For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Noyan_137135's avatar
Noyan_137135
Icon for Nimbostratus rankNimbostratus
Mar 07, 2014

High CPU Guard

Hi all, I have a question about CPU mechanism of F5 devices. Is there any guard system or something for preventing very high usages of CPU caused by typically high connection requests? For example if...
application delivery
availability
LTM
management
TMOS
Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Mar 07, 2014

Nothing AFAIK...

 

A quick check... Although the CFS (Completely fair Scheduler) is available from kernel 2.6.23 and supposed be the default nowadays... BigIP v11.5.0 uses 2.6.32... Quite old... I think 2.6.38 was out in 2010, but that doesn't take into account RedHats fiddling with various patches, they might have updated the CFQ to latest code).

 

However, from a quick look into /sys/fs, it's not used to group any processes... (I'd expect to see a directory /sys/fs/cgroup IIRC if it were).

 

H