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[idd] scheduler: publish frames after guest cadence breaks

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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.
This commit is contained in:
Geoffrey McRae
2026-08-05 09:40:28 +10:00
parent 55f373b4ff
commit d0fa4a8ddd
1 changed files with 9 additions and 1 deletions
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10
idd/LGIdd/CFrameScheduler.cpp
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@@ -28,6 +28,7 @@ static const uint32_t MIN_LEASE_MS = 100;
static const uint32_t MAX_LEASE_MS = 5000;
static const uint64_t MIN_SAFETY_NS = 250000ULL;
static const uint64_t LOG_INTERVAL_NS = 5000000000ULL;
static const uint64_t CADENCE_BREAK = 4;
uint64_t CFrameScheduler::Nanotime()
{
@@ -308,7 +309,14 @@ void CFrameScheduler::ObserveFrame(uint64_t now)
if (m_lastArrival && now > m_lastArrival)
{
const uint64_t interval = now - m_lastArrival;
if (interval >= MIN_PERIOD_NS && interval <= MAX_PERIOD_NS)
if (m_guestPeriod && interval > m_guestPeriod * CADENCE_BREAK)
{
m_guestPeriod = 0;
m_guestJitter = 0;
m_arrivalSamples = 0;
m_forceNext = true;
}
else if (interval >= MIN_PERIOD_NS && interval <= MAX_PERIOD_NS)
{
if (!m_guestPeriod)
m_guestPeriod = interval;