On Sun, Oct 26, 2008 at 11:40 PM, Chris Morley
<[EMAIL PROTECTED]> wrote:
>
> I have been reading a little about RTAI and Xenomai.
> I wonder Why EMC choose RTAI, Other then at the time Xenomai may not have 
> been available (around 2005?).

Xenomai is only, very, very recent 'invention'

> It seems that Xen is developed more or maybe more openly - I can find more 
> info on it by far.
> Comparisons are rare but it seems that RTAI has possibly 10% less latency  
> and Xen is more flexible in regards to platforms,architecture and debugging 
> capability.

At the time of the EMC beginnings, there were little choices and
eventually something worked well enough :). Remember the 133MHz
computers we used that time? Loading a webpage today on one would make
it crash.

> If EMC and or HAL is to be used with anything else besides X86 could the 
> realtime patch change?

As far as I understand it the complications are similar to convering
to AMD64 support. It is possible, but takes time.

> Is there any real intention to be able to use EMC/HAL with anything besides 
> X86?

There was slight interest, but the neverending inflow of better and
faster x86 computers made it go away. Also better control cards are
now available.

> Is the reason for RTAI over any other - lowest latency number, Why change 
> what works, No interest, or a technical reason?
> I take it that EMC does not actively use RT-linux anymore because RTAI was 
> better?

Isn't RT-linux proprietary (or used mostly on proprietary aerospace systems?)

> Just curious really

Just what I remember out of my head. (or trunk?)

>
> Chris Morley
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