{HEAD ~ The snooping protocol} utilizes {TAIL ~ the duality} of directories coupled with the non atomicity of directory updates to maximize processor cache availability and minimize processor cache access times thus supporting high performance architectures 
utilizes
{ HEAD ~ The snooping protocol } utilizes { TAIL ~ the duality } of directories coupled with the non atomicity of directory updates to maximize processor cache availability and minimize processor cache access times thus supporting high performance architectures
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH