a single core is always 100%

[IcarusFalling]

Hi Everyone,

I have a 2 x 2673 v4 Xeons and proxmox is has been running generally fine ( with a few exceptions). Anyhow, it came to my attention is that there a a specific CPU core that is always near 100%. out of 80 vCPUs this one is persistent. core #4

any idea how can I find which process that is causing this?

I went through the standard list of troubleshooting commands

htop
top
ps -aux | grep -v "0.0 0.0"
sar -P ALL 1 10
ps -Fae | HEAD

and obviously all of those does not tell you which process is causing this. the one thing that I know is that it's a system process as attached in the pictures. it's confirmed because after I turned all the machines it was still 100%

any help would be appreciates

ps. I did not restart the host because I want to understand why is this happening.

 

[pos-sudo]

Hi Everyone,

I have a 2 x 2673 v4 Xeons and proxmox is has been running generally fine ( with a few exceptions). Anyhow, it came to my attention is that there a a specific CPU core that is always near 100%. out of 80 vCPUs this one is persistent. core #4

any idea how can I find which process that is causing this?

I went through the standard list of troubleshooting commands

htop
top
ps -aux | grep -v "0.0 0.0"
sar -P ALL 1 10
ps -Fae | HEAD

and obviously all of those does not tell you which process is causing this. the one thing that I know is that it's a system process as attached in the pictures. it's confirmed because after I turned all the machines it was still 100%

any help would be appreciates

ps. I did not restart the host because I want to understand why is this happening.

Hello,

I was wondering it this could just be load on your server? How many VMs / CTs are you currently running? Maybe there is a stuck process if it’s not the load?

 

[IcarusFalling]

Hello,

I was wondering it this could just be load on your server? How many VMs / CTs are you currently running? Maybe there is a stuck process if it’s not the load?

well, the whole point is to find the magic command that answers that very question

 

[pos-sudo]

well, the whole point is to find the magic command that answers that very question

I see, however I haven’t experience according tot this specific “issue” but what you could try is the following command:

pstack this will print a stack trace of a running process. Maybe you could find some information about the running processes.