'Waiting processes' presentation slideshows

Operating Systems

Operating Systems. Certificate Program in Software Development CSE-TC and CSIM, AIT September -- November, 2003. Objectives describe the synchronization problem and some common mechanisms for solving it. 5. Process Synchronization (Ch. 6, S&G). ch 7 in the 6th ed. Contents.

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Synchronization

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Synchronization

Synchronization. Shared Memory T hread S ynchronization. Threads cooperate in multithreaded environments User threads and kernel threads Share resources and data structures E.g. memory cache in a web server Coordinate execution Producer/consumer model

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Homework Solutions

Homework Solutions. 5.12, 5.14, 5.15, 5.16, 5.17, 5.20. Problem 5.12. Define a procedure similar to those in Figure 5.2, that uses the test_and_set instruction. Note the procedure in Figure 5.2a uses the Compare and Swap instruction and those in Figure 5.2b uses the exchange instruction.

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1.8 Semaphore Statement

1.8 Semaphore Statement. One of the main problems in coordinating parallel processes is the management of access to shared resources . Mechanisms Grouped statements (1.7) Semaphore statement (1.8) Region statement (1.9).

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Class Discussion

Class Discussion. Questions. Why does concurrency make it much more difficult to reason about the correctness of programs (compared to sequential execution)? Why not just have sequential programming? Is concurrency becoming more or less relevant?. Questions.

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