Hi all,
I have a strange scheduling problem. Let's say I have two (RTL-) threads, A and B,
which interact in the following way - B, which has higher priority, calls sem_wait on
a semaphore. Whenever A has one piece of data ready for B, A calls sem_post on the
same semaphore.
For whatever reason, when running this example A runs one cycle and so does B. But
when I insert another module, being another RTLinux program, whenever usleep() is
called from there, both A and B runs another cycle!
Both A and B are periodic processes with the same periodicity, but only A make calls
to pthread_make_periodic_np and pthread_wait_np since B waits for the semaphore and
has higher priority than A.
Any thought appreciated!
Regards,
Jonas
______________________________________________________________________
Jonas Persson E-mail: [EMAIL PROTECTED]
Project Manager, M.Sc C.Sc&E http://www.comsys.se/
Comsys AB Phone: +46-(0)46-286 3051
Forskningsbyn IDEON Fax: +46-(0)46-286 3505
S-223 70 Lund, Sweden
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