Running second VM extremely slow

[Ariloum]

Hello fellow unraiders, looks like I need some help discovering one strange behave.

 

I got 2 VM's installed:

1. Windows 10, runs at 12 cores, 16Gb memory.

2. Debian 12.6, runs at 4 cores, 4Gb memory.

Both installed on fast cache SSD, both has selected it's own logical CPU cores.

 

If started alone they both runs smooth and fast.

 

But If I got Windows VM running, starting Debian takes almost endless amounts of time (15-20+ mins) and everything goes very slow with it, I'm getting error messages in console while it loading about locking cpu by timeout and so on.

 

If I turn down Windows VM then Debian start working normally, but if I launch Windows VM after that - Debian goes laggy again - if I start some application like Firefox Debian start using 2-4 of it's cores at 100% and it takes a few minutes to launch it.

 

I have another Debian12 in docker and it runs fine in parallel (I got it turned off while encountering this issue).

 

What could be source of this? I though I could run VM's normally even on same cores..

[Ariloum]

Here is both VM's xml configurations attached

debian.txt windows.txt

[Ariloum]

Same stucking happens with Ubuntu 22.04 LTS.

Meanwhile Ubuntu 24 works fine, but it has too high python version  - 3.12 - I need 3.10 for some project that runs in docker.

 

Why did I have to bruteforce linux distros with the Unraid? I though that VM is basic function that must work out of the box.

Edited August 6 by Ariloum

[Ariloum]

I found that if I turn off virtualization support on Windows VM then Ubuntu22 VM getting to work fine in parallel,

while Debian12 is still stucked.

 

Idk what to think, is it a kind of Unraid bugs? If so should I report it somehow else than here?

[SimonF]

1 hour ago, Ariloum said:

I found that if I turn off virtualization support on Windows VM then Ubuntu22 VM getting to work fine in parallel,

while Debian12 is still stucked.

 

Idk what to think, is it a kind of Unraid bugs? If so should I report it somehow else than here?

Not sure if your cpu is split into numa nodes. Maybe look to see where the store is inrelation to the cpu cores.

[Ariloum]

5 hours ago, SimonF said:

Not sure if your cpu is split into numa nodes. Maybe look to see where the store is inrelation to the cpu cores.

I got single cpu system, there is only 1 numa node