Xen users - Aug 2008 - RE: VT-d "partial" success - passing DVB-S tuner to Windows DomU (based off previous thread of similar name!)Link to this message

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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