kernel-packages team mailing list archive

[Launchpad Bug Tracker <1452547@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug:

== Comment: #0 - Shilpasri G. Bhat <shigbhat@xxxxxxxxxx> - 2015-05-06 07:24:11 ==
The user can see a drop in performance when frequency is throttled and
is unaware of throttling. So detect and report such a condition, so
the user can check the OCC status to reboot the system or check for
power supply or fan failures.
    
The cpu frequency can be throttled by OCC for the following reasons:
1)If a processor crosses its power and temperature limit then OCC will
lower its Pmax to reduce the frequency and voltage.
2)If OCC crashes then the system is forced to Psafe frequency.
3)If OCC fails to recover then the kernel is not allowed to do any
 further frequency changes and the chip will remain in Psafe.
    
This bug is fixed upstream 09a972d1620934142d30cfda455ffe429af751c4

---uname output---
3.19.0-15
 
Machine Type = llmtul02b.in.ibm.com 
 
Contact Information = Shilpasri G Bhat / shilpa.bhat@xxxxxxxxxxxxxxxxxx

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bot-comment bugnameltc-124690 severity-medium targetmilestone-inin1504
-- 
Report cpu frequency throttling
https://bugs.launchpad.net/bugs/1452547
You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.