[Xen-users] RE: VT-d "partial" success - passing DVB-S tuner to Windows DomU (based off previous thread of similar name!)Link to this message

[Darren Foo <darrenfoo@xxxxxxxxx>]

Daniel,

I don't know if you found a solution to your problem, I'm currently passing a 
DVB-S card through to my XPSP3 DomU with Mediaportal as the streaming app. 
Anyhow, I was having performance issues with my mpeg2 streams as well. I ended 
up doing the following on my Q6600:
xm vcpu-set Domain-0 3  
xm sched-credit -d DomU -w 2048


With the Dom0 pinned to 3 cpus, and my DomU on the fourth, and the 
creditscheduler set much higher on my DomU the CPU utilization is much less of 
a problem. Originally my CPU usage would spike for no reason in my DomU, now it 
rarely does if at all. Unfortunately, giving my DomU 2 CPU's seems to break 
something in Mediaportal. I was able to pin the service to 1 CPU but I still 
had a few issues. I haven't been checking to much lately on Xen but I'm curious 
what 3.3.0 brings for VT-d and HVM performance.


Daniel Kao wrote: 

>Hi All, 
>So I've got a DVB-S PCI Express card ($30 USD Twinhan AD-SE200 off eBay) 
that's being passed via VT-d/pciback >in Xen 3.2.1 under CentOS 5.2 to a 
Windows XP SP3 which works! ... except for one small issue... snip


      

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