Re: [LAU] OS for realtime operation

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To: <f.rech@...>
Cc: <linux-audio-user@...>
Date: Wednesday, January 11, 2012 - 1:11 pm

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Oh I see.
Thanks for the clarification and again please excuse my ignorance int the
field of computer technology :).

Just to get it right, some of you said that I don't need a real time
kernel? How that? Are there people on this list who do serious audio work
and do NOT use an rt-kernel? If so is it really recomended doing so?

Thanks again to you all!
Love Linux and the community...

Moshe

On Tue, Jan 10, 2012 at 9:17 PM, fred wrote:

>

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Oh I see.Thanks for the clarification and again pleas=
e excuse my ignorance int the field of computer technology :).Just to get it right, some of you said that I don't need a=
real time kernel? How that? Are there people on this list who do serious a=
udio work and do NOT use an rt-kernel? If so is it really recomended doing =
so?
Thanks again to you all!=A0Love Linux and th=
e community...MosheOn Tue, Jan 10, 2012 at 9:17 PM, fred <f.rech@yahoo.fr> wrote:

Le 10/01/2012 13:44, Paul Davis a =E9crit :

On 1/10/12, Jeremy Jongepier<jeremy@autostatic.com> =A0wrote:
=A0

On 01/09/12 23:01, Moshe Werner wrote:
=A0 =A0

Something little OT, but what exactly is the difference between
Windows/Mac, where one doesn't need an rt kernel to run realtime
processes,
and Linux which needs one?
=A0 =A0 =A0

Hello Moshe,

On Linux you don't need a real-time kernel to run real-time processes
either.
=A0 =A0

to clarify a little more:

1) on linux, **access** to realtime scheduling is not necessarily
granted to normal users, unlike the situation on windows and OS X. on
any sane linux system, this is easy to alter. on any sane linux system
that targets music/pro-audio/media production, its already set up that
way and so there is no difference between these systems and windows or
OS X in this regard.

2) the PREEMPT_RT kernel is substantially "more realtime" than an=
y
version of windows or OS X that you could lay your hands on. its more
like an actual realtime OS than the kind of general purpose OS that
regular Linux, Windows and OS X represent, though without actually
being suitable (quite) for "hard RT" tasks.
=A0

To add, even if it's not IMHO something good, (clearly it's a shame=
ful job) :
Linux machines are the standard for "high frequency trading"
Almost just because they can really go RT=

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=A0

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Messages in current thread:
[LAU] OS for realtime operation, Moshe Werner, (Mon Jan 9, 2:24 pm)
Re: [LAU] OS for realtime operation, Carlos sanchiavedraz, (Wed Jan 11, 2:43 pm)
Re: [LAU] OS for realtime operation, Josh Lawrence, (Thu Jan 12, 8:07 pm)
Re: [LAU] OS for realtime operation, Carlos sanchiavedraz, (Fri Jan 13, 12:02 pm)
Re: [LAU] OS for realtime operation, david, (Wed Jan 11, 5:05 pm)
Re: [LAU] OS for realtime operation, Dave Phillips, (Wed Jan 11, 2:47 pm)
Re: [LAU] OS for realtime operation, Carlos sanchiavedraz, (Thu Jan 12, 8:11 am)
Re: [LAU] OS for realtime operation, david, (Thu Jan 12, 8:25 am)
Re: [LAU] OS for realtime operation, Carlos sanchiavedraz, (Thu Jan 12, 4:08 pm)
Re: [LAU] OS for realtime operation, david, (Thu Jan 12, 6:00 pm)
Re: [LAU] OS for realtime operation, michael noble, (Tue Jan 10, 12:47 am)
Re: [LAU] OS for realtime operation, Ronald Stewart, (Tue Jan 10, 1:05 am)
Re: [LAU] OS for realtime operation, Jeremy Jongepier, (Mon Jan 9, 9:06 pm)
Re: [LAU] OS for realtime operation, Moshe Werner, (Mon Jan 9, 10:01 pm)
Re: [LAU] OS for realtime operation, Jeremy Jongepier, (Tue Jan 10, 9:02 am)
Re: [LAU] OS for realtime operation, Paul Davis, (Tue Jan 10, 12:44 pm)
Re: [LAU] OS for realtime operation, tee, (Thu Jan 12, 4:15 pm)
Re: [LAU] OS for realtime operation, david, (Fri Jan 13, 4:59 am)
Re: [LAU] OS for realtime operation, Raffaele Morelli, (Fri Jan 13, 7:45 am)
Re: [LAU] OS for realtime operation, Nicola Pandini, (Sat Jan 14, 10:38 am)
Re: [LAU] OS for realtime operation, Moshe Werner, (Mon Feb 20, 7:38 am)
Re: [LAU] OS for realtime operation, david, (Fri Jan 13, 8:43 am)
Re: [LAU] OS for realtime operation, fred, (Tue Jan 10, 7:17 pm)
Re: [LAU] OS for realtime operation, Moshe Werner, (Wed Jan 11, 1:11 pm)
Re: [LAU] OS for realtime operation, Fons Adriaensen, (Wed Jan 11, 2:55 pm)
Re: [LAU] OS for realtime operation, Brett McCoy, (Wed Jan 11, 1:39 pm)
Re: [LAU] OS for realtime operation, Diego Simak, (Tue Jan 10, 12:07 am)
Re: [LAU] OS for realtime operation, Jeremy Jongepier, (Tue Jan 10, 8:15 am)
Re: [LAU] OS for realtime operation, gene heskett, (Tue Jan 10, 2:43 pm)
Re: [LAU] OS for realtime operation, Jeremy Jongepier, (Tue Jan 10, 3:13 pm)
Re: [LAU] OS for realtime operation, Hartmut Noack, (Mon Jan 9, 5:29 pm)
Re: [LAU] OS for realtime operation, Moshe Werner, (Mon Jan 9, 5:53 pm)
Re: [LAU] OS for realtime operation, Hartmut Noack, (Mon Jan 9, 9:05 pm)
Re: [LAU] OS for realtime operation, Raffaele Morelli, (Mon Jan 9, 3:05 pm)
Re: [LAU] OS for realtime operation, Moshe Werner, (Mon Jan 9, 3:23 pm)
Re: [LAU] OS for realtime operation, Raffaele Morelli, (Tue Jan 10, 7:02 am)
Re: [LAU] OS for realtime operation, Fons Adriaensen, (Mon Jan 9, 4:03 pm)
Re: [LAU] OS for realtime operation, Joe Hartley, (Mon Jan 9, 3:58 pm)
Re: [LAU] OS for realtime operation, Moshe Werner, (Mon Jan 9, 4:24 pm)