Bug ID 479471: CPU statistics reported by the tmstat command may spike or go negative

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1, 12.1.5

Opened: Sep 16, 2014
Severity: 4-Minor
Related Article:


On bladed systems, the results from the 'tmstat' and 'tmstat cpu' commands may spike high or go negative due to a issue with how per-blade statistics are collected.


Incorrect display of CPU statistics.


Error in the timing of statistics collection such that display is incorrect.


There is no workaround.

Fix Information

The CPU statistics display has been fixed.

Behavior Change