Hi,
I use the MPC5676R controller with iSYSTEM debugger and GNU compiler. Both cores have separate timer interrupts. For core0 an eMIOS counter is used (every 100μs, priority 10) and for core 1 an RTI interrupt (every 30μs, priority 15).
While the interrupt on Core 0 is running normally, the interruption time is sporadically increased in the core1. The duration of the interrupt routine then extends from approximately 3.5μs to over 35μs for the same number of instructions. It seems as if only the interrupt routine is extended, not the routines in the main loop.
What else can be the reason that the interrupt timing in core 1 slows down?