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Hy. For the last few days i have been trying to set up a KVM system for my gaming, and i have been succesfull, but the ingame performance is nowhere near the "near native" perfomance that i have been reading around the internet.
I have been testing mostly with Rise of The Tomb Raider benchmark and i'm seeing 20-30FPS drops. (High settings, 80FPS native, 50 FPS virtualized).
I noticed that according to GPU-Z, in the virtualized envirovment my GPU is only utilized around 80-90 percent.
The interesting is that if i switch everything to Very High settings i'm still getting 45-50FPS in the game with the same GPU usage.
I tried CPU pinning (no improvment), static huge pages (maybe 5-10 fps improvment)
My config is:
AMD FX-8350
Gigabyte 990XA-UD3
16GB DDR3 RAM
Asus Strix GTX 970 (passed through)
an old ATI HD 6850 for the host
Host:
Linux arch-test 4.12.6-1-ARCH #1 SMP PREEMPT Sat Aug 12 09:16:22 CEST 2017 x86_64 GNU/Linux
IOMMU Groups passing through group 15
IOMMU Group 0 00:00.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD/ATI] RD9x0/RX980 Host Bridge [1002:5a14] (rev 02)
IOMMU Group 1 00:02.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GFX port 0) [1002:5a16]
IOMMU Group 10 00:14.2 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) [1002:4383] (rev 40)
IOMMU Group 11 00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller [1002:439d] (rev 40)
IOMMU Group 12 00:14.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge [1002:4384] (rev 40)
IOMMU Group 13 00:14.5 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller [1002:4399]
IOMMU Group 14 00:16.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
IOMMU Group 14 00:16.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
IOMMU Group 15 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM204 [GeForce GTX 970] [10de:13c2] (rev a1)
IOMMU Group 15 01:00.1 Audio device [0403]: NVIDIA Corporation GM204 High Definition Audio Controller [10de:0fbb] (rev a1)
IOMMU Group 16 02:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Barts PRO [Radeon HD 6850] [1002:6739]
IOMMU Group 16 02:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Barts HDMI Audio [Radeon HD 6790/6850/6870 / 7720 OEM] [1002:aa88]
IOMMU Group 17 03:00.0 USB controller [0c03]: Etron Technology, Inc. EJ168 USB 3.0 Host Controller [1b6f:7023] (rev 01)
IOMMU Group 18 04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
IOMMU Group 19 05:00.0 USB controller [0c03]: Etron Technology, Inc. EJ168 USB 3.0 Host Controller [1b6f:7023] (rev 01)
IOMMU Group 2 00:03.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0 PCI to PCI bridge (PCI Express GFX port 1) [1002:5a17]
IOMMU Group 3 00:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 0) [1002:5a18]
IOMMU Group 4 00:09.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 4) [1002:5a1c]
IOMMU Group 5 00:0a.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 5) [1002:5a1d]
IOMMU Group 6 00:11.0 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] [1002:4391] (rev 40)
IOMMU Group 7 00:12.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
IOMMU Group 7 00:12.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
IOMMU Group 8 00:13.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
IOMMU Group 8 00:13.2 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
IOMMU Group 9 00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller [1002:4385] (rev 42)
lspci -k
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD9x0/RX980 Host Bridge (rev 02)
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] RD9x0/RX980 Host Bridge
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD/ATI] RD890S/RD990 I/O Memory Management Unit (IOMMU)
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] RD890S/RD990 I/O Memory Management Unit (IOMMU)
00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GFX port 0)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:03.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0 PCI to PCI bridge (PCI Express GFX port 1)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 0)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:09.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 4)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:0a.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RD890/RD9x0/RX980 PCI to PCI bridge (PCI Express GPP Port 5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] (rev 40)
Subsystem: Gigabyte Technology Co., Ltd Device b002
Kernel driver in use: ahci
Kernel modules: ahci
00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ohci-pci
Kernel modules: ohci_pci
00:12.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ehci-pci
Kernel modules: ehci_pci
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ohci-pci
Kernel modules: ohci_pci
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ehci-pci
Kernel modules: ehci_pci
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 42)
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller
Kernel driver in use: piix4_smbus
Kernel modules: i2c_piix4, sp5100_tco
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA) (rev 40)
Subsystem: Gigabyte Technology Co., Ltd Device a132
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 LPC host controller
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ohci-pci
Kernel modules: ohci_pci
00:16.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ohci-pci
Kernel modules: ohci_pci
00:16.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI Controller
Subsystem: Gigabyte Technology Co., Ltd Device 5004
Kernel driver in use: ehci-pci
Kernel modules: ehci_pci
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 3
Kernel driver in use: k10temp
Kernel modules: k10temp
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 4
Kernel driver in use: fam15h_power
Kernel modules: fam15h_power
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 15h Processor Function 5
01:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 8508
Kernel driver in use: vfio-pci
