Ubuntu
linux package

change CONFIG_PERF_EVENTS_AMD_UNCORE from m to y

Bug #2033416 reported by Jeff Lane 
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

Ubuntu currently sets CONFIG_PERF_EVENTS_AMD_UNCORE=m for distro kernels.

However, unlike plug and play devices, there is no way to load uncore module when user tries to use uncore event.
Also, a primary motivation to add module support in uncore driver was to ease development (https://git.kernel.org/torvalds/c/05485745ad482).

So, ask ubuntu to switch to CONFIG_PERF_EVENTS_AMD_UNCORE=y.

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 2033416

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
Revision history for this message
Jeff Lane  (bladernr) wrote :

Logs not needed for this, it's a feature request for Mantic

Changed in linux (Ubuntu):
status: Incomplete → New
status: New → Confirmed
Revision history for this message
Zixian Cai (caizixian) wrote :

Yes, perf events are often used in performance analysis. Without loading the module, uncore events, such as `amd_l3`, are missing from perf list.

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