[vfio-users] Poor Performance and freeze ingame with NVIDIA and 4570K

[Mario Goebbels]

It's an additional argument on the cpu option.

-cpu host,kvm=off,...,hv-vendor-id=foobar

Regards,
-mg

On Thu, Feb 11, 2016 at 9:19 PM, Bradley Davis <bradleydavisjr at gmail.com>
wrote:

> Can you please provide details on how to change "Hyper-V vendor ID" ? In
> the past i've changed the Device ID for the card, but had to compile QEMU
> with a custom patch provided a while back and then add the attributes to my
> XML with qemu:commandline
>
> On Mon, Feb 8, 2016 at 11:30 AM, Mario Goebbels <me at tomservo.cc> wrote:
>
>> I'm using command-line arguments, not libvirt. A quick Google suggests
>> that you need to define a number of iothreads in the XML and them assign
>> them to the drivers, like:
>>
>> <domain>
>> ...
>>     <iothreads>1</iothreads>
>> ...
>>     <disk type="block" device="disk">
>>       <driver name="qemu" type="raw" cache="none" io="native"
>> iothread="1"/>
>> ...
>>     </disk>
>> ...
>> </domain>
>>
>> It's pretty much the XML equivalent of what you'd write on the
>> command-line.
>>
>> Regards,
>> -mg
>>
>>
>> On Mon, Feb 8, 2016 at 2:31 PM, Mark Billington <
>> billington.mark at gmail.com> wrote:
>>
>>> Hi Mario,
>>> Would you be able to give some libvirt XML examples for the iothread
>>> implementation you've settled with?
>>> Ive played around with iothreads to increase disk performance in my VMs
>>> but it never made any difference. I think im missing a small piece of
>>> config so your implementation would definitely help me find where im
>>> tripping up!
>>>
>>>
>>
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>>
>>
>
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