Hi all
I’ve been working on this for two days now and I’m running out of ideas.
In summary, when I use my Windows 10 VM to copy files from an SMB share on a separate NAS, I’m seeing stuttering on the VM (mouse sticking/jumping etc) and on the UnRAID main screen, I see a single CPU core running at 100%.
I have a 10Gbe network connection on the UnRAID host to a switch which by all accounts is working well - the transfer rates are as expected. But the VM stuttering is problematic.
The network adapter is: Aquantia Corp. AQC107 NBase-T/IEEE 802.3bz Ethernet Controller
Here’s what I’ve tried so far:
New VM from scratch - same result
Using TeraCopy - actually less stuttering but half the transfer speed
Trying vmxnet3 driver instead - same result - stuttering
Tips and Tweaks - Disable flow control (no change)
Tips and Tweaks - Disable NIC offload (no change)
New VM without Passthrough - a little better, but still seeing the CPU spike
Adding more cores - but does nothing as this seems to be a single thread process
I’m at a loss. If it helps here’s the VM XML but I’ve tried all kinds of combos here to no avail:
<?xml version='1.0' encoding='UTF-8'?>
<domain type='kvm'>
<name>Windows 10 Test Passthrough</name>
<uuid>6df512b5-c2c5-d74f-2781-1ec861d63c30</uuid>
<metadata>
<vmtemplate xmlns="unraid" name="Windows 10" icon="windows.png" os="windows10"/>
</metadata>
<memory unit='KiB'>16777216</memory>
<currentMemory unit='KiB'>16777216</currentMemory>
<memoryBacking>
<nosharepages/>
</memoryBacking>
<vcpu placement='static'>8</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='6'/>
<vcpupin vcpu='1' cpuset='22'/>
<vcpupin vcpu='2' cpuset='7'/>
<vcpupin vcpu='3' cpuset='23'/>
<vcpupin vcpu='4' cpuset='8'/>
<vcpupin vcpu='5' cpuset='24'/>
<vcpupin vcpu='6' cpuset='9'/>
<vcpupin vcpu='7' cpuset='25'/>
</cputune>
<os>
<type arch='x86_64' machine='pc-q35-4.2'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi.fd</loader>
<nvram>/etc/libvirt/qemu/nvram/6df512b5-c2c5-d74f-2781-1ec861d63c30_VARS-pure-efi.fd</nvram>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' cores='4' threads='2'/>
<cache mode='passthrough'/>
<feature policy='require' name='topoext'/>
</cpu>
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
</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'/>
<source file='/mnt/disks/Samsung_SSD_970_EVO_Plus_1TB_S4EWNJ0N241749T/Windows 10 Test Passthrough/vdisk1.img'/>
<target dev='hdc' bus='virtio'/>
<boot order='1'/>
<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/Win10-TBX.iso'/>
<target dev='hda' bus='sata'/>
<readonly/>
<boot order='2'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/mnt/user/isos/VMware-tools-windows-11.0.5-15389592.iso'/>
<target dev='hdb' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='pci' index='0' model='pcie-root'/>
<controller type='pci' index='1' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='1' port='0x8'/>
<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'/>
<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'/>
<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'/>
<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'/>
<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'/>
<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'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x6'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
</controller>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:d6:75:8c'/>
<source bridge='br0'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</interface>
<serial type='pty'>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='unix'>
<target type='virtio' name='org.qemu.guest_agent.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x30' slot='0x00' function='0x0'/>
</source>
<rom file='/mnt/user/isos/Sapphire.RX570.4096.170323.rom'/>
<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x30' slot='0x00' function='0x1'/>
</source>
<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='0x2e' slot='0x00' function='0x1'/>
</source>
<address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='no'>
<source>
<vendor id='0x1462'/>
<product id='0x7c36'/>
</source>
<address type='usb' bus='0' port='1'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='no'>
<source>
<vendor id='0x1b1c'/>
<product id='0x0c0b'/>
</source>
<address type='usb' bus='0' port='2'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='no'>
<source>
<vendor id='0x1b1c'/>
<product id='0x0c19'/>
</source>
<address type='usb' bus='0' port='3'/>
</hostdev>
<memballoon model='none'/>
</devices>
</domain>
Thanks in advance for any pointers.