Expected Gaming Performance

[lukeoslavia]

Hi all,

I have a new threadripper 1950x build here and the plan was to run unraid dockers for security cams, plex media, and nextcloud/owncloud with a few vms including one for gaming (windows 10). I ran LSTOPO and made sure I had my cpu's set correctly to be on the same node with my gpu (gtx 1080) but my performance is about 50% and sometimes less than that of bare metal windows. I used 2 ssd cache drives in raid 0 and was gaming off of those and had my os on them. 

 

So my question is, should I expect more than 50% of bare metal performance for gaming and if so how much of a performance hit should I be expecting?

[david279]

Lets see your xml for the VM and see if it can be tweaked a bit.

[Jerky_san]

32 minutes ago, lukeoslavia said:

Hi all,

I have a new threadripper 1950x build here and the plan was to run unraid dockers for security cams, plex media, and nextcloud/owncloud with a few vms including one for gaming (windows 10). I ran LSTOPO and made sure I had my cpu's set correctly to be on the same node with my gpu (gtx 1080) but my performance is about 50% and sometimes less than that of bare metal windows. I used 2 ssd cache drives in raid 0 and was gaming off of those and had my os on them. 

 

So my question is, should I expect more than 50% of bare metal performance for gaming and if so how much of a performance hit should I be expecting?

There are tweaks that are still happening to qemu which is the hypervisor unraid uses. Ram read and write I can get the same as bare metal. L1-L3 cache is within 97% ish. As far as fps in game it varies.. you with a 1950x don't have to worry as much as both of your dies have memory controllers. There is a thread about threadripper you should read. Once I get to my machine I'll post it but it discusses emulating an epyc processor instead of pass through to make the cache right. Qemu4.0(we are seeing if limetech will give us just the patch we need) will bring 16x pci-e patch that fixes a bug where the gpu card gets certain registers set when the vm is booting and cause a few issues like higher latency than expected.

 

Are you running channel mode for ram?

Also I agree with the other guy. Post your xml make sure to code it with xml so we can read it easier.

 

Also saw your playing off the cache drive instead of dedicated pass through drive. That will cause performance problems

Edited January 30, 2019 by Jerky_san

[Symon]

Here is the post that you should read through :

 

An here is my XML with my setup which is very simmilar to compare with:

<?xml version='1.0' encoding='UTF-8'?>
<domain type='kvm' id='38'>
  <name>Monster</name>
  <uuid>18da3180-7fb3-6e5c-7013-963dfa89ec0a</uuid>
  <metadata>
    <vmtemplate xmlns="unraid" name="Windows 10" icon="freebsd.png" os="windows10"/>
  </metadata>
  <memory unit='KiB'>12582912</memory>
  <currentMemory unit='KiB'>12582912</currentMemory>
  <memoryBacking>
    <nosharepages/>
  </memoryBacking>
  <vcpu placement='static'>12</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='2'/>
    <vcpupin vcpu='1' cpuset='18'/>
    <vcpupin vcpu='2' cpuset='3'/>
    <vcpupin vcpu='3' cpuset='19'/>
    <vcpupin vcpu='4' cpuset='4'/>
    <vcpupin vcpu='5' cpuset='20'/>
    <vcpupin vcpu='6' cpuset='5'/>
    <vcpupin vcpu='7' cpuset='21'/>
    <vcpupin vcpu='8' cpuset='6'/>
    <vcpupin vcpu='9' cpuset='22'/>
    <vcpupin vcpu='10' cpuset='7'/>
    <vcpupin vcpu='11' cpuset='23'/>
    <emulatorpin cpuset='1,17'/>
  </cputune>
  <numatune>
    <memory mode='strict' nodeset='0'/>
  </numatune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-i440fx-3.0'>hvm</type>
    <loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi.fd</loader>
    <nvram>/etc/libvirt/qemu/nvram/18da3180-7fb3-6e5c-7013-963dfa89ec0a_VARS-pure-efi.fd</nvram>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state='on'/>
      <vapic state='on'/>
      <spinlocks state='on' retries='8191'/>
      <vendor_id state='on' value='none'/>
    </hyperv>
  </features>
  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>EPYC-IBPB</model>
    <topology sockets='1' cores='6' threads='2'/>
    <feature policy='require' name='topoext'/>
    <feature policy='disable' name='monitor'/>
    <feature policy='require' name='x2apic'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='disable' name='svm'/>
  </cpu>
  <clock offset='localtime'>
    <timer name='hypervclock' present='yes'/>
    <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/user/domains/Monster/vdisk1.img'/>
      <backingStore/>
      <target dev='hdc' bus='virtio'/>
      <boot order='1'/>
      <alias name='virtio-disk2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </disk>
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw' cache='writeback'/>
      <source dev='/dev/disk/by-id/ata-Samsung_SSD_850_PRO_512GB_S39FNX0JB11716E'/>
      <backingStore/>
      <target dev='hdd' bus='sata'/>
      <alias name='sata0-0-3'/>
      <address type='drive' controller='0' bus='0' target='0' unit='3'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/mnt/user/isos/virtio-win-0.1.141-1.iso'/>
      <backingStore/>
      <target dev='hdb' bus='ide'/>
      <readonly/>
      <alias name='ide0-0-1'/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <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'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x2'/>
    </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='0x03' function='0x0'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:d6:6e:98'/>
      <source bridge='br0'/>
      <target dev='vnet0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' 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='/var/lib/libvirt/qemu/channel/target/domain-38-Monster/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>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x0a' slot='0x00' function='0x0'/>
      </source>
      <alias name='hostdev0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </hostdev>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x0a' slot='0x00' function='0x1'/>
      </source>
      <alias name='hostdev1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='no'>
      <source>
        <vendor id='0x046d'/>
        <product id='0xc22a'/>
        <address bus='7' device='6'/>
      </source>
      <alias name='hostdev2'/>
      <address type='usb' bus='0' port='1'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='no'>
      <source>
        <vendor id='0x046d'/>
        <product id='0xc22b'/>
        <address bus='7' device='5'/>
      </source>
      <alias name='hostdev3'/>
      <address type='usb' bus='0' port='2'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='no'>
      <source>
        <vendor id='0x0951'/>
        <product id='0x16a4'/>
        <address bus='7' device='4'/>
      </source>
      <alias name='hostdev4'/>
      <address type='usb' bus='0' port='3'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='no'>
      <source>
        <vendor id='0x1532'/>
        <product id='0x0043'/>
        <address bus='7' device='2'/>
      </source>
      <alias name='hostdev5'/>
      <address type='usb' bus='0' port='4'/>
    </hostdev>
    <hostdev mode='subsystem' type='usb' managed='no'>
      <source>
        <vendor id='0x1e71'/>
        <product id='0x170e'/>
        <address bus='1' device='3'/>
      </source>
      <alias name='hostdev6'/>
      <address type='usb' bus='0' port='5'/>
    </hostdev>
    <memballoon model='none'/>
  </devices>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+0:+100</label>
    <imagelabel>+0:+100</imagelabel>
  </seclabel>
</domain>

@david279  Do you see any other points that can be optimized besides changing passthrough disk to VirtIO?

 

Edited January 30, 2019 by Symon

[david279]

Change all your disk to at least virtio. Having them as SATA can leads to bad performance.

Sent from my SM-N960U using Tapatalk

[lukeoslavia]

Thanks for all the tips and sorry for the late reply. I did manage to get my system running much better with your suggestions and the PSA thread was also very helpful!