Comment 6 for bug 1782208

No updates/upstream at this time.

-----Original Message-----
From: <email address hidden> [mailto:<email address hidden>] On Behalf Of Christian Ehrhardt ?
Sent: Monday, May 6, 2019 10:29 PM
To: Lai, Paul C <email address hidden>
Subject: [Bug 1782208] Re: KVM SnowRidge Adaptive PEBS

Are there updates and/or references to commits in those projects already that we can use to track and integrate those features?

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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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