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Timer resolution


If I might intrude for a moment with a simple user question; does 
anyone know where or how I might discover the timer tick interval 
limits for using the RTEMS network stack: i.e how often should 
rtems_clock_tick() be called? I ask because it must have a bearing on 
how well the TCP retransmit timers, etc will work, and I suspect there 
is a minimum resolution requirement for 10Mbit and 100Mbit Ethernet...

Thanks for any assistance,


"The Galaxy's a fun place. You'll need to have this fish in your ear."