[mythtv-users] ION "LE" suitable for VDPAU ?

[Brian Wood]

On Wednesday 11 November 2009 02:20:40 Jeppe Nejsum Madsen wrote:
> Brian Wood <beww at beww.org> writes:
> > On Tuesday 10 November 2009 20:51:18 Travis Tabbal wrote:
> >> On Tue, Nov 10, 2009 at 9:52 AM, Brian Wood <beww at beww.org> wrote:
> >> > On Tuesday 10 November 2009 09:45:14 Travis Tabbal wrote:
> >> > > I've since moved my backend onto a large server running in a VM.
> >> > > It's working very well. My Frontends are now very overpowered with
> >> > > VDPAU decoding the video.
> >> >
> >> > I take that to mean your capture devices are runing on a VM. Are you
> >> > using any
> >> > PCI tuners on the VM? I can see USB or network (HDHR) tuners working
> >> > well on
> >> > a VM, but I have doubts as to whether a PCI tuner would work or not.
> >> >
> >> > I have a large server with lots of excess capacity, if I could get PCI
> >> > tuners
> >> > to work in a VM (using Virtualbox right now), I'd consider moving my
> >> > B/E to that.
> >>
> >> No. I'm using an HDHR here, and if I upgraded I would add another one. I
> >> doubt PCI tuners would work with VirtualBox, but you might be able to
> >> get them working with Xen. They have PCI Passthrough in newer builds.
> >> You could always have the VM host run the backend and move other tasks
> >> that don't need direct I/O to VMs if you have any that would work well
> >> that way.
> >
> > I thought abou Xen, but Xen requires CPUs with hardware vittualization,
> > and this server is a pair of Opteron 275s, so that's not an option.
>
> No, not if you only need to run Linux. I'm running my backend under Xen
> with a Nova-T 500 pci card with no problems. While my CPU supports hw
> virt, I'm not using it since it has higher overhead and, coincidentally,
> doesn't support pci passthrough (or at least it didn't in Xen 3.0)
>
> You can search the list for details....

That's certainly food for thought, thanks.

-- 
Brian Wood
beww at beww.org