Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8057000

Increase parallelism in String deduplication fixup

    Details

    • Type: Enhancement
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: 8u40, 9
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Subcomponent:
      gc

      Description

      In CRM Fuse, string deduplication table fixup takes a significant amount of time (~25-30% of average gc pause time).

      One interesting thing noticed is that only around half of the threads actually do work. This may be due to startup/synchronization taking so long for many threads.

      This is also somewhat similar to the problem described in JDK-8040120.

      One option to fix this is to merge string deduplication work with other parallel tasks in the "Other" group if possible.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                Unassigned
                Reporter:
                tschatzl Thomas Schatzl
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated: