------- Comment From vipar...@in.ibm.com 2019-05-17 15:22 EDT-------
We had bugs reported in past also about hwclock not working on P9.
LTC 155321 is one of such bugs. Its likely openBMC issue here.
As per latest comment in bug  155321

========

The issue if already fixed by https://github.com/openbmc/phosphor-time-
manager/commit/25b4ce95f9d0bea33fbf0364e72f304542a19bc5 and it's picked
in OpenBMC at
https://github.com/openbmc/openbmc/commit/7d35280296a118ec2b2e8b8711b6cc65a77f00cb

But the fix changes the "default" setting, if the settings already
exists in BMC, it still takes effect.

So suggest to re-test the issue with a fresh OpenBMC build. It should
already be fixed.

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https://bugs.launchpad.net/bugs/1802233

Title:
  hwclock test failed on Power9 due to 0.x sec differences / time out
  waiting for time change

Status in ubuntu-kernel-tests:
  New
Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  The hwclock test will fail on the Power9 system "baltar" due to a
  <0.02 second difference.

  Traceback (most recent call last):
    File "/home/ubuntu/autotest/client/shared/test.py", line 411, in _exec
      _call_test_function(self.execute, *p_args, **p_dargs)
    File "/home/ubuntu/autotest/client/shared/test.py", line 823, in 
_call_test_function
      return func(*args, **dargs)
    File "/home/ubuntu/autotest/client/shared/test.py", line 291, in execute
      postprocess_profiled_run, args, dargs)
    File "/home/ubuntu/autotest/client/shared/test.py", line 212, in 
_call_run_once
      self.run_once(*args, **dargs)
    File "/home/ubuntu/autotest/client/tests/hwclock/hwclock.py", line 50, in 
run_once
      raise error.TestFail("Failed to set hwclock back to Warthog's birthday. 
Output of hwclock is '%s'" % date)
  TestFail: Failed to set hwclock back to Warthog's birthday. Output of hwclock 
is '2004-10-20 04:09:59.582146+0000'

  Didn't see this on Power8 boxes

  Sometimes it will fail because "time out waiting for time change" on the same 
node:
  $ sudo /sbin/hwclock --set --date "2004/10/20 04:10:00"; sudo /sbin/hwclock
  hwclock: Timed out waiting for time change.

  Workaround for these is to add "sleep 1".

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-38-generic 4.15.0-38.41
  ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
  Uname: Linux 4.15.0-38-generic ppc64le
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Nov  8 03:45 seq
   crw-rw---- 1 root audio 116, 33 Nov  8 03:45 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: ppc64el
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CurrentDmesg:

  Date: Thu Nov  8 06:03:54 2018
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0451:80ff Texas Instruments, Inc.
   Bus 001 Device 004: ID 0557:2419 ATEN International Co., Ltd
   Bus 001 Device 002: ID 0557:7000 ATEN International Co., Ltd Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  PciMultimedia:

  ProcFB: 0 astdrmfb
  ProcKernelCmdLine: root=UUID=acd1a0d7-f6fc-4130-928c-c8b11ad6e4be ro 
console=hvc0
  ProcLoadAvg: 0.31 0.11 0.03 1/1392 5654
  ProcLocks:
   1: POSIX  ADVISORY  WRITE 3544 00:17:582 0 EOF
   2: POSIX  ADVISORY  WRITE 1798 00:17:338 0 EOF
   3: POSIX  ADVISORY  WRITE 3603 00:17:576 0 EOF
   4: FLOCK  ADVISORY  WRITE 3535 00:17:564 0 EOF
   5: FLOCK  ADVISORY  WRITE 4081 00:17:481 0 EOF
  ProcSwaps:
   Filename                             Type            Size    Used    Priority
   /swap.img                               file         8388544 0       -2
  ProcVersion: Linux version 4.15.0-38-generic (buildd@bos02-ppc64el-018) (gcc 
version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #41-Ubuntu SMP Wed Oct 10 10:57:45 UTC 
2018
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-38-generic N/A
   linux-backports-modules-4.15.0-38-generic  N/A
   linux-firmware                             1.173.1
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  VarLogDump_list: total 0
  cpu_cores: Number of cores present = 40
  cpu_coreson: Number of cores online = 40
  cpu_dscr: DSCR is 16
  cpu_freq:
   min: 2.862 GHz (cpu 159)
   max: 2.862 GHz (cpu 1)
   avg: 2.862 GHz
  cpu_runmode:
   Could not retrieve current diagnostics mode,
   No kernel interface to firmware
  cpu_smt: SMT=4

  -- Firmware information on Baltar --
  pnor: P9DSU20190404_IBM_prod_sign.pnor
  bmc: SMT_P9_206.bin

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