PPT-Operating Systems , 132 Synchronization, Part 2

Semaphores Semaphores E nable simple synchronization An interface of atomic functions supplying mutual exclusion Programmers dont need to bother with synchronization algorithms Cou nting s. 1. 10. File Systems. 10.1 Basic Functions of File Management. 10.2 Hierarchical Model of a File System . 10.3 User’s View of Files. Logical File Organization. Operations on Files. 10.4 . File Directories. 3.1 Shared Memory Methods . Monitors . Protected Types. 3.2 Distributed Synchronization/Comm.. Message-Based Communication . Procedure-Based Communication . Distributed Mutual Exclusion. 3.3 Other Classical Problems. 1. 6. Deadlocks. 6.1 Deadlocks with Reusable and Consumable. . Resources. 6.2 Approaches to the Deadlock Problem . 6.3 A System Model . Resource Graphs . State Transitions. Deadlock States and Safe States . 1. Hugh C. Lauer. Xerox Corporation. Palo Alto, Californi. a. Roger M. Needham. Cambridge University. Cambridge, England. Proc. Second International Symposium on Operating Systems, IRIA, Oct. 1978. and more…. 1. Operating Systems, 2011, Danny Hendler & Amnon Meisels. What’s wrong with busy waiting?. Doesn‘t make sense for . Uni. -processor. Wastes CPU time. May cause priority inversion and deadlock. 1. 8. Virtual Memory. 8.1 Principles of Virtual Memory . 8.2 Implementations of Virtual Memory . Paging. Segmentation. Paging With Segmentation. Paging of System Tables. Translation Look-aside Buffers . David Ferry, Chris Gill. CSE 522S - Advanced Operating Systems. Washington University in St. Louis. St. Louis, MO 63143. 1. Linux is a Preemptive Kernel. The Linux kernel executes concurrently with itself:. David Ferry, Chris Gill. CSE 522S - Advanced Operating Systems. Washington University in St. Louis. St. Louis, MO 63143. 1. Linux is a Preemptive Kernel. The Linux kernel executes concurrently with itself:. Dr . Damitha. . Karunaratna. . University of Colombo school of computing. Topics to discuss. What is an operating system(OS)?. Main objectives of an OS. Main functions of an OS. Evolution of OS.. History and Hardware. 1: Operating Systems Overview. 2. This is the simplest animal with a “brain”. Caenorphabditis elegans. C. elegans.  is one of the simplest organisms with a nervous system. This system comprises 302 neurons the pattern of which has been comprehensively mapped, in what is known as a connectome. . Introduction. Content from. Operating Systems in Depth Thomas w. . Doeppner. ©2011. Operating Systems Principles & Practices by Anderson and . Dahlin. . 2014. Tannenbaum 2015. Stallings 2015. and Deadlocks. Ref: . http://userhome.brooklyn.cuny.edu/irudowdky/OperatingSystems.htm. & . Silberschatz. , Gagne, & Galvin, . Operating Systems Concepts. , 7. th. . ed. , Wiley (. ch. 1-3). Operating systems (OS) can help computer users do many things, like managing and manipulating files and folders.. Operating systems also provide users the ability to control hardware components of a computer and its peripheral devices, like printers and scanners.. 3. Higher-Level Synchronization 3.1 Shared Memory Methods Monitors Protected Types 3.2 Distributed Synchronization/Comm. Message-Based Communication Procedure-Based Communication Distributed Mutual Exclusion