On Monday 28 October 2013 10:44:40 Barney Holmes did opine:
> Quoting Brett McCoy :
I have not yet looked at SteamOS, but you are claiming realtime for it.
That pulls my curiosity trigger because one of my hobbies is CNC
machinery, and its realtime demands are far more stringent than some .1
millisecond accurate audio delivery. Currently we are running linuxcnc on
2.6.32-122-RTAI, but that RTAI patch is invasive as hell, and extremely
difficult to apply to a newer kernel, so we are running on Ubuntu-10.04.4
LTS yet, with an occasional hiccup at other functions.
If SteamOS is claiming real time, just how "realtime" is it? We need to
have an I/O heartbeat running at a 20 to 25 u-sec rate, with not over a 3
u-sec jitter in that timing to run well. Currently the intel atom based
boards are the goto boards for that, but we could sure use some additional
iron in the mix, which oddly, seems to point toward the BeagleBoneBlack
because of its bank of programmable realtime units (PRU's) and a true feast
of I/O pin availability that can serve as the step pulse generators.
I have an old HP box with a 1 Ghz athlon in it that could serve as a proof
of concept box if this is downloadable and buildable on it.
So, what say you that have tasted this?
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Immanuel Kant but Kubla Khan.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
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