[Bug 1960118] Re: [22.04 FEAT] Add new CPU-MF Counters for new IBM Z Hardware - libpfm part

[Launchpad Bug Tracker]

This bug was fixed in the package libpfm4 -
4.11.1+git32-gd0b85fb-1ubuntu0.1

---------------
libpfm4 (4.11.1+git32-gd0b85fb-1ubuntu0.1) jammy; urgency=medium

  * Add d/p/lp-1960118-s390-Update-counter-definition-for-IBM-z16.patch
    to add new CPU-MF counters for new IBM zSystems hardware. (LP: #1960118)

 -- Frank Heimes <frank.heimes at canonical.com>  Mon, 29 Aug 2022 12:39:14
+0200

** Changed in: libpfm4 (Ubuntu Jammy)
       Status: Fix Committed => Fix Released

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Title:
  [22.04 FEAT] Add new CPU-MF Counters for new IBM Z Hardware - libpfm
  part

Status in Ubuntu on IBM z Systems:
  In Progress
Status in libpfm4 package in Ubuntu:
  Fix Released
Status in libpfm4 source package in Jammy:
  Fix Released
Status in libpfm4 source package in Kinetic:
  Fix Released

Bug description:
  SRU Justification:
  ------------------

  [Impact]

   * This is an hardware enablement SRU,
     that adds support for the new IBM zSystems hardware in libpfm4.

   * It's in particular to add new CPU-MF Counters
     for new the IBM z16 hardware.

   * Otherwise z16-specific CPU performance measurement facility
     counters cannot be used with libpfm4.

  [Fix]

   * b03a81 b03a81ea006658b3aa478e22f4d0b7741cf7346f "s390: Update
  counter definition for IBM z16"

  [Test Plan]

   * Since libpfm4 is a library, the best was to test it is with the
     help of a brief test program.

   * Install libpfm4-dev_4.11.1+git32-gd0b85fb-1ubuntu0.1_s390x.deb
     and libpfm4_4.11.1+git32-gd0b85fb-1ubuntu0.1_s390x.deb
     on an IBM z16 system (with hardware counters enabled).
     and navigate to /usr/share/doc/libpfm4-dev/examples/ to find the
     two example programs 'check_events' and 'showevtinfo'
     and build or compile them.

   * Alternatively do this based on the raw project sources:
     git clone git://perfmon2.git.sourceforge.net/gitroot/perfmon2/libpfm4
     cd libpfm4
     make

   * Now run the 'showevtinfo' program (in examples subdirectory)
     to get a list of all available events,
     masks and modifiers that are supported
     and look (grep) for z16 related events
     as they are listed in the commit above.

  [Where problems could occur]

   * There is not much that can go wrong, other than:

   * syntactical errors (will be identified by a test compile)

   * making use of 'LIBPFM_ARRAY_SIZE(cpumcf_z16_counters)' for
     the wrong machine types (but 3931 and 3932 are z16)

   * or someone added/assigned the wrong set of counters for
     the z16 hardware and machine types.

   * A test package was build for all major architectures
     and is available via this PPA:
     https://launchpad.net/~fheimes/+archive/ubuntu/lp1960118

  [Other Info]
   
   * Version libpfm4 4.11.1+git74-g5140ce5 in kinetic has the commit/patch
     already included, since it's a snapshot that was taken after b03a81
     was brought upstream.
  __________

  Add new CPU-MF Counters for new IBM Z Hardware - libpfm part

  Description:
  Add new CPU-MF Counters for new IBM Z Hardware.

  Has a kernel, s390utils/s390-tools and libpfm part.

  Request Type: Package - Update Version
  Upstream Acceptance: In Progress

  ---
  External link: https://warthogs.atlassian.net/browse/PEI-31

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