Move typed addressable mailboxes (RFC 013 directory rework + RFC 014 typed
addressing/producers/naming/root-exit teardown) into Shipped, with the final
phase's delivered surface enumerated. Retarget Up next to the gen_server
time-related patterns: send_after/cancel_timer substrate + the OTP time idioms
(idle/receive timeout, periodic tick/heartbeat, debounce/backoff) on the v0.8
server loop. Fold the duplicate Later send_after bullet into Up next, and mark
the "app actor blocks AllDone" Look-into as addressed by the root-exit teardown.
- add RFC 013 as the up-next item, sequenced before send_after
- mark process groups shipped (RFC 012, b78311b..56f2fc5)
- note send_after now depends on 013 for Dest; cross-link clustering name-addressing
- Compact v0.9 (Wake-path latency) into Shipped; record the RFC 004 spinning
excision as a deviation (preserved on branch rfc-004-spinning).
- Drop the v0.7 entry, folding its reference into the Shipped history pointer.
- Promote Process groups from Later into the up-next slot v0.9 vacated;
Per-switch cost now leads Later/Highest priority.
The spinning experiment is excised from master. Drops the two dedicated v0.9
sections describing it. Inline RFC-004 mentions in the v0.9 intro and the
queue-topology decision record are intentionally left for a manual short-term
-plan pass.
The terminal-wake fix cannot reach the (deadline, no-io) idle branch:
thread::sleep, no pipe to write. Documented as a Later item with the
two candidate mechanisms (clamped sleep vs condvar/futex), plus the
cross-thread-unpark observation from the same session.
Shootout (6d9f369 harness, 24-core sweep) landed in RFC 005's World 3:
queue variants indistinguishable in rq_runtime; per-wake latency is the
ceiling. Record the queue-topology closure (rq-mutex frozen as default,
benchmark-driven reopening only), define v0.9 as the wake-path latency
cycle (RFC 005 slot -> bench -> RFC 004 spinning workers -> bench +
interaction pass), and add per-switch cost to Later pending a profiling
spike + RFC.
Completed cycles compacted to the two trailing minors (v0.7, v0.8);
earlier history lives in git.
Gotchas now lead with the consuming-wake invariant ('the only wildcard wake
is request_stop') and the obligations it puts on future wakers. Deviations
recorded: the no-park exit's retire_wait/clear_notify (a protocol piece the
plan missed), Drop-guard deregistration superseded by own-pid assert
relaxation, and closed arms being ready forever.
Marks the three v0.6 items done with their hashes and the load-bearing
deviations: two-class lock order replacing the strict leaf rule, the
registry as a bimap with name_of and without send_by_name (no per-pid
mailbox to send to), and call_timeout built on recv_timeout instead of
monitor machinery. Adds the Leaf -> Channel order to the standing
invariants; README module table picks up recv_timeout, call_timeout,
and the registry row.
smarm-agent