Frequency in Psafe after an OCC reset cycle while using performance governor
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Tim Gardner | ||
Wily |
Fix Released
|
Medium
|
Tim Gardner |
Bug Description
== Comment: #0 - Shilpasri G. Bhat <email address hidden> - 2015-05-08 14:27:37 ==
---Problem Description---
Frequency is not restored on a reset-cycle of OCC which can lead to performance degradation when using performance-
Contact Information = Shilpasri G Bhat / <email address hidden>
---Steps to Reproduce---
1) select performance governor
2) OCC reset cycle
Fix for this is posted to lkml:
https:/
== Comment: #1 - Shilpasri G. Bhat <email address hidden> - 2015-08-03 06:56:15 ==
Fyi ... v4 of the patches which were posted at
https:/
("[PATCH v4 0/6] powernv: cpufreq: Report frequency throttle by OCC")
with the following 6 patches:
cpufreq: powernv: Handle throttling due to Pmax capping at chip level
powerpc/powernv: Add definition of OPAL_MSG_OCC message type
cpufreq: powernv: Register for OCC related opal_message notification
cpufreq: powernv: Call throttle_check() on receiving OCC_THROTTLE
cpufreq: powernv: Report Psafe only if PMSR.psafe_
cpufreq: powernv: Restore cpu frequency to policy->cur on unthrottling
.
... is now accepted upstream as follows:
1) https:/
("cpufreq: powernv: Handle throttling due to Pmax capping at chip level")
.
2) https:/
("powerpc/powernv: Add definition of OPAL_MSG_OCC message type")
.
3) https:/
("cpufreq: powernv: Register for OCC related opal_message notification")
.
4) https:/
("cpufreq: powernv: Call throttle_check() on receiving OCC_THROTTLE")
.
5) https:/
("cpufreq: powernv: Report Psafe only if PMSR.psafe_
.
6) https:/
("cpufreq: powernv: Restore cpu frequency to policy->cur on unthrottling")
tags: | added: architecture-ppc64le bugnameltc-124851 severity-medium targetmilestone-inin1504 |
affects: | ubuntu → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
assignee: | nobody → Taco Screen team (taco-screen-team) |
Changed in linux (Ubuntu): | |
assignee: | Taco Screen team (taco-screen-team) → Canonical Kernel Team (canonical-kernel-team) |
importance: | Undecided → Medium |
status: | New → Triaged |
Changed in linux (Ubuntu Wily): | |
assignee: | Canonical Kernel Team (canonical-kernel-team) → Tim Gardner (timg-tpi) |
status: | Triaged → Fix Committed |
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