I've tried to toggle a GPIO from the userspace using both /dev/mem with mmap and /sys/class/gpio/. The toggle time is catastrophic: 230 us. I would like to improve this and I am wondering if a RTOS would help. Xenomai and RTAI are provided on the buildroot distribution but they are only available for kernel 2.6.
Is it possible to install a RTlinux on the SC589?