How to start executable with realtime priority?

Question

So I try this on windows 8.1:

start /low cmd

And I get cmd process with low priority. But when I do:

start /realtime cmd

I get new cmd process with high priority.

Is there a way to get realtime without setting it manually? Also, can I somehow set desired priority from the code of my application, maybe WinApi or something?

Answer 1

It works when you are executing start as an administrator.

Technically, you need the SeIncreaseBasePriorityPrivilege, which an administrator normally has. If you don't, it looks like albeit I couldn't find any documentation about that fact, that you are silently reverted to a priority that is still viable with the calling account.

I doubt that Win32 will help, as the same restrictions surely apply.