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  1. Lustre
  2. LU-9069

ZFS sanity: FAIL: test_255a Speedup with willread is less than XX%, got YY%

Details

    • Bug
    • Resolution: Unresolved
    • Minor
    • None
    • Lustre 2.10.0
    • onyx-64 thru 67
      Full Group test, RHEL7.3/ZFS
      master branch, b3499
    • 3
    • 9223372036854775807

    Description

      sanity: FAIL: test_255a Speedup with willread is less than XX%, got YY%

      Test is expecting willreads to be faster than cache reads, but willreads are slower:

      From test_log:

      Iter 1/10: cache speedup: 228%
Iter 1/10: ladvise speedup: 24%

Iter 2/10: cache speedup: 147%
Iter 2/10: ladvise speedup: 20%

Iter 3/10: cache speedup: 170%
Iter 3/10: ladvise speedup: 10%

      Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.

      Info required for matching: sanity 255a

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-8565 sanity test 255a fails with ‘Speedup with willread is less than X%, got Y%’

          • Major - Major loss of function.
          • Resolved
          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-6254 Fix OFD/OSD prefetch for osd-ldiskfs and osd-zfs

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. LU-10314 implement ladvise dontneed for ZFS

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open
          mentioned in

          [Whamcloud Community Wiki] Page Page No Confluence page found with the given URL.

          Activity

            [LU-9069] ZFS sanity: FAIL: test_255a Speedup with willread is less than XX%, got YY%
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-10314 [ LU-10314 ]
            adilger Andreas Dilger made changes -
            Description Original: Test is expecting willreads to be faster than cache reads, but willreads are slower:

            From test_log:
            {noformat}
            Iter 1/10: cache speedup: 228%
            Iter 1/10: ladvise speedup: 24%

            Iter 2/10: cache speedup: 147%
            Iter 2/10: ladvise speedup: 20%

            Iter 3/10: cache speedup: 170%
            Iter 3/10: ladvise speedup: 10%
            {noformat}

            Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.

            Info required for matching: sanity 255a             		New: sanity: FAIL: test_255a Speedup with willread is less than XX%, got YY%

            Test is expecting willreads to be faster than cache reads, but willreads are slower:

            From test_log:
            {noformat}
            Iter 1/10: cache speedup: 228%
            Iter 1/10: ladvise speedup: 24%

            Iter 2/10: cache speedup: 147%
            Iter 2/10: ladvise speedup: 20%

            Iter 3/10: cache speedup: 170%
            Iter 3/10: ladvise speedup: 10%
            {noformat}

            Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.

            Info required for matching: sanity 255a
            adilger Andreas Dilger made changes -
            Description Original: Test is expecting willreads to be faster than cache reads, but willreads are slower:

            From test_log:
            {noformat}
            Iter 1/10: cache speedup: 228%
            Iter 1/10: ladvise speedup: 24%

            Iter 2/10: cache speedup: 147%
            Iter 2/10: ladvise speedup: 20%

            Iter 3/10: cache speedup: 170%
            Iter 3/10: ladvise speedup: 10%
            {noformat}

            Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.
            		 New: Test is expecting willreads to be faster than cache reads, but willreads are slower:

            From test_log:
            {noformat}
            Iter 1/10: cache speedup: 228%
            Iter 1/10: ladvise speedup: 24%

            Iter 2/10: cache speedup: 147%
            Iter 2/10: ladvise speedup: 20%

            Iter 3/10: cache speedup: 170%
            Iter 3/10: ladvise speedup: 10%
            {noformat}

            Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.

            Info required for matching: sanity 255a
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-6254 [ LU-6254 ]
            adilger Andreas Dilger made changes -
            Labels Original: zfs New: always_except zfs
            adilger Andreas Dilger made changes -
            Labels New: zfs
            adilger Andreas Dilger made changes -
            Summary Original: sanity: FAIL: test_255a Speedup with willread is less than XX%, got YY% New: ZFS sanity: FAIL: test_255a Speedup with willread is less than XX%, got YY%
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-8565 [ LU-8565 ]
            jcasper James Casper (Inactive) made changes -
            Description Original: Test is expecting willreads to be faster than cache reads, but willreads are slower:

            Iter 1/10: cache speedup: 228%
            Iter 1/10: ladvise speedup: 24%

            Iter 2/10: cache speedup: 147%
            Iter 2/10: ladvise speedup: 20%

            Iter 3/10: cache speedup: 170%
            Iter 3/10: ladvise speedup: 10%

            Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.
            		 New: Test is expecting willreads to be faster than cache reads, but willreads are slower:

            From test_log:
            {noformat}
            Iter 1/10: cache speedup: 228%
            Iter 1/10: ladvise speedup: 24%

            Iter 2/10: cache speedup: 147%
            Iter 2/10: ladvise speedup: 20%

            Iter 3/10: cache speedup: 170%
            Iter 3/10: ladvise speedup: 10%
            {noformat}

            Related to LU-8565, but that issue was attributed to VM slowness. This issue is also seen on physical machines.
            jcasper James Casper (Inactive) made changes -
            Affects Version/s New: Lustre 2.10.0 [ 12204 ]
            Affects Version/s Original: Lustre 2.9.0 [ 11891 ]

            People

              wc-triage WC Triage
              jcasper James Casper (Inactive)
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              Dates

                Created:
                Updated: