PPT-Fundamentals of Memory Consistency

Smruti R Sarangi Prereq Slides for Chapter 11 Multiprocessor Systems Computer Organisation and Architecture Smruti R Sarangi McGrawHill 2015 1 Contents Basic Terminology Program Order Relaxations. Avg Access Time 2 Tokens Number of Controllers Average Access Time clock cyles brPage 16br Number of Tokens vs Avg Access Time 9 Controllers Number of Tokens Average Access Time clock cycles brPage 17br brPage 18br Weak Consistency Models. Madan Musuvathi. Research in Software Engineering. Microsoft Research. Hard to program. Hard to test. Hard to debug. General consensus: trade consistency for . Availability. Performance. Dr. Sarah N. Garfinkel. Brighton and Sussex Medical School. Applied Cognitive Psychology. Stress & Memory. Complicated! . Stress can facilitate memory. Stress can impair memory . . How and why? .  . Centre for the Study of Emotion and Law. Psychology and the law:. Decision-making and. the Science of emotion. Emotion and law – not an odd couple. How common is ‘common sense’?. The assumptions judges make. Distributed Shared Memory. Shared Memory. Shared memory programs are easier to write. Multiprocessor systems. Message passing systems:. - no physically shared memory. - need to provide an abstraction of shared memory: Distributed Shared Memory. Steven . Pelley. , Peter M. Chen, Thomas F. . Wenisch. University of Michigan. Nonvolatile memory (NVRAM) recovery. 2. Writes unordered!. Constrain persist order for correctness, . but reorder for performance. Fundamentals of Computing. Introduction to Computers & Java. September 26, 2012. CSS 161: Fundamentals of Computing. Instructor: . Uma. Murthy. CSS SKL 161 A Instructor: Joe McCarthy. Outline. Update / reminder. Smruti R. Sarangi. Prereq. : Slides for Chapter 11 (Multiprocessor Systems), Computer . Organisation. and Architecture, Smruti R. Sarangi, McGrawHill, 2015. 1. Contents. Basic Terminology. Program Order Relaxations. Youyou. Lu. 1. , . Jiwu. Shu. 1. , . Long Sun. 1. , . Onur. Mutlu. 2. 1. Tsinghua University. 2. Carnegie Mellon University. Problem:. . Strict write ordering . required for storage consistency dramatically degrades performance in persistent memory. Ramoliya. . . dipak.ramoliya@darshan.ac.in. Computer Engineering Darshan . Institute of Engineering & . Technology. Unit: 6 . Distributed . Shared Memory. Koo. sm.koo1989@gmail.com. “NVM Duet: Unified Working Memory and Persistent Store Architecture”. Ren-. Shuo. Liu, De-Yu Shen, Chia-Lin Yang, Shun-. Chih. Yu, Cheng-Yuan Michael Wang. Index. Background. Paul Filkin, Director of Client Communities,. SDL Language Technologies. 1. how Trados was developed and established itself as industry leader. how . translation memory tools work. what . their benefits for open (and professional) translators are. MIT’s RISCY Expedition. Andy Wright, . Sizhuo. Zhang, Thomas . Bourgeat. , Amol . Bhave. , Jamey Hicks, Arvind. Computer Science & Artificial Intelligence Lab.. Massachusetts Institute of Technology. Topics: synchronization wrap-up, . need for sequential consistency, fences . 2. Load-Linked and Store Conditional. LL-SC is an implementation of atomic read-modify-write. with very high flexibility.