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Fix: unify host trace clocks and STRACE formatting - #1824
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In `@docs/dfx/host-trace.md`:
- Around line 38-41: Update the timestamp explanation around the host-record
anchor formula to explicitly limit both the formula and the monotonic
event-ordering and duration claims to host-clock records. Clarify that records
with clk=dev use device-clock timestamps, preserving the existing distinction
described elsewhere in the document.
In `@simpler_setup/tools/strace_timing.py`:
- Around line 71-74: Update _CLOCK_ANCHOR_RE used by parse_clock_anchors to
match only the documented host TIMING clock_anchor record, including its
required record prefix and a boundary immediately after wall_ns. Preserve valid
anchor parsing while preventing ordinary log messages containing the payload
from producing ClockAnchor instances.
In `@src/common/log/host_log.cpp`:
- Around line 255-259: Update emit_ungated and its callers to return whether the
complete log record was written, propagating write_stderr failures. In the
clock-anchor path, store clock_anchor_pid_ only when emit_ungated reports
successful completion, ensuring each process emits a usable wall-clock anchor.
In `@tests/ut/cpp/a5/test_host_log_off.cpp`:
- Line 241: Update the test assertion around anchor_pos and the "first-record"
lookup to store both positions, assert each record was found, then verify
anchor_pos precedes first_record_pos. Preserve the existing ordering check while
preventing std::string::npos from satisfying it.
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📒 Files selected for processing (17)
docs/dfx/host-trace.mddocs/logging.mdsimpler_setup/tools/strace_timing.pysrc/common/log/host_log.cppsrc/common/log/include/common/host_span.hsrc/common/log/include/common/host_span_scope.hsrc/common/log/include/common/log_clock.hsrc/common/log/include/common/strace.hsrc/common/log/include/host_log.hsrc/common/log/unified_log_host.cppsrc/common/platform/onboard/host/c_api_shared.cppsrc/common/platform/sim/host/c_api_shared.cppsrc/common/worker/native_run_context.htests/ut/cpp/CMakeLists.txttests/ut/cpp/a5/test_host_log_off.cpptests/ut/cpp/stubs/test_stubs.cpptests/ut/py/test_strace_timing.py
- Timestamp host logs with the monotonic span clock and emit one wall-clock anchor per process - Parse only complete logger-owned clock anchors while tolerating collector prefixes - Route structured spans through HostLogger as the sole STRACE grammar owner - Preserve 64-bit invocation IDs and legacy trace parser compatibility Addresses items 1 and 2 of hw-native-sys#1792.
ChaoZheng109
approved these changes
Aug 14, 2026
Collaborator
|
LGTM overall — 目标与实现完全一致,锁序 / fork 语义 / 64 位 以下两点为非阻塞的可选优化,不影响本 PR 合并,建议放到后续 PR(或 #1792 的后续项)里处理: 1. 时钟锚点映射已产出但尚未被工具消费
2. 宿主日志快路径每条记录多一次
|
This was referenced Aug 18, 2026
ChaoWao
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that referenced
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Aug 19, 2026
hw-native-sys#1793's C2b reserved `ext.<producer>.<span>` so a caller outside simpler cannot land a span in one of our level words. hw-native-sys#1877 added the guard that makes the classification hold — `span_family` answers `external`, and the invocation-keyed views drop that family. What it did not do is make the rest of the parser stop treating an external span as a source of truth about our own structure, and nothing said what a producer may expect in return. Three places read a producer's record and answered questions about us with it: * The swimlane's process label was a two-way split, so a process that emitted nothing but external spans was announced as `simpler chip child`. * Lane naming reads `role`, which is an ordinary attribute key a producer is free to use for its own meaning. `role=facade` on an external span renamed its lane to `orchestrator / facade`. * Lane splitting reads `slot_id` and `depth`. A pipeline slot is ours, so a producer writing one decided whether one of *our* threads split into per-slot lanes and into how many. The invariant behind all three is one sentence: our views infer our structure only from our own spans. Role inference and lane splitting now filter the family out, and the process label has a third arm carrying no `simpler` prefix, because such a process is not ours. Dispatch-flow pairing needed no change — it keys on `host_span_leaf`, which is `None` for anything not ours, and a test now holds that. `external_producer()` names the second segment, and requires all three: a malformed `ext.foo` is still external, since it can never be mistaken for ours, but it attributes to nobody rather than to a producer named after whatever follows. A producer segment may itself be one of our level words — `ext.host.foo` is a producer called `host` and stays external, which is the case the namespace was reserved for. The contract is the deliverable, so it is executable. `tests/ut/py/ test_strace_timing.py` gains eight tests under an `ext.