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[client/host/idd/obs] scheduler: validate phase feedback

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Bump KVMFR to version 28 and attach generation, epoch, and deadline
identities to cadence deliveries and their timing records.

Accept phase corrections only for the exact completed publication. Keep
VM and client clocks independent by exchanging relative phase errors.

Make submission, completion, and work-estimate accounting best effort
so scheduler state cannot delay GPU submission or frame publication.
This commit is contained in:
Geoffrey McRae
2026-08-06 16:05:05 +10:00
parent 983cf588e3
commit 515f4ba06f
16 changed files with 688 additions and 235 deletions
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7
client/include/interface/transport.h
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@@ -96,6 +96,10 @@ typedef uint32_t LG_TransportFrameFlags;
typedef struct LG_TransportFrameTiming
{
bool valid; /* producer fields below are available and coherent */
bool phaseValid;
uint32_t scheduleGeneration;
uint32_t scheduleEpoch;
uint32_t scheduleDeadlineSerial;
uint64_t captureTime;
uint64_t postProcessTime;
uint64_t copyTime;
@@ -134,8 +138,8 @@ typedef struct LG_TransportFrame
{
uint64_t serial;
uint64_t timestamp;
uint32_t scheduleGeneration;
uint32_t scheduleEpoch;
uint32_t scheduleDeadlineSerial;
LG_TransportFrameFlags flags;
bool scheduleOwner;
// Backend-owned immutable metadata, valid until releaseFrame.
@@ -216,6 +220,7 @@ typedef struct LG_TransportControl
int64_t phaseError;
uint32_t feedbackFrameSerial;
uint32_t feedbackScheduleEpoch;
uint32_t feedbackDeadlineSerial;
uint32_t lease;
}
frameSchedule;