[Xenomai] AVX Support

[Xenomai] AVX Support

[subscribe010304]

Dear all,
in order to find out if Xenomai were an appropriate real-time developer framework for our design
task I am trying to collect some first information about it.
I read the documentation that is provided on the Xenomai web pages but I could not find any
information about AVX support on x86_64 target platforms.
The wikipedia entry on AVX does not list Xenomai under operating system support.
Isn't AVX supported by Xenomai?

Thanks in advance,
with kind regards,

Guido

Re: [Xenomai] AVX Support

[Lennart Sorensen]

On Sat, Mar 01, 2014 at 06:57:53PM +0100, subscribe010304@hushmail.com wrote:
> in order to find out if Xenomai were an appropriate real-time developer framework for our design
> task I am trying to collect some first information about it.
> I read the documentation that is provided on the Xenomai web pages but I could not find any
> information about AVX support on x86_64 target platforms.
> The wikipedia entry on AVX does not list Xenomai under operating system support.
> Isn't AVX supported by Xenomai?

I don't see what xeonmai has to do with it.  As far sa I can tell AVX
are just some new instructions.  It adds no new registers or cpu modes,
so as for as the OS or xenomai is concerned, nothing has changed.

I can't see any reason it shouldn't work fine.

-- 
Len Sorensen

Re: [Xenomai] AVX Support

[Jan Kiszka]

On 2014-03-01 22:53, Lennart Sorensen wrote:
> On Sat, Mar 01, 2014 at 06:57:53PM +0100, subscribe010304@hushmail.com wrote:
>> in order to find out if Xenomai were an appropriate real-time developer framework for our design
>> task I am trying to collect some first information about it.
>> I read the documentation that is provided on the Xenomai web pages but I could not find any
>> information about AVX support on x86_64 target platforms.
>> The wikipedia entry on AVX does not list Xenomai under operating system support.
>> Isn't AVX supported by Xenomai?
> 
> I don't see what xeonmai has to do with it.  As far sa I can tell AVX
> are just some new instructions.  It adds no new registers or cpu modes,
> so as for as the OS or xenomai is concerned, nothing has changed.
> 
> I can't see any reason it shouldn't work fine.

AVX requires a different approach to save/retore the "FPU" context on
task switches. We added this to ensure AVX compatibility (and speed up
switches as well). switchtest is actually stressing this. So, yes, it
should work fine. No guarantees on AVX2, though, this wasn't explored yet.

Jan


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