PPT-3. Higher-Level Synchronization

3 HigherLevel Synchronization 31 Shared Memory Methods Monitors Protected Types 32 Distributed SynchronizationComm MessageBased Communication ProcedureBased Communication Distributed Mutual Exclusion. ReferenceBroadcast Synchronization RBS is a technique that allows a set of receivers in a broadcast network to accurately esti mate each others clock values RBS provides a relative timeframe for conversion between the local clocks of di erent nodes wait Bi l s gna C lock acquire D lock release E signalAll Hoare monitor semantics Assume thread T1 is waiting on condition Assume thread T2 is in the monitor Assume thread T2 calls x signal T2 ives u monitor T2 blocks gp T1 takes over monitor run Spinlocks and all the rest. Synchronization Overview. Cache coherency. Single versus Multi-core. Under versus Oversubscribed. Atomic operations. …. Synchronization Overview. Spinlock. acquire_lock. : Adaptively . Combining Pessimistic and. Optimistic Synchronization for Efficient Parallel Runtime Support. Man Cao. Minjia. Zhang. Michael D. Bond. 1. Dynamic Analyses for Parallel Programs. Data Race Detector, . Hakim Weatherspoon. CS 3410, Spring 2013. Computer Science. Cornell University. P&H Chapter . 2.11 and 5.8. Big Picture: Parallelism and Synchronization. How do I take advantage of multiple processors; . Synchronization. How to synchronize processes?. Need to protect access to shared data to avoid problems like race conditions. Typical example: Updating a shared account balance. Problem below?. Processor 1. Hakim Weatherspoon. CS 3410, Spring 2012. Computer Science. Cornell University. P&H Chapter 2.11. Administrivia. Pizza . party: PA3 Games Night. Friday, April 27. th. , 5:00-7:00pm. Location: Upson . Susmitha. . kota. . 21-sep-2015. AGENDA. Introduction. Synchronization. Physical Clocks. Global Positioning System. Algorithms. Future Work. References. Introduction: Real . Time System. Hakim Weatherspoon. CS 3410, Spring 2012. Computer Science. Cornell University. P&H Chapter 2.11. Goals for Today. Synchronization. Threads and processes. Critical sections, race conditions, and . . draft-dimitri-ospf-phased-db-sync-00.txt. Dimitri Papadimitriou. Alcatel-Lucent. IETF 79 – Beijing. November 7-12, 2010. Motivation. Opaque LSAs . OSPF extensibility: information contained in Opaque LSAs often used by application wishing to distribute information throughout OSPF domain (so called "non-IP routing information"). Pro .Net Programming in C#, Adam Freeman. The Trouble with Data. Account balance problem. Going into the races. Creating some order. Sequential execution. Immutability. Isolation. Synchronization. The Trouble with Data. Kaushik. . Majumdar. Indian Statistical Institute. 8th Mile, Mysore Road. Bangalore 560059. https://sites.google.com/site/isicng/. Workshop on “Cognition, Emotion and Computing,” Infosys Limited, Bangalore, 30 April 2013. This adjustment computes the interest component of the revenue requirement. The interest expense (component) is computed by multiplying the rate base by weighted cost of debt. The calculated interest expense is then compared against the interest expense used by the Company in its computation of test year income tax expense. The tax effect of the difference in interest expense is the adjustment for interest synchronization. The effect of this adjustment is to ensure that the revenue requirement reflects the tax savings generated by the interest component of the revenue requirement. . in Wireless Sensor Networks. Philipp Sommer. Roger Wattenhofer. Time Synchronization is a well-studied Problem. Time, Clocks, and the Ordering of Events in a Distributed System. L. Lamport, Communications of the ACM, 1978..