Since several months I have performance problems with my Windows 10 virtual machine. The host system (Intel Core i5 750, 2.8 GHz; 16 GB RAM; 3 TB WD Red harddisk for the VMs) with openSUSE TW (Qemu 4.0) should be strong enough to run a single Windows 10 desktop in a virtual machine. Other VMs (Linux, FreeBSD) are running without performance problems. But if I start Windows 10 as a single Qemu KVM guest system, the desktop of the host system sometimes becomes unresponsive during Windows boot. The performance of the Windows 10 desktop is bad, approximately 10-20x slower than native and the host system performance also becomes worse. I had the performance problems with Windows 10 1809. Now I installed a fresh Windows 10 1903 machine. The performance is better compared to the old VM, but also bad. I implemented the common performance hints: - enough hard disk (55 GB) and RAM (2-5 GB) and CPU cores (2) for the guest system - all available Virtio drivers (disk, network, balloon, spice, tablet) installed - disabled disk cache (currently cache='unsafe', but also tried cache='none') - HyperV options enabled (see https://bugs.launchpad.net/qemu/+bug/1775702) Here is my Windows 10 1903 quest setup: http://paste.opensuse.org/view/56376915 Does anyone has a working configuration on TW or configuration hints for me? I also wonder about the following "CLOSE WONTFIX" comment on https://bugzilla.redhat.com/show_bug.cgi?id=1690641 "For me this is fixed in the EV variant of the software." Qemu-ev is Redhat's own version of Qemu? Greetings, Björn -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org