{HEAD ~ Each node} of {TAIL ~ the queue} holds a reference to a task that may be concurrently performed by multiple thread execution units, but each on a different subset of data 
of
{ HEAD ~ Each node } of { TAIL ~ the queue } holds a reference to a task that may be concurrently performed by multiple thread execution units , but each on a different subset of data
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