JDK-8222766 : Shenandoah: streamline post-LRB CAS barrier (x86)
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 8-shenandoah,11-shenandoah,12,13,14
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2019-04-19
  • Updated: 2019-10-31
  • Resolved: 2019-10-24
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JDK 14
14 b21Fixed
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JDK-8237011 :  
After LRB switched Shenandoah to strong to-space invariant, we can simplify CAS handling logic a bit. Notably, we can avoid the retry loop that was needed due to from-space ptrs potentially stored in memory.
URL: https://hg.openjdk.java.net/jdk/jdk/rev/6a147ac7a68f User: shade Date: 2019-10-24 17:42:25 +0000

Another update that fixes a subtle bug in fixup sequence: http://cr.openjdk.java.net/~shade/8222766/webrev.04/

Updated for current jdk/jdk: http://cr.openjdk.java.net/~shade/8222766/webrev.03/

RFR: https://mail.openjdk.java.net/pipermail/shenandoah-dev/2019-April/009394.html

Trial x86_64 version, passes hotspot_gc_shenandoah: http://cr.openjdk.java.net/~shade/8222766/webrev.01/