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Virtual Memory Systems in Operating Systems

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Explore virtual vs. physical address space allocation. Understand frame recovery, copying to HDD, MOVE.REG operation. Memory mapping in MMU.

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Virtual Memory Systems in Operating Systems

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Presentation Transcript

  1. Memória Virtual Sistemas OperacionaisEscola Politécnica – PUCPR Prof. Luiz Lima

  2. Espaço deendereçamento virtual Espaço deendereçamento físico menos usada 0 4K 8K 12K 16K 20K 24K 28K 32K 36K 40K 44K 48K 52K 56K 60K 64K 0 4K 8K 12K 16K 20K 24K 28K 32K 2 0 0 5 1 - - 2 0 0 3 3 3 3 - 4 3 5 6 6 page frame - 7 1 - recuperapágina 2 copia p/ HD - 7 - 4 - página - MOVE REG, 10K MOVE REG, 15K MOVE REG, 3K HD

  3. Espaço deendereçamento virtual Espaço deendereçamento físico 0 4K 8K 12K 16K 20K 24K 28K 32K 36K 40K 44K 48K 52K 56K 60K 64K 0 4K 8K 12K 16K 20K 24K 28K 32K 2 0 5 1 3 2 0 3 - 4 - 5 6 6 - 7 1 - - 7 - 4 - - MOVE REG, 10K 3 3 HD MOVE REG, 14K

  4. Mapeamento na MMU

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