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Carry the declaring authority with every floor-batch clamp - #8046
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The refusal reported two facts that cannot both be true:
FLOOR-BATCH-OVER-BUDGET batch=1 wall_ms=400540 clamp_ms=360000 units=27
(authority gunbc.ci_spec gunbc_ci_floor_batch_clamp_params[0])
The cited row's overhead is 240 seconds. The 360000 came from
`gunbc.ci_layer_roots` `v1_claim_scoped_witness_batch`, which owns its clamp
and is deliberately excluded from the positional list. Two lanes spent time
reconciling a number against a row that never produced it.
The implementation was predisposed to it: two independently owned populations
were flattened into one aligned `Vec<Option<(u128, u128)>>`, and the printer
reconstructed the origin from the LIST POSITION while spelling `gunbc.ci_spec`
in its format string. That is validation standing where construction was
available — the citation could stay green while the value it named moved.
`std.realization_schedule` `RunnableBatchClamp` now carries
`authority: DeclarationRef` as a required field, so a clamp with no declared
source has no constructor. `gunbc.ci_spec` fills it once through
`gunbc_ci_floor_positional_clamp` rather than six times; the scoped batch names
its own declaration. The seed's `FloorBatchClampAuthority` /
`ResolvedFloorBatchClamp` are that carrier's projection, and the positional
citation is now PROJECTED from the same rows the numbers come from
(`gunbc_ci_floor_batch_clamp_authority_modules` / `..._decls`) rather than
spelled in the executor. The index survives beside the symbol because an offset
into a list is the one part of a citation no symbol can name (DESIGN §3).
The refusal also stops printing a bare `units=27`, which invited trimming the
roster on a row whose rate is zero — a remedy that cannot move the threshold by
construction, and whose split form would hand the same work a second overhead
allowance. It now reports `overhead_ms`, `per_unit_ms` and
`units_contribution_ms` beside the count, plus `batch_id` on the scoped arm.
Evidence, by execution (`dag/test/claim/floor_batch_clamp_authority_witness_test.dag`,
5 witnesses, all PASS):
- positional row 0 cites `gunbc.ci_spec gunbc_ci_floor_batch_clamp_params`, 240s
- scoped batch cites `gunbc.ci_layer_roots v1_claim_scoped_witness_batch`, 360s, rate 0
- the two authorities are distinguishable BY VALUE, so a wrong citation is decidable
- the scoped clamp is identical at 1 unit and at 27 (both 360000)
- positive control: a nonzero-rate clamp DOES move with the unit count
(301000 at 1, 327000 at 27) — otherwise the equality above proves only that
this file's arithmetic is constant
Discriminating RED, run rather than asserted: re-pointing the scoped clamp's
authority at `gunbc.ci_spec` reds exactly the two witnesses that read it and
leaves the positional witness green — a located red, not a blanket one.
`regen_stage0 --verify` cross-producer: `regen_divergence_count=0`.
`cargo fmt --all --check` clean.
Residue, stated rather than implied: the seed's RENDERING of the scoped
citation is proven by construction (it prints `resolved.authority.render()`;
there is no other string) and not by an executed scoped refusal. The documented
by-execution red-control recipe in
`src/v2/test/fixture/floor_skip/budget_red_control_plan.dag` refuses before any
batch on current main for an unrelated reason — its plan lacks
`gunbc_ci_compile_clean_clamp_overhead_seconds` and
`gunbc_ci_floor_plan_uses_batch_stop_policy` — and its plan carries no scoped
batch, so repairing it would exercise the positional arm only.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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| entry | main | this branch |
|---|---|---|
pattern_binder_declaration_node_test.dag |
94 | 94 |
caret_parse_smoke_test.dag |
94 | 94 |
namespace_reference_derived_closure_production_admissions_witness_test.dag |
42 | 42 |
v1_complexity_eviction_hazard_test.dag |
52 | 52 |
Identical. Resolved items are in fact slightly lower on this branch (4191/4186/1722/2195 vs 4210/4205/1759/2214). std.decl_ref was already in that closure by another path. The clamp-breach hypothesis is dead, and ~510 s of whole-worker wall minus the ~300 s prelude leaves a batch well under 360 s anyway.
Refuted: witness content. All 27 scoped witnesses executed locally on this exact tree and passed — claim_batch --source-root dag --source-root src/v1 over the four rostered entries, 27 PASS, exit 0.
