enricobuehlerandClaude Fable 5 2e6cd0e235 feat(capture): stall attribution phases A.2+A.3 — micro-probes and DxgKrnl ETW name the class ...

Phase A.2: a refcounted micro-probe engine (fence round-trip per adapter,
DwmGetCompositionTimingInfo tick, watchdogged DwmFlush, Level-Zero
D3DKMTGetScanLine, CPU jitter sentinel) samples continuously on detached
sacrificial threads; each stall report reads the window back and the verdict
matrix folds it with the driver telemetry into a named class: ours-worker /
ours-delivery / CLASS-1 adapter freeze / CLASS-2 compositor blocked /
frame-generation / unattributed. The metronomic WARN carries the per-class
session tally.

Phase A.3: an event-id-filtered real-time ETW session on
Microsoft-Windows-DxgKrnl (QueryChildStatus 150/151, SetPowerState 154/155,
IndicateChildStatus 272, SetTimingsFromVidPn 430, DisplayDetectControl
1096/1097) rides every stall line as a DDI bracket summary — naming the
servicing call and its duration instead of 'below Windows'. Degrades to
etw=unavailable without admin; probes degrade per-leg (absence is stated,
never guessed).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-29 23:44:35 +02:00

..

src

feat(capture): stall attribution phases A.2+A.3 — micro-probes and DxgKrnl ETW name the class

2026-07-29 23:44:35 +02:00

Cargo.toml

chore(unsafe): the workspace adopts the drivers' unsafe discipline

2026-07-28 21:31:41 +02:00