` heading, one per row of the table now in `docs/dfx/host-trace.md`: the name shape, the impersonation attempt, exclusion from the invocation views and why (`inv` is our run epoch and no public surface exposes it, so admitting external spans forges one invocation holding all of them), presence on the swimlane, the shared-process case, and the three takeover attempts above. Another repository adapting to this namespace can read them as the specification and mirror them against its own emitter. Two names in this subsystem said the wrong thing and are corrected here, since the change is already rewriting the code and the prose around them. `legacy_spans` never described what it does. hw-native-sys#1730 introduced it as "spans belonging to the established `simpler_run` views", so *legacy* qualified the **views** — the ones that predated the swimlane — and the name reads as though the spans were obsolete. Its body has since stopped resembling that intent altogether: it was `not name.startswith("l3.")` and is now a family exclusion, so the word matches nothing in it. It is `invocation_spans` now, which is what it returns: the spans an invocation-keyed view may consume. The test asserting it, and the local holding its result, follow. This is a name pypto probes with `hasattr(_strace_timing, "legacy_spans")`, falling back to a `startswith("l3.")` filter when it is absent. That filter is inert today and stays inert for logs from this tree, because `l3.` was retired in hw-native-sys#1877 and nothing emits it — so a pypto that has not adopted the new name will admit host-family spans into its per-launch grouping, and its numbers will be wrong without an error. That is a known consequence of taking the correct name here, recorded so the answer is findable from the symptom. Nothing in this repository reads the old name. `_legacy_record` in the tests was *accurate* — it builds a record with the retired wall-clock log prefix rather than `[mono_ns=…]` — but it did not say which part is old, so it is `_wall_clock_prefix_record`. Renaming it exposed that the support it exercises had no test: `_HOST_LOG_TIME` accepts both prefix forms, and dropping the wall-clock arm left all 43 tests green. It is not dead. A record's attribute list runs to the end of its line, so what bounds it is the lookahead for the *next* record's log prefix — and two complete records do share one physical line, often enough that pypto's reader re-splits on `[STRACE]` before parsing, because ranks forked by an L3 share the capture fd. Without the wall-clock arm the first record's `attrs` absorbs the second's entire prefix: rank=0[2026-08-04 10:00:00.000001][T0x1][TIMING] emit_span: [strace.h:132] No error, just a wrong value. A test now covers that line shape, and the comment above the pattern records what makes both arms load-bearing and when the wall-clock one can go — once no log predating hw-native-sys#1824 is read. `simpler_setup/tools/README.md` described `--swimlane` as consuming `l3.*` markers. That spelling was retired by hw-native-sys#1877; the line is in the paragraph this change rewrites, and the same grep that found the rest of the rename returns it among a dozen legitimate `l3` variable names, which is how it survived. Other `legacy` mentions in the tree name genuinely old capture formats and ABI fields and are left alone. Verification: - `pytest tests/ut/py` — 1624 passed, 0 failed; the strace file is 44 of those. Two earlier full runs on this same tree failed on `test_second_child_failure_reaps_first` and the third did not, which is the forked-child reaping flake recorded locally on 2026-08-16. It passes 4/4 in isolation, and this change touches no file under `tests/ut/py/test_worker/` and nothing in worker startup. - Each behaviour has a negative control: reverting the process label, the role-inference filter, the lane-structure filter, the producer well-formedness check, or the wall-clock prefix arm each turns exactly the corresponding test red and nothing else. - End to end through the real emitter rather than a hand-built string: `_emit_host_span` writes `chip.run` and `ext.pypto.decode_layer` on one thread via `HostLogger::log_host_span`, and the CLI puts the external span on the swimlane, keeps it out of `--trace-out` and the TPOT table, and ignores its `role=facade slot_id=99`. - `ctest -LE requires_hardware` — 101/101, unchanged; no C++ in this change. - ruff, ruff format, pyright, markdownlint clean.
5 tasks done
ChaoWao
added a commit
to ChaoWao/simpler-fork
that referenced
this pull request
Aug 19, 2026
hw-native-sys#1793's C2b reserved `ext.<producer>.<span>` so a caller outside simpler cannot land a span in one of our level words. hw-native-sys#1877 added the guard that makes the classification hold — `span_family` answers `external`, and the invocation-keyed views drop that family. What it did not do is make the rest of the parser stop treating an external span as a source of truth about our own structure, and nothing said what a producer may expect in return. Three places read a producer's record and answered questions about us with it: * The swimlane's process label was a two-way split, so a process that emitted nothing but external spans was announced as `simpler chip child`. * Lane naming reads `role`, which is an ordinary attribute key a producer is free to use for its own meaning. `role=facade` on an external span renamed its lane to `orchestrator / facade`. * Lane splitting reads `slot_id` and `depth`. A pipeline slot is ours, so a producer writing one decided whether one of *our* threads split into per-slot lanes and into how many. The invariant behind all three is one sentence: our views infer our structure only from our own spans. Role inference and lane splitting now filter the family out, and the process label has a third arm carrying no `simpler` prefix, because such a process is not ours. Dispatch-flow pairing needed no change — it keys on `host_span_leaf`, which is `None` for anything not ours, and a test now holds that. `external_producer()` names the second segment, and requires all three: a malformed `ext.foo` is still external, since it can never be mistaken for ours, but it attributes to nobody rather than to a producer named after whatever follows. A producer segment may itself be one of our level words — `ext.host.foo` is a producer called `host` and stays external, which is the case the namespace was reserved for. The contract is the deliverable, so it is executable. `tests/ut/py/ test_strace_timing.py` gains eight tests under an `ext.` heading, one per row of the table now in `docs/dfx/host-trace.md`: the name shape, the impersonation attempt, exclusion from the invocation views and why (`inv` is our run epoch and no public surface exposes it, so admitting external spans forges one invocation holding all of them), presence on the swimlane, the shared-process case, and the three takeover attempts above. Another repository adapting to this namespace can read them as the specification and mirror them against its own emitter. Two names in this subsystem said the wrong thing and are corrected here, since the change is already rewriting the code and the prose around them. `legacy_spans` never described what it does. hw-native-sys#1730 introduced it as "spans belonging to the established `simpler_run` views", so *legacy* qualified the **views** — the ones that predated the swimlane — and the name reads as though the spans were obsolete. Its body has since stopped resembling that intent altogether: it was `not name.startswith("l3.")` and is now a family exclusion, so the word matches nothing in it. It is `invocation_spans` now, which is what it returns: the spans an invocation-keyed view may consume. The test asserting it, and the local holding its result, follow. This is a name pypto probes with `hasattr(_strace_timing, "legacy_spans")`, falling back to a `startswith("l3.")` filter when it is absent. That filter is inert today and stays inert for logs from this tree, because `l3.` was retired in hw-native-sys#1877 and nothing emits it — so a pypto that has not adopted the new name will admit host-family spans into its per-launch grouping, and its numbers will be wrong without an error. That is a known consequence of taking the correct name here, recorded so the answer is findable from the symptom. Nothing in this repository reads the old name. ## Reading archived logs is dropped Two facilities existed only so a log this tree can no longer produce stays parseable, and the tool is held to one standard instead: the current code is clean and self-consistent. * `_HOST_LOG_TIME` accepted the wall-clock record prefix hw-native-sys#1824 replaced. * `_RETIRED_WORDS` mapped `simpler_run` / `simpler_prewarm` / `l3` onto the families they used to name. Its own comment tied the two together — "the same reason `_STRACE_RE` still accepts the wall-clock record prefix" — so keeping one and dropping the other would have left the tool inconsistent with itself. Both are gone, with the test that guarded the retired spellings and the `_legacy_record` helper that built the retired prefix. What that costs, measured rather than assumed, is asymmetric. A retired *chip* name now answers `unknown`, which `invocation_spans` keeps, so it groups exactly as it did before. A retired *host* name also answers `unknown` — and `unknown` is kept — so on a log predating hw-native-sys#1877 the `l3.*` scheduler spans now enter invocation grouping instead of being excluded from it, which is the pollution the family split exists to prevent. That is the concrete meaning of no longer reading archived logs. Removing the wall-clock arm exposed one invariant worth keeping a test for, and it is not about old logs. A record's attribute list runs to the end of its line, so what bounds it is the lookahead for the *next* record's log prefix — and two complete records do share one physical line, because ranks forked by an L3 share the capture fd, which is why pypto's reader re-splits on `[STRACE]` first. With the prefix lookahead gone the earlier record's `attrs` absorbs the later one's whole prefix rather than failing to match: rank=0[mono_ns=1000002][T0x2][TIMING] emit_host_span: No error, just a wrong value, and nothing covered it. A test now does, against the current prefix. `test_retired_span_names_...