for I/O compared to emulated devices and improve the I/O throughput.
2. Check for high CPU utilization issues: If you start one VM and then another, the second VM might face high CPU utilization. This could be due to the configuration or resource allocation.
3. Update VM Integration Services: Ensure you have the latest version installed for performance and compatibility improvements.
4. Consider VM performance tuning guidelines: There are specific configurations and settings that can be adjusted to optimize VM performance.
5. Check for malware: Perform a scan to rule out any malicious software causing high CPU usage.
6. Update drivers: Make sure that the drivers on both the VM and the host are up to date.
7. Configure CPU resources: Hyper-V allows you to statically partition CPU resources on a host and isolate the root OS activity to a subset of logical processors.
8. Additionally, you may want to review the Hyper-V processor performance considerations for fine-tuning and improving Hyper-V performance.

Hyper-V processor performance | Microsoft Learn

Best Regards,

Ian Xue

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