Details

    • Bug
    • Resolution: Fixed
    • Minor
    • Lustre 2.13.0
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      When doing i/o from multiple writers to a single file, the
      per-file page cache lock (mapping->tree_lock) becomes a
      bottleneck.

      Most current uses are single page at a time. This converts
      one prominent use, marking page as dirty, to use a pagevec.

      This improves shared file write performance notably when
      many threads are writing to one file.

      [NB: Detailed numbers coming. Looks like no change in
      uncontended case, rising to ~25% for 8 writers.]

      Attachments

        Issue Links

          Activity

            [LU-9920] Use pagevec for marking pages dirty
            wshilong Wang Shilong (Inactive) made changes -
            Link New: This issue is related to EX-792 [ EX-792 ]
            sihara Shuichi Ihara made changes -
            Link New: This issue is related to EX-722 [ EX-722 ]
            pjones Peter Jones made changes -
            Fix Version/s New: Lustre 2.13.0 [ 14290 ]
            Resolution New: Fixed [ 1 ]
            Status Original: Reopened [ 4 ] New: Resolved [ 5 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to DDN-867 [ DDN-867 ]
            pfarrell Patrick Farrell (Inactive) made changes -
            Assignee Original: Patrick Farrell [ pfarrell ] New: Dongyang Li [ dongyang ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-12429 [ LU-12429 ]
            pfarrell Patrick Farrell (Inactive) made changes -
            Resolution Original: Won't Do [ 10200 ]
            Status Original: Resolved [ 5 ] New: Reopened [ 4 ]
            pfarrell Patrick Farrell (Inactive) made changes -
            Resolution New: Won't Do [ 10200 ]
            Status Original: Open [ 1 ] New: Resolved [ 5 ]
            pfarrell Patrick Farrell (Inactive) made changes -
            Link Original: This issue is related to LU-9949 [ LU-9949 ]
            pfarrell Patrick Farrell (Inactive) made changes -
            Assignee Original: Patrick Farrell [ paf ] New: Patrick Farrell [ pfarrell ]

            People

              dongyang Dongyang Li
              paf Patrick Farrell (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: