Architecture of ARM Microcontroller (Part II) 印度理工学院公开课-基于ARM的嵌入式系统设计

Concepts Covered

• Basic concepts of pipeline processing

• Pipeline speedup

• Instruction pipeline in ARM

 

Basic concepts of pipeline processing

　　What is pipelining?

　　   　　A mechanism for overlapped execution of several input sets by partitioning some

　　　computation into a set of k sub-computations(or stages).

　　Where are pipelining used in a computer system?

　　　　Instruction execution

　　　　Arithmetic computation

　　　　Memory access

　　A Real-life Example

 

              

　　Extending the Concept to processor pipeline

　　　　We need buffering

　　Speedup and Efficiency

　　　　

 

 　　　   

 

　　　　 

 

　　　　   never be 100%.

 

 　　Note: If I have a k-stage pipeline, I can expect a k times speedup

 

 　　　　

　

Pipeline speedup

Instruction pipeline in ARM