[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] Direct I/O to domU seeing a 30% performance hit
> I was asked to test direct I/O to a PV domU. Since, I had a system with > two NICs, I gave one to a domU and one dom0. (Each is running the same > kernel: xen 3.0.3 x86_64.) > > I'm running netperf from an outside system to the domU and dom0 and I am > seeing 30% less throughput for the domU vs dom0. That doesn't make sense -- they should be identical. Is there other stuff going on in the system that could be taking CPU time away from the domU? Ian > Is this to be expected? If so, why? If not, does anyone have a guess as > to what I might be doing wrong or what the issue might be? > > Thanks, > > John Byrne > > > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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