Methods, systems, and mediums are described for scheduling data parallel tasks onto {HEAD ~ multiple thread execution units} of {TAIL ~ processing system} 
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Methods , systems , and mediums are described for scheduling data parallel tasks onto { HEAD ~ multiple thread execution units } of { TAIL ~ processing system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL