A pipeline (pipeline(a)) has initially seven segments as listed in Table1.1. It is compared to three other pipelines; Pipeline(b), Pipeline(c) and Pipeline(d). Find each pipeline clock cycle time in nano seconds, the total executing time for the indicated n tasks and the speed up ratio; (nk)/(n+k-1). Name Segment1 Segment2 Segment3 Segment4 Segment5 Segment6 Segment7
t t1 t2 t3 t4 t5 t6 t7
time in ns 135 115 155 225 95 75 40
tasks n 315
a- Pipeline(a) uses the original five segments as shown in Table
b- Pipeline(b) is the same as pipeline (a) with t4, split into 3 identical segments.
C- Pipeline(c) is the same as pipeline (a) with t2 and t3, combined into one segment
d- Pipeline(d) is the same as pipeline (a) with t4, split into 3 identical segments while t2, and t3 are combined into one segment.