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Re: [Xen-users] Xen to simulate an RTOS

  • To: "deepak verghese" <lildeepak@xxxxxxxxxxx>
  • From: "Henning Sprang" <henning_sprang@xxxxxx>
  • Date: Wed, 18 Apr 2007 18:06:10 +0200
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 18 Apr 2007 09:04:53 -0700
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On 4/17/07, deepak verghese <lildeepak@xxxxxxxxxxx> wrote:
Is Xen capable of all this? Is Xen capable of
simulating a Real Time OS ?

What do mean with "simulating a real time os"?
Xen is only a hypervisor, and "normally", people run an OS inside it -
you can look at the "mini-os" in the xen sources to see a minimal OS,
but without any os as guest, you have no devices, no IO, nothing.

xen has mutliple schedulers, and playing with their options can have
many effects in terms of "real-time-ness".

But, if you run an OS inside Xen, you have to configure Xen and the
guest OS, and maybe the host OS, which hists the drivers, correctly to
get real time features.
This can probably be done, but it seems to be more complex than just
running a Linux modfied/configured for realtime use.


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