[vfio-users] R9 290 to VEGA 64 => working!

[Quentin Deldycke]

Here are the upcoming results. I used only Superposition with different
modes.

720p 4x => 8x
16696 => 16498
(in this mode, GPU usage is ~65%... so not so relevant i would say)


1080p extreme 4x => 8x
4110 => 4255

4k optimized 4x => 8x => overclocked 2% gpu / 1025 ram
6070 => 6377 => 6791

If we compare with this page of results. Using a filter with vega64, the
top user with default clocks makes 6575 pts with a better cpu than mine
https://benchmark.unigine.com/results/rid_0fe88b22f59a457797ecbe66d7efccb0



--
Deldycke Quentin


On 31 October 2017 at 15:08, Quentin Deldycke <quentindeldycke at gmail.com>
wrote:

> Hello,
>
> Some news for people who could be interested.
>
> Vega 64 works (nearly) perfectly on vfio!
>
> 1 thing to keep in mind, the vega have a 'funny' pcie system which look
> like this:
>
> - bridge
>  \- bridge
>    |- GPU
>    |- Sound card
>
> Using acs patch, forwarding only GPU on kernel 4.13, it works.
>
> I did not test sound card as i have a separate pcie one for the VM
> I did not test on native linux to switch between host and vm, but i have
> few hopes
> I did tested suspend mode of the vm (then i suspend the host). Both works
> perfectly at out of sleep. (with a little virsh domtime --sync so windows
> is not lost)
>
> 1 bug:
>  - RESET!
>  - But if you put the host to sleep, the card come back to life...
>
> Note something because of the tricksy pcie bridges:
>
> 02:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1470 (rev
> c0) (prog-if 00 [Normal decode])
>                LnkSta:    Speed 8GT/s, Width x4
> 03:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 1471
> (prog-if 00 [Normal decode])
>                LnkSta:    Speed 8GT/s, Width x16
> 04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
> Vega 10 XT [Radeon RX Vega 64] (rev c0) (prog-if 00 [VGA controller])
>                LnkSta:    Speed 8GT/s, Width x16
> 04:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device aaf8
>                LnkSta:    Speed 8GT/s, Width x16
>
> The card is in an x4 port. But it sees iself connected to a x16 one
> (windows thinks it is x16, gpu-z benchmark find it as x16).
>
> I will try to make a benchmark later between both slots of my motherboard.
> x8 vs x4 ( no x16, sorry, my nvme drive limits my available lanes to x8).
> --
> Deldycke Quentin
>
>
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