niced tasks on SMT system

From: Pavel Machek
Date: Thu Dec 28 2017 - 07:10:30 EST


Ok, so I'm compiling, and I'd like to run a flight simulator.

Flightgear normally does 20fps on my system... kinda low but playable.

I have reniced make -j 5 fo kernel running. Scheduler gives 100% of
one of CPUs to Flightgear (good), but the smt sibling is used by the
compilation, and I'm down to 9 fps. Not good.

Even with single-threaded make, I have 10-13fps.

Is there way to learn which CPUs are SMT siblings?

Is there way to disable SMT during runtime?

Can I do something to improve Flightgear performance and still do

(cesky, pictures)

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