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Memory, Paging, . (.), OS (Main Memory, Secondary Memory), PAGE TABLE,…
Memory
Secondary memory
Non-volatile
High storage capacity
Low access speed
Types
SSD
HDD
Durable and mobility
Cache
Memory
L2
L3
L1
Temporarily stores frequently accessed data
Primary Memory
Ram
DRAM
SRAM
ROM
Paging
Mapping Virtual Address to Physical Address
Virtual address
The Virtual address is generated by CPU
PAge offset
PAGE NO
Each virtual address is relatived with Physical address
Page Table
Page NO
The page number
Frame NO
The frame number
Physical Address
Frame NO
Page offset
Generated by MMU
Paging Replacement Algorithms
FIFO
Pages are replaced page in front of the queue is selected for removal
LRU
Replace page has not been referenced for the longest time
Optimal Page Replacement
Pages are replaced which aren't used for the longest duration of time in future
Definition
Process that computer store & retrieve data from 2nd memory for use in main memory
Virtual memory
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OS
Main Memory
Frame 1
Frame 2
Frame 3
Page 3
page 2
Page 1
Secondary Memory
PAGE
PAGE
PAGE
PAGE TABLE
P|D
CPU
F|D
Speed
▲
Size
▼
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CPU
F1