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 1770231
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
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https://bugs.launchpad.net/bugs/1770231
Title:
Expose arm64 CPU topology to userspace
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
Applications, particularly those in the HPC domain (e.g. openmpi), can be
optimized for the processor and cache topology. However, the ARM CPU topology
isn't correctly exposed to userspace.
[Fix]
The ACPI 6.2 specification introduced a Processor Properties Topology Table
(PPTT). The linux kernel needs support for parsing this table, and exposing the
parsed topology to userspace. This is currently a work-in-progress upstream.
[Test Case]
TBD
[Regression Risk]
TBD
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