I have big trouble with kvm/libvirt Windows 10 guest on my new machine (AMD Ryzen 7 3700X, GeForce GT 710, Samsung EVO 970 Plus).
The problem may be related to the overall VM performance and/or to the graphics, but I'm not sure. The graphics is set to spice/qxl and I already installed qxldod drivers and some others from the ISO found on fedora website. The system is working so far, but there are lags, like programs taking longer to start, or (cached) websites needing 5 times as long as the host to render in Firefox. Internet speed is always fine from within the guest. In the TaskManager I can see high CPU usage for simple tasks like moving explorer windows around. That alone is annoying enough, but the worse thing is that my online banking stopped working recently. I use an optic TAN procedure with a flickering code, like demonstrated on this website (sorry for the language):
https://6xq.net/flickercodes/
Below the headline "Javascript-Flickercode" you can click at the "Start" button to simulate an optical TAN procedure. On my host this works really fast, but on my guest this animation is very slow and looks like 4 from 5 frames are being dropped. Of course I read that I can't expect bare metal performance, but since the procedure even works fine on my host via AnyDesk remotely, I doubt that this behavior is normal for virtualized environments! But I have no Idea how to fix this.
So what can I do to find the culprit and get things working? For example, I was surprised that my CPU configuration in virt-manager shows an EPYC-IBPB CPU since I have a Ryzen.
I added some information about my system. If you need more, please let me know...
Thank you very much and best regards...
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Debian 10.6
Linux server 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1+deb10u1 (2020-04-27) x86_64 GNU/LinuxCode: Select all
root@server:~# lsmod | grep kvm
kvm_amd 106496 16
kvm 749568 1 kvm_amd
irqbypass 16384 7 kvm
ccp 98304 1 kvm_amdCode: Select all
root@server:~# kvm --version
QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-8+deb10u8)
Copyright (c) 2003-2018 Fabrice Bellard and the QEMU Project developers
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<domain type='kvm' id='4'>
<name>Windows</name>
<uuid>15c245a1-6356-3e12-876c-87a30c55f136</uuid>
<metadata>
<libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
<libosinfo:os id="http://microsoft.com/win/10"/>
</libosinfo:libosinfo>
</metadata>
<memory unit='KiB'>8388608</memory>
<currentMemory unit='KiB'>8388608</currentMemory>
<vcpu placement='static' current='8'>16</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-q35-3.1'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
</hyperv>
<vmport state='off'/>
</features>
<cpu mode='custom' match='exact' check='full'>
<model fallback='forbid'>EPYC-IBPB</model>
<vendor>AMD</vendor>
<feature policy='require' name='x2apic'/>
<feature policy='require' name='tsc-deadline'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clwb'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='cmp_legacy'/>
<feature policy='require' name='perfctr_core'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='disable' name='monitor'/>
<feature policy='disable' name='svm'/>
<feature policy='require' name='topoext'/>
</cpu>
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/Windows.qcow2'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
</disk>
<disk type='block' device='cdrom'>
<driver name='qemu' type='raw'/>
<source dev='/dev/sr0'/>
<backingStore/>
<target dev='sdb' bus='sata'/>
<readonly/>
<alias name='sata0-0-1'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='usb' index='0' model='qemu-xhci' ports='15'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
</controller>
<controller type='sata' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pcie-root'>
<alias name='pcie.0'/>
</controller>
<controller type='pci' index='1' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='1' port='0x10'/>
<alias name='pci.1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
</controller>
<controller type='pci' index='2' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='2' port='0x11'/>
<alias name='pci.2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
</controller>
<controller type='pci' index='3' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='3' port='0x12'/>
<alias name='pci.3'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
</controller>
<controller type='pci' index='4' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='4' port='0x13'/>
<alias name='pci.4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
</controller>
<interface type='bridge'>
<mac address='78:45:c4:4b:1e:c2'/>
<source bridge='bridge0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/0'/>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/0'>
<source path='/dev/pts/0'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='tablet' bus='usb'>
<alias name='input0'/>
<address type='usb' bus='0' port='1'/>
</input>
<input type='mouse' bus='ps2'>
<alias name='input1'/>
</input>
<input type='keyboard' bus='ps2'>
<alias name='input2'/>
</input>
<graphics type='spice' port='5900' autoport='yes' listen='127.0.0.1'>
<listen type='address' address='127.0.0.1'/>
<image compression='off'/>
</graphics>
<sound model='ich9'>
<alias name='sound0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1b' function='0x0'/>
</sound>
<video>
<model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
</video>
<redirdev bus='usb' type='spicevmc'>
<alias name='redir0'/>
<address type='usb' bus='0' port='2'/>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
<alias name='redir1'/>
<address type='usb' bus='0' port='3'/>
</redirdev>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='apparmor' relabel='yes'>
<label>libvirt-15c245a1-6356-3e12-876c-87a30c55f136</label>
<imagelabel>libvirt-15c245a1-6356-3e12-876c-87a30c55f136</imagelabel>
</seclabel>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+64055:+64055</label>
<imagelabel>+64055:+64055</imagelabel>
</seclabel>
</domain>
