From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 08 Jan 2008 14:58:16 +0100
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-help] posix functions for real time and non real time
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai@xenomai.org, "M. Koehrer" <mathias_koehrer@domain.hid>

Gilles Chanteperdrix wrote:
> On Jan 8, 2008 2:44 PM, Jan Kiszka <jan.kiszka@domain.hid> wrote:
>> Gilles Chanteperdrix wrote:
>>> When you try to mix up real-time and non real-time threads, it all
>>> becomes very complicated. You do not need your complication: just make
>>> all your tasks real-time tasks (using priority 0 for low priority
>>> tasks) and forget about __real_* calls.
>> That can be inefficient in large applications: You don't need the
>> (average-case) overhead of Xenomai IPC for pure non-RT interaction. And
>> IPC object creation is precisely the critical point, because their type
>> cannot be told apart by the wrapping layer based on generic parameters.
> 
> The point is that you usually do not care.
> 

My customer does. :)

E.g. note that Xenomai IPC does not scale on SMP like glibc/futux-based
stuff does (repeating once again: in the average case).

What I forgot:
> That said, I will probably create the __xn_pthread_* calls aliases to
> __wrap_pthread_* calls, but for an entirely different reason: to let
> user applications use --wrap if they need to.

Just for aesthetic reasons: Can we avoid the leading "__" for this
welcomed alternative?

Jan

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