single.dvi 32 Common Concurrency Problems Researchers have spent a great deal of time and effort looking into con- currency bugs over many years. Much of the early work focused on deadlock, a topic which we’ve touched on in the past chapters but will now dive into deeply [C+71]. More recent work focuses on studying other […]
COPE-05 Asynchronism.indd 5 Asynchronism Uwe R. Zimmer – The Australian National University Computer Organisation & Program Execution 2021 Asynchronism © 2021 Uwe R. Zimmer, The Australian National University page 255 of 487 (chapter 5: “Asynchronism” up to page 340) References for this chapter [Patterson17] David A. Patterson & John L. Hennessy Computer Organization and Design
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single.dvi 31 Semaphores As we know now, one needs both locks and condition variables to solve a broad range of relevant and interesting concurrency problems. One of the first people to realize this years ago was Edsger Dijkstra (though it is hard to know the exact history [GR92]), known among other things for his famous
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single.dvi 28 Locks From the introduction to concurrency, we saw one of the fundamental problems in concurrent programming: we would like to execute a series of instructions atomically, but due to the presence of interrupts on a single processor (or multiple threads executing on multiple processors concur- rently), we couldn’t. In this chapter, we thus
single.dvi 2 Introduction to Operating Systems If you are taking an undergraduate operating systems course, you should already have some idea of what a computer program does when it runs. If not, this book (and the corresponding course) is going to be difficult — so you should probably stop reading this book, or run to
single.dvi 29 Lock-based Concurrent Data Structures Before moving beyond locks, we’ll first describe how to use locks in some common data structures. Adding locks to a data structure to make it us- able by threads makes the structure thread safe. Of course, exactly how such locks are added determines both the correctness and performance of
single.dvi D Monitors (Deprecated) Around the time concurrent programming was becoming a big deal, object- oriented programming was also gaining ground. Not surprisingly, peo- ple started to think about ways to merge synchronization into a more structured programming environment. One such approach that emerged was the monitor. First described by Per Brinch Hansen [BH73] and
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book Contents To Everyone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii To Educators . . . . . . . . . . . . . . . . . .
book Preface To Everyone Welcome to this book! We hope you’ll enjoy reading it as much as we enjoyed writing it. The book is called Operating Systems: Three Easy Pieces (available at http://www.ostep.org), and the title is obviously an homage to one of the greatest sets of lecture notes ever created, by one Richard Feynman
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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