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[Tim Whisonant <2055844@xxxxxxxxxxxxxxxxxx>]

Seen on jammy:linux-gkeop 5.15.0-1057.64 during s2024.10.28

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https://bugs.launchpad.net/bugs/2055844

Title:
  timers:inconsistency-check from ubuntu_kernel_selftests flaky on AWS /
  Azure cloud

Status in ubuntu-kernel-tests:
  New

Bug description:
  Back in s2023.10.30 and 2024.01.08 I noticed that we're having some
  timers:inconsistency-check failure in ubuntu_kernel_selftests with AWS
  / Azure cloud instances (M-aws a1.medium, c3.xlarge, c5n.large.
  L-azure Standard_A2_v2, Standard_D4_v4. J-azure Standard_D4_v4,
  Standard_D4s_v3-gen2)

  It appears to be flaky, retest can make them pass.

  The 6th (CLOCK_REALTIME_COARSE) or the 7th (CLOCK_MONOTONIC_COARSE)
  test case will fail with small delta.

  Test log:
   Running 'make run_tests -C timers TEST_PROGS=inconsistency-check TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
   make: Entering directory '/home/azure/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/timers'
   TAP version 13
   1..1
   # selftests: timers: inconsistency-check
   # Consistent CLOCK_REALTIME                 [OK]
   # Consistent CLOCK_MONOTONIC                [OK]
   # Consistent CLOCK_PROCESS_CPUTIME_ID       [OK]
   # Consistent CLOCK_THREAD_CPUTIME_ID        [OK]
   # Consistent CLOCK_MONOTONIC_RAW            [OK]
   # Consistent CLOCK_REALTIME_COARSE          Fri Mar  1 15:29:21 2024
   #
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # 1709306969:543644941
   # --------------------
   # 1709306969:543644941
   # 1709306969:543644933
   # --------------------
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # 1709306969:543644933
   # Delta: 8 ns
   # Fri Mar  1 15:29:29 2024
   #
   # [FAILED]
   # # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0
   not ok 1 selftests: timers: inconsistency-check # exit=1

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