Bug ID 1126805: TMM CPU usage statistics may show a lower than expected value on Virtual Edition

Last Modified: Mar 30, 2024

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

Known Affected Versions:,, 14.1.5,,,,,, 15.1.8,,,,,,,,

Fixed In:
17.1.0, 16.1.4, 15.1.9

Opened: Jul 15, 2022

Severity: 3-Major


The self-reported CPU statistics of TMM may show a usage value that is lower than the expected number. Some TMM threads may show lower CPU usage than others even if the threads are processing the same amount of traffic. When this issue occurs, a high number of idle polls are observed in the tmm_stat table for the affected TMM.


TMM CPU stats may not be accurate.


Virtual Edition



Fix Information

The cpu stats are now accurate.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips