instruction pipeline

GENERAL CONCEPTS

Pipelining refers to the technique in which a given task is divided into a number of subtasks that need to be performed in sequence. Each subtask is performed by a given functional unit. The units are connected in a serial fashion and all of them operate simultaneously(في نفس الوقت).

The use of pipelining improves the performance compared to the traditional sequential execution of tasks.

Pipeline Classification
There are two areas of computer design where the pipeline organization is applicable.
1- Instruction pipeline which is explained in the previous lecture and the beginning of this lecture.
2- Arithmetic pipeline which divides an arithmetic operation into sub-operations for execution in the pipeline segments


Pipeline and sequential instructions

Important Laws
1- No. of clock cycle time= n+m-1
where :
n: No. of tasks.
m: No. of segments.

2- Total time with pipeline = No. of clock cycle time ? tp
= (n+m-1) ? tp
where tp : time of the segment.