Re: bhyve performance issues

some more infos:

Shutting down "windows" results in the host being responsive for a
longer period of time, however, at some point htop shows ~60% cpu usage
of "linux" and load average is ~40.
The ssh connection becomes unusable, showing keystrokes/characters
roughly 10-30 seconds delayed.


On 19.12.24 14:48, infoomatic wrote:
> Hi,
>
> I have a FreeBSD 14.2 system with two bhyve machines (using vm-bhyve).
> Those VMs are completely unrelated: one is a Linux VM for podman builds
> - "linux", one is a Windows 10 VM for Microsoft365 backup - "windows".
>
> Whenever I start a build process on "linux" (2 cpus out of 6), the host
> system becomes barely usable, with a load average of 40-60. The strange
> thing is htop shows me cpu usage of "linux" at 20-30% whereas "windows"
> (which is just idling around) starts using roughly ~45% cpu (normally <
> 10%).
>
> Infos: the host: CPU: AMD Ryzen 5 3600 6-Core Processor, 64GB RAM, 4
> slow spinning disks (zfs: striped mirror).
>
> windows vm config:
> loader="uefi"
> cpu_sockets=1
> cpu_cores=4
> cpu=4
> memory=20480M
> network0_type="virtio-net"
> network0_switch="public"
> disk0_type="virtio-blk"
> disk0_name="disk0.img"
> uuid="30c90d9a-be0f-11ef-a78a-b42e99a1b9c3"
> network0_mac="58:9c:fc:0b:a3:ff"
> graphics="yes"
> xhci_mouse="yes"
> graphics_listen="127.0.0.1"
> graphics_port="591"
> graphics_vga=io
> utctime="no"
>
> linux.cfg:
> loader="uefi"
> cpu=2
> memory=4096M
> network0_type="virtio-net"
> network0_switch="public"
> disk0_type="virtio-blk"
> disk0_name="disk0.img"
> uuid="5307ee72-be0f-11ef-a78a-b42e99a1b9c3"
> network0_mac="58:9c:fc:a7:7b:ef"
> graphics="yes"
> graphics_listen="127.0.0.1"
> graphics_port="5901"
> graphics_vga=io
>
> Anyone an idea what could be wrong, or, how to debug this? Thanks!
>
> Regards,
> Robert
>
>