` also asserted `host_span_leaf` on the current names; that part moved into the level-word test, which is where it belongs. `simpler_setup/tools/README.md` described `--swimlane` as consuming `l3.*` markers. That spelling was retired by hw-native-sys#1877; the line is in the paragraph this change rewrites, and the same grep that found the rest of the rename returns it among a dozen legitimate `l3` variable names, which is how it survived. Other `legacy` mentions in the tree name genuinely old capture formats and ABI fields and are left alone. Verification: - `pytest tests/ut/py` — 1624 passed, 0 failed; the strace file is 44 of those. Two earlier full runs on this same tree failed on `test_second_child_failure_reaps_first` and the third did not, which is the forked-child reaping flake recorded locally on 2026-08-16. It passes 4/4 in isolation, and this change touches no file under `tests/ut/py/test_worker/` and nothing in worker startup. - Each behaviour has a negative control: reverting the process label, the role-inference filter, the lane-structure filter, the producer well-formedness check, or the record-bounding prefix lookahead each turns exactly the corresponding test red and nothing else. - End to end through the real emitter rather than a hand-built string: `_emit_host_span` writes `chip.run` and `ext.pypto.decode_layer` on one thread via `HostLogger::log_host_span`, and the CLI puts the external span on the swimlane, keeps it out of `--trace-out` and the TPOT table, and ignores its `role=facade slot_id=99`. - `ctest -LE requires_hardware` — 101/101, unchanged; no C++ in this change. - ruff, ruff format, pyright, markdownlint clean.
ChaoWao
added a commit
to ChaoWao/simpler-fork
that referenced
this pull request
Aug 19, 2026
hw-native-sys#1793's C2b reserved `ext.<producer>.<span>` so a caller outside simpler cannot land a span in one of our level words. hw-native-sys#1877 added the guard that makes the classification hold — `span_family` answers `external`, and the invocation-keyed views drop that family. What it did not do is make the rest of the parser stop treating an external span as a source of truth about our own structure, and nothing said what a producer may expect in return. Three places read a producer's record and answered questions about us with it: * The swimlane's process label was a two-way split, so a process that emitted nothing but external spans was announced as `simpler chip child`. * Lane naming reads `role`, which is an ordinary attribute key a producer is free to use for its own meaning. `role=facade` on an external span renamed its lane to `orchestrator / facade`. * Lane splitting reads `slot_id` and `depth`. A pipeline slot is ours, so a producer writing one decided whether one of *our* threads split into per-slot lanes and into how many. The invariant behind all three is one sentence: our views infer our structure only from our own spans. Role inference and lane splitting now filter the family out, and the process label has a third arm carrying no `simpler` prefix, because such a process is not ours. Dispatch-flow pairing needed no change — it keys on `host_span_leaf`, which is `None` for anything not ours, and a test now holds that. `external_producer()` names the second segment, and requires all three: a malformed `ext.foo` is still external, since it can never be mistaken for ours, but it attributes to nobody rather than to a producer named after whatever follows. A producer segment may itself be one of our level words — `ext.host.foo` is a producer called `host` and stays external, which is the case the namespace was reserved for. The contract is the deliverable, so it is executable. `tests/ut/py/ test_strace_timing.py` gains eight tests under an `ext.` heading, one per row of the table now in `docs/dfx/host-trace.md`: the name shape, the impersonation attempt, exclusion from the invocation views and why (`inv` is our run epoch and no public surface exposes it, so admitting external spans forges one invocation holding all of them), presence on the swimlane, the shared-process case, and the three takeover attempts above. Another repository adapting to this namespace can read them as the specification and mirror them against its own emitter. Two names in this subsystem said the wrong thing and are corrected here, since the change is already rewriting the code and the prose around them. `legacy_spans` never described what it does. hw-native-sys#1730 introduced it as "spans belonging to the established `simpler_run` views", so *legacy* qualified the **views** — the ones that predated the swimlane — and the name reads as though the spans were obsolete. Its body has since stopped resembling that intent altogether: it was `not name.startswith("l3.")` and is now a family exclusion, so the word matches nothing in it. It is `invocation_spans` now, which is what it returns: the spans an invocation-keyed view may consume. The test asserting it, and the local holding its result, follow. This is a name pypto probes with `hasattr(_strace_timing, "legacy_spans")`, falling back to a `startswith("l3.")` filter when it is absent. That filter is inert today and stays inert for logs from this tree, because `l3.