Re: [Xen-devel] Some trouble to use NVIDIA CUDA with Xen

[Gordan Bobic <gordan@xxxxxxxxxx>]

Your Nvidia device ID seems to imply a GTX770.
I could be wrong, but wasn't this only supported on Quadro/Grid GPUs?
Or is that limitation only applicable to Windows?

Gordan

On Sat, 10 Aug 2013 18:21:32 +0200 (CEST), Martin Cerveny 
<martin@xxxxxxxxx> wrote:
> Hello.
>
> Any progress on this topics ?
> What is the blocker to run correctly NVIDIA (proprietary) drivers in
> kernel in XEN/Dom0 ?
>
> The problem still persit:
>
> - CUDA "deviceQuery" run and exit without error (BUT with xen after
> 9sec, without xen after 1sec)
> - CUDA other programs for example "bandwidthTest" exit with error
> "code=46(cudaErrorDevicesUnavailable)"
>
> Test environment:
>
> - fedora18
> - kernel 3.9.11-200.fc18.x86_64
> - nvidia drivers 319.37 (comes with CUDA)
> - nvidia CUDA 5.5
> - XEN 4.2.2 and directly from git repo 4.4.unstable (commit
> 73f18583dd824f0e49f65149ef603600ce31b8ee)
> - AMD Athlon(tm) 64 X2 Dual Core Processor 5600+
>
> Attached files:
>
> - output from dmesg, deviceQuery (with /bin.time), bandwidthTest
> (with /bin/time), lspci -vvv
>
> Hypotehesis:
>
> - PCI output are the same - probably no problem
> - dmesg differences ( diff dmesg_boot_without_xen_wt.txt
> dmesg_boot_xen_44u_wt.txt )
>
> ======================
> without XEN:
>
> < MTRR default type: uncachable
> < MTRR fixed ranges enabled:
> <   00000-9FFFF write-back
> <   A0000-EFFFF uncachable
> <   F0000-FFFFF write-protect
> < MTRR variable ranges enabled:
> <   0 base 0000000000 mask FF80000000 write-back
> <   1 base 0080000000 mask FFC0000000 write-back
> <   2 disabled
> <   3 disabled
> <   4 disabled
> <   5 disabled
> <   6 disabled
> <   7 disabled
> < x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
>
> ======================
> with XEN:
>
> > NVRM: PAT configuration unsupported.
> ======================
>
> The MTRR+PAT is not supported (still) in kernel in XEN/dom0 ?
> Maybe MTRR+PAT is needed for CUDA too.
>
> Is there any workaround for linux kernels ~ 3.9.x and xen ~ v4.x.x ?
>
> Thanks, Martin Cerveny
>
> Refs:
>
> [Xen-devel] XEN MTRR -
> http://lists.xen.org/archives/html/xen-devel/2012-06/msg00194.html
> [Xen-users] Xen and nvidia -
> http://lists.xen.org/archives/html/xen-users/2013-01/msg00169.html

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