Execution of a process os brings into main memory a few pieces of the program Resident set: portion of process that is in main memory EXecution proceeds smoothly as long as all memory references are to locations that are in the resident set An interrupt(memory access fault is generated when an address is needed that is not in main memor4 Execution of a Process • OS brings into main memory a few pieces of the program – Resident set: portion of process that is in main memory • Execution proceeds smoothly as long as all memory references are to locations that are in the resident set • An interrupt (memory access fault) is generated when an address is needed that is not in main memory