Hi!
Does there exist a kernel road map for the carambola board?
The reason why I'm asking is because it would be great to get a kernel that is suitable for real time kernel preemption that provides very low latencies / high determinism. This is essential for many kind of machine control and data acquisition applications. The current 3.3.8 kernel is not supported by the real time kernel preemption - some 3.2.x and 3.4.x are supported but not 3.3.x. Please check
http://www.kernel.org/pub/linux/kernel/projects/rt/ for available patches.
I have attached a simple jitter test application. It runs for five seconds and logs the jitter. With the 3.3.8 kernel, when the board is idle, then the 95% of the time, the jitter is below 30µs and the worst case is around 80µs. When the carambola is under some load (i.e. ping-flood: ping -f -s 1000 <ipaddr>), then 95% of the time, the jitter is below 140µs and the worst case is around 600µs. A jitter below 1ms is good enough for certain real time application, but not good for what I'm planning to do
regards
Bernhard