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  1. RHEL Testing
  2. RHELTEST-156

[ RHEL9 ] kernel-rt : TEST-51-Read-backward-ring-buffer FAIL: Unexpected counter

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    • rhel-kernel-tracing-perf

      This issue was originally created at 2024-04-29T09:45:39.199Z as a Gitlab issue:
      https://gitlab.com/redhat/centos-stream/tests/kernel/kernel-tests/-/issues/1909

      1. Snippet of test failure

      ------------------------------------------------------------
      perf_event_attr:
      type 2
      size 128
      config 0xc1

      Unknown macro: { sample_period, sample_freq }

      1
      sample_type IP|TID|TIME|CPU|PERIOD|RAW
      read_format ID
      disabled 1
      mmap 1
      comm 1
      task 1
      sample_id_all 1
      exclude_guest 1
      mmap2 1
      comm_exec 1
      write_backward 1
      ksymbol 1
      bpf_event 1
      ------------------------------------------------------------
      sys_perf_event_open: pid 45028 cpu -1 group_fd -1 flags 0x8 = 3
      mmap size 1052672B
      0x5571fab74dc8: mmap mask[0]:
      Unexpected counter: sample_count=110, comm_count=111
      ---- end ----
      Read backward ring buffer: FAILED!
      FAILED – 51: Read backward ring buffer

      1. Test logs on DataWarehouse

      https://datawarehouse.cki-project.org/kcidb/tests/12190472

      1. Additional details

      Issue encountered twice on 2 x consecutive RHEL90z RT builds on baremetal :

      https://datawarehouse.cki-project.org/kcidb/tests/12151708

      https://datawarehouse.cki-project.org/kcidb/tests/12190472

      Only reference is :

      https://issues.redhat.com/browse/RHELPLAN-166448 , it was treated as a one time event.

              rhn-support-qzhao Qiao Zhao
              rhn-support-rbergant Roberto Bergantinos Corpas
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                Created:
                Updated: