Replace the shared force and republish booleans with request tickets.
A completed publication now acknowledges only requests captured when it
began, so a concurrent immediate or cadence-break request survives.
Treat a forced publication as periodic once the normal pre-deadline
send point is due. This prevents an immediate forced copy from being
followed by another copy for the same cadence slot.
Keep the client schedule floor at 2 ms while accepting shorter guest
frame intervals for cadence tracking. This lets sources above 500 Hz
trigger immediate final-frame delivery when their cadence breaks.
Derive the source rate from unique frames observed over the actual log
interval. The old EWMA discarded intervals below 2 ms, capping the
reported rate at 500 Hz and understating high-rate sources.
Prepare each acquired content frame into one of two private GPU
candidates so the IddCx frame can be released without copying it to
IVSHMEM immediately.
Wake a high-resolution publisher at the client deadline and send the
newest completed candidate. Preserve accumulated damage across
superseded candidates, include the scheduling hold in end-to-end timing,
and keep transport work on the existing physical copy queue.
Discard the learned guest arrival period when a frame follows a gap
much larger than expected. Force that frame through and relearn the
arrival rate so sparse updates are not held for a frame that never
arrives.
