Bug ID 876249: Top command shows tmm 0.0% CPU usage under load

Last Modified: Apr 29, 2023

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,, 15.0.0, 15.0.1,,,,

Opened: Feb 03, 2020

Severity: 4-Minor


On BIG-IP Virtual Edition (VE) running in KVM, the 'top' command shows tmm as having 0.0% CPU usage. This is a Red Hat known issue and has been fixed under the RHEL7.5 kernel.


Top command shows inaccurate CPU usage


-- BIG-IP KVM VE with NIC provisioned from OVS-DPDK bridge (Physical Intel 82599 10G NIC). -- Looking at tmm CPU usage via the top command.



Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips