In linux the default priority for any given user-initiated process is 0.  Which
means that when I run povray, its cpu priority is dead last.  I've gotten in the
habit of running sudo top alongside so that I can renice the process to -20, but
this only affects the main thread as far as I can tell.  All child threads have
a priority of 0.

Is there a way to configure linux so that povray and all of its child threads
are given top priority?

Regards,
A.D.B.

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