today's lecture: pipelining

previously we've learned how microprocessors work.

modern microprocessors are pipelined


without pipelining, different parts of the CPU are accessed during each of these, e.g. during the fetch, the ALU is not in use:

instruction fetch
decode (sets up input registers)

memory access
register write (writeback output)

we can increase the utilization of silicon by overlapping some instructions with pipelining.