Bug ID 652840: vCMP host avrd high CPU usage

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0

Opened: Mar 22, 2017
Severity: 3-Major

Symptoms

With high vCMP guest counts, the avrd shows sustained ~90% CPU usage on the HOST primary blade.

Impact

The avrd will compete with the control plane threads on the guest that share the same core. The guest dataplane runs at higher priority and not impacted. The avrd maintains a database of statistics available via the UI and 'tmsh show analytics vcmp ...'. When avrd is stopped, these statistics will not be available.

Conditions

For example, 48 guests on B4300 8-blade P8, or 96 guests on B4450 8-blade P8.

Workaround

Run the following commands on the HOSTprimary blade: clsh bigstart stop avrd clsh bigstart disable avrd

Fix Information

The avrd no longer shows sustained ~90% CPU usage on the HOST primary blade with high vCMP guest counts.

Behavior Change