[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-users] Lots of udp (multicast) packet loss in domU
On Tue, Jan 13, 2009 at 6:52 PM "Mike Kazmier" <DaKaZ@xxxxxxxxx> wrote: >Thanks for the reply James, there are some comments below but let me start by >stating that indeed this problem is NOT solved. When we removed the CPU cap >we only moved on to the NEXT problem. Here is the issue now, we are still >getting massive packet loss (now upwards of 60%) and it appears the bridge is >culprit. Again, we have approximately 600 Mbps of multicast (udp) traffic we >are trying to pass TO and then back FROM a domU, and then other domU's >occasionally grab and use this traffic. Each domU that starts seems to >consume >80% cpu of the dom0 - but only if it is passed the bridged ethernet >ports. So, maybe our architecture just isn't supported? Should we be using a >routed configuration (with xorp for a multicast router?) and/or just use >PCI-Passthrough? We don't see any such issues in PCI passthrough, but then >our domU's have to be connected via an external switch, and this is something >we were hoping to avoid. Any advice here would be great. According to http://www.cs.ucl.ac.uk/staff/M.Handley/papers/xen-vrouters.pdf, we may be looking at only using the PCI-Passthrough model :( They show extremely poor performance between the dom0 and domU. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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