CPU Isolating issues

[alturismo]

Hi, may i think wrong, but currently i see low, small usage on isolated cores while they are not in use

 

thats my cpu pinning, so cores 2/10 up should be off while my VM's (which are assigned there) are off

 

 

now, when they are off i see some small usage all over, 1-3 %

 

 

now when i try to check what is running on them as sample

 

root@AlsServer:~# CORENUM=2
root@AlsServer:~# ps -e -o pid,psr,cpu,cmd | grep -E  "^[[:space:]][[:digit:]]+[[:space:]]+${CORENUM}"
 8681   2   - [kworker/2:2-wg-crypt-vpn]
root@AlsServer:~# CORENUM=3
root@AlsServer:~# ps -e -o pid,psr,cpu,cmd | grep -E  "^[[:space:]][[:digit:]]+[[:space:]]+${CORENUM}"
 7793   3   - [kworker/3:1-wg-crypt-vpn]
root@AlsServer:~# CORENUM=4
root@AlsServer:~# ps -e -o pid,psr,cpu,cmd | grep -E  "^[[:space:]][[:digit:]]+[[:space:]]+${CORENUM}"
root@AlsServer:~# CORENUM=5
root@AlsServer:~# ps -e -o pid,psr,cpu,cmd | grep -E  "^[[:space:]][[:digit:]]+[[:space:]]+${CORENUM}"
 5502   5   - [kworker/5:1H-events_highpri]
root@AlsServer:~# CORENUM=6
root@AlsServer:~# ps -e -o pid,psr,cpu,cmd | grep -E  "^[[:space:]][[:digit:]]+[[:space:]]+${CORENUM}"
 1303   6   - [kworker/6:1-wg-crypt-vpn]
 5501   6   - [kworker/6:1H-events_highpri]
root@AlsServer:~# CORENUM=7
root@AlsServer:~# ps -e -o pid,psr,cpu,cmd | grep -E  "^[[:space:]][[:digit:]]+[[:space:]]+${CORENUM}"
 5500   7   - [kworker/7:1H-events_highpri]
root@AlsServer:~# 

 

and so on ... same on the HT cores which are more likely in use.

 

am i wrong or did i miss something ?

[Vr2Io]

In opposite thinking direction. If I pin some core to VM but those core were isolated. Then why Unraid can control it.

 

So this may be how we understand what isolated means.

[alturismo]

true, of course my VM's are isolated to these cores too ;)

 

 

and im pretty sure before (cant remember when) its been like always 0 % usage on the cores which where not assigned to unraid

[alturismo]

current state, cpu usage i could find on the isolated cores are

 

7300 11 - [kworker/11:1-xfs-conv/nvme1n1p1]

5502   5   - [kworker/5:1H-events_highpri]

8681   2   - [kworker/2:2-wg-crypt-vpn]

 

so the question is, is this normal to see as sample these processes running on isolated cores ?