paging

  • memory mgmt in OS
  • logical address vs. physical address
  • page vs. frame
    • program divided into pages
    • physical mem divided into frame
    • page – frame mapping table
    • page
      • memory page, or virtual page is a fixed-length contiguous block of virtual memory, described by a single entry in the page table. It is the smallest unit of data for memory management in a virtual memory operating system.
    • frame
      • page frame is the smallest fixed-length contiguous block of physical memory into which memory pages are mapped by the operating system
  • page size?
    • depends on the processor
    • may be dynamic
  • how many pages are loaded?
    • page fault
      • trigger os to load the info from disk to page/frame
  • physical address within frame is continuous?
    • yes
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