[Xenomai-help] vxworks- and posix-skin simultaneously

[Xenomai-help] vxworks- and posix-skin simultaneously

[Roderik_Wildenburg]

Can anybody tell me about the actual state of using vxworks-skin and posix-skin simultaneously ? Is it possible, compiling one application with vxWorks-skin and an other one with the posix-skin and to use/execute these two applications simultaneously on one system ?

In an earlier posting I have read, that all skins (or at least the native and the posix one) should be compiled as modules, so they do not overide the timer mode. Is this still true ? And if yes, dosn´t need the posix skin an aperiodic timer, but the timer is set to periodic mode by the vxworks skin ? So, can an vxworks application and an posix applications run together ??

Thank you for help and best regards 
Roderik

Re: [Xenomai-help] vxworks- and posix-skin simultaneously

[Gilles Chanteperdrix]

Roderik_Wildenburg@domain.hid wrote:
> Can anybody tell me about the actual state of using vxworks-skin and posix-skin
> simultaneously ? Is it possible, compiling one application with
vxWorks-skin and
> an other one with the posix-skin and to use/execute these two applications
> simultaneously on one system ?
> 
> In an earlier posting I have read, that all skins (or at least the native and the
> posix one) should be compiled as modules, so they do not overide the
timer mode.
> Is this still true ? And if yes, dosn´t need the posix skin an
aperiodic timer,
> but the timer is set to periodic mode by the vxworks skin ? So, can an
vxworks
> application and an posix applications run together ??

Yes, it is possible, but the two skins would share the same timer, and
since this timer has to be in periodic mode for the vxworks skin, you
would have to run the posix skin in periodic mode too. This should work,
but of course you would not get the same timer resolution as the one you
get in aperiodic mode.

-- 
                                                 Gilles Chanteperdrix

Re: [Xenomai-help] vxworks- and posix-skin simultaneously

[Jan Kiszka]

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Roderik_Wildenburg@domain.hid wrote:
> Can anybody tell me about the actual state of using vxworks-skin and posix-skin simultaneously ? Is it possible, compiling one application with vxWorks-skin and an other one with the posix-skin and to use/execute these two applications simultaneously on one system ?

Yes, feasible. There are example applications available for both skins,
so setting up your own quick test will not take you much time.

> 
> In an earlier posting I have read, that all skins (or at least the native and the posix one) should be compiled as modules, so they do not overide the timer mode. Is this still true ? And if yes, dosn?t need the posix skin an aperiodic timer, but the timer is set to periodic mode by the vxworks skin ? So, can an vxworks application and an posix applications run together ??

It's true that the vxworks skin still forces the nucleus into periodic
timer mode. This is a known shortcoming of the current timer subsystem.
As announced earlier, we are aiming at a redesign to overcome this
during the 2.4 development cycle. Ideas exist, remaining issues are also
identified. But our resources are still limited, so there is no promise
on a time-frame.

Anyway, if you do not rely on having sub-tick timer precision for the
posix applications you are planning, the available support should
already be fine for you.

Jan


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