[vfio-users] Stuttering in guest

[Bradley Davis]

Pin your CPUs

On Fri, Aug 28, 2015 at 9:26 PM, Garrett Powell <
garretttracypowell at gmail.com> wrote:

> MSI X79-GD45 Plus
> Intel i7-4820k
> Nvidia GTX 720 (Host)
> Nvidia GTX 970 (Guest)
>
> I've been having some problems with stuttering in my Windows 10 guest.
> Every 10-20 seconds the whole system will freeze up (even during the boot
> animation) for a second or two. This has only started happening recently,
> but I'm not sure what the cause could be. The last thing I did was
> configure Pulseaudio to connect to localhost over TCP (audio wasn't working
> before then).
>
> The following line in my launch script is also now causing the VM to
> crash/not boot, and instead just show a black screen.
> . . . -smp sockets=1,cores=4,threads=2 . . .
>
> Changing it to allocate only two cores fixes the crashing problem, but the
> stuttering problem remains.
> . . . -smp sockets=1,cores=2,threads=2 . . .
>
> Here's the rest of my launch script:
> #!/bin/bash
>
> synergys --daemon --config /etc/synergy.conf
>
> export QEMU_AUDIO_DRV=pa
> export QEMU_PA_SERVER=localhost
> export PULSE_SERVER=localhost
>
> qemu-system-x86_64 \
> -enable-kvm \
> -m 10240 \
> -cpu host,kvm=off \
> -smp sockets=1,cores=2,threads=2 \
> -vga none \
> -nographic \
> -soundhw hda \
> -name Windows10-VM \
> -drive
> if=pflash,format=raw,readonly,file=/usr/share/edk2.git/ovmf-x64/OVMF_CODE-pure-efi.fd
> \
> -drive
> if=pflash,format=raw,file=/usr/share/edk2.git/ovmf-x64/OVMF_VARS-pure-efi.fd
> \
> -device vfio-pci,host=03:00.0 \
> -device vfio-pci,host=03:00.1 \
> -device virtio-scsi-pci,id=scsi \
> -drive
> file=/home/garrett/VMs/Windows10/windows.img,id=disk,format=raw,if=none
> -device scsi-hd,drive=disk \
> -drive file=/home/garrett/VMs/Windows10/windows.iso,id=isocd,if=none
> -device scsi-cd,drive=isocd \
> -drive file=/home/garrett/VMs/Windows10/virtio-win.iso,id=virtiocd,if=none
> -device ide-cd,bus=ide.1,drive=virtiocd \
> -drive file=/mnt/storage/win-storage.img,id=storage,format=raw,if=none
> -device scsi-hd,drive=storage
>
> pkill synergys
>
>
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>
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