Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8191471

Elastic TLABs for G1

    XMLWordPrintable

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 11
    • Component/s: hotspot
    • Subcomponent:
      gc
    • Resolved In Build:
      b12

      Description

      G1 may waste a serious amount of space during TLAB allocation because of the many region boundaries.

      I.e. since the TLAB size is fixed, G1 will, if TLAB size grows large waste a lot of space at the end of every region, because although the current allocation might fit, the TLAB may not.

      This may waste up to 50% of available memory, causing performance issues.

      Implement elastic TLABs like G1 already does for PLABs.

        Attachments

          Issue Links

            Activity

              People

              Assignee:
              sjohanss Stefan Johansson
              Reporter:
              tschatzl Thomas Schatzl
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: