Re: Win 11 Pro has high CPU usage on idle in bhyve

On Thu, Apr 17, 2025 at 2:16 AM Marco Orsatti <marco.dmc12@gmail.com> wrote:

> G’day
>
> I installed a windows 11 virtual machine with bhyve on FreeBSD 14.2 x64
> and I always have a very busy CPU even when windows is in Idle.
> I tried different CPU configurations for the VM, but without success.
>
> This is the current configuration (vm-bhyve):
>
> loader="uefi"
> graphics_port="5950"
> graphics="yes"
> graphics_res="1024x768"
> xhci_mouse="yes"
> cpu=8
> cpu_sockets=4
> cpu_cores=2
> #cpu_threads=1
> memory=16G
> ahci_device_limit="8"
> network0_type="virtio-net"
> network0_switch=“firewall"
> disk0_type="ahci-hd"
> disk0_name="/dev/zvol/vm/win11"
> disk0_dev="custom"
> utctime="no"
> bhyve_options="-AP"
>
> The first VM is Windows 11, the second is FreeBSD, the third is Debian,
> and the others are Windows 10:
>
>
>
>
>
> Could it be an incompatibility between windows 11 and my CPU (E5-2690 v4)?
>
> Thanks
>
> Marco


This is a long shot, but Microsoft has admitted that Outlook Classic can
cause Windows to spike CPU use that is significant. THey have no fix and
your problem is likely not this, but it is a possibility. Obviously, if you
don't run Outlook Classic, this is not the problem. You can see the article
at https://www.theregister.com/2025/04/16/classic_outlook_cpu_spike/
-- 
Kevin Oberman, Part time kid herder and retired Network Engineer.
E-mail: rkoberman@gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683