MacroX
August 6, 2020, 3:15pm
1
Hello,
I follow some tutorials in order to have a GPU Passthrough setup…
But I see in game, that my FPS become low (2FPS…) I don’t know why.
Can you help me in order to solve my problem please?
For your information my setup is the follow:
VM:
I create a raw disk in order to install it in the SSD.
This is the XML configuration:
<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">
<name>win10</name>
<uuid>XXXXXXXXX</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">16646144</memory>
<currentMemory unit="KiB">16646144</currentMemory>
<vcpu placement="static">6</vcpu>
<cputune>
<vcpupin vcpu="0" cpuset="1"/>
<vcpupin vcpu="1" cpuset="5"/>
<vcpupin vcpu="2" cpuset="2"/>
<vcpupin vcpu="3" cpuset="6"/>
<emulatorpin cpuset="0,4"/>
</cputune>
<os>
<type arch="x86_64" machine="pc-i440fx-4.2">hvm</type>
<loader readonly="yes" type="pflash">/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/win10_VARS.fd</nvram>
<boot dev="hd"/>
<bootmenu enable="no"/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state="on"/>
<vapic state="on"/>
<spinlocks state="on" retries="8191"/>
<vendor_id state="on" value="10DE"/>
</hyperv>
<kvm>
<hidden state="on"/>
</kvm>
<vmport state="off"/>
</features>
<cpu mode="host-passthrough" check="none">
<topology sockets="1" dies="1" cores="3" 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"/>
<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="raw" cache="writeback" io="threads"/>
<source file="/home/bryan/Downloads/windows.img"/>
<target dev="vda" bus="virtio"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x08" function="0x0"/>
</disk>
<disk type="file" device="cdrom">
<driver name="qemu" type="raw"/>
<source file="/var/lib/libvirt/images/Win10_1903_V1_French_x64.iso"/>
<target dev="sdb" bus="sata"/>
<readonly/>
<address type="drive" controller="0" bus="0" target="0" unit="1"/>
</disk>
<disk type="file" device="cdrom">
<driver name="qemu" type="raw"/>
<source file="/home/bryan/Downloads/virtio-win-0.1.185.iso"/>
<target dev="sdc" bus="sata"/>
<readonly/>
<address type="drive" controller="0" bus="0" target="0" unit="2"/>
</disk>
<disk type="file" device="cdrom">
<driver name="qemu" type="raw"/>
<source file="/home/bryan/Downloads/virtio-win-0.1.185.iso"/>
<target dev="hda" bus="ide"/>
<readonly/>
<address type="drive" controller="0" bus="0" target="0" unit="0"/>
</disk>
<controller type="usb" index="0" model="qemu-xhci" ports="15">
<address type="pci" domain="0x0000" bus="0x00" slot="0x05" function="0x0"/>
</controller>
<controller type="pci" index="0" model="pci-root"/>
<controller type="ide" index="0">
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x1"/>
</controller>
<controller type="sata" index="0">
<address type="pci" domain="0x0000" bus="0x00" slot="0x06" function="0x0"/>
</controller>
<controller type="virtio-serial" index="0">
<address type="pci" domain="0x0000" bus="0x00" slot="0x07" function="0x0"/>
</controller>
<interface type="network">
<mac address="52:54:00:17:ea:8a"/>
<source network="default"/>
<model type="e1000e"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" 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="spicevmc">
<target type="virtio" name="com.redhat.spice.0"/>
<address type="virtio-serial" controller="0" bus="0" port="1"/>
</channel>
<input type="mouse" bus="ps2"/>
<input type="keyboard" bus="ps2"/>
<graphics type="spice" autoport="yes" listen="127.0.0.1">
<listen type="address" address="127.0.0.1"/>
<image compression="off"/>
<gl enable="no" rendernode="/dev/dri/by-path/pci-0000:01:00.0-render"/>
</graphics>
<video>
<model type="qxl" ram="65536" vram="65536" vgamem="16384" heads="1" primary="yes"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0"/>
</video>
<hostdev mode="subsystem" type="pci" managed="yes">
<source>
<address domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
</source>
<address type="pci" domain="0x0000" bus="0x00" slot="0x09" function="0x0"/>
</hostdev>
<hostdev mode="subsystem" type="pci" managed="yes">
<source>
<address domain="0x0000" bus="0x04" slot="0x00" function="0x1"/>
</source>
<address type="pci" domain="0x0000" bus="0x00" slot="0x0a" function="0x0"/>
</hostdev>
<hostdev mode="subsystem" type="usb" managed="yes">
<source>
<vendor id="0x0c76"/>
<product id="0x161f"/>
</source>
<address type="usb" bus="0" port="4"/>
</hostdev>
<redirdev bus="usb" type="spicevmc">
<address type="usb" bus="0" port="2"/>
</redirdev>
<redirdev bus="usb" type="spicevmc">
<address type="usb" bus="0" port="3"/>
</redirdev>
<memballoon model="virtio">
<address type="pci" domain="0x0000" bus="0x00" slot="0x0b" function="0x0"/>
</memballoon>
</devices>
<qemu:commandline>
<qemu:arg value="-audiodev"/>
<qemu:arg value="pa,id=snd0,server=/run/user/1000/pulse/native"/>
<qemu:arg value="-object"/>
<qemu:arg value="input-linux,id=mouse1,evdev=/dev/input/by-id/MYMOUSE"/>
<qemu:arg value="-object"/>
<qemu:arg value="input-linux,id=kbd1,evdev=/dev/input/by-id/usb-MYKEYBOARD,grab_all=on,repeat=on"/>
</qemu:commandline>
</domain>
I don’t know how improve my speed on the game… So if you have any idea thanks .
MacroX:
I could be wrong, but it seems to me that you are still using QXL virtual graphic VGA instead of your 980Ti GPU. When your windows vm boots up, did you see video via Spice? or you see it on the Monitor connect to your 980Ti?
MacroX
August 6, 2020, 4:00pm
3
Hello, Thanks for your quick reply, When my windows boots up I see into the monitor connected to my 980Ti.
More when I play a game I see the graph of usage of my 980Ti.
MacroX
August 6, 2020, 8:15pm
4
When I played a game, I have this on my host
More in my windows the GPU is up to 100%
MacroX
August 11, 2020, 3:11pm
5
Hello, Someone has any advices for me please?
I think my CPU pinning is not good because the CPU is always to 100% when I play.
<domain type='kvm' id='1' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>Windows</name>
<uuid>UID</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'>16777216</memory>
<currentMemory unit='KiB'>16777216</currentMemory>
<vcpu placement='static'>4</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-4.2'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/Windows_VARS.fd</nvram>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='10DE'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
<vmport state='off'/>
</features>
<cpu mode='host-passthrough' check='partial'/>
<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='raw' cache='writethrough' io='threads'/>
<source file='/home/bryan/windows.img' index='4'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/bryan/Desktop/Win10_1903_V1_French_x64.iso' index='3'/>
<backingStore/>
<target dev='sdb' bus='sata'/>
<readonly/>
<alias name='sata0-0-1'/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/bryan/Downloads/virtio-win-0.1.185.iso' index='2'/>
<backingStore/>
<target dev='sdc' bus='sata'/>
<readonly/>
<alias name='sata0-0-2'/>
<address type='drive' controller='0' bus='0' target='0' unit='2'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/bryan/Downloads/virtio-win-0.1.185.iso' index='1'/>
<backingStore/>
<target dev='hda' bus='ide'/>
<readonly/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='qemu-xhci' ports='15'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='sata' index='0'>
<alias name='sata0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<alias name='virtio-serial0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</controller>
<interface type='network'>
<mac address='52:54:00:27:10:13'/>
<source network='default' portid='f74267d4-3c90-4970-9cc2-4413a2611265' bridge='virbr0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/1'/>
<target type='isa-serial' port='0'>
<model name='isa-serial'/>
</target>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<channel type='spicevmc'>
<target type='virtio' name='com.redhat.spice.0' state='disconnected'/>
<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>
<sound model='ich9'>
<alias name='sound0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</sound>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</source>
<alias name='hostdev0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' 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='0x00' slot='0x09' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x18a5'/>
<product id='0x0237'/>
<address bus='1' device='4'/>
</source>
<alias name='hostdev2'/>
<address type='usb' bus='0' port='1'/>
</hos tdev>
<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='0x00' slot='0x0a' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='selinux' relabel='yes'>
<label>system_u:system_r:svirt_t:s0:c222,c751</label>
<imagelabel>system_u:object_r:svirt_image_t:s0:c222,c751</imagelabel>
</seclabel>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+1000:+36</label>
<imagelabel>+1000:+36</imagelabel>
</seclabel>
<qemu:commandline>
<qemu:arg value='-cpu'/>
<qemu:arg value='host,hv_time,kvm=off,hv_vendor_id=null'/>
<qemu:arg value='-object'/>
<qemu:arg value='input-linux,id=mouse1,evdev=/dev/input/by-id/usb-MYMOUSE'/>
<qemu:arg value='-object'/>
<qemu:arg value='input-linux,id=kbd1,evdev=/dev/input/by-id/usb-MYKEYBOARD,grab_all=on,repeat=on'/>
</qemu:commandline>
</domain>
Someone can help me with CPU pinning please? i have a I7 6700K…
Thanks a lot.
I am not familiar with Fedora, do not know what version of Windows nor Linux kernel version could have impacted on this. But maybe it’s good idea to first pin down possible cause. Does high CPU and full GPU usage only happen when you play games or only a specific game? Does high CPU usage still happen if you don’t passthrough gpu to vm? Maybe try to reinstall Nvidia driver?
As far as I understand the instructions in the Arch wiki your CPU pinning is wrong since the emulator CPUs are not be included into the number of vcpus.
Instead of:
<vcpu placement="static">6</vcpu>
<cputune>
<vcpupin vcpu="0" cpuset="1"/>
<vcpupin vcpu="1" cpuset="5"/>
<vcpupin vcpu="2" cpuset="2"/>
<vcpupin vcpu="3" cpuset="6"/>
<emulatorpin cpuset="0,4"/>
</cputune>
Please try:
<vcpu placement="static">4</vcpu>
<cputune>
<vcpupin vcpu="0" cpuset="1"/>
<vcpupin vcpu="1" cpuset="5"/>
<vcpupin vcpu="2" cpuset="2"/>
<vcpupin vcpu="3" cpuset="6"/>
<emulatorpin cpuset="0,4"/>
</cputune>
if you want to use 4 vcpus or something like:
<vcpu placement="static">6</vcpu>
<cputune>
<vcpupin vcpu="0" cpuset="1"/>
<vcpupin vcpu="1" cpuset="5"/>
<vcpupin vcpu="2" cpuset="2"/>
<vcpupin vcpu="3" cpuset="6"/>
<vcpupin vcpu="4" cpuset="3"/>
<vcpupin vcpu="5" cpuset="7"/>
<emulatorpin cpuset="0,4"/>
</cputune>
if you want to use 6 vcpus.
Edit: Can you please provide the output of lscpu -e
MacroX
August 12, 2020, 5:12pm
8
Hello thanks for your answer
So the game is : Fornite, I tried Call of Modern warfare remastered and I have the same behavior.
The output of the command is the follow
$ lscpu -e
CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE MAXMHZ MINMHZ
0 0 0 0 0:0:0:0 yes 4200.0000 800.0000
1 0 0 1 1:1:1:0 yes 4200.0000 800.0000
2 0 0 2 2:2:2:0 yes 4200.0000 800.0000
3 0 0 3 3:3:3:0 yes 4200.0000 800.0000
4 0 0 0 0:0:0:0 yes 4200.0000 800.0000
5 0 0 1 1:1:1:0 yes 4200.0000 800.0000
6 0 0 2 2:2:2:0 yes 4200.0000 800.0000
7 0 0 3 3:3:3:0 yes 4200.0000 800.0000
Thanks for your help!!!
MacroX
August 13, 2020, 5:39pm
9
Hello,
I’m back with the 6VCPU I have this in game
And in my host I have this
I tried the same game in my windows partition and I have 20% of the CPU used by the same application…
Thank you
This seems wrong: Sockets: 2, Processors virtuels: 2? This can’t be what you want. This means your are using only 2 vcpus. This assumption also gets confirmed by the System Monitor application showing only 2 Cores in use.
Can you please again post the current complete XML for your virtual machine?