` was retired in hw-native-sys#1877 and nothing emits it — so a pypto that has not adopted the new name will admit host-family spans into its per-launch grouping, and its numbers will be wrong without an error. That is a known consequence of taking the correct name here, recorded so the answer is findable from the symptom. Nothing in this repository reads the old name. ## Reading archived logs is dropped Two facilities existed only so a log this tree can no longer produce stays parseable, and the tool is held to one standard instead: the current code is clean and self-consistent. * `_HOST_LOG_TIME` accepted the wall-clock record prefix hw-native-sys#1824 replaced. * `_RETIRED_WORDS` mapped `simpler_run` / `simpler_prewarm` / `l3` onto the families they used to name. Its own comment tied the two together — "the same reason `_STRACE_RE` still accepts the wall-clock record prefix" — so keeping one and dropping the other would have left the tool inconsistent with itself. Both are gone, with the test that guarded the retired spellings and the `_legacy_record` helper that built the retired prefix. What that costs, measured rather than assumed, is asymmetric. A retired *chip* name now answers `unknown`, which `invocation_spans` keeps, so it groups exactly as it did before. A retired *host* name also answers `unknown` — and `unknown` is kept — so on a log predating hw-native-sys#1877 the `l3.*` scheduler spans now enter invocation grouping instead of being excluded from it, which is the pollution the family split exists to prevent. That is the concrete meaning of no longer reading archived logs. Removing the wall-clock arm exposed one invariant worth keeping a test for, and it is not about old logs. A record's attribute list runs to the end of its line, so what bounds it is the lookahead for the *next* record's log prefix — and two complete records do share one physical line, because ranks forked by an L3 share the capture fd, which is why pypto's reader re-splits on `[STRACE]` first. With the prefix lookahead gone the earlier record's `attrs` absorbs the later one's whole prefix rather than failing to match: rank=0[mono_ns=1000002][T0x2][TIMING] emit_host_span: No error, just a wrong value, and nothing covered it. A test now does, against the current prefix. `test_retired_span_names_...` also asserted `host_span_leaf` on the current names; that part moved into the level-word test, which is where it belongs. ## The level ladder was written three times and pinned nowhere Dropping the retired map put weight on what `span_family` does with a word it does not know, which turned up a defect of my own from hw-native-sys#1877. `_HOST_WORDS` carried the comment "this parser cannot import the runtime package, so it carries the list and the unit tests pin the two together" — and **no test referenced `WorkerLevel` at all**. The level words existed in three independent hand-written copies: the ladder in `python/simpler/worker_level.py`, this parser's tuple, and a literal `for word in ("host", "network1", …)` inside the test that was supposed to be the pin. So a level added to the ladder would have made the runtime emit a word the parser does not know, `span_family` would answer `unknown`, and — because unknown is deliberately kept rather than dropped — those per-task spans would enter invocation grouping under a forged `(pid, 0)` key. Wrong tables, no error, and none of the three copies would have complained. That is the real source of an unrecognized name; a typo is the unlikely one. `test_every_level_word_the_ladder_names_is_a_word_this_parser_knows` now compares the two as sets and checks each word reaches the family its ladder position implies. The parser cannot import the runtime package, but the test can, which is what makes the pin possible at all. Adding `network4 = 7` to the ladder alone fails it with `ladder-only=['network4'], parser-only=[]`, and the level-word test too, since its loop now walks `WorkerLevel` instead of a fourth copy. The comment that claimed a pin now names the test that is one. `simpler_setup/tools/README.md` described `--swimlane` as consuming `l3.*` markers. That spelling was retired by hw-native-sys#1877; the line is in the paragraph this change rewrites, and the same grep that found the rest of the rename returns it among a dozen legitimate `l3` variable names, which is how it survived. Other `legacy` mentions in the tree name genuinely old capture formats and ABI fields and are left alone. Verification: - `pytest tests/ut/py` — 1624 passed, 0 failed; the strace file is 44 of those. Two earlier full runs on this same tree failed on `test_second_child_failure_reaps_first` and the third did not, which is the forked-child reaping flake recorded locally on 2026-08-16. It passes 4/4 in isolation, and this change touches no file under `tests/ut/py/test_worker/` and nothing in worker startup. - Each behaviour has a negative control: reverting the process label, the role-inference filter, the lane-structure filter, the producer well-formedness check, the record-bounding prefix lookahead, or the ladder-to-parser pin each turns exactly the corresponding test red and nothing else. - End to end through the real emitter rather than a hand-built string: `_emit_host_span` writes `chip.run` and `ext.pypto.decode_layer` on one thread via `HostLogger::log_host_span`, and the CLI puts the external span on the swimlane, keeps it out of `--trace-out` and the TPOT table, and ignores its `role=facade slot_id=99`. - `ctest -LE requires_hardware` — 101/101, unchanged; no C++ in this change. - ruff, ruff format, pyright, markdownlint clean.
