How to use multi cpu when use Ultrasim?

[knights]

Hi guys, I am using Ultrasim to run the top circuit simulation. And I want to use
multi-cpu to speed up the simulation. Just like spectre, I can use multi-threading
option to use multi cpu,how can I set this option in Ultrasim?
Thanks in advance.

 

[knights]

Ckecked the user manual, no option about this was found.
......

 

[refunok]

also want to know...