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Actor runtime: preemption (slices + isolates) and nodes (actors.t27 sections 8 and 9) #1703
Description
Why
Owner, 2026-10-09: there is no distribution across machines and no BEAM-style preemption; improve both. The spec is gHashTag/t27 specs/queen/actors.t27 sections 8 and 9 (gHashTag/t27#7900, PR gHashTag/t27#7901).
Acceptance criteria
- The runtime yields to timers and I/O after each slice (
slice_spent). A 0 ms timer runs during a 200 000-turn message chain, not after it. - An
isolatedturn runs in an OS thread or an OS process, asturn_isolationdecides. A process kill really stops the work (SIGKILL). A thread kill is reported as abandoning only, because a terminated worker thread was measured still running. - A pid names its node. Send, monitor, exit and spawn cross nodes over a NodeLink. A node whose lease lapses gives X_NOCONNECTION to every monitor across it, and
remoteChildrestarts on the roomiest node that is up (place_before). - The tests and the printed numbers are in
tests/api/queen-actors-dist.test.ts.
Activity
feat(queen): nodes on different machines - a PostgreSQL link, the sto…
chore(queen): PIN names t27#7907, the PR that lands sections 8 and 9 …
feat(queen): preemption in two halves and nodes - the actor runtime p…
feat(queen): nodes on different machines - a PostgreSQL link, the sto…
chore(queen): PIN names t27#7907, the PR that lands sections 8 and 9 …
feat(queen): preemption (slices + isolates) and nodes - actor runtime…
feat(queen): preemption in two halves and nodes - the actor runtime p…
feat(queen): nodes on different machines - a PostgreSQL link, the sto…
chore(queen): PIN names t27#7907, the PR that lands sections 8 and 9 …
dmitrii-f-t27 commentedon Oct 11, 2026
Done on
queen: 4811a2a (squash of PR #1704). Checked at queen 9cfb52b:tests/api/queen-actors-dist.test.tscovers sections 8 and 9: a 0 ms timer during 200 000 turns, thread vs process kill (SIGKILL), a pid that names its node, cross-node send and monitor, noconnection after the node lease lapses, and placement on the roomiest node.queenbase).Closed by hand: a PR into
queendoes not auto-close issues.Dmitrii Fedorov (@dmitrii-f-t27)