Small program for switching the drivers of the second GPU between `nvidia` and `vfio`
License: GNU General Public License v3.0
Small program for switching the drivers of the second GPU, in a VFIO setup, between nvidia and vfio .
This is convenient for keeping the GPU usable (and power-managed) when not running a guest.
The program works but I've discontinued, as, after many years of VFIO, I've moved back to a dual boot solution (VFIO always need hacks, in one way or another).
Safety measure: verify that only persistenced is running when swapping to vfio.
This should have two part:
See what drivers_probe does.
It should create and enable the Systemd unit.
The guest gpu device can be figured out, so that it avoids having to pass two arguments.
This doesn't actually have any pointer to the device immediately under /dev, but a (exact) heuristic can be used for that (see below).
Notes:
$ ls -l /dev/dri/by-path
lrwxrwxrwx 1 root root 8 Aug 30 18:06 pci-0000:04:00.0-card -> ../card0
lrwxrwxrwx 1 root root 13 Aug 30 18:06 pci-0000:04:00.0-render -> ../renderD128
lrwxrwxrwx 1 root root 8 Aug 30 18:06 pci-0000:2d:00.0-card -> ../card1
lrwxrwxrwx 1 root root 13 Aug 30 18:06 pci-0000:2d:00.0-render -> ../renderD129
$ sudo lsof /dev/dri/card0
$ sudo lsof /dev/dri/renderD128
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Xorg 3444 root 22u CHR 226,128 0t0 348 /dev/dri/renderD128
Xorg 3444 root 37u CHR 226,128 0t0 348 /dev/dri/renderD128
code 14353 saverio 23u CHR 226,128 0t0 348 /dev/dri/renderD128
code 14361 saverio 23u CHR 226,128 0t0 348 /dev/dri/renderD128
$ sudo lsof /dev/nvidia0
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Xorg 3444 root mem CHR 195,0 648 /dev/nvidia0
Xorg 3444 root 17u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 18u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 19u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 24u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 25u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 28u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 29u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 30u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 34u CHR 195,0 0t0 648 /dev/nvidia0
Xorg 3444 root 35u CHR 195,0 0t0 648 /dev/nvidia0
$ sudo lsof /dev/dri/card1
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Xorg 3444 root mem CHR 226,1 503 /dev/dri/card1
Xorg 3444 root 14u CHR 226,1 0t0 503 /dev/dri/card1
Xorg 3444 root 15u CHR 226,1 0t0 503 /dev/dri/card1
$ sudo lsof /dev/dri/renderD129
Heuristic: If the card is '/dev/dri/card1' and '/dev/nvidia1' exists, then it's it; in any other case, it's '/dev/nvidia0'.
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.