$ oc version
Client Version: 4.13.9
Kustomize Version: v4.5.7
Server Version: 4.13.9
Kubernetes Version: v1.26.6+6bf3f75 

$ oc get node -owide
NAME                                      STATUS   ROLES                         AGE     VERSION           INTERNAL-IP    EXTERNAL-IP   OS-IMAGE                                                       KERNEL-VERSION                          CONTAINER-RUNTIME
hp-dl380g10-06.rhts.eng.pek2.redhat.com   Ready    control-plane,master,worker   6d16h   v1.26.6+6bf3f75   10.73.116.28   <none>        Red Hat Enterprise Linux CoreOS 413.92.202308091852-0 (Plow)   5.14.0-284.25.1.rt14.310.el9_2.x86_64   cri-o://1.26.4-3.rhaos4.13.git615a02c.el9

# cat /proc/cmdline 
BOOT_IMAGE=(hd0,gpt3)/ostree/rhcos-73c3b16bec5c7779c38176ad561a895424b65a3b6f65a06017d6027bb2582b1e/vmlinuz-5.14.0-284.25.1.rt14.310.el9_2.x86_64 ignition.platform.id=metal ostree=/ostree/boot.1/rhcos/73c3b16bec5c7779c38176ad561a895424b65a3b6f65a06017d6027bb2582b1e/0 ip=eno1:dhcp root=UUID=c2e875e1-504b-41fd-a5af-65449caa9c5d rw rootflags=prjquota boot=UUID=1f5001d2-1fb8-448e-9321-46a91ae8fab3 systemd.unified_cgroup_hierarchy=0 systemd.legacy_systemd_cgroup_controller=1 skew_tick=1 nohz=on rcu_nocbs=1-9,20-28,11-19,30-38 tuned.non_isolcpus=00000080,20000401 systemd.cpu_affinity=0,10,29,39 intel_iommu=on iommu=pt isolcpus=managed_irq,1-9,20-28,11-19,30-38 nohz_full=1-9,20-28,11-19,30-38 tsc=nowatchdog nosoftlockup nmi_watchdog=0 mce=off rcutree.kthread_prio=11 default_hugepagesz=1G audit=0 processor.max_cstate=1 intel_idle.max_cstate=0 idle=poll intel_pstate=disable 

$ cat /sys/devices/system/cpu/isolated

$ cat /sys/devices/system/cpu/isolated
2-13