ChaoWao
added a commit
that referenced
this pull request
Aug 19, 2026
#1793's C2b reserved `ext.<producer>.<span>` so a caller outside simpler cannot land a span in one of our level words. #1877 added the guard that makes the classification hold — `span_family` answers `external`, and the invocation-keyed views drop that family. What it did not do is make the rest of the parser stop treating an external span as a source of truth about our own structure, and nothing said what a producer may expect in return. Three places read a producer's record and answered questions about us with it: * The swimlane's process label was a two-way split, so a process that emitted nothing but external spans was announced as `simpler chip child`. * Lane naming reads `role`, which is an ordinary attribute key a producer is free to use for its own meaning. `role=facade` on an external span renamed its lane to `orchestrator / facade`. * Lane splitting reads `slot_id` and `depth`. A pipeline slot is ours, so a producer writing one decided whether one of *our* threads split into per-slot lanes and into how many. The invariant behind all three is one sentence: our views infer our structure only from our own spans. Role inference and lane splitting now filter the family out, and the process label has a third arm carrying no `simpler` prefix, because such a process is not ours. Dispatch-flow pairing needed no change — it keys on `host_span_leaf`, which is `None` for anything not ours, and a test now holds that. `external_producer()` names the second segment, and requires all three: a malformed `ext.foo` is still external, since it can never be mistaken for ours, but it attributes to nobody rather than to a producer named after whatever follows. A producer segment may itself be one of our level words — `ext.host.foo` is a producer called `host` and stays external, which is the case the namespace was reserved for. The contract is the deliverable, so it is executable. `tests/ut/py/ test_strace_timing.py` gains eight tests under an `ext.` heading, one per row of the table now in `docs/dfx/host-trace.md`: the name shape, the impersonation attempt, exclusion from the invocation views and why (`inv` is our run epoch and no public surface exposes it, so admitting external spans forges one invocation holding all of them), presence on the swimlane, the shared-process case, and the three takeover attempts above. Another repository adapting to this namespace can read them as the specification and mirror them against its own emitter. Two names in this subsystem said the wrong thing and are corrected here, since the change is already rewriting the code and the prose around them. `legacy_spans` never described what it does. #1730 introduced it as "spans belonging to the established `simpler_run` views", so *legacy* qualified the **views** — the ones that predated the swimlane — and the name reads as though the spans were obsolete. Its body has since stopped resembling that intent altogether: it was `not name.startswith("l3.")` and is now a family exclusion, so the word matches nothing in it. It is `invocation_spans` now, which is what it returns: the spans an invocation-keyed view may consume. The test asserting it, and the local holding its result, follow. This is a name pypto probes with `hasattr(_strace_timing, "legacy_spans")`, falling back to a `startswith("l3.")` filter when it is absent. That filter is inert today and stays inert for logs from this tree, because `l3.` was retired in #1877 and nothing emits it — so a pypto that has not adopted the new name will admit host-family spans into its per-launch grouping, and its numbers will be wrong without an error. That is a known consequence of taking the correct name here, recorded so the answer is findable from the symptom. Nothing in this repository reads the old name. ## Reading archived logs is dropped Two facilities existed only so a log this tree can no longer produce stays parseable, and the tool is held to one standard instead: the current code is clean and self-consistent. * `_HOST_LOG_TIME` accepted the wall-clock record prefix #1824 replaced. * `_RETIRED_WORDS` mapped `simpler_run` / `simpler_prewarm` / `l3` onto the families they used to name. Its own comment tied the two together — "the same reason `_STRACE_RE` still accepts the wall-clock record prefix" — so keeping one and dropping the other would have left the tool inconsistent with itself. Both are gone, with the test that guarded the retired spellings and the `_legacy_record` helper that built the retired prefix. What that costs, measured rather than assumed, is asymmetric. A retired *chip* name now answers `unknown`, which `invocation_spans` keeps, so it groups exactly as it did before. A retired *host* name also answers `unknown` — and `unknown` is kept — so on a log predating #1877 the `l3.