[vfio-users] z370 iommu groupings

[Jan Wiele]

Last month I have written down my "4Gamers1PC"-setup [1][2]. Perhaps this is useful to 
you.

Regards, Jan

[1] https://github.com/J4nsen/4gamers1pc
[2] https://imgur.com/a/Husi2


Am Montag, 18. Dezember 2017, 07:50:11 CET schrieb Nick S:
> My goal is running multiple Windows OS with 3d support on those virtual
> machines. I in fact already have one such server with 4 watercooled cards
> on x99 chipset. The only thing I don't like with my existing Haswell-E
> solution is the USB graphics I use, but there I have an option of using a
> 1x PCIE GPU for host because all but one GPU I use were converted to single
> slot and the motherboard has 5 slots total.
> For this new server I want RX 580 cards that don't have a single slot
> conversion available. This means 4 cards on the board + Intel Graphics
> would be an ideal combination for me. I only need 1 USB connection for that
> server, so no need for more PCIE cards. Another option would be finding
> some server board with graphics chip and use xeon, linus tech style. I
> would prefer a single modern CPU to two old Xeons though and PCIe expansion
> box likely costs thousands just by itself. I can budget what I want in
> around 3 grand otherwise.
> 
> Also, Intel Graphics has its own GPU virtualization project going and while
> last time I check serious 3d load was crashing my kernel, I would really
> like to have an option to use it when it becomes stable.
> 
> 2017-12-17 20:00 GMT-08:00 Taiidan at gmx.com <Taiidan at gmx.com>:
> > No matter what you get I would advise against getting a non-server board
> > where you won't be getting support for what they consider to be a server
> > feature, someone with a "gamer" board who says IOMMU works may have a
> > different revision than what is currently being sold - getting it working
> > is always a fluke at best,
> > 
> > What are your goals for this build? What programs will you be running?
> > 
> > 
> > Honestly 4 dual slot cards on the same board is a really tall order and
> > wouldn't leave you with space for peripheral cards if you want real USB
> > controllers instead of emulated controllers.
> > You might consider buying a GPU type PCI-e expansion system such as the
> > ones from cyclone microsystems which are dual slot spaced and would leave
> > you with enough room for other cards.
> > http://www.cyclone.com/products/expansion_systems/600-2711.php
> > 
> > If you don't need x86-64 and if you really need to max out the bus on your
> > video cards I would consider a POWER9 machine such as the TALOS 2, the
> > company who makes it has released firmware for other boards that has
> > excellent IOMMU groups and they actually reply to my technical support
> > emails.
> > https://raptorcs.com/
> > 
> > With two CPU present you would have 4 PCI-e 4.0 x16 slots with one of
> > those x8 electrical although they aren't dual slot spaced so you would
> > need
> > either an expansion system or single slot cards such as the Radeon Pro WX
> > series.
> > POWER9 is about to be released and it has a variety of advantages such as
> > PCI-e 4.0 and 4 SMT threads per core for sforza.


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