MacroX
August 15, 2020, 7:45pm
11
Hello, Thanks for your reply, I perform few modifications this is the file:
<domain type='kvm' id='2' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>Windows</name>
<uuid>MYUUID</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'>16777216</memory>
<currentMemory unit='KiB'>16777216</currentMemory>
<vcpu placement='static'>6</vcpu>
<iothreads>3</iothreads>
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='6'/>
<vcpupin vcpu='2' cpuset='3'/>
<vcpupin vcpu='3' cpuset='7'/>
<vcpupin vcpu='4' cpuset='1'/>
<vcpupin vcpu='5' cpuset='5'/>
<emulatorpin cpuset='0-1'/>
<iothreadpin iothread='1' cpuset='0-1'/>
<iothreadpin iothread='2' cpuset='2-3'/>
<iothreadpin iothread='3' cpuset='4-5'/>
</cputune>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-4.2'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/Windows_VARS.fd</nvram>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='10DE'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
<vmport state='off'/>
</features>
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' dies='1' cores='3' 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'/>
<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='raw' cache='writethrough' io='threads'/>
<source file='/run/media/bryan/C81AF9F81AF9E37C/windows.img' index='1'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</disk>
<controller type='usb' index='0' model='qemu-xhci' ports='15'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='sata' index='0'>
<alias name='sata0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<alias name='virtio-serial0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</controller>
<interface type='network'>
<mac address='52:54:00:27:10:13'/>
<source network='default' portid='f8662e8f-5547-4cdb-babd-a8e13595d8f2' bridge='virbr0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' 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='spicevmc'>
<target type='virtio' name='com.redhat.spice.0' state='disconnected'/>
<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>
<sound model='ich9'>
<alias name='sound0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</sound>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</source>
<alias name='hostdev0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' 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='0x00' slot='0x09' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x0c76'/>
<product id='0x161f'/>
<address bus='1' device='4'/>
</source>
<alias name='hostdev2'/>
<address type='usb' bus='0' port='1'/>
</hostdev>
<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='0x00' slot='0x0a' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='selinux' relabel='yes'>
<label>system_u:system_r:svirt_t:s0:c191,c578</label>
<imagelabel>system_u:object_r:svirt_image_t:s0:c191,c578</imagelabel>
</seclabel>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+1000:+36</label>
<imagelabel>+1000:+36</imagelabel>
</seclabel>
<qemu:commandline>
<qemu:arg value='-cpu'/>
<qemu:arg value='host,hv_time,kvm=off,hv_vendor_id=null'/>
<qemu:arg value='-object'/>
<qemu:arg value='input-linux,id=mouse1,evdev=/dev/input/by-id/usb-Mouse'/>
<qemu:arg value='-object'/>
<qemu:arg value='input-linux,id=kbd1,evdev=/dev/input/by-id/usb-KEYBOARD,grab_all=on,repeat=on'/>
</qemu:commandline>
</domain>
Interesting, to be honest I do not see what is wrong there. The cputune section looks correct to me. However the pictures you posted clearly show that your VM was only using 2 VCPUs not 6. Maybe someone else has and idea.
MacroX
August 16, 2020, 3:24pm
13
Hello,
thanks for your reply, So after your last message and before my precedent answer, I had modified the config.
Honestly, I put random value in “emulatorpin” and “iothreadpin” but it’s work…
1 Like
Can you please try to change your virtio disk mode to “native” instead of “threads” and use the following code and leave out “iothreads” section as well as any “iothreadpin” command entirely? From my experience in simple VM setups this should work totally fine and then you certainly don’t have any misconfigured I/O threads setup. I tell you this since when you put I/O threads on the wrong (highly utilized) cores performance will be worse than just letting the system handle everything.
<vcpu placement='static'>6</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='6'/>
<vcpupin vcpu='2' cpuset='3'/>
<vcpupin vcpu='3' cpuset='7'/>
<vcpupin vcpu='4' cpuset='1'/>
<vcpupin vcpu='5' cpuset='5'/>
<emulatorpin cpuset='0-1'/>
</cputune>
This would also simplify your setup and give less room for error.
MacroX
August 19, 2020, 1:48pm
15
This is the final XML what do you think?
