Hi Chuck and all,
On Fri, Oct 27, 2000 at 10:48:58AM -0400, [EMAIL PROTECTED] wrote:
>
> > I believe it is correct. If you call pthread_create() from init_module(),
> > the newly created RTthread starts running _immediately_ and you may be
> > unsure when the init_module() will be finished. This means, finishing
> > init_module() depends on when the RTthread gives up CPU.
> > Regards, pa
>
> Yes, as I said, I agree in theory. But I just tried switching it around in
> some code of mine so that I call pthread_setfp_np just before I call
> pthread_create, and I get a seg fault, my thread doesn't work, and it
> can't be remove. I'm about to reboot to get rid of it.
>
> Setup the other way (ie. with pthread_setfp_np just after pthread_create)
> my periodic thread runs fine, correctly calling some >100 floating point
> functions from math.h every 100 micro seconds. [For those concerned, the
> seg fault occurred when I was running a scaled down code, calling only
> 10 fp math.h fxns each 200 micro seconds, - a very minimal load thread.]
>
> So why does it work when I do it wrong, but not when I do it right?
> Anyone? (dmesg output below for those who can read it)
BTW, I've never recommended to call pthread_setfp_np before or after
pthread_create() (in init_module()). I've recommended: "Try to put
your pthread_setfp_np call as the first statement in your RTthread."
Maybe it's time for a word from RTL gurus.
Regards,
pa
--
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Pavel Andris | tel: +421 7 5941 2167
Institute of Control Theory and Robotics | fax: +421 7 5477 6045
Slovak Academy of Sciences |
Dubravska cesta 9 | e-mail: [EMAIL PROTECTED]
SK - 842 37 Bratislava |
Slovakia |
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