Operating Systems
Memory Management Simulator
Learn how Operating Systems manage memory using page replacement algorithms like FIFO, LRU and Optimal with real-time simulation.
Virtual Memory Lab
Visualize page loading, replacement and page fault behavior.
FIFO
First In First Out removes the oldest page from memory.
LRU
Least Recently Used replaces the least recently accessed page.
Optimal
Replaces the page that will not be used for the longest time.
Page Fault
Happens when a page is not available in memory frames.
Simulation Controls
Example: 7 0 1 2 0 3 0 4 2 3 0 3 2
Page Replacement Visualization
| Step | Page | Frames | Status |
|---|---|---|---|
| 1 | 7 | 7 - - | Page Fault |
| 2 | 0 | 7 0 - | Page Fault |
| 3 | 1 | 7 0 1 | Page Fault |
| 4 | 2 | 0 1 2 | Page Fault |
| 5 | 0 | 0 1 2 | Page Hit |
| 6 | 3 | 1 2 3 | Page Fault |
| 7 | 0 | 2 3 0 | Page Fault |
| 8 | 4 | 3 0 4 | Page Fault |
| 9 | 2 | 0 4 2 | Page Fault |
| 10 | 3 | 4 2 3 | Page Fault |
| 11 | 0 | 2 3 0 | Page Fault |
| 12 | 3 | 2 3 0 | Page Hit |
| 13 | 2 | 2 3 0 | Page Hit |
Total Page Faults
10
Total Hits
3
Hit Rate
23.1%
How Memory Management Works
Memory Management is responsible for allocating and managing RAM efficiently between processes.
When memory becomes full, the Operating System uses page replacement algorithms to decide which page should be removed.
Page replacement algorithms help improve system performance by minimizing page faults and maximizing page hits.