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gnif / LookingGlass

An extremely low latency KVMFR (KVM FrameRelay) implementation for guests with VGA PCI Passthrough.
GNU General Public License v2.0
4.75k stars 261 forks source link

[doc] requirements: Add section encouraging DMABUF use for iGPUs #1117

Open JJRcop opened 7 months ago

JJRcop commented 7 months ago

Also added link in install_libvirt to the new section.

gnif commented 7 months ago

The wording needs to change a bit here. There is no "copy engine" per say under Linux, it's a DMA transfer, as such it offloads the transfer from the CPU, to the GPUs DMA hardware.

without using an intermediary buffer

It might still use one, it depends on the GPU hardware and driver implementation. iGPUs may even avoid any copy at all as they share system RAM with the GPU and could just use it directly in place (zero copy).

considered necessary for a decent experience.

I would reword this to state it is a requirement.