[vfio-users] Audio sync issues Windows 10
Brandon Ganem
brandonganem at gmail.com
Tue Dec 20 05:06:11 UTC 2016
I'm not entirely sure what this tells me, but IRQ usage drops significantly
(particularly on "LOC") when not playing back a video. Maybe somebody
smarter than I am has a though.
The poorly drawn yellow line is roughly when i stopped any video play back
in this graph. Time scale is a 15 minute window from collectd's irq monitor.
[image: Inline image 1]
On Sun, Dec 18, 2016 at 10:33 PM, Brandon Ganem <brandonganem at gmail.com>
wrote:
> I'm passing through USB, but only a mic is on that for audio. 00:1b.0
> (intel built in audio) and nvidia HDMI audio both have the issue.
>
> On Sat, Dec 17, 2016 at 3:58 PM, Zachary Boley <zboley00 at gmail.com> wrote:
>
>> Doesn't look like it but are you passing a USB controller in for it?
>> Can't really see how you're using audio
>>
>> On Dec 16, 2016 2:39 PM, "Brandon Ganem" <brandonganem at gmail.com> wrote:
>>
>>> Hi all,
>>> I've got a Windows 10 VM on top of arch linux. It appears that after
>>> some period of time my audio / video loses sync for long running videos
>>> (youtube for example). Switching audio devices in "sound options" in
>>> windows causes the video to sync back up to the audio.
>>>
>>> The audio does not appear to be distorted, it's almost as if the video
>>> slows down by a frame or two and over time that's enough to drop the sync.
>>>
>>>
>>>
>>> Here's my XML:
>>> <domain type='kvm' xmlns:qemu='http://libvirt.org
>>> /schemas/domain/qemu/1.0'>
>>> <name>win10_gaming_1</name>
>>> <uuid>01bd2ed1-b465-4eba-b6e4-47c6ac8171c6</uuid>
>>> <memory unit='KiB'>16777216</memory>
>>> <currentMemory unit='KiB'>16777216</currentMemory>
>>> <vcpu placement='static'>12</vcpu>
>>> <iothreads>2</iothreads>
>>> <iothreadids>
>>> <iothread id='1'/>
>>> <iothread id='2'/>
>>> </iothreadids>
>>> <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='12'/>
>>> <vcpupin vcpu='9' cpuset='13'/>
>>> <vcpupin vcpu='10' cpuset='14'/>
>>> <vcpupin vcpu='11' cpuset='15'/>
>>> <emulatorpin cpuset='0-1'/>
>>> <iothreadpin iothread='1' cpuset='0'/>
>>> <iothreadpin iothread='2' cpuset='1'/>
>>> <iothreadsched iothreads='2' scheduler='batch'/>
>>> </cputune>
>>> <os>
>>> <type arch='x86_64' machine='pc-i440fx-2.5'>hvm</type>
>>> <loader readonly='yes' type='pflash'>/usr/share/edk2.
>>> git/ovmf-x64/OVMF_CODE-pure-efi.fd</loader>
>>> <nvram template='/usr/share/edk2.git/ovmf-x64/OVMF_VARS-pure-efi.fd
>>> '>/var/lib/libvirt/qemu/nvram/win10_gaming_1_VARS.fd</nvram>
>>> <boot dev='hd'/>
>>> </os>
>>> <features>
>>> <acpi/>
>>> <hyperv>
>>> <relaxed state='off'/>
>>> <vapic state='off'/>
>>> <spinlocks state='off'/>
>>> </hyperv>
>>> <kvm>
>>> <hidden state='on'/>
>>> </kvm>
>>> </features>
>>> <cpu mode='host-passthrough'>
>>> <topology sockets='1' cores='6' threads='2'/>
>>> </cpu>
>>> <clock offset='localtime'>
>>> <timer name='hypervclock' present='no'/>
>>> </clock>
>>> <on_poweroff>destroy</on_poweroff>
>>> <on_reboot>restart</on_reboot>
>>> <on_crash>destroy</on_crash>
>>> <devices>
>>> <emulator>/usr/sbin/qemu-system-x86_64</emulator>
>>> <disk type='file' device='disk'>
>>> <driver name='qemu' type='raw' cache='writethrough'/>
>>> <source file='/flash/win_gaming_1.img'/>
>>> <target dev='vda' bus='virtio'/>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x09'
>>> function='0x0'/>
>>> </disk>
>>> <disk type='file' device='disk'>
>>> <driver name='qemu' type='raw' cache='writethrough'/>
>>> <source file='/vmstore/steam/gaming_1/steam_library.img'/>
>>> <target dev='vdb' bus='virtio'/>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a'
>>> function='0x0'/>
>>> </disk>
>>> <controller type='pci' index='0' model='pci-root'/>
>>> <controller type='virtio-serial' index='0'>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
>>> function='0x0'/>
>>> </controller>
>>> <controller type='usb' index='0' model='piix3-uhci'>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
>>> function='0x2'/>
>>> </controller>
>>> <interface type='bridge'>
>>> <mac address='52:54:00:a0:41:92'/>
>>> <source bridge='br0'/>
>>> <model type='virtio'/>
>>> <rom bar='off'/>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
>>> function='0x0'/>
>>> </interface>
>>> <input type='mouse' bus='ps2'/>
>>> <input type='keyboard' bus='ps2'/>
