[Xenomai-help] printf() allowed in xenomai?

[Xenomai-help] printf() allowed in xenomai?

[Steven Scholz]

Hi all,

I wonder if there exists a document that describes to Dos and Donts when
programming real time applications with Xenomai.

For excample is it allowed to used glibc funkctions like printf()?

Thanks,

Steven

Re: [Xenomai-help] printf() allowed in xenomai?

[Philippe Gerum]

On Thu, 2007-01-25 at 12:27 +0100, Steven Scholz wrote:
> Hi all,
> 
> I wonder if there exists a document that describes to Dos and Donts when
> programming real time applications with Xenomai.
> 

This is a good starting point, discussing about basic issues to keep in
mind when using something based on a co-kernel technology:
http://www.xenomai.org/documentation/branches/v2.0.x/pdf/Native-API-Tour.pdf
http://www.xenomai.org/documentation/branches/v2.0.x/pdf/Life-with-Adeos.pdf

> For excample is it allowed to used glibc funkctions like printf()?

Yes, but time-wise, this costs you predictability. You may want to grep
the mailing list archive about "secondary mode switch" and the like.

> 
> Thanks,
> 
> Steven
> 
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
-- 
Philippe.

Re: [Xenomai-help] printf() allowed in xenomai?

[Steven Scholz]

Philippe,

>> I wonder if there exists a document that describes to Dos and Donts when
>> programming real time applications with Xenomai.
> 
> This is a good starting point, discussing about basic issues to keep in
> mind when using something based on a co-kernel technology:
> http://www.xenomai.org/documentation/branches/v2.0.x/pdf/Native-API-Tour.pdf
> http://www.xenomai.org/documentation/branches/v2.0.x/pdf/Life-with-Adeos.pdf

Thanks!

>> For excample is it allowed to used glibc funkctions like printf()?
> 
> Yes, but time-wise, this costs you predictability. You may want to grep
> the mailing list archive about "secondary mode switch" and the like.

Would you please state in one line what "secondary mode switch" means?
Is it the switch from xenomai to linux?

Steven

Re: [Xenomai-help] printf() allowed in xenomai?

[Philippe Gerum]

On Thu, 2007-01-25 at 12:54 +0100, Steven Scholz wrote:
> Philippe,
> 
> >> I wonder if there exists a document that describes to Dos and Donts when
> >> programming real time applications with Xenomai.
> > 
> > This is a good starting point, discussing about basic issues to keep in
> > mind when using something based on a co-kernel technology:
> > http://www.xenomai.org/documentation/branches/v2.0.x/pdf/Native-API-Tour.pdf
> > http://www.xenomai.org/documentation/branches/v2.0.x/pdf/Life-with-Adeos.pdf
> 
> Thanks!
> 
> >> For excample is it allowed to used glibc funkctions like printf()?
> > 
> > Yes, but time-wise, this costs you predictability. You may want to grep
> > the mailing list archive about "secondary mode switch" and the like.
> 
> Would you please state in one line what "secondary mode switch" means?
> Is it the switch from xenomai to linux?
> 

>From the xenomai scheduler to the Linux scheduler, yes. You should find
some insights about this in the tech. articles  I just mentioned.

> Steven
-- 
Philippe.