Re: [Xenomai-help] FPU not available in user-space programs

[Jan Kiszka <jan.kiszka@domain.hid>]

[-- Attachment #1: Type: text/plain, Size: 869 bytes --]

Rodrigo Rosenfeld Rosas wrote:
> Hi,
> 
> I was looking at /proc/xenomai/faults and noticed that the only errors
> were on TRAP 7 (FPU not available).
> 
> Each time I run the user-space program using the native skin, I
> increment the fault by one. I don't understand why this happens. From
> documentation, FPU should be enabled automatically for user-space programs.
> 
> Any ideas why I'm getting this error and what does it mean? Should I do
> some float-point operation before creating my real-time tasks?
> 

Watch out for the thread "T_FPU without effect" on xenomai-core, I
stumbled over this some time ago as well. It's an initial fault that
happens only on first FPU usage from user-space.

I'm not up-to-date with its current state, i.e. if there are plans to
solve this differently. Maybe Gilles or Philippe can comment on it.

Jan


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 250 bytes --]