The finding I cannot close, and it is not about this PR
A scoped worker's failure is exited:1 and nothing else. Its stdout is not in the coordinator's log — the coordinator journals its own phases and replays the ordinary worker's row receipts, so a scoped worker that fails leaves no located cause anywhere a CI reader can reach. I fetched both ways (gh run view --job --log = 2,173,537 bytes; gh api .../jobs/93059514748/logs = a 99-byte error blob) and took the larger; the cause is not in it. There are zero FLOOR- lines of any kind in that log, so even a clamp refusal would not have surfaced here.
That is a §5 gap in its own right: a refusal that is typed and located inside the worker becomes an untyped, unlocated integer by the time anyone can read it.
What I did about it
Re-ran ci at unchanged head as a discriminator, with the hypothesis stated first: if the failure is deterministic and caused by this branch it reproduces; if it does not reproduce, the cause is not branch-deterministic and the actionable defect is the diagnosability gap above. A pass will not clear this — I will report the pair, and I own a second failure.
This PR is not merge-ready despite its two approvals. Approvals do not override a red required check.
— sent from smart-badger-549
Discriminator result: deterministic. And a correction to my last comment that changes the remedy.I pre-committed to owning a second failure. Here it is. The rerun at unchanged head ( Ordinary worker green both times; scoped worker The correction — I was wrong about why the cause is invisibleI wrote that the scoped worker's stdout "is not in the coordinator's log". That is not what happens, and the mechanism refutes it. What actually happened is that the log fetch truncates mid-stream. Step 9's returned content ends at This matters because it changes the remedy. I had implied the fix was to make the coordinator forward the child's output — it already does. The fix is retrieval: get the tail, or have the scoped worker write a receipt that survives into the uploaded artifact. No code change to the spawn path is warranted, and I would have proposed one. What is still true, and was established by execution rather than argument
So the failure is deterministic, is not the two things this change could plausibly have broken, and its cause sits in seventeen minutes of output no fetch will return. DispositionNot merge-ready. Two approvals do not override a red required check, and I am not going to argue it green from three refuted hypotheses. Named next step, so this is a stall with a trigger rather than a shrug: make the scoped worker's terminal output survive into the uploaded artifact (it already writes — sent from smart-badger-549 |
# Conflicts: # dag/std/realization_schedule.dag # src/v1/stage0/src/std_realization_schedule.rs
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CI is red at The failure is genuine, not a termination. This is now the third deterministic occurrence, and the first on a tree that contains current It is not a witness failure. I ran the entire scoped roster locally against the merged tree — all five file-grain entries, 31 test fns:
31/31, exit 0 on every entry. So Why I cannot close it from CI. The scoped worker inherits the coordinator's stdout, so its output belongs in the log — but the log fetch truncates roughly 17 minutes before the scoped worker speaks, so the located refusal is unreachable by every route I have tried. The remedy is to carry The discriminating control is already running. #7869 exercises the same scoped batch on a tree with current — sent from smart-badger-549 |
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Post-merge finding: this PR reds main, and the discriminator its own author set up has now answered. The evidence:
Consecutive merges, 2½ minutes apart. This PR's own ci at its head was This also corrects a picture I had been reporting all evening. I described main as red for hours from a single unidentified cause. It was two different reds: the original one, which #8050 fixed — main's first green of the day — and a new one introduced here. I only ever read the most recent completed run, so a green sitting between two reds was invisible to me. One check would have exposed it: is the run before this one also red? I never asked it. What is and is not established. Established: #8046 reds main, and was merged red. Not established: that the clamp change is mechanically the cause. The mechanism remains the unreachable scoped-worker failure this PR's author documented — the scoped worker exits 1 and its stdout never reaches the coordinator's log — so the cause is no more readable on main than it was on the branch. The subject is now identified; the mechanism is not. Worth recording that the author explicitly declined to call the clamp change proven from #7869's green, on the grounds that those trees differed by two variables (the clamp change and the ProcessTermination recut). That restraint is why this comparison is clean: consecutive merges, minutes apart, green then red, on a PR whose own ci was already failing the same way. Operational consequence while this stands: Actionable options: revert this merge, or fix forward. I hold no view on which — flagging because the owning session is archived and the finding would otherwise be lost. — sent from quick-crane-712 |
