[vfio-users] Brutal DPC Latency - how is yours? check it please and report back

[Eddie Yen]

Thanks for information! And sorry I don'r read carefully at beginning
message.

For my result, I got about 1000μs below and only few times got 1000μs above
when idling.

I'm using 4820K and used 4 threads to VM, also  I set these 4 threads as 4
cores in VM settings.
The OS is Windows 10.

2015-10-29 13:21 GMT+08:00 Blank Field <ihatethisfield at gmail.com>:

> I think they're using this:
> www.thesycon.de/deu/latency_check.shtml
> On Oct 29, 2015 6:11 AM, "Eddie Yen" <missile0407 at gmail.com> wrote:
>
>> Sorry, but how to check DPC Latency?
>>
>> 2015-10-29 10:08 GMT+08:00 Nick Sukharev <nicksukharev at gmail.com>:
>>
>>> I just checked on W7 and I get 3000μs-4000μs one one of the guests when
>>> 3 guests are running.
>>>
>>> On Wed, Oct 28, 2015 at 4:52 AM, Sergey Vlasov <sergey at vlasov.me> wrote:
>>>
>>>> On 27 October 2015 at 18:38, LordZiru <lordziru at gmail.com> wrote:
>>>>
>>>>> I have brutal DPC Latency on qemu, no matter if using pci-assign or
>>>>> vfio-pci or without any passthrought,
>>>>>
>>>>> my DPC Latency is like:
>>>>> 10000,500,8000,6000,800,300,12000,9000,700,2000,9000
>>>>> and on native windows 7 is like:
>>>>> 20,30,20,50,20,30,20,20,30
>>>>>
>>>>
>>>> In Windows 10 guest I constantly have red bars around 3000μs
>>>> (microseconds), spiking sometimes up to 10000μs.
>>>>
>>>>
>>>>> I don't know how to fix it.
>>>>> this matter for me because i are using USB Sound Card for my VMs,
>>>>> and i get sound drop-outs every 0-4 secounds
>>>>>
>>>>>
>>>> That bugs me a lot too. I also use an external USB card and my DAW
>>>> periodically drops out :(
>>>>
>>>> I haven't tried CPU pinning yet though. And perhaps I should try
>>>> Windows 7.
>>>>
>>>>
>>>> _______________________________________________
>>>> vfio-users mailing list
>>>> vfio-users at redhat.com
>>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>>
>>>>
>>>
>>> _______________________________________________
>>> vfio-users mailing list
>>> vfio-users at redhat.com
>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>
>>>
>>
>> _______________________________________________
>> vfio-users mailing list
>> vfio-users at redhat.com
>> https://www.redhat.com/mailman/listinfo/vfio-users
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20151029/9e4f890f/attachment.htm>