Hi,
we have an application running on C67 with a few BIOS threads. We have recently came into a strange issue with preemption.
In a few words there are two threads - one with priority 6, another with priority 12. The higher priority thread does some actions periodically using TSK_sleep(5). And we can see that it comes to action roughly every 5 ms. But then, at some point the lower priority thread needs to perform another action that in total takes around 60 ms. I would expect that when it comes to action it will be preempted every 5 ms by a higher priority thread. The problem is it does not happen. The higher priority thread does not get processor's time until lower priority thread finishes. There are no synchronization mechanisms used - just TSK_sleep in higher priority thread.
The work to do in lower priority thread was changed to a simple while loop where we check one of the counters to see if 60 ms already passed. It changed nothing.
We also tried to call TSK_enable just before the loop in case by some mistake TSK_disable was called - it changed nothing.
Interrupts are not disabled.
Any ideas what might be wrong or what else we could check?
Thanks in advance,
Wojtek
