Bug ID 1144005: TPS drop of ~14% from F5OS-A 1.1.0 and later on r10000 series platforms

Last Modified: Dec 28, 2023

Affected Product(s):
F5OS LTM(all modules)

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1

Opened: Aug 29, 2022

Severity: 1-Blocking

Symptoms

A TPS drop of approximately 12-14% was observed when running 512KB L7 HTTP tests on r10000 series platforms. Increased CPU usage, and larger tcp_lro receive packet sizes and some packet drops were observed when it is running with full capacity.

Impact

If F5OS software is upgraded from F5OS-A 1.0.0 to any later version, including F5OS-A 1.1.0, there will a maximum drop of 14% in TPS from device actually supported in F5OS-A 1.0.0.

Conditions

Upgrading F5OS-A software version from 1.0.0 to a later software version.

Workaround

No mitigation currently available.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips