RdmaRingDepth.hpp File Reference

Shared BAR1-aware slot-count policy for the RDMA rings. More...

Detailed Description

Shared BAR1-aware slot-count policy for the RDMA rings.

Every pinned RDMA bounce/slot occupies the GPU's PCIe BAR1 aperture (256 MiB on most Quadros) for the card's P2P access. At large rasters (UHD2/8K ~ 32-66 MB frames) a full-depth ring on both the capture and the output side would starve the aperture, so the depth is reduced above a byte threshold. Shared by the GL and Vulkan capture and output RDMA shims so all four agree on the same policy.

Go to the source code of this file.

Classes
struct	score::gfx::interop::RdmaRingDepths

Namespaces
namespace	score
	Base toolkit upon which the software is built.
namespace	score::gfx
	Graphics rendering pipeline for ossia score.

Functions
int	score::gfx::interop::rdmaRingDepthForFrame (std::uint32_t frameByteSize, RdmaRingDepths d) noexcept

Function Documentation

rdmaRingDepthForFrame()

int score::gfx::interop::rdmaRingDepthForFrame ( std::uint32_t  frameByteSize, RdmaRingDepths  d  )

inlinenoexcept

Frames >= 32 MiB use the reduced (large) depth so the pinned slots still fit the BAR1 aperture; smaller frames use the full depth.