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  1. Lustre
  2. LU-14424

write performance regression in Lustre-2.14.0-RC1

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • Lustre 2.14.0
    • Lustre 2.14.0
    • None
    • 2
    • 9223372036854775807

    Description

      While I was runnng the performance regression tests, a performance regression in Lustre-2.14.0-RC1 was found on the write with 4K transfer size.
      Here is a reproducer and test results.

      # mpirun -np $NP -mca btl_openib_if_include mlx5_1:1 -x UCX_NET_DEVICES=mlx5_1:1 --allow-run-as-root /work/tools/bin/ior -w -r -t 4k -b $((256/NP)) -e -v -F -o /ai400x/ior.out/file
      
      Client Version NP Write(MB/s) Read(MB/s)
      Lustre-2.13.0 1  803  3293
      Lustre-2.14.0-RC1 1  529  3092
      Lustre-2.13.0 16  6962  12021
      Lustre-2.14.0-RC1 16  5127  11951

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              sihara Shuichi Ihara
              sihara Shuichi Ihara
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                Updated:
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