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 1782208
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
** Tags added: eoan
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https://bugs.launchpad.net/bugs/1782208
Title:
KVM SnowRidge Adaptive PEBS
Status in linux package in Ubuntu:
Incomplete
Status in qemu package in Ubuntu:
New
Status in xen package in Ubuntu:
New
Bug description:
With the addition of more CPU state information of data, the PEBS(Processor
Event Based Sampling) record size is greatly increased. However, most general
users of PEBS require just the eventingIP and do not require such a large PEBS
record.
Adaptive PEBS provides Software the capability to configure the PEBS records
to capture only the data of interest, keeping the record size compact.
Need modify KVM and Qemu.
Adaptive PEBS (Processor Event Based Sampling) is configurable PEBS records
for only interested data collection from massive PEBS data. It depends on PEBS
via PT. The enabling work includes:
◾Expose this feature and MSR configure bit in guest PEBS driver
◾Save and restore status in vCPU when vm_exit and vm_entry
◾Support both host-guest mode and system mode.
Target Kernel: 5.2
Target Release: 19.10
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