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Re: [vfio-users] vfio, xeon e3s, acs, & gpus -- oh my!



I decided to go with an E6-1650 v4 / C612 based motherboard as I wanted
both ECC memory and a BMC. This required switching from U to RDIMMs,
which I typically don't use in a desktop, but there is theoretically a
small RAS improvement with RDIMMs.  The cost works out to ~$350 more
than a E3 system at the same clock rates, and dropping from kaby lake to
broadwell.  However, it is a jump from 2-4 memory channels, additional
DIMM slots, and 2 additional cores.

-Josh

--
On 04/01/2017 10:44 PM, Joshua Lee wrote:
> That's the total price, counting the motherboard, btw.
>
> On Sun, Apr 2, 2017 at 1:43 AM, Joshua Lee <joshua613 gmail com
> <mailto:joshua613 gmail com>> wrote:
>
>     What do you mean by "iffy"? My $200 x99 board has seperate IOMMU
>     groups per-device, and a i7 5820k/6800k or, if you want it
>     cheaper, an E5-1620v3 or 1620v4, can do ACS and sane IOMMU groups
>     with it for under $600 also, without needing to get a used
>     processor...
>
>     On Fri, Mar 31, 2017 at 8:11 PM, Taiidan gmx com
>     <mailto:Taiidan gmx com> <Taiidan gmx com
>     <mailto:Taiidan gmx com>> wrote:
>
>         Intel's stuff is really iffy about ACS unless you buy one of
>         the overpriced two thousand dollar processors, they use it for
>         artificial market segmentation so that they can say the
>         desktop processors and the E3 etc doesn't "support" sr-iov etc.
>
>         If you want to do this without spending lots of money I would
>         go with a coreboot compatible G34 Opteron setup, I have a
>         KGPE-D16 and it has ACS + IOMMU with interrupt remapping (and
>         every device gets its own IOMMU group) - I play games in VM on it.
>
>         You can get the board for $400 and a used quality 16 core CPU
>         for around $100, there is also a port of the OpenBMC network
>         kvm in progress - which will make it the first blob free
>         server board with feature equivalency to the proprietary stuff.
>
>         https://www.coreboot.org/Board:asus/kgpe-d16
>         <https://www.coreboot.org/Board:asus/kgpe-d16>
>
>
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>


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