[Bug 42738] Annoying flickering in Renegade Ops (needs StrictDrawOrdering= enabled to remove it)

https://bugs.winehq.org/show_bug.cgi?id=42738

--- Comment #2 from Béla Gyebrószki  ---
(In reply to Henri Verbeet from comment #1)
> Does this application use Direct3D from multiple threads? If it does, this
> is a duplicate of the existing "StrictDrawOrdering" bugs, and csmt will be
> the fix for those. It wouldn't be unexpected for this kind of change to make
> such an issue visible where it previously wasn't. If it only uses Direct3D
> from a single thread something else may be going on.

How can I find out if it uses multiple or a single thread for D3D?