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xen-devel
Re: [Xen-devel] HYBRID: PV in HVM container
On Thu, 28 Jul 2011, Mukesh Rathor wrote:
> Hi folks,
>
> Well, I did some benchmarking and found interesting results. Following
> runs are on a westmere with 2 sockets and 10GB RAM. Xen was booted
> with maxcpus=2 and entire RAM. All guests were started with 1vcpu and 2GB
> RAM. dom0 started with 1 vcpu and 704MB. Baremetal was booted with 2GB
> and 1 cpu. HVM guest has EPT enabled. HT is on.
>
> So, unless the NUMA'ness interfered with results (using some memory on
> remote socket), it appears HVM does very well. To the point that it
> seems a hybrid is not going to be worth it. I am currently running
> tests on a single socket system just to be sure.
>
The high level benchmarks I run to compare PV and PV on HVM guests show
a very similar scenario.
It is still worth having HYBRID guests (running with EPT?) in order to
support dom0 in an HVM container one day not too far from now.
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