swung0x48 68b55ea371 [MG_Remote] (Disaggregated): the inproc barrier watchdog is a deadlock detector, so its budget leaves room for a leg ...

lavapipe/llvmpipe stall the apply thread for tens of seconds inside texture-handle
registration (vkCreateImageView -> lvp_CreateImageView -> llvmpipe_register_texture,
a JIT/futex path): one measured stall is 29.3-39.7 s and a whole inproc retrace run
accumulates ~44.6 s of it. At a 30 s bound those runs red intermittently on
Fatal{BarrierTimeout, "ResourceRespecify"} while the same stall under monolith is
merely slow - monolith has no cap on that path. Since the monolith shares the stall,
the bound, not the workload, was the defect.

kBarrierTimeoutMs becomes 120000, >3x the largest observed stall, which still leaves
the watchdog job: a record that is never retired still terminates the run and the
Fatal still names the seq. The comment now says deadlock detector rather than
performance gate and carries the measurement.

The fake-clock case that pins the budget moves with it: FenceWaitBudgetHonorsGl-
TimeoutAndFiniteTransportChunks expected 30000/30001/90000 and now expects
120000/120001/180000, so the assertion still pins the value instead of drifting.
Texts that wrote the old number down are updated: ARCHITECTURE 17.1, CONTRACT-P5E
2.4 (which now names kBarrierTimeoutMs rather than the literal), and the two
bring-up comments in PipeRoute.h / WireTables.cpp that dated a self-wait to
"thirty seconds".

2026-09-21 02:54:47 -04:00

..

Disaggregated

[MG_Remote] (Disaggregated): the inproc barrier watchdog is a deadlock detector, so its budget leaves room for a leg

2026-09-21 02:54:47 -04:00