28 Oct
2013
28 Oct
'13
5:51 p.m.
On Monday 28 October 2013 12:33:34 Paul Davis did opine:
On Mon, Oct 28, 2013 at 11:05 AM, Gene Heskett
<gheskett(a)wdtv.com> wrote:
Thats what I was thinking too. There is another patch set we have used
experimentally that seems almost as good, the Xenomai branch and some of
the guys who are running servo only systems are quite enthusiastic about
it. Servo systems aren't as sensitive to stumbles in the stepper rates,
generally tolerating millisecond response times fairly well.
My experiences with the earlier versions of the RT patch set were less than
satisfactory, but that was 6 or 7 years ago. The first thing it did was
kill tvtime, but now we're all digital here in the states so its Kaffeine
to the rescue, but I've not a clue if it works with the current RT kit.
Have any of you played with the Xenomai patches for your audio work?
Thanks Paul.
Cheers, Gene
--
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If you want to travel around the world and be invited to speak at a lot
of different places, just write a Unix operating system.
-- Linus Torvalds
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
law-abiding citizens.
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,
[ ... ]
If SteamOS is claiming real time, just how "realtime" is it?
There is no comparing even the RT kernel with RTAI. They are totally
different conceptions. RTAI is basically a microkernel that runs a
normal kernel as a client. It requires drivers for every device that is
included in "realtime land" (i.e. for audio, you cannot use ALSA, you
would need new drivers that run in the RT executive.
SteamOS *might* use the RT kernel, but I'd be incredibly surprised if
they even considered RTAI.