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Question: In this phase we will add the Memory Management layer to our toy OS. We will implement demand-paging. Set page size to 8 words, therefore there are 32 frames in our 256 word memory. Each entry in page table consists of the frame number, the valid/invalid-bit, and the modify-bit. We will use two page replacement algorithms, FIFO and LRU. When a page-fault occurs, the offending process is placed in the wait queue with the trap completion time set to 27 clock ticks later--same as I/O operations. After a page fault is serviced, that is 27 or more clock ticks have passed, the process is moved to ready queue. Once a page-fault occurs, you may load the new page into memory immediately. This way when page-fault has been serviced (its time is reached or has passed) the page is already in memory.
All requirements of this assignment is in this website
All OS we already have
The total length of the encoding with the above frequencies and the derived Huffman tree is:
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