i want to move data into a BBB - a great deal of data

on the order of 10Mbytes per sec (5-15 actually...)   & up to 1/2 a gig or 
more at a time 
a sustained rate, periodic & continuous 

the arriving data is externally buffered & can be triggered at any size 
chunk up to 8k and 20ns read access
(this part is complete) 

soo...
which is the better choice ?  pru, ping pong'd to ddr  or gpmc, dma'd to 
ddr ??


the data would eventually be moved to a usb drive after collection
  (not during - unless i can be assured it wouldn't slow collection down...)
  

  seeking opinions ... 

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