> Or is the "timing issue" you talk about more related to unpredictable
> latencies due to the way the SW virtualisation works?

Yes, it is all about latencies and meeting deadlines. This is probably
why the application is DOS after all.

> What about emulation? Do you think emulation would be more predictable?

No difference as long as there is a multi-tasking OS in the background.
Yes, the RT patchset might help...