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  1. JDK
  2. JDK-8221847

Shenandoah: Make Traversal GC also use SATB

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    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Won't Fix
    • Affects Version/s: 11-shenandoah, 12, 13
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Subcomponent:
      gc
    • CPU:
      x86_64, aarch64
    • OS:
      generic

      Description

      Currently, Shenandoah's Traversal GC mode is using a modified incremental-update algorithm for concurrent traversal. This requires a lot of code generated specifically for this mode (all the special barriers). Recent experiments have shown that SATB is actually more effective than this, and switching to SATB leads to a much more streamlined codebase and clearer algorithm. It'll also make it easier to eventually backport Traversal GC.

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            Assignee:
            rkennke Roman Kennke
            Reporter:
            rkennke Roman Kennke
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              Created:
              Updated:
              Resolved: