Operating System Concepts Essentials by Silberschatz, Abraham, Galvin, Peter B., Gagne, Greg (2013) Paperback

Operating System Concepts Essentials by Silberschatz, Abraham, Galvin, Peter B., Gagne, Greg (2013) Paperback

Language: English

Pages: 760


Format: PDF / Kindle (mobi) / ePub

Commercial Data Mining

Introduction to the Theory of Computation (2nd Edition)




















open-source their code, but Red Hat and a myriad of other companies are doing just that and showing that commercial companies benefit, rather than suffer, when they open-source their code. Revenue can be generated through support contracts and the sale of hardware on which the software runs, for example. 1.12.1 History In the early days of modern computing (that is, the 1950s), a great deal of software was available in open-source format. The original hackers (computer enthusiasts) at MIT’s

adopted this text for their operating-system class. To obtain these restricted supplements, contact your local John Wiley & Sons sales representative. You can find your Wiley representative by going to http://www.wiley.com/college and clicking “Who’s my rep?” Notes to Students We encourage you to take advantage of the review questions (available online) and practice exercises that appear at the end of each chapter. The review questions as well as solutions to the practice exercises are available

another process’s memory. Shared memory requires that two or more processes agree to remove this restriction. They can then exchange information by reading and writing data in the shared areas. The form of the data is determined by the processes and is not under the operating system’s control. The processes are also responsible for ensuring that they are not writing to the same location simultaneously. Such mechanisms are discussed in Chapter 5. In Chapter 4, we look at a variation of the process

structures. Several UNIX systems—including Mach—are treated in detail in [Vahalia (1996)]. Mac OS X is presented at http://www.apple.com/macosx and in [Singh (2007)]. Solaris is fully described in [McDougall and Mauro (2007)]. DTrace is discussed in [Gregg and Mauro (2011)]. The DTrace source code is available at http://src.opensolaris.org/source/. 102 Chapter 2 Operating-System Structures Bibliography [Brinch-Hansen (1970)] P. Brinch-Hansen, “The Nucleus of a Multiprogramming System”,

effect of this design on concurrency. Whereas the manyto-one model allows the developer to create as many user threads as she wishes, it does not result in true concurrency, because the kernel can schedule only one thread at a time. The one-to-one model allows greater concurrency, but the developer has to be careful not to create too many threads within an application (and in some instances may be limited in the number of threads she can user thread k k k kernel thread Figure 4.7

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