Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8030815

Code roots are not accounted for in region prediction

    XMLWordPrintable

Details

    • gc
    • b16

    Description

      In JDK-7145569 per-region code root remembered sets were introduced.

      However these per-region remembered sets are not accounted for in the region prediction.

      I.e. G1CollectorPolicy::predict_region_elapsed_time_ms() does not take code roots into account.

      This negatively affects pause time prediction performance

      Attachments

        Issue Links

          is blocked by

          Enhancement - null JDK-8315605 G1: Add number of nmethods in code roots scanning statistics

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Enhancement - null JDK-8315848 G1: Rename rs_ prefix to card_rs in analytics

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          relates to

          Enhancement - null JDK-8030157 Serial G1 code root migration phase causes long pauses

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Enhancement - null JDK-7145569 G1: optimize nmethods scanning

          • P3 - Major loss of function.
          • Resolved
          links to

          Commit Commit openjdk/jdk/d0385712

          Review Review openjdk/jdk/15632

          Activity

            People

              tschatzl Thomas Schatzl
              tschatzl Thomas Schatzl
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: