in {TAIL ~ a third cycle}, {HEAD ~ old data} are written back into the DRAM memory, and new data from the DRAM memory are transferred into the cache memory to replace old data 
in
in { TAIL ~ a third cycle } , { HEAD ~ old data } are written back into the DRAM memory , and new data from the DRAM memory are transferred into the cache memory to replace old data
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD 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