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>Windows</name>
<uuid>a6b8963a-84b3-4970-80bc-521947abd193</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'>16777216</memory>
<currentMemory unit='KiB'>16777216</currentMemory>
<vcpu placement='static'>6</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='2'/>
<vcpupin vcpu='1' cpuset='6'/>
<vcpupin vcpu='2' cpuset='3'/>
<vcpupin vcpu='3' cpuset='7'/>
<vcpupin vcpu='4' cpuset='1'/>
<vcpupin vcpu='5' cpuset='5'/>
<emulatorpin cpuset='0-1'/>
</cputune>
<os>
<type arch='x86_64' machine='pc-i440fx-4.2'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/Windows_VARS.fd</nvram>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='10DE'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
<vmport state='off'/>
</features>
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' dies='1' cores='3' 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'/>
<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='raw' cache='none' io='native'/>
<source file='/run/media/bryan/C81AF9F81AF9E37C/windows.img'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/home/bryan/Downloads/virtio-win-0.1.185.iso'/>
<target dev='sda' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='qemu-xhci' ports='15'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</controller>
<interface type='network'>
<mac address='52:54:00:27:10:13'/>
<source network='default'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' 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='spicevmc'>
<target type='virtio' name='com.redhat.spice.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='mouse' bus='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0e' function='0x0'/>
</input>
<input type='keyboard' bus='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0f' function='0x0'/>
</input>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<sound model='ich9'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</sound>
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</source>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<source>
<address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/>
</source>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x0c76'/>
<product id='0x161f'/>
</source>
<address type='usb' bus='0' port='1'/>
</hostdev>
<redirdev bus='usb' type='spicevmc'>
<address type='usb' bus='0' port='2'/>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
<address type='usb' bus='0' port='3'/>
</redirdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
</memballoon>
</devices>
<qemu:commandline>
<qemu:arg value='-cpu'/>
<qemu:arg value='host,hv_time,kvm=off,hv_vendor_id=null'/>
<qemu:arg value='-object'/>
<qemu:arg value='input-linux,id=mouse1,evdev=/dev/input/by-id/usb-mouse'/>
<qemu:arg value='-object'/>
<qemu:arg value='input-linux,id=kbd1,evdev=/dev/input/by-id/usb-KEYBOARD,grab_all=on,repeat=on'/>
</qemu:commandline>
</domain>
When I played, my CPU is used up to 100%, and sometime I have my FPS that down to 4 fps… I don’t know why, more in dmesg message I have this :
[ 1931.800280] kvm_set_msr_common: 1754 callbacks suppressed
Thanks,
Can you please try to replace:
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' dies='1' cores='3' threads='2'/>
<cache mode='passthrough'/>
<feature policy='require' name='topoext'/>
</cpu>
with:
<cpu mode='host-model' check='none'>
<topology sockets='1' dies='1' cores='3' threads='2'/>
</cpu>
As far as I understand the Arch wiki entry about topoext you don’t need it on Intel and I would leave it out to reduce possible misconfigurations. Also try not to specify anything for the cache. I have a Ryzen CPU, don’t specify an entry for cache and have close to native gaming performance. Also which version of qemu are you running? I am asking since as far as I know you can’t use “host-passthrough” anymore in the most recent version!
Maybe passthrough your Mouse and Keyboard as USB Devices directly and try to run the VM without the evdev command “qemu:commandline” at the end and see if this improves anything.
But to be honest I am out of ideas here.
MacroX
August 23, 2020, 1:35am
17
Hello,
Thanks for your reply, so I here with a few news.
I test the game Modern Warfare on the same SSD and my CPU is in average at 70% (So In my opinion it is normal that with 3 cores the usage is higher)
I put my cpu in performance not in powersave model
With HugePage enabled my CPU is less loaded…KVM - Debian Wiki
For USB, I added this into my XML and I installed the driver and now I don’t have any bug, any problem, and the message has been disapear when I run a dmesg command
<input type='mouse' bus='virtio'>
<alias name='input0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0e' function='0x0'/>
</input>
<input type='keyboard' bus='virtio'>
<alias name='input1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x0f' function='0x0'/>
</input>
For the sound I have a headphone that I plug using the USB port.
Just before to close this thread, can you tell me if I can put all cores into my VM please?
And again, thank you for your help.
I am glad things are looking better on your end.
In theory you can pass through all of your cores, but this can lead to some problems. You see, Qemu needs some resources to manage the virtualization and if all your cores are busy running your game there might not be enough free resources to schedule all the virtualization. This again can lead to lags and stutters. It is normally recommended to leave the first core for the host OS and emulation. But as you might know the proof of the pudding is in the eating, so I say just try it.
MacroX
August 28, 2020, 9:04pm
19
Hello,
Thanks for your time, So could you tell me what I must modify if I want to test my vm on the 4 cores please?
When I Tried, I have an error the number of VCPU is not good…
Thank you.
You can try for example with:
<cputune>
<vcpupin vcpu='0' cpuset='0'/>
<vcpupin vcpu='1' cpuset='4'/>
<vcpupin vcpu='2' cpuset='1'/>
<vcpupin vcpu='3' cpuset='5'/>
<vcpupin vcpu='4' cpuset='2'/>
<vcpupin vcpu='5' cpuset='6'/>
<vcpupin vcpu='6' cpuset='3'/>
<vcpupin vcpu='7' cpuset='7'/>
<emulatorpin cpuset='0-7'/>
</cputune>
Edit: @MacroX by the way ping me like I just did you when you want to summon me. When you give an answer after 4 days and ask a question to me specifically, I would almost have missed it.
