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[Xen-community] Is Xen compatible with Realtime?

To: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-community@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-community] Is Xen compatible with Realtime?
From: Mats Ahlgren <mats.ahlgren@xxxxxxxxx>
Date: Sun, 1 Feb 2009 16:08:12 -0500
Delivery-date: Sun, 01 Feb 2009 18:22:49 -0800
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I was just wondering if Xen and Realtime ("rt-" linux kernel, aka.
realtime-preemption) work fine together?
    (In the easiest use-case: the host providing realtime priority to
a single guest OS, and that guest OS can provide rt guarantees to its

Or is this unfortunately not feasible right now?

Thank you much,

---------- Forwarded message ----------
From: Mats Ahlgren <mats.ahlgren@xxxxxxxxx>
Date: Fri, Jan 30, 2009 at 6:04 PM
Subject: Re: Xen and Realtime?
To: xen-users@xxxxxxxxxxxxxxxxxxx

Would this be an appropriate question to ask xen-devel, xen-community,
xen-research, or none?

On Wed, Jan 28, 2009 at 6:33 PM, Mats Ahlgren <mats.ahlgren@xxxxxxxxx> wrote:
> Hello,
> I'm a new user to this list. I'm installing a new system and would
> really appreciate any insight to my question -- thank you very much!
> Scenario:
> - I'd like to use a Xen kernel for the obvious benefits it provides.
> - I'd also like to have an RT (aka. "realtime" / "realtime
> preemption") kernel for music/audio work, and also to enforce hard
> limits on unwieldy programs.
> Question:
> - Is Xen compatible with Realtime?
> Does such a Xen-RT-kernel even make sense, given that the host-OS
> might need to be aware of the realtime policies?
> And if it does make sense, might anyone know of an easy way to go
> about this without compiling a custom kernel with patches? (which is
> possible for me, but a bit of a pain)
> (This is a multicore machine, in case that affect recommendations.)
> Thank you very much,
> Mats

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