Re: [Xenomai-help] Running Xenomai in a virtual machine

[Johan Visser <johan.visser@domain.hid>]

Jan Kiszka schreef:
> Sebastian Smolorz wrote:
>   
>> Peter Soetens wrote:
>>     
>>> I'm looking for a more agile way to run my unit tests (and build farm)
>>> on a Xenomai system, without running them directly my development
>>> system (nor rebooting to a Xenomai patched kernel). I was hoping that
>>> a virtualisation solution would do the trick. Does anyone have
>>> experience with running a Xenomai patched kernel + applicaiton in
>>> vmware or another virtualisation package ?
>>>
>>>       
>> Xenomai runs perfectly inside qemu, without real-time guarantees, of course.
>>
>>     
>
> Most of the time we are developing on and for Xenomai inside qemu-kvm,
> often using '-smp 2' (or more) and an SMP host so that the more
> interesting races are triggered. In contrast to other hypervisors, this
> offers the chance to do source-level kernel debugging, also when the
> target hopelessly locked up deep inside I-pipe - situations that are
> almost undebugable on real x86 hardware.
>
> For sure, you don't get reasonable latencies this way (though evaluating
> kvm under -rt /wrt soft-rt is on my to-do list for the next weeks), but
> a lot of testing does not require this anyway. Moreover, qemu/kvm
> cleanly integrates with Linux, thus can easily be scripted. If you plan
> to set up some test farm, you may also want to have a look at
> kvm-autotest (currently under merge into autotest).
>
> Jan
>
>   
Just the last few days we were trying to do the same with our XENOMAI 
system and application.

According the package info I can not use KVM because the processor of my 
laptop does not have hardware virtualisation support.
Virtualbox failed on a standard PC , it took 5 minutes to boot my guest 
and then after that froze.
VMware runs, but gives heavy CPU load ( about 38 % ) instead of 6-8 % on 
a real system.
The application runs, but of course it is not realtime.

The system i am using on my laptop is a standard Ubuntu system.

I was wondering if the kernel running on my host system is of importance 
too.
Now it schedules at 250 HZ. I tried to use a -rt kernel fom the ubuntu 
repository ( 1000 Hz ) but this will not work on my system some how.

-- 
Ing. Johan Visser
Stork Plastics Machinery B.V.
Tel. : +31 742405113
Mob. : +31 653731518

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