Notes: Operative Systems – Part 6

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NOTIFICATION: These notes are published for educational purposes. Using these notes is under your own responsibility and risk. These notes are given ‘as is’. I do not take responsibilities for how you use them.

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  • Least recently used  (LRU) page replacement algorithm
  • Not frequenty used (NFU) algorithm
  • Aging (approximation of LRU) algorithm
  • Working set
  • Current virtual time
  • Page replacement algorithm
  • Clock page replacement algorithm
  • WSClock page replacement algorithm
  • Local vs. Global replacement policies
  • Internal vs. External fragmentation
  • Page size
  • Periodic cleaning policy
  • Thrashing
  • Separation of policy and mechanism
  • Concurrency vs. parallelism
  • Critical sections

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Notes: Operative Systems – Part 3

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NOTIFICATION: These notes are published for educational purposes. Using these notes is under your own responsibility and risk. These notes are given ‘as is’. I do not take responsibilities for how you use them.

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  • System call operation (syscall)
  • Intermediate Library
  • Implementing system calls
  • Kernel modules
  • SysEnter/SysExit method
  • Phony
  • Kernel modules
  • Module control
  • Generic module
  • Device classification
  • Character devices
  • Block devices
  • Network devices
  • Concurrency issues
  • Version numbering
  • GNU General Public Licence (GPL)
  • Memory management
  • Multiprogramming
  • Fixed partition
  • Relocation and protection

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