swung0x48 aa8ef34641 [docs] (P7): magma-b3 - §7.2 records that WaitForFrameSerial can answer true for a serial the clamped floor has not reached, for the integrator to copy into §12 ...

Fable review of the B3 rework, note for CONTRACT-P7 §12. On the
disaggregated build VulkanRenderer::WaitForFrameSerial waits the FIRST
in-flight record with frameSerial >= serial, calls OnSubmitsCompletedUpTo
and returns true. With the §3.1 clamp, a later record carrying the same
serial (S2, the Present submission - the two-submissions-per-serial shape
of §2.2) keeps the floor below `serial`, so the function returns true
while IsFrameSerialComplete(serial) is false. The only caller,
WaitForTimerQueryResult, re-checks IsTimerQueryResultReady, so today it
degrades to a spurious timeout, not a wrong read.

The fix belongs to B4 and is not made here: after OnSubmitsCompletedUpTo,
return only if IsFrameSerialComplete(serial), else restart the scan (the
call erases from the vector being iterated, so restart, never continue).

2026-09-22 20:49:45 -04:00

..

Disaggregated

[docs] (P7): magma-b3 - §7.2 records that WaitForFrameSerial can answer true for a serial the clamped floor has not reached, for the integrator to copy into §12

2026-09-22 20:49:45 -04:00