HWE Next

[ADL] ITBM support for Hybrid platforms

Bug #1952007 reported by Alex Hung
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
New
Undecided
Jian Hui Lee
linux (Ubuntu)
Triaged
Undecided
Unassigned

Bug Description

[Impact]

Need ITBM support for Hybrid platforms. Need to change the scheduling order from Core, HT, ATOM to Core, ATOM, HT.

When using ITBM on systems that has a mixture of CPUs supporting Hyper-Threading and others not supporting it (even offlining HT siblings may cause the issue to be reproducible). Hybrid topologies meet the aforementioned condition. In such cases, threads will be consolidated on CPUs of high priority using got HT siblings, while CPUs of medium priority will remain idle.
https://projectacrn.org/

[Fix]

Intel provides a list of patches to enable AlderLake

[Test]

This is requested by Intel.

[Where problems could occur]

Only applicable on Intel AlderLake. Further testing will be required.

Alex Hung (alexhung)
tags: added: intel oem-priority originate-from-1943549
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote : Missing required logs.

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1952007

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Anthony Wong (anthonywong)
Changed in linux (Ubuntu):
assignee: nobody → Alex Hung (alexhung)
status: Incomplete → Triaged
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

This bug is awaiting verification that the linux-intel-iotg-5.15/5.15.0-1002.4~20.04.2 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

tags: added: verification-needed-focal
Alex Hung (alexhung)
tags: added: verification-done-focal
removed: verification-needed-focal
Alex Hung (alexhung)
Changed in linux (Ubuntu):
assignee: Alex Hung (alexhung) → nobody
Timo Aaltonen (tjaalton)
Changed in hwe-next:
assignee: nobody → Jian Hui Lee (jianhuilee)
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