PPT-Synchronizing Processes Clocks

External clock synchronization Cristian Internal clock synchronization Gusella amp Zatti Network Time Protocol Mills Decisions Agreement protocols Fischer Data Distributed file . Carefully Synchronizing Words. Pavel. . Martyugin. Ural State University, . Ekaterinburg. , Russia. Workshop Dynamical . Aspects of Automata and . Semigroup. Theories, . 25-26 November 2010, Wien. , . Spring 2009. L. -9 . Logical Time. 1. Announcements. Project 1 update – Thursday. Due 2/26. HW 1 – due Thursday. 2. Last Lecture . –. Clock Sync Important Lessons. Clocks on different systems will always behave differently. Shiva . Bottu. Organization. Introduction. High level Implementation Details. Experimentation. Results. Further Research. Introduction. Lamport’s logical clocks are introduced to capture causality relation . Topics. Logical clocks. Totally-Ordered Multicasting. Readings. L. Lamport, “Time, Clocks and the Ordering of Events in Distributed Systems,” . Communications of the ACM, . Vol. 21, No. 7, July 1978, pp. 558-565.. Generated Clocks. The HCC generates two clocks from the . ePLL. 160 MHz clocks and the chip 40 MHz clock, used as a reference:. An 80 MHz clock using a divide by 2 circuit that contains no loops and so is self clearing.. Time keeps on slipping, slipping…. Logistics. Last week’s slides online. Sign up on Piazza now. No really, do it now. Papers are loaded in . HotCRP. Sign up for account at . http://cs7780.ccs.neu.edu. Susmitha. . kota. . 21-sep-2015. AGENDA. Introduction. Synchronization. Physical Clocks. Global Positioning System. Algorithms. Future Work. References. Introduction: Real . Time System. Clocks. External clock synchronization (. Cristian. ). Internal clock synchronization (. Gusella. & . Zatti. ). Network Time Protocol (Mills). Decisions. Agreement protocols (Fischer). Data. Distributed file . Ken Birman. Cornell University. . CS5410 . Fall 2008. . Real time and clocks. Lamport showed that if we care about event ordering, the best option is to use logical clocks. But suppose we care about real time?. zheng. Lin, . Lei Yang. , . Yunhao. Liu. Synchronizing. . Social. . Television. . Through. . Hidden. . Sound. . Markers. . The Hong Kong Polytechnic . University. Tsinghua. . University. Social. Clocks. External clock synchronization (. Cristian. ). Internal clock synchronization (. Gusella. & . Zatti. ). Network Time Protocol (Mills). Decisions. Agreement protocols (Fischer). Data. Distributed file . www.cse.buffalo.edu/~bina/cse486/.../TimeGlobalStatesApr20.ppt. Contents. Introduction. Clocks. , events and process states. Synchronizing . physical clocks. Logical . time & logical . clocks. Contents. . kota. . 21-sep-2015. AGENDA. Introduction. Synchronization. Physical Clocks. Global Positioning System. Algorithms. Future Work. References. Introduction: Real . Time System. 1. . A . Hadi Esmaeilzadeh. hadi@cc.gatech.edu. . Georgia Institute of Technology. Some slides adopted from Prof. . Milos . Prvulovic. Asynchronous vs. . Synchronious. Glitches and delays are . very. hard to deal with.