30a888711b
This commit forces the DMA'd memory to be copied into the texture in the EGL on_frame handler. This avoids tearing when the LG host inevitably updates the underlying memory. We need an additional copy inside the GPU, but this is cheap compared to copying from system memory. We could have used logic to lock the memory buffer, but that would require performing DMA on every frame, which wastes memory bandwidth. This manifests as reduced frame rate when moving the mouse compared to the non-DMA implementation. We also keep multiple EGLImages, one for each DMA fd, to avoid issues with the OpenGL driver.
Looking Glass
An extremely low latency KVMFR (KVM FrameRelay) implementation for guests with VGA PCI Passthrough.
- Project Website: https://looking-glass.io
- Getting Started: https://looking-glass.io/wiki/Installation
Donations
I (Geoffrey McRae) am the primary developer behind this project and I have invested thousands of hours of development time into it.
If you like this project and find it useful and would like to help out you can support me directly using the following platforms.
Documentation
** IMPORTANT ** This project contains submodules that must be checked out if building from the git repository! If you are not a developer and just want to compile Looking Glass please download the source archive from the website instead:
https://looking-glass.io/downloads
Please also be sure to see the following files for more information
Note: The README.md files are slowly being deprecated from this project in
favor of the wiki at https://looking-glass.io/wiki, and as such the
information in these files may be dated.
Latest Version
If you would like to use the latest bleeding edge version of Looking Glass please be aware there will be no support at this time.
Latest bleeding edge builds of the Windows host application can be obtained from:
https://looking-glass.io/downloads
Help and support
Web
https://forum.level1techs.com/c/software/lookingglass/142
Discord
- Looking Glass: https://discord.gg/52SMupxkvt
- VFIO: https://discord.gg/4ahCn4c
IRC
Join us in the #LookingGlass channel on the FreeNode network