Re: nvmm users - experience

[David Brownlee <abs%absd.org@localhost>]

On Sun, 21 May 2023 at 15:01, Mathew, Cherry G.* <c%bow.st@localhost> wrote:
>
> Hello,
>
> I'm wondering if there are any nvmm(4) users out there - I'd like to
> understand what your user experience is - expecially for multiple VMs
> running simultaneously.
>
> Specifically, I'd like to understand if nvmm based qemu VMs have
> interactive "jitter" or any such scheduling related effects.
>
> I tried 10.0_BETA with nvmm and it was unusable for 3guests that I
> migrated from XEN, so I had to fall back.
>
> Just looking for experiences from any users of nvmm(4) on NetBSD (any
> version, including -current is fine).

Another (pretty vanilla) use case. I'm using nvmm on two NetBSD/amd64
10_BETA boxes - a laptop and an HP Microserver.

Both cases run a single Ubuntu VM to run java code which links to
native machine learning libraries.

I did have the HP Microserver setup under 9.x running multiple VMs,
with the qemu monitor hooked up to a per VM file to make it easy to
shutdown and reboot, but I've not bothered with that after the upgrade
as its not been needed.

I migrated the HP Microserver from xen under NetBSD-9 as it would hang
occasionally and not reboot cleanly, issues that went away with nvmm

David