Up until November 18, 2020 I would have suggested against the purchase of an AMD GPU for VFIO. But yesterday AMD launched its Radeon RX 6800 line of GPUs. Are the AMD Radeon 6800/6800XT suitable for VFIO?Continue reading “AMD Radeon 6800/6800XT for VFIO?”
All about Linux and open source software
Remote Backup Script for Windows NTFS Partitions on LVM Volumes
Linux bash script to mount and backup / synchronize a Windows 10 partition inside a LVM volume to a remote backup server using rsync and SSH
I run the bash script below to backup my Windows NTFS partitions residing on LVM volumes to a remote backup server. It uses SSH and public key authentication to authenticate at the remote side.
The script mounts an NTFS partition inside a LVM raw volume. It performs a file-based backup using rsync. It is NOT suitable for system backups!
Please carefully read the “Requirements”, “How it Works”, and “Usage” sections before attempting to use it.Continue reading “Remote Backup Script for Windows NTFS Partitions on LVM Volumes”
Why Linux Sucks
I am a Linux user for decades. I have promoted the use of Linux wherever I could. But it’s about time to say the truth: Linux sucks!
Before you draw conclusions I like to add: Microsoft Windows and Apple macOS suck even more.Continue reading “Why Linux Sucks”
Windows 10 VFIO Passthrough Configuration
I’ve been tweaking my configuration for my needs and it performs very well. As a reference, I’m posting my:
- hardware configuration
- Linux distro, kernel, etc.
- Windows VM configuration (XML)
Graphics Cards: AMD vs Nvidia
Updated on December 7, 2021
A question that frequently pops up in VFIO or GPU passthrough forums is which graphics card to buy: AMD or Nvidia? And the answer often depends on whom you ask.
Some people will tell you to stay clear of Nvidia graphics cards since their driver detects the virtual machine and quits.
Others mention the “reset bug” that’s been haunting AMD graphics cards for the last couple of years (see Wendells video interview of Linux kernel maintainer Greg Kroah-Hartman). So what’s the story?Continue reading “Graphics Cards: AMD vs Nvidia”
Creating a Windows 10 kvm VM on the AMD Ryzen 9 3900X using VGA Passthrough
Last updated: January 6, 2022
I’ve already written a detailed tutorial on Windows 10 kvm VGA passthrough based on QEMU version 2.11. Years have passed and recent distributions like Ubuntu 20.04, Linux Mint 20, or Manjaro come with QEMU 4.0, 4.2 or 5.1.
A lot has happened since version 2.11. QEMU 4.0 includes numerous changes and improvements such as trim support in the virtio-blk driver, pcie-root-port with PCIe 4.0 support (with Q35-4.0 machine type), as well as improved audio.Continue reading “Creating a Windows 10 kvm VM on the AMD Ryzen 9 3900X using VGA Passthrough”
Upgrading my PC to an AMD Ryzen 9 3900X System – Benchmarks
It wasn’t easy this time. Don’t get me wrong – the VFIO passthrough part, though challenging in some ways, went quite well. All in all I’m pleased now with the results. Here the Passmark 9.0 benchmark as uploaded onto their database (for more details, click the frame below):Continue reading “Upgrading my PC to an AMD Ryzen 9 3900X System – Benchmarks”
Upgrading my PC to an AMD Ryzen 9 3900X System
I’ve been contemplating a PC upgrade for more than a year (see my post here). At first I considered staying with Intel and getting an i9-9900K CPU with integrated GPU on a Z390 motherboard.
Along came the AMD Ryzen 9 3900X that topped the benchmarks, including the Adobe Lightroom and Photoshop benchmarks (to be precise, it ranked #4 in the Adobe Lightroom benchmark, and a narrow #1 in the Adobe Photoshop benchmark). These good news about the AMD Ryzen 3900X were soon followed by reports about BIOS issues and VFIO incompatibility. At the very least, it looked like VGA passthrough was more challenging.
Then I read Bryan Steiner’s GPU passthrough tutorial for the AMD Ryzen 9 3900X and an Ubuntu-based Pop!_OS Linux host. Several users on the VFIO Reddit forum reported successful VFIO VGA passthrough with the AMD Ryzen 9.Continue reading “Upgrading my PC to an AMD Ryzen 9 3900X System”
Hardware upgrade or what’s holding me back?
More than a year has passed since I’ve posted about building a new PC. So what is holding me back from the upgrade? Time and money are considerations, but not the reason.
On paper, the AMD Ryzen 9 has outperformed Intel in most if not all tasks. The Ryzen 9 3900X beats the Intel i9 9900K as well as the Intel i9 10900X in multi-threaded workloads. The Intel i9 9900K can barely hold its ground on single-threaded tasks. Numerous benchmarks have shown that AMD is a clear winner.Continue reading “Hardware upgrade or what’s holding me back?”
Impact of Spectre and Meltdown Protection on Virtual Machine Performance
A year ago I wrote about the 2D graphics performance impact of the Windows 10 (1803) update inside a virtual machine. As it turned out, the performance impact was related to the Spectre vulnerability patch that Microsoft had introduced. However, the same patch had practically no performance impact on a Windows 10 bare-metal installation.
Time has passed and I wanted to see if there has been any progress. Right now I’m running Windows 10 (1903) with Nvidia driver release 431.36. Windows 10 is up-to-date, Nvidia however already offers a newer version (431.60).Continue reading “Impact of Spectre and Meltdown Protection on Virtual Machine Performance”