Pipelining

Question 14

A non pipelined single cycle processor operating at 100 MHz is converted into a synchronous pipelined processor with five stages requiring 2.5 nsec, 1.5 nsec, 2 nsec, 1.5 nsec and 2.5 nsec, respectively. The delay of the latches is 0.5 nsec. The speedup of the pipeline processor for a large number of instructions is

A	4.5
B	4.0
C	3.33
D	3.0

Computer-OrganizationPipeliningGATE 2008-IT

Question 14 Explanation:

For non-pipelined system time required = 2.5 + 1.5 + 2.0 + 1.5 + 2.5 = 10
For pipelined system = Max(stage delay) + Max(latch delay) = 2.5 + 0.5 = 3.0
Speedup = Time in non-pipelined system/Time in pipelined system = 10/3 = 3.33

Correct Answer: C

Question 14 Explanation:

For non-pipelined system time required = 2.5 + 1.5 + 2.0 + 1.5 + 2.5 = 10
For pipelined system = Max(stage delay) + Max(latch delay) = 2.5 + 0.5 = 3.0
Speedup = Time in non-pipelined system/Time in pipelined system = 10/3 = 3.33

Pipelining

Pipelining

Pipelining

Pipelining

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