Kvm windows 10 slow. Still, LVM volumes remain faster. Why is my Windows 10 VM so laggy? Hi, I installed Windows 10 on a VM using virt-manager and it is very laggy. I installed spice-guest-tools. 04 it is a disaster. By default, tcg is used. My co-worker use Debian on the same PC configuration and ca Hey, I'm very new to qemu. The only issue is that my Windows 10 VM is really slow and is at 100% CPU usage. 04 was very good, but after the upgrade to Ubuntu 22. I've done testing with iperf3 to remove the network as a source of the issue and linux guests also get the full 10g speed across the network, this seems to only affect windows guests. Hey folks, I'm running a few Windows 10 with KVM using Virtio NICs and I'm noticing that even though I'm plugged into a 10G network the windows machines top at 3gb/s. It is like a low-FPS game. 04 Serve Windows 11 VM unusually slow, despite seemingly good settings Hi everyone, I'm running a Windows 11 VM on Arch Linux through virt-manager, and it's acting strangely. 4. The performance of Windows on Ubuntu 20. Is there something i can do to make the VM more responsive? Dec 29, 2019 · Also, the full qemu-system-* command-line properly contains -kvm flags so it is not doing virtualisation purely in software. 04 64-bit and KVM, my CPU is Core i5 3. I decided to use it instead of VirtualBox because you can RDP to it with better framerate. I'm using the Spice guest drivers on the virtual machine, and a virtio disk. Surprisingly both access to the disk from within the VM as Nov 4, 2020 · 1 I have a Windows 10 VM on my KVM (Libvirt) Linux machine. It's probably some stupid configuration thing somewhere, because even on my ancient virtualisation rig (rocking DDR2 memory) using ESXi I could boot Windows 7 guests in a reasonable period of time. Installing KVM paravirtualized drivers for Windows virtual machines Copy linkLink copied to clipboard! The primary method of improving the performance of your Windows virtual machines (VMs) is to install KVM paravirtualized (virtio) drivers for Windows on the guest operating system. Aug 31, 2020 · I have the problem, that whenever I try to run Windows within QEMU, it seems that disk access is becomming very slow after a short while. I have a 500GB HDD allocated to it, 16GB DDR4 RAM, and an 11th gen i5. Optimizing Windows 10 when using inside KVM 🪟 📝 Updated on 11 Feb, 2026 📖 Published on Mar 15, 2024 Feb 2, 2022 · I have several times experience a Windows VM suddenly start to run extremely slow, seems mostly related to slow storage IO. See here for more information. Mouse got fixed, but windows still drags stupidly slow. First I converted the Window. Dec 31, 2020 · Getting almost Native performance on W10 VM running on KVM Hi folks I've often mentioned using passthru on things like graphics and network cards to squeeze the maximum performance of VM's - particularly Windows VM's. On more recent Qemu versions, Qcow2 files are much faster, even when using no preallocation (or metadata-only preallocation). Feb 3, 2017 · Today I finally had the chance to swap out the motherboard and processor that I've been using with Unraid. 1. It was slow as hell compared to MS-VPC2007. When i run other VMs like any Linux Distro, the responsiveness is fairly good, almost not noticable. I use the virtio drivers for disks and network and QXL for video. Any ideas on how to troubleshoot? Aug 15, 2019 · 10 By default, qemu will ignore the presence of hardware virtualization capabilities. Opening apps or moving windows is not smooth at all. Nov 26, 2024 · Re: QEMU with Virtual Machine Manager runs slow by Bambi » Sat Nov 30, 2024 11:11 pm some years ago i was trying to run something on Qemu (old version with GUI called Qemu Manager) on Windows XP host Pentium IV which definitely has no Iommu. Then I tried vga and virtio (with/without 3d acceleration/opengl) and performance still not even close to "bare-metal". Mar 15, 2024 · A place for art, programming and humor. I run Windows 7 in KVM and it's extremely slow. Too bad ChromeOS wipes the whole disk. I have searched a lot looking for tips on how to get the QEMU/KVM VM running at an acceptable speed, but I am not finding much. With the win10 vm however, it is supper "laggy", while moving windows or moving the mouse. Jul 9, 2020 · This guide is intended for existing KVM/QEMU Libvirt setups and will help you reach near native performance on your Windows 10 or 11 Guest. This gives me the option to run VM's with hardware passthrough which I wasn't able to do before. " tcg " refers to the built-in "Tiny Code Generator" that is used to (slowly) emulate the guest CPU in software. Seen this in different versions, but in this particular case is Win10 LTS Aug 20, 2014 · I use Ubuntu 12. To quote the online documentation: Depending on the target architecture, kvm, xen, hax, hvf, whpx or tcg can be available. The windows VM worked very well on that as it had 8GB ram and 4 cores. Aug 17, 2022 · I have Windows 10 pro installed from this guide that run Docker container on Ubuntu KVM. This guide is a collection of the all interventions I could find on wikis, forums and blogs that had a measurable impact on guest performance benchmarks. I would love to dual boot -- Anyway, that is gone. When I installed windows I got very poor performance (windows don't drag smoothly, mouse feels laggy too). Mar 13, 2021 · Problem: Very slow IO in Windows Guest vs Host Hardware: HP 360 G9, 2 x 10 cores Xeon CPU, 128GB Ram, 4 x 4TB SAS HDD, Raid 10, P440 Controller (with 2GB cache and battery) Host: Ubuntu 20. 3 GHz and I have 8 GB of DDR3 RAM. My plan is to consolidate my Windows 10 pc and my Unraid server. I of course installed all the required drivers in the Windows 10 guest. Mar 6, 2015 · 5 On old Qemu/KVM versions, Qcow2 backend was very slow when not preallocated, more so if used without writeback cache enabled. rylsu cbyvmpcs phdf ehapez aoscrp jvwejdx tklah jzkuu qfvey bit