gc(tenuring): the survival-rate lock latches S=1 only on steady-state evidence, never from the startup cohort - #9949

Draft

proggeramlug wants to merge 7 commits into

PerryTS:mainfrom

proggeramlug:perf/tenuring-evidence-lock

Commits on Sep 7, 2026

fix(gc): the tenuring occupancy rule may not claim promote-on-first-copy (#9851)
Ralph Küpper
committed
925ceb2
fix(gc): the survival-rate lock rates one fresh cohort, not the whole survivor space
Ralph Küpper
committed
c154ba6
fix(gc): the occupancy rule may not claim the CEILING before any round is measured
Ralph Küpper
committed
481e941
test(gc): pin the tenuring threshold the tests exercise; power-on is the floor

proggeramlug
authored and
Ralph Küpper
committed
939187c
chore(gc): classify the tenuring-lock holders for the root-holder gate
Ralph Küpper
committed
9c85be5
fix(gc): require steady evidence before tenuring locks
Ralph Küpper
committed
798c22f
docs: report tenuring evidence-lock implementation
Ralph Küpper
committed
a771c33