Qemu/kvm provides you with a plethora of ways to configure your storage devices. Yet no other type of device shows such a variance in its performance, with disk I/O throughput anywhere from stellar to abysmal using the very same hardware.
In this post I like to show some configuration options that can help improve VM disk performance. For an in-depth presentation on the latest developments and features, with hands-on examples, see Storage Performance Tuning for FAST! Virtual Machines. Continue reading “Tuning VM Disk Performance”
March 29. 2020 edit: Recently I published a tutorial using Virtual Machine Manager. You can find it here: Creating a Windows 10 VM on the AMD Ryzen 9 3900X using Qemu 4.0 and VGA Passthrough.
Before you get your hopes high, this post is not (yet?) a tutorial on creating a Windows 10 virtual machine using the Virtual Machine Manager (virt-manager) GUI. It should have been, though. I spent the better part of a week trying to configure and install a Windows 10 VM that delivers the performance that I’m used to.
As it turns out, it was a failure. Don’t get me wrong, I did manage to configure and run Windows using virt-manager and virsh. I even installed it multiple times, changing the configuration to what I hoped would improve performance. But whatever I tried, I never got even near the speed and snappiness that I achieve by following my tutorial using a start script.
Many users – myself included – rather prefer the comfort of a graphical user interface with check boxes and pull-down menus to select the various options. I’ve listed some tutorials using the virt-manager at the end, for those who came to find a solution. Continue reading “Creating a Windows 10 Virtual Machine Using the Virtual Machine Manager (virt-manager)”
You may wonder what’s wrong with this fellow (meaning me, the author). Has he completely lost his mind when he proposes a Linux virtual gaming machine? Before you discredit the idea, let me explain. Continue reading “Linux Virtual Gaming Machine”
Installing a Linux Mint 19 VM (or Ubuntu 18.04) with VGA passthrough is surprisingly straightforward. This tutorial follows the Running Windows 10 on Linux using KVM with VGA Passthrough almost step-by-step. I will therefore focus on what’s different from the above tutorial.
While booting the Linux Mint 19 life installation media (ISO) as a VM was easy, the installation of Linux Mint invariably ended with the following error:
The ‘grub-efi-amd64-signed’ package failed to install target/
The following tutorial will describe the steps to overcome this problem (bug?). Continue reading “Installing a Linux Mint 19 (Ubuntu 18.04) VM with VGA Passthrough”
Benchmarking Performance of a Virtual Machine
I have run a number of benchmarks to document the performance of Windows 10 running as a virtual machine on Linux, in the hope other PC users will dive into the fascinating world of virtualization (VFIO).
Benchmarks are helpful in comparing one system with another, and one configuration with another. I use them to optimize my Windows 10 performance and to make sure that updates/upgrades haven’t produced unwanted side effects. Continue reading “Windows 10 Virtual Machine Benchmarks”
Problem: bad 2D performance in Windows VM versus Windows on bare metal
For the past few months I noticed sluggish 2D graphics in my Windows 10 VM, something that hadn’t happened before. Below are the Passmark 8 results and comparisons between different configurations/releases: Continue reading “Low 2D Graphics Benchmark with Windows 10 (1803) KVM VM”
I’m running Linux Mint 18.3 which is based on Ubuntu 16.04 Xenial. Until yesterday I used the Personal Packet Archive ppa:jacob/virtualisation to get more up-to-date releases of Qemu, libvirt, and virt-manager.
Ubuntu and Linux Mint recently released security updates for their official (but old) qemu and libvirt packages to address the Meltdown and Spectre vulnerabilities. Unfortunately the Ubuntu 16.04 releases in the ppa:jacob/virtualisation archive have not been updated, judging from the upload date. Continue reading “Qemu and libvirt security – ppa:jacob/virtualisation”
This is yet another benchmark of my Windows 10 VM. This time I used the free Mersenne Prime Search software Prime95 (mprime under Linux) available at www.mersenne.org. I wanted to see if there is a significant difference between running the benchmark on the Linux host, versus the Windows virtual machine. Continue reading “Prime95 Benchmark: Linux Host versus Windows VM”
Benchmarks help us compare the performance of different hardware configurations as well as drivers and operating systems. With regard to virtualization, benchmarks can be particularly useful in quantifying performance differences between an operating system running on a virtual machine versus the same OS running directly on the underlying hardware. Continue reading “Windows 10 Benchmarks (Virtual Machine)”