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  1. Lustre
  2. LU-6325

CPT bound ptlrpcd's are unimplemented

Details

    • Improvement
    • Resolution: Fixed
    • Minor
    • Lustre 2.8.0
    • None
    • 3
    • 17711

    Description

      ptlrpcd_select_pc() has the comment:

      1. ifdef CFS_CPU_MODE_NUMA
      2. warning "fix this code to use new CPU partition APIs"
      3. endif

      In our own experimentation on large NUMA systems, we found substantial benefits to confining the existing ptlrpcd's to the NUMA node originating IO using the taskset command to set affinity. Unfortunately, this only works for one node at a time.

      To obtain the best case for all nodes, we need to create ptlrpcd's confined to each node and to select ptlrpcd's on the same node.

      We plan to submit a patch against master to complete this.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-6580 Poor read performance with many ptlrpcd threads on the client

          • Major - Major loss of function.
          • Resolved

          Activity

            [LU-6325] CPT bound ptlrpcd's are unimplemented
            pjones Peter Jones made changes -
            Link Original: This issue is related to LDEV-18 [ LDEV-18 ]
            pjones Peter Jones made changes -
            Link New: This issue is related to LDEV-19 [ LDEV-19 ]
            pjones Peter Jones made changes -
            Resolution New: Fixed [ 1 ]
            Status Original: Open [ 1 ] New: Resolved [ 5 ]
            yujian Jian Yu made changes -
            Link New: This issue is related to LDEV-18 [ LDEV-18 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-6580 [ LU-6580 ]
            jlevi Jodi Levi (Inactive) made changes -
            Assignee Original: WC Triage [ wc-triage ] New: Liang Zhen [ liang ]
            pjones Peter Jones made changes -
            Labels New: patch
            adilger Andreas Dilger made changes -
            Issue Type Original: Bug [ 1 ] New: Improvement [ 4 ]
            adilger Andreas Dilger made changes -
            Fix Version/s New: Lustre 2.8.0 [ 11113 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to SGI-83 [ SGI-83 ]
            schamp Stephen Champion created issue -

            People

              liang Liang Zhen (Inactive)
              schamp Stephen Champion
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              Dates

                Created:
                Updated:
                Resolved: