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The actual physical layout is controlled by the process's page table. Figure 9.2 shows virtual address space, which is the programmers logical view of process memory storage.Figure 9.1 shows the general layout of virtual memory, which can be much larger than physical memory:ДЇigure 9.1 - Diagram showing virtual memory that is larger than physical memory.Less I/O is needed for swapping processes in and out of RAM, speeding things up.Because each process is only using a fraction of their total address space, there is more memory left for other programs, improving CPU utilization and system throughput.Programs could be written for a much larger address space ( virtual memory space ) than physically exists on the computer.The ability to load only the portions of processes that were actually needed ( and only when they were needed ) has several benefits:.Certain features of certain programs are rarely used, such as the routine to balance the federal budget.Arrays are often over-sized for worst-case scenarios, and only a small fraction of the arrays are actually used in practice.

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Error handling code is not needed unless that specific error occurs, some of which are quite rare.

In practice, most real processes do not need all their pages, or at least not all at once, for several reasons:.

However the entire process still had to be stored in memory somewhere.

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Preceding sections talked about how to avoid memory fragmentation by breaking process memory requirements down into smaller bites ( pages ), and storing the pages non-contiguously in memory.

Abraham Silberschatz, Greg Gagne, and Peter Baer Galvin, 'Operating System Concepts, Ninth Edition ', Chapter 9.

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If you can correct this code, either upload it to your own Largely on the fly, making for non-semantic and dirty code in many Needs it, just remember to credit it to verandaguy.Дerivative works: I'm a self-taught LaTeX-er, on top of which my markup is done Or without notice upon request to do so by the University of Removal policy: these notes may be subject to removal with short Ownership: These course notes were produced by the GitHub userД¬ontain contents of slides, presentations, and other media created Purpose: These notes are uploaded to this repository with theД®xclusive intent of helping out sick or otherwise absent students,ДЄnd not to undermine, in any way, the integrity of the courses in I'll try to keep them as consistent as possible. These examples are all on the course website, inД¬ommits and pushes can't be handled by cron because of a permissions No way I could draw TikZ fast enough to keep up with the rate at which In MAT 1320, some of the examples are omitted. More than 48 hours, the uploaded slides most likely don't contain thatДЇragment, and that should be marked as an issue. Lecture slides online if an INCOMPLETE is left on a document for Stuck putting an ampersand in a bmatrix, or was doing something else Passages where either the prof changed slides too quickly, or I was Occasionally, you may notice ' INCOMPLETE' in all-caps. Government (which I sincerely hope will be sooner than later). PDFs of books required for courses, at least, until Plus, somethingДЄssignments, for reasons similar to those listed above. Likely vary between groups, semesters, and years. DGDs cover mostly practice exercises, and these most These can be found in the same file as the sourceДGD content. Your correction will beДЄrchived, and you will be credited in this readme upon the next pull They're missing only very small bits and pieces. Some of these are incomplete, but generally, Source LaTeX files for the course notes in the core uOttawa CS Course notes for the uOttawa CS specialization program marked up in LaTeX with exported PDFs and graphic assets.

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