single.dvi 17 Free-Space Management In this chapter, we take a small detour from our discussion of virtual- izing memory to discuss a fundamental aspect of any memory manage- ment system, whether it be a malloc library (managing pages of a pro- cess’s heap) or the OS itself (managing portions of the address space of a […]
single.dvi 26 Concurrency: An Introduction Thus far, we have seen the development of the basic abstractions that the OS performs. We have seen how to take a single physical CPU and turn it into multiple virtual CPUs, thus enabling the illusion of multiple pro- grams running at the same time. We have also seen how
The Australian National University Mid Semester Examination – April 2019 Comp2300 & Comp6300 Computer Organisation & Program Execution Study period: 15 minutes Time allowed: 1.5 hours (after study period) Total marks: 50 Permitted materials: None Questions are not equally weighted – sizes of answer boxes do not nec- essarily relate to the number of marks
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single.dvi 37 Hard Disk Drives The last chapter introduced the general concept of an I/O device and showed you how the OS might interact with such a beast. In this chapter, we dive into more detail about one device in particular: the hard disk drive. These drives have been the main form of persistent data
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single.dvi 55 Access Control Chapter by Peter Reiher (UCLA) 55.1 Introduction So we know what our security goals are, we have at least a general sense of the security policies we’d like to enforce, and we have some ev- idence about who is requesting various system services that might (or might not) violate our policies.
CS 111: Operating System Principles Lab 3 Hash Hash Hash 1.0.3 Jon Eyolfson May 10, 2021 Due: May 21, 2021 at 8 PM PST In this lab you’ll be making a hash table implementation safe to use concurrently. You’ll be given a serial hash table im- plementation, and two additional hash table implementations to modify.
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single.dvi 56 Protecting Information With Cryptography Chapter by Peter Reiher (UCLA) 56.1 Introduction In previous chapters, we’ve discussed clarifying your security goals, determining your security policies, using authentication mechanisms to identify principals, and using access control mechanisms to enforce poli- cies concerning which principals can access which computer resources in which ways. While we identified
single.dvi 21 Beyond Physical Memory: Mechanisms Thus far, we’ve assumed that an address space is unrealistically small and fits into physical memory. In fact, we’ve been assuming that every address space of every running process fits into memory. We will now relax these big assumptions, and assume that we wish to support many concurrently-running large
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single.dvi 7 Scheduling: Introduction By now low-level mechanisms of running processes (e.g., context switch- ing) should be clear; if they are not, go back a chapter or two, and read the description of how that stuff works again. However, we have yet to un- derstand the high-level policies that an OS scheduler employs. We will
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single.dvi 16 Segmentation So far we have been putting the entire address space of each process in memory. With the base and bounds registers, the OS can easily relocate processes to different parts of physical memory. However, you might have noticed something interesting about these address spaces of ours: there is a big chunk of
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