Bug ID 908001: vCMP guest CPU usage may increase 4-5% after upgrade of vCMP host to v16.1.x

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP Install/Upgrade(all modules)

Known Affected Versions:
16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 17.0.0, 17.0.0.1, 17.0.0.2

Opened: May 10, 2020
Severity: 2-Critical
Related Article:
K05902278

Symptoms

All vCMP guest configurations might see a 4-5% increase in CPU usage while running on VIPRION and iSeries platforms with the vCMP host upgraded to v16.1.x

Impact

Increase of CPU usage of about 4-5% on the vCMP guest. This is not expected to cause noticeable performance impacts unless the vCMP guest CPU is already close to 100% use, when it is possible there may be up to a 15% TPS decrease. If you are running vCMP on VIPRION and iSeries platforms, first evaluate your scenarios and capacity plan if you plan to upgrade the 'host' to 16.1.x. Note: There is no CPU usage increase when v16.1.x 'guest' instances are run on an earlier 'host' version. Guidance: In determining whether to upgrade the vCMP host to v16.1.x, carefully evaluate the performance and sizing requirements of your specific configuration.

Conditions

-- All configurations (guest software version is not relevant) -- Running vCMP on VIPRION and iSeries platforms -- 'Host' upgraded to v16.1.x

Workaround

None

Fix Information

None

Behavior Change