Re: [Xen-devel] Fwd: System partitioning question

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Sun, 2013-10-27 at 19:27 +0000, Gordan Bobic wrote:
> It doesn't matter - any VM can run on any CPU core and none require a 
> dedicated CPU core. If your application is such that you are concerned 
> about latency, the chances are that no virtualization solution is going 
> to be good enough. Otherwise don't worry about it.

Actually, given the presence of sEDF and the arinc653 schedulers (both
of which have RT properties) and the simplicity of the ARM interrupt
injection path I think Xen on ARM is probably not in too bad a shape for
a soft-ish RT system, at least as a starting point for
testing/measuring/improving etc. It depends on the specific requirements
of course.

Also remember that through cpupools you can split the physical CPUs into
RT and non-RT pools, each with their own scheduler and assign domains to
the appropriate pool.

Ian.


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