PPT-Kernel Synchronization I

David Ferry Chris Gill CSE 422S Operating Systems Organization Washington University in St Louis St Louis MO 63143 1 Linux is a Preemptive Kernel In Linux many activities may execute concurrently across. Windows and Some Differences from Linux. Brian Railing. 1. st. Year PhD Student. Previously. of. Windows Server Performance Team. 2. Copyright Notice. © 2000-2005 David A. Solomon and Mark Russinovich. Macroprogramming. Systems. Presented by: S. M. . Shahriar. . Nirjon. Timothy W.. . Hnat. and . Kamin. Whitehouse. hnat@cs.virginia.edu, WHITEHOUSE@cs.virginia.edu . Motivation. Synchronization Problems. Rui. . Gu. , . Guoliang. . Jin. , . Linhai. Song, . Linjie. Zhu, Shan Lu. University . of Wisconsin – Madison, USA. Proper Thread Synchronization . is . Hard. Very easy to get things wrong. H. ard-to-find concurrency bugs(Data race, Atomicity Violation, Dead Lock). 0.2 0.4 0.6 0.8 1.0 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 kernel(b) kernel(c) kernel(d) (a)blurredimage(b)no-blurredimage0.900.981.001.021.10 (5.35,3.37)(4.80,3.19)(4.71,3.22)(4.93,3.23)(5.03,3.22 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. 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:. John Erickson, . Madanlal. . Musuvathi. , Sebastian Burckhardt, Kirk . Olynyk. Microsoft . Research. Motivations. Need for race detection in Kernel modules. Also must detect race conditions between hardware and Kernel. . kota. . 21-sep-2015. AGENDA. Introduction. Synchronization. Physical Clocks. Global Positioning System. Algorithms. Future Work. References. Introduction: Real . Time System. 1. . A . fonts used in EMF. . Read the TexPoint manual before you delete this box.: . A. A. A. A. A. Motivation. Clock . Sources & Hardware. Single-Hop Clock Synchronization. Clock Synchronization in Networks. 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.. Multicore. Programming. Brendan Lynch. Introduction. Synchronization techniques. l. ocks, barriers, non-blocking approaches, atomic primitives. Concurrent memory paradigms. s. hared memory, . d. istributed memory. Dr. Yanqing Zhang. Agenda. Overview. Synchronization Techniques. WebDAV(Web Distributed Authoring and Versioning). Future Work. References. What is Synchronization?. In general it is . process of precisely coordinating or matching two or more activities, devices, or processes in time.. . . Makoto Muto (Graduate School of Business Administration, . Hitotsubashi. U., Japan). Tamotsu . Onozaki. (Faculty of Economics, . Rissho. U., Japan). Yoshitaka Saiki (Graduate School of Business Administration, .