Am 12/9/19 8:20 PM, also sprach jr:

> alias nicepov='nice -n 19 povray'
> 
just fyi, "nice" really doesn't do anything, at least not since the 
invention of multicore CPUs.  The scheduler just picks stuff and goes.

This is an improvement, over where for several years cores could remain 
idle with tasks pending.  Say you've got a normal priority task running 
one thread. It gets dispatched and since there are no other normal 
priority tasks pending, the scheduler is done, even though there are 3 
idle cores and several "low" priority tasks pending.

There is a compile in replacement for the scheduler that fixes the 
current behavior, but the author recommends not using it and waiting for 
his new scheduler, which hopefully Linus will accept into the kernel.

I got no answers to this question
https://askubuntu.com/questions/1180605/priority-trouble-with-nice-renice
but further research led me to the statements above.

-- 
dik
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