Hi, 2009/9/29 Azraiyl <azraiyl@xxxxxxxxx>: > Thanks for your details. My problem is that my problem can be simplified as > follows: Toggle an IO with 4 KHz. I don't have an external 4 KHz clock, Maybe a stupid question: Why not use a programmable clock output? Or a timer/counter peripheral inside the SoC to generate the 4KHz interrupt. Using the timer framework for a 4KHz interrupt source is way too heavy for this processor related to the overhead the timer interrupt introduces inside the system. Look at the CPU-load this is generating... High latencies would not surprise me since it is likely that the processor just cannot keep up... Better use the TC-library to generate a dedicated interrupt if you want some realtime responsiveness and somewhat reasonable CPU-load. Personally I would not go beyond the 1kHz boundary with this processor... Remy -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
