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xen-users
Re: [Xen-users] Trying CUDA/OpenCL with VGA Passthrough
On Thu, Mar 03, 2011 at 08:31:08PM +0100, Claudio Tanci wrote:
> Hi everyone,
>
> First post, already a call for help :)
>
> I'm trying to use a gtx 580 with Xen 4 VGA Passthrough to test CUDA
> performances, the MB is an Asus P7P55 LX with a i7 870, VT-D is enabled
> in bios and reported as active by Xen.
> I'm using Debian Squeeze as Dom0 and DomU OS.
>
> Dom0 is configured with iommu=1 and iommu=verbose parameters and
> xen-pciback.hide=(01:00.0)(01:00.1) (but I still see them with lspci in
> dom0, is that normal?)
>
> I configured DomU .cfg VGA passthrough with
> gfx_passthru=1
> pci=['01:00.0']
>
> and can see the devices as assignable
> root@cloud:~/nvidia# xm pci-list-assignable-devices
> 0000:01:00.0
> 0000:01:00.1
> (0000:01:00.1 refers to the hdmi audio port)
>
> and then assigned to the DomU
> root@cloud:~/nvidia# xm pci-list squeeze1
> domain bus slot func
> 0x0000 0x01 0x00 0x0
>
> I can see the card in the DomU
> root@squeeze1:~# lspci
> 00:00.0 VGA compatible controller: nVidia Corporation Device 1080 (rev
> a1)
>
> I installed the video driver, cuda toolkit and Nvidia SDK and everything
> seems fine, the module is loaded and the devices exists (No X as I will
> use the machine only as a test bed for CUDA on virtualized hardware)
> root@squeeze1:~# lsmod
> Module Size Used by
> nvidia 10442361 0
> snd_pcm 60551 0
> snd_timer 15582 1 snd_pcm
> snd 46446 2 snd_pcm,snd_timer
> soundcore 4598 1 snd
> snd_page_alloc 6249 1 snd_pcm
> i2c_core 15712 1 nvidia
> evdev 7352 0
> pcspkr 1699 0
> ext3 106502 1
> jbd 37085 1 ext3
> mbcache 5050 1 ext3
> xen_netfront 16257 0
> xen_blkfront 9435 2
>
> root@squeeze1:~# ls -lh /dev/nvidia*
> crw-rw-rw- 1 root root 195, 0 Mar 3 16:26 /dev/nvidia0
> crw-rw-rw- 1 root root 195, 255 Mar 3 16:26 /dev/nvidiactl
>
> but deviceQuery fails accessing the card :(
> ./NVIDIA_GPU_Computing_SDK/C/bin/linux/release/deviceQuery Starting...
>
> CUDA Device Query (Runtime API) version (CUDART static linking)
>
> [ 3276.036642] NVRM: failed to register with the ACPI subsystem!
> [ 3276.047716] NVRM: RmInitAdapter failed! (0x23:0x2f:646)
> [ 3276.047737] NVRM: rm_init_adapter(0) failed
> [ 3276.047839] NVRM: failed to unregister from the ACPI subsystem!
> cudaGetDeviceCount FAILED CUDA Driver and Runtime version may be
> mismatched.
>
> I'm using cuda toolkit 3.2.16, sdk_3.2.16 and I tried both dev driver
> 260.19.26 and 270.29
> The kernel in Dom0 is the 2.6.32-5-xen-amd64 as packaged in Debian, Xen
> package version is 4.0.1-2.
>
> Any idea?
>
Most probably you need to do custom patching for your graphics hardware.
I think it's the vBar=pBar patch that you need to modify/add.
-- Pasi
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