I had a bash process in a container go haywire and consume 100% of a
core yesterday. It made me think:
Is there a way to cap the AMOUNT of CPU a container can use?
I realize I can assign a container to a specific subset of cores
(cpuset), and change how free CPU is divvied up between containers
(cpu.shares), but I can't see any way to say something like
This container can use AT MOST 80% of any given core.
This container can use AT MOST 4 cores (concurrently).
I'm using a scaling governor, so my CPUs will use less power and
generate less heat when they're idling. I don't want a haywire
container to be able to consume 100% of free compute time, because
that'll push all cores back to their highest clock (and thus increase my
power and cooling bill).
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