How to use the full-pcpus-only option?

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Cluster information:

Kubernetes version: v1.17.3
Cloud being used: (put bare-metal if not on a public cloud)
Installation method: kubeadm
Host OS: centos 7/8

I want to use the CPUManager options full-pcpus-only
But I don’t know how to activate the
The Doc make me confused
I have activate the statice policy with edit the /var/lib/kubelet/config.yaml
But when I edit the yaml add full-pcpus-only: true
the options doesn’t work

please tell me how to use the options