Hi Sebastian, the SAMA5D3 Xplained board lacks a high-resolution sched_clock. After applying this patch sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836480000000ns is followed by sched_clock: 32 bits at 16MHz, resolution 60ns, wraps every 260301047747ns Thanks, -Carsten. -- 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