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Lecture Notes for CSCI 3753 - OPERATING SYSTEMS with Mishra at Colorado (CU)

Notes Information

Material Type:Class Note
Professor:Mishra
Class:CSCI 3753 - OPERATING SYSTEMS
Subject:Computer Science
University:University of Colorado - Boulder
Term:--
Keywords:
  • Internal Fragmentation
  • External Fragmentation
  • Inexpensive
  • Process Address Space
  • Downward Move
  • Complicated
  • Hierarchies
  • Utilization
  • Environment
  • Contemporary
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CSCI 3753 Operating Systems Memory Management Lecture Notes By Shivakant Mishra Computer Science, CU-Boulder Last Update: 03/09/06 Introduction . Memory is an important shared resource in a computing systems - Shared among all processes - Used by processes to store their state (code, heap, stack) - Used for execution of processes (CPU registers, .) - Can be used for interprocess communication and synchronization - Store information that can outlive the lifetime of a process Memory Manager . Memory allocation and deallocation - Static allocation - Dynamic allocation . Memory protection - Address space The External View of the Memory Manager Application Program Application Program VMQuery() VirtualFree() VirtualLock() ZeroMemory() VirtualAlloc() sbrk() exec() getrlimit() shmalloc() System Calls File Mgr Device Mgr Memory Mgr Process Mgr UNIX File Mgr Device Mgr Memory Mgr Process Mgr Windows Hardware Memory manager functions . Requirements - Minimize execu...

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