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[client/host/idd/lgmp] add additional timing metrics

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This commit is contained in:
Geoffrey McRae
2026-08-03 10:57:32 +10:00
parent 3035fa6282
commit 7533c855c2
18 changed files with 339 additions and 88 deletions
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47
common/include/common/KVMFR.h
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@@ -25,11 +25,12 @@
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include "types.h"
#include "LGMPConfig.h"
#define KVMFR_MAGIC "KVMFR---"
#define KVMFR_VERSION 23
#define KVMFR_VERSION 24
// Fallback used by producers that cannot report the source display's SDR
// white level. IDD frames override this with IDDCX_METADATA2::SdrWhiteLevel.
@@ -165,6 +166,11 @@ typedef uint32_t KVMFRFrameFlags;
typedef struct KVMFRFrame
{
/*
* Keep the fields consumed for every frame in the first cache line. The
* timing and HDR metadata below are diagnostic/conditional, while the large
* damage rectangle array is deliberately last.
*/
uint32_t formatVer; // the frame format version number
uint32_t frameSerial; // the unique frame number
FrameType type; // the frame data type
@@ -178,9 +184,28 @@ typedef struct KVMFRFrame
uint32_t stride; // the row stride (zero if compressed data)
uint32_t pitch; // the row pitch (stride in bytes or the compressed frame size)
uint32_t offset; // offset from the start of this header to the FrameBuffer header
uint32_t damageRectsCount; // the number of damage rectangles (zero for full-frame damage)
FrameDamageRect damageRects[KVMFR_MAX_DAMAGE_RECTS];
KVMFRFrameFlags flags; // bit field combination of FRAME_FLAG_*
uint32_t damageRectsCount; // the number of damage rectangles (zero for full-frame damage)
// White level in nits for SDR content composited into an HDR frame, such as
// the hardware cursor. Valid for all frames; SDR modes normally report 80.
uint32_t sdrWhiteLevel;
/*
* Producer stage durations in nanoseconds. These are durations rather than
* absolute timestamps because the producer runs in a VM whose monotonic
* clock has a different epoch from the client. Durations can safely be
* combined with the client's local render duration for an end-to-end
* processing time.
*/
uint64_t captureTime;
uint64_t postProcessTime;
uint64_t copyTime;
// Published after the timing fields and matched against frameSerial by the
// client. timingValid is written last by the producer.
uint32_t timingSerial;
uint32_t timingValid;
// HDR static metadata (valid when FRAME_FLAG_HDR_METADATA is set)
// Display color primaries in 0.00002 units (SMPTE ST 2086 format)
@@ -195,12 +220,22 @@ typedef struct KVMFRFrame
uint32_t hdrMaxContentLightLevel; // MaxCLL (cd/m²)
uint32_t hdrMaxFrameAverageLightLevel; // MaxFALL (cd/m²)
// White level in nits for SDR content composited into an HDR frame, such as
// the hardware cursor. Valid for all frames; SDR modes normally report 80.
uint32_t sdrWhiteLevel;
FrameDamageRect damageRects[KVMFR_MAX_DAMAGE_RECTS];
}
KVMFRFrame;
#if defined(__cplusplus)
static_assert(offsetof(KVMFRFrame, captureTime) == 64,
"KVMFRFrame hot fields must fit in one cache line");
static_assert(offsetof(KVMFRFrame, damageRects) == 128,
"KVMFRFrame damage rectangles must be cache-line aligned");
#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
_Static_assert(offsetof(KVMFRFrame, captureTime) == 64,
"KVMFRFrame hot fields must fit in one cache line");
_Static_assert(offsetof(KVMFRFrame, damageRects) == 128,
"KVMFRFrame damage rectangles must be cache-line aligned");
#endif
typedef struct KVMFRMessage
{
KVMFRMessageType type;