*` scheduler spans now enter invocation grouping instead of being excluded from it, which is the pollution the family split exists to prevent. That is the concrete meaning of no longer reading archived logs. Removing the wall-clock arm exposed one invariant worth keeping a test for, and it is not about old logs. A record's attribute list runs to the end of its line, so what bounds it is the lookahead for the *next* record's log prefix — and two complete records do share one physical line, because ranks forked by an L3 share the capture fd, which is why pypto's reader re-splits on `[STRACE]` first. With the prefix lookahead gone the earlier record's `attrs` absorbs the later one's whole prefix rather than failing to match: rank=0[mono_ns=1000002][T0x2][TIMING] emit_host_span: No error, just a wrong value, and nothing covered it. A test now does, against the current prefix. `test_retired_span_names_...` also asserted `host_span_leaf` on the current names; that part moved into the level-word test, which is where it belongs. ## The level ladder was written three times and pinned nowhere Dropping the retired map put weight on what `span_family` does with a word it does not know, which turned up a defect of my own from #1877. `_HOST_WORDS` carried the comment "this parser cannot import the runtime package, so it carries the list and the unit tests pin the two together" — and **no test referenced `WorkerLevel` at all**. The level words existed in three independent hand-written copies: the ladder in `python/simpler/worker_level.py`, this parser's tuple, and a literal `for word in ("host", "network1", …)` inside the test that was supposed to be the pin. So a level added to the ladder would have made the runtime emit a word the parser does not know, `span_family` would answer `unknown`, and — because unknown is deliberately kept rather than dropped — those per-task spans would enter invocation grouping under a forged `(pid, 0)` key. Wrong tables, no error, and none of the three copies would have complained. That is the real source of an unrecognized name; a typo is the unlikely one. `test_every_level_word_the_ladder_names_is_a_word_this_parser_knows` now compares the two as sets and checks each word reaches the family its ladder position implies. The parser cannot import the runtime package, but the test can, which is what makes the pin possible at all. Adding `network4 = 7` to the ladder alone fails it with `ladder-only=['network4'], parser-only=[]`, and the level-word test too, since its loop now walks `WorkerLevel` instead of a fourth copy. The comment that claimed a pin now names the test that is one. `simpler_setup/tools/README.md` described `--swimlane` as consuming `l3.*` markers. That spelling was retired by #1877; the line is in the paragraph this change rewrites, and the same grep that found the rest of the rename returns it among a dozen legitimate `l3` variable names, which is how it survived. Other `legacy` mentions in the tree name genuinely old capture formats and ABI fields and are left alone. Verification: - `pytest tests/ut/py` — 1624 passed, 0 failed; the strace file is 44 of those. Two earlier full runs on this same tree failed on `test_second_child_failure_reaps_first` and the third did not, which is the forked-child reaping flake recorded locally on 2026-08-16. It passes 4/4 in isolation, and this change touches no file under `tests/ut/py/test_worker/` and nothing in worker startup. - Each behaviour has a negative control: reverting the process label, the role-inference filter, the lane-structure filter, the producer well-formedness check, the record-bounding prefix lookahead, or the ladder-to-parser pin each turns exactly the corresponding test red and nothing else. - End to end through the real emitter rather than a hand-built string: `_emit_host_span` writes `chip.run` and `ext.pypto.decode_layer` on one thread via `HostLogger::log_host_span`, and the CLI puts the external span on the swimlane, keeps it out of `--trace-out` and the TPOT table, and ignores its `role=facade slot_id=99`. - `ctest -LE requires_hardware` — 101/101, unchanged; no C++ in this change. - ruff, ruff format, pyright, markdownlint clean.
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Addresses items 1 and 2 of #1792.