Bug ID 710666: VE with interface(s) marked down may report high cpu usage

Last Modified: Jun 20, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP VE(all modules)

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5

Fixed In:
14.1.0, 13.1.1.4

Opened: Mar 17, 2018
Severity: 3-Major

Symptoms

The "tmm" process may appear to be running at 90% or above in linux cpu reporting utilities such as "top" or "ps", even if the system is not handling a large amount of traffic. In this case, "tmsh show sys tmm-info" continues to report tmm's cpu usage accurately.

Impact

tmm consumes cpu cycles even when idle. This may impact other guests running on the same hardware if the hypervisor has oversubscribed its cpu resources.

Conditions

- BIG-IP Virtual Edition - One or more interfaces configured and used in the BIG-IP configuration is marked down

Workaround

Disable any interface that is currently marked down. For example: tmsh modify net interface 1.1 disabled and then restart tmm: bigstart restart tmm

Fix Information

None

Behavior Change