Have code that moves data from a known area in one address space to a 
corresponding area in another address space.  This code executes multiple times 
per second.  Code uses AR's and a MovePage instruction to get the data from one 
to the other, one page at a time.  Since I know the real address location of 
the source and target of the move, I'm wondering how much overhead would be 
saved by doing this using real addresses as opposed to virtual, and using one 
MVCL instruction.  Anyone have any history with this?    

    --Dave

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