Kernel modules: nouveau
01:00.1 Audio device: NVIDIA Corporation GM204 High Definition Audio Controller (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 8508
Kernel driver in use: vfio-pci
Kernel modules: snd_hda_intel
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Barts PRO [Radeon HD 6850]
Subsystem: Gigabyte Technology Co., Ltd Device 21f9
Kernel driver in use: radeon
Kernel modules: radeon
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Barts HDMI Audio [Radeon HD 6790/6850/6870 / 7720 OEM]
Subsystem: Gigabyte Technology Co., Ltd Device aa88
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
03:00.0 USB controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
Subsystem: Gigabyte Technology Co., Ltd Device 5007
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
Subsystem: Gigabyte Technology Co., Ltd Onboard Ethernet
Kernel driver in use: r8169
Kernel modules: r8169
05:00.0 USB controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
Subsystem: Gigabyte Technology Co., Ltd Device 5007
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
My lastest libvirt config:
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<name>win10</name>
<uuid>f103bd55-9684-46be-9703-7242d74a7abc</uuid>
<memory unit='KiB'>12582912</memory>
<currentMemory unit='KiB'>12582912</currentMemory>
<memoryBacking>
<hugepages/>
</memoryBacking>
<vcpu placement='static'>8</vcpu>
<cputune>
<vcpupin vcpu='0' cpuset='0'/>
<vcpupin vcpu='1' cpuset='1'/>
<vcpupin vcpu='2' cpuset='2'/>
<vcpupin vcpu='3' cpuset='3'/>
<vcpupin vcpu='4' cpuset='4'/>
<vcpupin vcpu='5' cpuset='5'/>
<vcpupin vcpu='6' cpuset='6'/>
<vcpupin vcpu='7' cpuset='7'/>
</cputune>
<os>
<type arch='x86_64' machine='pc-q35-2.9'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/ovmf/ovmf_code_x64.bin</loader>
<nvram>/var/lib/libvirt/qemu/nvram/win10_VARS.fd</nvram>
<bootmenu enable='no'/>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='whatever'/>
</hyperv>
<kvm>
<hidden state='on'/>
</kvm>
<vmport state='off'/>
</features>
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' cores='8' threads='1'/>
</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/sbin/qemu-system-x86_64</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw' cache='none' io='native'/>
<source dev='/dev/sdb'/>
<target dev='vda' bus='virtio'/>
<boot order='1'/>
<address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/root/Downloads/Win10_1703_Hungarian_x64.iso'/>
<target dev='sda' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/root/Downloads/virtio-win-0.1.141.iso'/>
<target dev='sdb' bus='sata'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<controller type='usb' index='0' model='nec-xhci'>
<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
</controller>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
</controller>
<controller type='sata' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
</controller>
<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='0x10'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
</controller>
<controller type='pci' index='2' model='dmi-to-pci-bridge'>
<model name='i82801b11-bridge'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1e' function='0x0'/>
</controller>
<controller type='pci' index='3' model='pci-bridge'>
<model name='pci-bridge'/>
<target chassisNr='3'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
</controller>
<controller type='pci' index='4' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='4' port='0x11'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
</controller>
<controller type='pci' index='5' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='5' port='0x12'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
</controller>
<controller type='pci' index='6' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='6' port='0x13'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
</controller>
<controller type='pci' index='7' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='7' port='0x14'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
</controller>
<controller type='pci' index='8' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='8' port='0x15'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
</controller>
<controller type='pci' index='9' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='9' port='0x16'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
</controller>
<controller type='pci' index='10' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='10' port='0x17'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x7'/>
</controller>
<interface type='direct'>
<mac address='52:54:00:e1:a3:c5'/>
<source dev='enp4s0' mode='vepa'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
</interface>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x03' slot='0x01' 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='0x09' slot='0x00' 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='0x0a' slot='0x00' function='0x0'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x04d9'/>
<product id='0xa01c'/>
</source>
<address type='usb' bus='0' port='1'/>
</hostdev>
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x040b'/>
<product id='0x2014'/>
</source>
<address type='usb' bus='0' port='2'/>
</hostdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/>
</memballoon>
</devices>
<qemu:commandline>
<qemu:arg value='-set'/>
<qemu:arg value='device.hostdev0.x-vga=on'/>
</qemu:commandline>
</domain>
I would kindly accept any suggestions because i would love to migrate my OS to linux but i dont want to loose 1/3 of my GPU performance.
P.S.: Sorry for my bad english
Last edited by hpeter94 (2017-08-13 17:47:13)
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<cpu mode='host-passthrough' check='none'>
<topology sockets='1' cores='8' threads='1'/>
You may try using threads
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' cores='4' threads='4'/>
Also check out http://vfio.blogspot.com/ for more info
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