Docker to limit cpu usage for any number of cpus

Question

I need to run docker container on different VMs with 80% cpu processing time limit. At the same time I don't know how many cpu/cores/threads target VM will have. Docker offers a few arguments to control cpu limits. The most suitalbe for me - cpu-quota. But looks like it's per cpu. For instance I have VM with the following configuration:

CPU(s): 2 On-line CPU(s) list: 0,1 Thread(s) per core: 1 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1

When I set cpu-quota to 80000 (which is 80% of 10K) then it uses just one cpu, not 2 available cpus.

Is there nay way to put 80% cpu limit in a common way to not adjust it for each VM? Literally I need to say "hey, regardless of how many cpus/cores/threads etc you have, pls let this container to use only 80%"? Is it possible? If no, what would be the way to go, put limit for each VMs individually?

Para · Accepted Answer · 2022-10-12 02:50:49Z

as the website say: control cpu limits

--cpu-period means

Specify the CPU CFS scheduler period

--cpu-quota means

Impose a CPU CFS quota on the container. The number of microseconds per --cpu-period that the container is limited to before throttled

if you use --cpu-quota you must use --cpu-period first

--cpus is a more convenient alternative

--cpus 1.6

This is the equivalent of setting --cpu-period="100000" and --cpu-quota="160000"

if you want use all 2 cpus, which uses 80%:

you can use the setting: --cpu-period="80000" and --cpu-quota="200000"

if you want to run same command in every VMs:

--cpu-period="80000" --cpu-quota="$(cat /proc/cpuinfo | grep processor | wc -l)0000"

I didn't get this one --cpu-period="80000" and --cpu-quota="200000" could pls elaborate a bit more? Why quote > period? Am I right that I have to set period & quote per each VM? There is no way to set it just once?
yes, I have to set period & quote per each VM. you can use shell to get the cpu's count aotument, which above the upated answer

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