PDF-The DirectoryBased Cache Coherence Protocol for the DASH Multiprocessor Daniel Lenoski

The architecture consists of powerful processing nodes each with a portion of the sharedmemory connected to a scalable interconnection network A key feature of DASH is its dis tributed directorybased cache coherence protocol Unlike tra ditional snoo. For each of the approaches the associated protocol is outlined The simulation model is described and results from that model are presented The magnitude of the potential performance difference between the various approaches indicates that the choice b The rolling shutter used by sensors in these cameras also produces warping in the output frames we have exagerrated the effect for illustrative purposes c We use gyroscopes to measure the cameras rotations during video capture d We use the measure 1 1 CS448 2 What is Cache Coherence? • Two processors can have two different values for the same memory location Write Through Cache 2 3 Terminology • Coherence – Defines what va George Kurian. 1. , Omer Khan. 2. , . Srini. . Devadas. 1. 1 . Massachusetts Institute of Technology. 2 . University of Connecticut, Storrs. 1. Cache Hierarchy Organization. Directory-Based Coherence. -Client Pairing: A Framework for Implementing Coherence Hierarchies. Jesse G. Beu. Michael C. Rosier. Thomas M. Conte. Tinker Research. Georgia Institute . of Technology. The Problem. Coherence protocols can be difficult to design properly. Plasmaspheric. Hiss . Van Allen Probes/BARREL 2014 . cooperative campaign. EFW team: Aaron Breneman, John . Wygant. , Cynthia . Cattell. , David . Malaspina. , and others. University of Minnesota. BARREL team: . Linear Speedup. Basic Multiprocessor. Centralized-memory multiprocessor. Distributed-memory multiprocessor. Invalid Based Cache Coherence Protocol. Processor 1 Processor 2 Processor 3 . Event. 0) No Copy No Copy No copy . †. : Rethinking Hardware for Disciplined Parallelism. Byn Choi, Rakesh Komuravelli, Hyojin Sung, . Rob Bocchino, Sarita Adve, Vikram Adve. Other collaborators:. Languages: Adam Welc, Tatiana Shpeisman, Yang Ni (Intel). THE . DASH -. The dash (–) is used to set off additional material within a . sentence. Dashes are often used to . emphasize. the material they set off. . To . set off appositives that contain . commas. Smruti R. Sarangi, IIT Delhi. Contents. Overview of the Directory Protocol. Details. Optimizations. Basic Idea of a Coherence Protocol. Memory Level . n. Memory Level . n+2. Private Cache. Private Cache. :. What is Cache Coherence?. Cache Coherence: Do we need it? . Coherence Property - I:. Read R from Address X on Core C0 returns the value written by the most recent write W on X on C0, if no other core has written to X between W and R.. Background. Original dash was made from sheet metal, foam, and vinyl. Was too heavy for its purpose. Didn’t offer standard gauge sizes. Didn’t offer any knee room. Wasn’t originally fitted with a stereo. 2. Educational objectives The MESI protocol simulator is widely used in several courses about Computer Architecture, Computer Design and Multiprocessor Systems in the University of Cordoba. The syllab 1. 1051IM4B01. TLMXB4B . (. M0842). Tue 3,4 (10:10-12:00) . B507. Introduction to . Case Study for Information Management. Min-. Yuh. Day. 戴敏育. Assistant Professor. 專任助理教授. . Dept. of Information Management.