Generational ZGC - Early Access Builds 3 are now available”

New Early Access builds of Generational ZGC are now available at jdk.java.net/genzgc.

Changes include :

• Rebased on top of jdk-20+21

• Added macOS builds

• Heuristics rewriten to deal with a problematic case where Generational ZGC spent too much focus on doing young generation collection when it’s more beneficial to spend resources to collect the old generation.

• GC logging rewriten to easier see what log lines belong to what collection / generation, plus many additional changes that should make it easier to read and understand GC logs

• Barrier elision enhanced to remove barriers from array access of newly allocated arrays

• Enhanced the generated hs_err crash text file

• Fixed and unified code quality and style

Proper feedback on these EA builds should be sent to the zgc-dev mailing list.