Re: [Emc-users] Xenomai, machinekit

2016-01-14 Thread andy pugh 
On 14 January 2016 at 22:00, Jeff Epler  wrote:
> linuxcnc.org has no xenomai kernel support in its stable or development
> branches.  The version in what is now the machinekit fork was never made
> into a form that could be merged with standard linuxcnc.

I don't think that Machinekit are that fond of Xenomai any more.
http://blog.machinekit.io/2015/11/and-winner-is-rt-preempt.html

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Re: [Emc-users] Xenomai, machinekit

2016-01-14 Thread Karlsson & Wang 
> > linuxcnc.org has no xenomai kernel support in its stable or development
> > branches.  The version in what is now the machinekit fork was never made
> > into a form that could be merged with standard linuxcnc.  This doesn't
> > mean that no Xenomai support can ever be merged, but nobody seems to be
> > doing the work.
> >
> > Jeff
> >
> 
> Its also a bit doubtful what advantage Xenomai has over current Preempt-RT 
> kernels on modern hardware

Xenomai and RTAI also handle priority for code executed from interrupt although 
there still is SMI. There is enough computing power but sometimes it happens 
CPU is not avaiable then needed.

New microcontrollers with a Cortex CPU have a nested interrupts with prioirity 
and I often used it as a hardware scheduler. Even though micro controller run 
at much lower clock frequency scheduling is perfect so it is a big difference.


Nicklas Karlsson

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Re: [Emc-users] Xenomai, machinekit

2016-01-14 Thread Peter C. Wallace 
On Thu, 14 Jan 2016, Jeff Epler wrote:

> Date: Thu, 14 Jan 2016 16:00:55 -0600
> From: Jeff Epler <jep...@unpythonic.net>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] Xenomai, machinekit
> 
> linuxcnc.org has no xenomai kernel support in its stable or development
> branches.  The version in what is now the machinekit fork was never made
> into a form that could be merged with standard linuxcnc.  This doesn't
> mean that no Xenomai support can ever be merged, but nobody seems to be
> doing the work.
>
> Jeff
>

Its also a bit doubtful what advantage Xenomai has over current Preempt-RT 
kernels on modern hardware


RTAI: (usually better than Xemomai)

http://freeby.mesanet.com/g3258-rtai.png

Preempt-RT

http://freeby.mesanet.com/h97-g3258-preemt-rt.png


Peter Wallace
Mesa Electronics

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(")_(") signature to help him gain world domination.


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[Emc-users] Xenomai, machinekit

2016-01-14 Thread Karlsson & Wang 
Do anybody know how to compile for xenomai?

I use the xenomai kernel. Linuxcnc I compiled myself run in user space and 
there is a huge difference between this and the version from machinekit which 
use xenomai real time.

Regards Nicklas Karlsson

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Re: [Emc-users] Xenomai, machinekit

2016-01-14 Thread Jeff Epler 
linuxcnc.org has no xenomai kernel support in its stable or development
branches.  The version in what is now the machinekit fork was never made
into a form that could be merged with standard linuxcnc.  This doesn't
mean that no Xenomai support can ever be merged, but nobody seems to be
doing the work.

Jeff

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Re: [Emc-users] Xenomai, machinekit

2016-01-14 Thread Gene Heskett 
On Thursday 14 January 2016 17:00:55 Jeff Epler wrote:

> linuxcnc.org has no xenomai kernel support in its stable or
> development branches.  The version in what is now the machinekit fork
> was never made into a form that could be merged with standard
> linuxcnc.  This doesn't mean that no Xenomai support can ever be
> merged, but nobody seems to be doing the work.
>
> Jeff
>
I did build it, on my lathes atom box, perhaps 18 months back.  It ran 
linuxcnc but the latency was about double the regular kernel, so I've 
not ran it since.

But it no longer exists as I've re-installed from the hybrid.iso.  The 
hard drive upchucked.

Cheers, Gene Heskett
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