OPERATING SYSTEMS MEMORY MANAGEMENT - WPI

8: MEMORY Management1 Jerry BreecherOPERATING SYSTEMS MEMORY MANAGEMENT8: MEMORY Management2 What Is In This Chapter?Just as processes share the CPU, they also share physical MEMORY . This chapter is about mechanisms for doing that SYSTEM MEMORY Management8: MEMORY Management3 MEMORY MANAGEMENTJust as processes share the CPU, they also share physical MEMORY . This section is about mechanisms for doing that OF MEMORY USAGE:Calculation of an effective address Fetch from instruction Use index offsetExample: ( Here index is a pointer to an address )loop:load register, indexadd 42, registerstore register, indexinc indexskip_equal index, final_addressbranch continue.

8: Memory Management 21 Address Translation Scheme Address generated by the CPU is divided into: • Page number (p) – used as an index into a page table which contains base address of each page in physical memory. • Page offset (d) – combined with base address to define the physical memory address that is sent to the memory unit.

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  Memory, Translation, Address, Address translation, Memory address

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