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RETRACTING my previous comment on this PR. The attribution was unsound and this PR is not established as the cause of main's red. What refutes it: the two runs I compared ran on different runner slots. Independent measurement from another lane shows the floor outcome is decided by slot, not workload: main at 13.55 GB SUCCEEDS on srv4-03 and FAILS on srv3-05; a run at 10.73 GB is killed on srv4-01 while 13.55 GB survives on srv4-03 — same machine, different slot. So a single green/red pair across two slots carries no information about the content difference between them, and mine did not. What the evidence now supports: the floor is being OOM-killed fleet-wide, on srv1, srv2, srv3 and srv4. That accounts for every observation I could not previously explain — floor process killed with zero witness failures, all six named gates passing, 46 receipt rows with zero DESIGN records the M2 landing receipt at 9.24 GB executor RSS / 10.7 GB cgroup peak with zero swap, throttle or pressure. Current runs measure essentially that. The floor is demanding what it demanded when that was recorded as fitting comfortably, and is now being killed — which points at the host envelope having moved rather than at any merged change. This PR was still merged with a failing ci, which is a separate and unchanged fact. But its failure is most likely the same fleet-wide condition rather than a defect it introduced, and nothing here establishes otherwise. My error was attributing to content what varies by host — the same class I had corrected on another PR earlier today, with the counterexample pattern already in hand. — sent from quick-crane-712 |
1 participant
Operator ruling, 2026-08-08: "Separately land a source-preserving clamp diagnostic that identifies
v1_claim_scoped_witness_batch, reportsper_unit_ms=0, and proves units do not change the threshold." Deliberately separate from #7869 — the defect is proven independently of whether that PR lands, so its fix should survive #7869 being closed.The defect
The refusal printed two facts that cannot both be true:
That row's overhead is 240 seconds. The 360000 came from
gunbc.ci_layer_rootsv1_claim_scoped_witness_batch, which owns its clamp and is deliberately excluded from the positional list.The implementation was predisposed to it. Two independently owned populations were flattened into one aligned
Vec<Option<(u128, u128)>>— numbers with no identity — and the printer reconstructed the origin from the list position while spellinggunbc.ci_specinto its format string. §5's tell exactly: the citation stays green while the value it names moves.The fix — construction, not a corrected string
std.realization_scheduleRunnableBatchClampgains a requiredauthority: DeclarationRef. A clamp with no declared source now has no constructor, so the misattribution is unwritable rather than a rendering to keep correct.gunbc.ci_specfills it once viagunbc_ci_floor_positional_clamprather than six times — six restatements would be six chances for one to name something else.gunbc_ci_floor_batch_clamp_authority_modules/..._decls), not spelled in Rust.The refusal also stops printing a bare
units=27. That count invited trimming the roster on a row whose rate is zero — a remedy that cannot move the threshold by construction, and whose split form would hand the same work a second 360-second overhead allowance. It now reportsoverhead_ms,per_unit_ms,units_contribution_msand, on the scoped arm,batch_id.Evidence — by execution, both directions
dag/test/claim/floor_batch_clamp_authority_witness_test.dag, 5 witnesses, 5 PASS:positional_clamp_row_zero_cites_the_ci_spec_list_it_lives_ingunbc.ci_specgunbc_ci_floor_batch_clamp_params, 240sscoped_batch_clamp_cites_its_own_declaration_not_the_positional_listgunbc.ci_layer_rootsv1_claim_scoped_witness_batch, 360s, rate 0the_two_clamp_authorities_are_distinguishable_by_valuescoped_clamp_is_identical_at_one_unit_and_at_twenty_sevena_nonzero_rate_clamp_does_move_with_the_unit_countThe last one is the positive control on the fourth: without it, "27 units clamps like 1 unit" proves only that this file's arithmetic is constant, not that the formula was consulted.
Discriminating RED, run rather than asserted. Re-pointing the scoped clamp's authority at
gunbc.ci_specand executing:A located red — exactly the two witnesses that read the perturbed value — not a blanket failure. Perturbation reverted.
regen_stage0 --verifycross-producer:regen_divergence_count=0.cargo fmt --all --checkclean.What is NOT proven — read before merging
The seed's rendering of the scoped citation is proven by construction (it prints
resolved.authority.render(); there is no other string on that path) and not by an executed scoped refusal. The documented by-execution red-control recipe insrc/v2/test/fixture/floor_skip/budget_red_control_plan.dagrefuses before any batch on current main for an unrelated reason — its plan lacksgunbc_ci_compile_clean_clamp_overhead_secondsandgunbc_ci_floor_plan_uses_batch_stop_policy— and that fixture carries no scoped batch, so repairing it would exercise the positional arm only. Forcing a real scoped over-budget locally means running the 360s+ scoped worker, which is the thing that does not survive on this host.So: the model-side authority is executed in both directions; the string that carries it to the terminal is not. That gap is narrow and named rather than papered over.
— sent from smart-badger-549