7e58278858
It appears that the PCI BAR memory is slow to access with remap_pfn_range and that it should instead be faulted in one page at a time. The commit 5774e219651da3b9bacf9eafd87ae39d75a5eea7 implemented the former behaviour and caused a performance regression in the VM->VM case. This commit retores the old behaviour, but extends it to support mmaping the kvmfr device directly, without going through a dmabuf.
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