>>> <memballoon model='virtio'>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
>>> function='0x0'/>
>>> </memballoon>
>>> </devices>
>>> <qemu:commandline>
>>> <qemu:arg value='-device'/>
>>> <qemu:arg value='ioh3420,bus=pci.0,addr=
>>> 1c.0,multifunction=on,port=1,chassis=1,id=root.1'/>
>>> <qemu:arg value='-device'/>
>>> <qemu:arg value='vfio-pci,host=02:00.0,b
>>> us=root.1,addr=00.0,multifunction=on,x-vga=on'/>
>>> <qemu:arg value='-device'/>
>>> <qemu:arg value='vfio-pci,host=02:00.1,b
>>> us=root.1,addr=00.1,multifunction=on'/>
>>> <qemu:arg value='-device'/>
>>> <qemu:arg value='vfio-pci,host=00:14.0,b
>>> us=root.1,addr=00.2,multifunction=on'/>
>>> <qemu:arg value='-device'/>
>>> <qemu:arg value='vfio-pci,host=00:1a.0,b
>>> us=root.1,addr=00.3,multifunction=on'/>
>>> <qemu:arg value='-device'/>
>>> <qemu:arg value='vfio-pci,host=00:1b.0,b
>>> us=root.1,addr=00.4,multifunction=on'/>
>>> </qemu:commandline>
>>> </domain>
>>>
>>>
>>> LSPCI:
>>> 02:00.0 VGA compatible controller: NVIDIA Corporation GM206 [GeForce GTX
>>> 960] (rev a1) (prog-if 00 [VGA controller])
>>> Subsystem: Micro-Star International Co., Ltd. [MSI] Device 3202
>>> Physical Slot: 4
>>> Flags: bus master, fast devsel, latency 0, IRQ 26, NUMA node 0
>>> Memory at fa000000 (32-bit, non-prefetchable) [size=16M]
>>> Memory at c0000000 (64-bit, prefetchable) [size=256M]
>>> Memory at d0000000 (64-bit, prefetchable) [size=32M]
>>> I/O ports at e000 [size=128]
>>> Expansion ROM at fb000000 [disabled] [size=512K]
>>> Capabilities: [60] Power Management version 3
>>> Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>> Capabilities: [78] Express Legacy Endpoint, MSI 00
>>> Capabilities: [100] Virtual Channel
>>> Capabilities: [258] L1 PM Substates
>>> Capabilities: [128] Power Budgeting <?>
>>> Capabilities: [420] Advanced Error Reporting
>>> Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1
>>> Len=024 <?>
>>> Capabilities: [900] #19
>>> Kernel driver in use: vfio-pci
>>> Kernel modules: nouveau
>>>
>>> 02:00.1 Audio device: NVIDIA Corporation Device 0fba (rev a1)
>>> Subsystem: Micro-Star International Co., Ltd. [MSI] Device 3202
>>> Physical Slot: 4
>>> Flags: bus master, fast devsel, latency 0, IRQ 51, NUMA node 0
>>> Memory at fb080000 (32-bit, non-prefetchable) [size=16K]
>>> Capabilities: [60] Power Management version 3
>>> Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>> Capabilities: [78] Express Endpoint, MSI 00
>>> Kernel driver in use: vfio-pci
>>> Kernel modules: snd_hda_intel
>>>
>>> 00:1b.0 Audio device: Intel Corporation C610/X99 series chipset HD Audio
>>> Controller (rev 05)
>>> Subsystem: ASRock Incorporation Device 1151
>>> Flags: bus master, fast devsel, latency 0, IRQ 22, NUMA node 0
>>> Memory at fb330000 (64-bit, non-prefetchable) [size=16K]
>>> Capabilities: [50] Power Management version 2
>>> Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
>>> Capabilities: [70] Express Root Complex Integrated Endpoint, MSI
>>> 00
>>> Capabilities: [100] Virtual Channel
>>> Kernel driver in use: vfio-pci
>>> Kernel modules: snd_hda_intel
>>>
>>> 00:1d.0 USB controller: Intel Corporation C610/X99 series chipset USB
>>> Enhanced Host Controller #1 (rev 05) (prog-if 20 [EHCI])
>>> Subsystem: ASRock Incorporation Device 8d26
>>> Flags: medium devsel, IRQ 18, NUMA node 0
>>> Memory at fb337000 (32-bit, non-prefetchable) [size=1K]
>>> Capabilities: [50] Power Management version 2
>>> Capabilities: [58] Debug port: BAR=1 offset=00a0
>>> Capabilities: [98] PCI Advanced Features
>>> Kernel driver in use: vfio-pci
>>> Kernel modules: ehci_pci
>>>
>>> 00:1a.0 USB controller: Intel Corporation C610/X99 series chipset USB
>>> Enhanced Host Controller #2 (rev 05) (prog-if 20 [EHCI])
>>> Subsystem: ASRock Incorporation Device 8d2d
>>> Flags: bus master, medium devsel, latency 0, IRQ 18, NUMA node 0
>>> Memory at fb338000 (32-bit, non-prefetchable) [size=1K]
>>> Capabilities: [50] Power Management version 2
>>> Capabilities: [58] Debug port: BAR=1 offset=00a0
>>> Capabilities: [98] PCI Advanced Features
>>> Kernel driver in use: vfio-pci
>>> Kernel modules: ehci_pci
>>>
>>> _______________________________________________
>>> vfio-users mailing list
>>> vfio-users at redhat.com
>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>
>>>
>
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