(Electronics & Computer Science / Computer Science) a technique whereby computer peripherals may be addressed as though they formed part of the main memory of the computer.
(Khanu Piyar)
consider a RAM of 64 words with a size of 16 bits.Assume that this memory have a cache memory of 8 Blocks with block size of 32 bits.Draw a diagram to show the address mapping of RAM and Cache, if 4-way set associative memory scheme is used.
Direct mappingA given Main Memory block can be mapped to one and only one Cache Memory line.It is Simple, Inexpensive, fastIt lacks mapping flexibilityAssociative mappingA block in the Main Memory can be mapped to any line in the Cache Memory available (not already occupied)It is slow, expensiveIt has mapping flexibility
memory mapping
The differences among direct mapping and set-associative mapping :Direct mapping : Each line in main memory maps onto a single cache line.Set-associative : Each line in main memory maps onto a small (collection) set of cache line.Direct mapping : A memory block is mapped into a unique cache line, depending on the memory address of the respective block.Set-associative : A memory block is mapped into any of the line of a set. The set is determined by the memory address, but the line inside the set can be any one.dont knowyet
The differences among direct mapping and set-associative mapping :Direct mapping : Each line in main memory maps onto a single cache line.Set-associative : Each line in main memory maps onto a small (collection) set of cache line.Direct mapping : A memory block is mapped into a unique cache line, depending on the memory address of the respective block.Set-associative : A memory block is mapped into any of the line of a set. The set is determined by the memory address, but the line inside the set can be any one.dont knowyet
memory mapping
paging
it ia html
Runtime memory mapping pertains to any given geographical?æinformation that is not officially stored memory. It is quite similar to real time in that it is the here and now status. Often times it is fed from satellite.?æ
A 14 bit address can specify 214 or 16,384 different locations.
Its simply done. By connecting many lines :p
Paging is a memory management scheme that eliminates the need for contiguous allocation of physical memory, thus preventing fragmentation. It divides the virtual memory into fixed-size blocks called pages and the physical memory into frames of the same size. When a process is executed, its pages are loaded into any available frames in physical memory, allowing for efficient use of memory and easier process management. This system also utilizes a page table to keep track of the mapping between virtual pages and physical frames.