Kernel preemption

[mats.lindberg at se.transport.bombardier.com]

I've compiled the kernel with 
options PREEMTION

I've tried rtprio
I've tried sched_setscheduler(...scheduler=FIFO, priority=31...);
Swapping is turned off.

I still get 250ms pausing in the tcp comm. Maybe it is the stack?! Is it 
losing frames perhaps? Any good ideas what to look for - someone.

Regarding the HZ - My application never uses the cpu  for more than 1ms or 
so before it blocks. So that should not be tha case.
There are not many other processes and I have none of them running at an 
elevated priority/scheduler scheme.


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