Using your syntax: a) PC -> Ubuntu 21.10 -> Virtualbox 6.1.30 -> Ubuntu 21.10 -> virt-manger/qemu -> Ubuntu14.04 b) PC -> Ubuntu 21.10 -> Virtualbox 6.1.30 -> Ubuntu 22.04 Mate -> virt-manger/qemu -> Ubuntu14.04 c) PC -> Ubuntu 21.10 -> Virtualbox 6.1.30 -> Ubuntu 22.04 Budgie -> GNOME-BOXES -> Ubuntu14.04 d) PC -> Ubuntu 21.10 -> Virtualbox 6.1.30 -> Ubuntu 22.04 -> virtualbox -> Ubuntu14.04
only b is slow, a, c and d are fine. If a to b is not a regression, maybe the Mate desktop is the issue. This weekend I will add gnome-boxes to b and virt-manger/qemu to c and d and let's see what happens. In my understanding up to now, kvm is the hypervisor in a,b and c, while the virtual-machine- manager and gnome boxes are used to set-up the configuration parameters used by kvm. I had the idea that qemu is the older hypervisor, that also can take care of CPUs without virtualization support, but that uses kvm for CPUs with virtualization support. Where can I read about the architecture of virt-manager/qemu/kvm and gnome- boxes/qemu?/kvm Do you have other suggestions for tests? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1953628 Title: Too high CPU load in qemu-system-x86 compared to Ubuntu 21.04/21.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1953628/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
