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[Jürg Häfliger <1751000@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1853797 ***
    https://bugs.launchpad.net/bugs/1853797

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1751000

Title:
  pmu test in kvm-unit-test failed on X-hwe ARM64 system

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  Triaged

Bug description:
  This failure could be found on both Moonshot and Cavium ThunderX ARM64
  systems.

  Steps:
   1. Install necessary packages
   2. git clone --depth=1 https://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
   3. cd kvm-unit-tests; ./configure; make
   4. TESTNAME=pmu TIMEOUT=90s ACCEL= ./arm/run arm/pmu.flat -smp 1

  Result:
  timeout -k 1s --foreground 90s /usr/bin/qemu-system-aarch64 -nodefaults -machine virt,gic-version=host,accel=kvm -cpu host -device virtio-serial-device -device virtconsole,chardev=ctd -chardev testdev,id=ctd -device pci-testdev -display none -serial stdio -kernel arm/pmu.flat -smp 1 # -initrd /tmp/tmp.H8ucGrg46U

  INFO: PMU version: 3
  INFO: pmu: PMU implementer/ID code/counters: 0(" ")/0/0
  FAIL: pmu: Control register
  Read 0 then 0.
  FAIL: pmu: Monotonically increasing cycle count
  instrs : cycles0 cycles1 ...
     4:    0
  cycles not incrementing!
  FAIL: pmu: Cycle/instruction ratio
  SUMMARY: 3 tests, 3 unexpected failures

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.13.0-36-generic 4.13.0-36.40~16.04.1
  ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
  Uname: Linux 4.13.0-36-generic aarch64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: arm64
  Date: Thu Feb 22 08:29:15 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Feb 22 08:24 seq
   crw-rw---- 1 root audio 116, 33 Feb 22 08:24 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: arm64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CurrentDmesg:
   
  DistroRelease: Ubuntu 16.04
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: console=ttyS0,9600n8r ro
  ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
  RelatedPackageVersions:
   linux-restricted-modules-4.13.0-36-generic N/A
   linux-backports-modules-4.13.0-36-generic  N/A
   linux-firmware                             1.157.16
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial uec-images
  Uname: Linux 4.13.0-36-generic aarch64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True

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