Transcription of Chapter 8: Memory Management
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Chapter 8: Memory Management
The image cannot be displayed. Your computer may not have enough Memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it 8: Memory Management ! !Silberschatz, Galvin and Gagne 2005!Operating System Concepts! Chapter 8: Memory Management ! Background" Swapping " Contiguous Allocation" Paging" Segmentation" Segmentation with Paging" !Silberschatz, Galvin and Gagne 2005!Operating System Concepts!Background! Program must be brought into Memory and placed within a process for it to be run"" Input queue or job queue collection of processes on the disk that are waiting to be brought into Memory to run the program"" User programs go through several steps before being run" !
Fragmentation! External Fragmentation – Gaps between allocated contiguous memory - total memory space exists to satisfy a request, but it is not contiguous" Internal Fragmentation – allocated memory may be slightly larger than requested memory; this size difference is memory internal to a partition, but not being used"
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