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Poor performance on Win11 VM

bally12345
in VM Engine (KVM)

Featured Replies

Not sure what is going on but I have noticed since upgrading to V7.3.1 my Win11 VM is running weirdly, its slow and laggy.

Is it still the case when you add GPU passthru you need to configure using XML mode or can you do it all through the gui now? This VM has been setup for about 4 years at a guess, using spaceinvader video. Not sure if the XML is the issue or its OS level fault.

<?xml version='1.0' encoding='UTF-8'?>
<domain type='kvm' id='5'>
	<name>Windows 11</name>
	<uuid>996dd70b-875d-f9ba-0d9c-b1cd88f2825a</uuid>
	<metadata>
		<vmtemplate
			xmlns="unraid" name="Windows 11" icon="windows11.png" os="windowstpm" iconold="windows11.png" webui=""/>
		</metadata>
		<memory unit='KiB'>16777216</memory>
		<currentMemory unit='KiB'>16777216</currentMemory>
		<memoryBacking>
			<nosharepages/>
		</memoryBacking>
		<vcpu placement='static'>10</vcpu>
		<cputune>
			<vcpupin vcpu='0' cpuset='2'/>
			<vcpupin vcpu='1' cpuset='3'/>
			<vcpupin vcpu='2' cpuset='4'/>
			<vcpupin vcpu='3' cpuset='5'/>
			<vcpupin vcpu='4' cpuset='6'/>
			<vcpupin vcpu='5' cpuset='7'/>
			<vcpupin vcpu='6' cpuset='8'/>
			<vcpupin vcpu='7' cpuset='9'/>
			<vcpupin vcpu='8' cpuset='10'/>
			<vcpupin vcpu='9' cpuset='11'/>
			<emulatorpin cpuset='0-1'/>
		</cputune>
		<resource>
			<partition>/machine</partition>
		</resource>
		<os>
			<type arch='x86_64' machine='pc-q35-10.2'>hvm</type>
			<loader readonly='yes' type='pflash' format='raw'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi-tpm.fd</loader>
			<nvram format='raw'>/etc/libvirt/qemu/nvram/996dd70b-875d-f9ba-0d9c-b1cd88f2825a_VARS-pure-efi-tpm.fd</nvram>
		</os>
		<features>
			<acpi/>
			<apic/>
			<hyperv mode='custom'>
				<relaxed state='on'/>
				<vapic state='on'/>
				<spinlocks state='on' retries='8191'/>
				<vpindex state='on'/>
				<synic state='on'/>
				<stimer state='on'/>
				<vendor_id state='on' value='none'/>
			</hyperv>
		</features>
		<cpu mode='host-passthrough' check='none' migratable='on'>
			<topology sockets='1' dies='1' clusters='1' cores='5' threads='2'/>
			<cache mode='passthrough'/>
		</cpu>
		<clock offset='localtime'>
			<timer name='hpet' present='no'/>
			<timer name='hypervclock' present='yes'/>
		</clock>
		<on_poweroff>destroy</on_poweroff>
		<on_reboot>restart</on_reboot>
		<on_crash>restart</on_crash>
		<devices>
			<emulator>/usr/local/sbin/qemu</emulator>
			<disk type='file' device='disk'>
				<driver name='qemu' type='raw' cache='writeback' discard='unmap'/>
				<source file='/mnt/cache/domains/Windows 10/vdisk1.img' index='2'/>
				<backingStore/>
				<target dev='hdc' bus='virtio'/>
				<serial>vdisk1</serial>
				<boot order='1'/>
				<alias name='virtio-disk2'/>
				<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
			</disk>
			<disk type='file' device='cdrom'>
				<driver name='qemu' type='raw'/>
				<source file='/mnt/user/iso/virtio-win-0.1.285-1.iso' index='1'/>
				<backingStore/>
				<target dev='hdb' bus='scsi'/>
				<readonly/>
				<alias name='scsi0-0-0-1'/>
				<address type='drive' controller='0' bus='0' target='0' unit='1'/>
			</disk>
			<controller type='scsi' index='0' model='virtio-scsi'>
				<alias name='scsi0'/>
				<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
			</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='0x8'/>
				<alias name='pci.1'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0' multifunction='on'/>
			</controller>
			<controller type='pci' index='2' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='2' port='0x9'/>
				<alias name='pci.2'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
			</controller>
			<controller type='pci' index='3' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='3' port='0xa'/>
				<alias name='pci.3'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
			</controller>
			<controller type='pci' index='4' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='4' port='0xb'/>
				<alias name='pci.4'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x3'/>
			</controller>
			<controller type='pci' index='5' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='5' port='0xc'/>
				<alias name='pci.5'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x4'/>
			</controller>
			<controller type='pci' index='6' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='6' port='0xd'/>
				<alias name='pci.6'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x5'/>
			</controller>
			<controller type='pci' index='7' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='7' port='0xe'/>
				<alias name='pci.7'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x6'/>
			</controller>
			<controller type='pci' index='8' model='pcie-root-port'>
				<model name='pcie-root-port'/>
				<target chassis='8' port='0xf'/>
				<alias name='pci.8'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x7'/>
			</controller>
			<controller type='sata' index='0'>
				<alias name='ide'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
			</controller>
			<controller type='virtio-serial' index='0'>
				<alias name='virtio-serial0'/>
				<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
			</controller>
			<controller type='usb' index='0' model='qemu-xhci' ports='15'>
				<alias name='usb'/>
				<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
			</controller>
			<interface type='bridge'>
				<mac address='52:54:00:62:97:d2'/>
				<source bridge='br0'/>
				<target dev='vnet4'/>
				<model type='virtio-net'/>
				<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>
			<channel type='unix'>
				<source mode='bind' path='/run/libvirt/qemu/channel/5-Windows 11/org.qemu.guest_agent.0'/>
				<target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>
				<alias name='channel0'/>
				<address type='virtio-serial' controller='0' bus='0' port='1'/>
			</channel>
			<input type='mouse' bus='ps2'>
				<alias name='input0'/>
			</input>
			<input type='keyboard' bus='ps2'>
				<alias name='input1'/>
			</input>
			<tpm model='tpm-tis'>
				<backend type='emulator' version='2.0' persistent_state='yes'/>
				<alias name='tpm0'/>
			</tpm>
			<audio id='1' type='none'/>
			<hostdev mode='subsystem' type='pci' managed='yes'>
				<driver name='vfio'/>
				<source>
					<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
				</source>
				<alias name='hostdev0'/>
				<rom file='/mnt/user/iso/vbios/GTX1650-mod.rom'/>
				<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
			</hostdev>
			<hostdev mode='subsystem' type='pci' managed='yes'>
				<driver name='vfio'/>
				<source>
					<address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
				</source>
				<alias name='hostdev1'/>
				<address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
			</hostdev>
			<watchdog model='itco' action='reset'>
				<alias name='watchdog0'/>
			</watchdog>
			<memballoon model='none'/>
		</devices>
		<seclabel type='dynamic' model='dac' relabel='yes'>
			<label>+0:+100</label>
			<imagelabel>+0:+100</imagelabel>
		</seclabel>
	</domain>

In the log

2026-06-20 09:13:25.384+0000: Domain id=7 is tainted: high-privileges
char device redirected to /dev/pts/0 (label charserial0)
2026-06-20T09:13:27.952700Z qemu-system-x86_64: warning: vfio_container_dma_map(0x14977b3d0d80, 0x382000000000, 0x10000000, 0x149760000000) = -22 (Invalid argument)
0000:01:00.0: PCI peer-to-peer transactions on BARs are not supported.

GPT and Grok said disable Resizable BAR in BIOS but that was already disabled and BIOS settings are unchanged also. Want just rule out config issue before I nuke the windows install and start again.

  • Quote
    • Author

    Graphics card is on 01.00.0 and sound card on 01.00.1

    image.png

  • Quote
    • Author

    server-diagnostics-20260625-0814.zip

    I have attached diagnositcs, anyone able to see if there is something very obviously wrong?

    also fixed the passthrough I believe but made no difference

    <?xml version='1.0' encoding='UTF-8'?>
<domain type='kvm' id='5'>
	<name>Windows 11</name>
	<uuid>996dd70b-875d-f9ba-0d9c-b1cd88f2825a</uuid>
	<metadata>
		<vmtemplate xmlns="unraid" name="Windows 11" icon="windows11.png" os="windowstpm" iconold="windows11.png" webui=""/>
	</metadata>
	<memory unit='KiB'>16777216</memory>
	<currentMemory unit='KiB'>16777216</currentMemory>
	<memoryBacking>
		<nosharepages/>
	</memoryBacking>
	<vcpu placement='static'>10</vcpu>
	<cputune>
		<vcpupin vcpu='0' cpuset='2'/>
		<vcpupin vcpu='1' cpuset='3'/>
		<vcpupin vcpu='2' cpuset='4'/>
		<vcpupin vcpu='3' cpuset='5'/>
		<vcpupin vcpu='4' cpuset='6'/>
		<vcpupin vcpu='5' cpuset='7'/>
		<vcpupin vcpu='6' cpuset='8'/>
		<vcpupin vcpu='7' cpuset='9'/>
		<vcpupin vcpu='8' cpuset='10'/>
		<vcpupin vcpu='9' cpuset='11'/>
		<emulatorpin cpuset='0-1'/>
	</cputune>
	<resource>
		<partition>/machine</partition>
	</resource>
	<os>
		<type arch='x86_64' machine='pc-q35-10.2'>hvm</type>
		<loader readonly='yes' type='pflash' format='raw'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi-tpm.fd</loader>
		<nvram format='raw'>/etc/libvirt/qemu/nvram/996dd70b-875d-f9ba-0d9c-b1cd88f2825a_VARS-pure-efi-tpm.fd</nvram>
	</os>
	<features>
		<acpi/>
		<apic/>
		<hyperv mode='custom'>
			<relaxed state='on'/>
			<vapic state='on'/>
			<spinlocks state='on' retries='8191'/>
			<vpindex state='on'/>
			<synic state='on'/>
			<stimer state='on'/>
			<vendor_id state='on' value='none'/>
		</hyperv>
		<kvm>
			<hidden state='on'/>
		</kvm>
		<vmport state='off'/>
		<ioapic driver='kvm'/>
	</features>
	<cpu mode='host-passthrough' check='none' migratable='on'>
		<topology sockets='1' dies='1' clusters='1' cores='5' threads='2'/>
		<cache mode='passthrough'/>
	</cpu>
	<clock offset='localtime'>
		<timer name='hpet' present='no'/>
		<timer name='hypervclock' present='yes'/>
	</clock>
	<on_poweroff>destroy</on_poweroff>
	<on_reboot>restart</on_reboot>
	<on_crash>restart</on_crash>
	<devices>
		<emulator>/usr/local/sbin/qemu</emulator>
		<disk type='file' device='disk'>
			<driver name='qemu' type='raw' cache='writeback' discard='unmap'/>
			<source file='/mnt/cache/domains/Windows 10/vdisk1.img' index='2'/>
			<backingStore/>
			<target dev='hdc' bus='virtio'/>
			<serial>vdisk1</serial>
			<boot order='1'/>
			<alias name='virtio-disk2'/>
			<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
		</disk>
		<disk type='file' device='cdrom'>
			<driver name='qemu' type='raw'/>
			<source file='/mnt/user/iso/virtio-win-0.1.285-1.iso' index='1'/>
			<backingStore/>
			<target dev='hdb' bus='scsi'/>
			<readonly/>
			<alias name='scsi0-0-0-1'/>
			<address type='drive' controller='0' bus='0' target='0' unit='1'/>
		</disk>
		<controller type='scsi' index='0' model='virtio-scsi'>
			<alias name='scsi0'/>
			<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
		</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='0x8'/>
			<alias name='pci.1'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0' multifunction='on'/>
		</controller>
		<controller type='pci' index='2' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='2' port='0x9'/>
			<alias name='pci.2'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
		</controller>
		<controller type='pci' index='3' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='3' port='0xa'/>
			<alias name='pci.3'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
		</controller>
		<controller type='pci' index='4' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='4' port='0xb'/>
			<alias name='pci.4'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x3'/>
		</controller>
		<controller type='pci' index='5' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='5' port='0xc'/>
			<alias name='pci.5'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x4'/>
		</controller>
		<controller type='pci' index='6' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='6' port='0xd'/>
			<alias name='pci.6'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x5'/>
		</controller>
		<controller type='pci' index='7' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='7' port='0xe'/>
			<alias name='pci.7'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x6'/>
		</controller>
		<controller type='pci' index='8' model='pcie-root-port'>
			<model name='pcie-root-port'/>
			<target chassis='8' port='0xf'/>
			<alias name='pci.8'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x7'/>
		</controller>
		<controller type='sata' index='0'>
			<alias name='ide'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
		</controller>
		<controller type='virtio-serial' index='0'>
			<alias name='virtio-serial0'/>
			<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
		</controller>
		<controller type='usb' index='0' model='qemu-xhci' ports='15'>
			<alias name='usb'/>
			<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
		</controller>
		<interface type='bridge'>
			<mac address='52:54:00:62:97:d2'/>
			<source bridge='br0'/>
			<target dev='vnet4'/>
			<model type='virtio-net'/>
			<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>
		<channel type='unix'>
			<source mode='bind' path='/run/libvirt/qemu/channel/5-Windows 11/org.qemu.guest_agent.0'/>
			<target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>
			<alias name='channel0'/>
			<address type='virtio-serial' controller='0' bus='0' port='1'/>
		</channel>
		<input type='mouse' bus='ps2'>
			<alias name='input0'/>
		</input>
		<input type='keyboard' bus='ps2'>
			<alias name='input1'/>
		</input>
		<tpm model='tpm-tis'>
			<backend type='emulator' version='2.0' persistent_state='yes'/>
			<alias name='tpm0'/>
		</tpm>
		<hostdev mode='subsystem' type='pci' managed='yes'>
			<driver name='vfio'/>
			<source>
				<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
			</source>
			<alias name='hostdev0'/>
			<rom file='/mnt/user/iso/vbios/GTX1650-mod.rom'/>
			<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0' multifunction='on'/>
		</hostdev>
		<hostdev mode='subsystem' type='pci' managed='yes'>
			<driver name='vfio'/>
			<source>
				<address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
			</source>
			<alias name='hostdev1'/>
			<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x1'/>
		</hostdev>
		<watchdog model='itco' action='reset'>
			<alias name='watchdog0'/>
		</watchdog>
		<memballoon model='none'/>
	</devices>
	<seclabel type='dynamic' model='dac' relabel='yes'>
		<label>+0:+100</label>
		<imagelabel>+0:+100</imagelabel>
	</seclabel>
</domain>
  • Quote
    • Author

    Created a new VM and copied everything across and seems to be working great so not sure whats going on with the original VM, whethers its OS issue or VM config.

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