PDF-Multiprocessor Cache Coherency

1 1 CS448 2 What is Cache Coherence x2022 Two processors can have two different values for the same memory location Write Through Cache 2 3 Terminology x2022 Coherence x2013 Defines what va. 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 Autumn 2006 CSE P548 Cache Coherence 6 A Lowend MP brPage 4br Autumn 2006 CSE P548 Cache Coherence 7 Cache Coherency Prot ocol Implementations Snooping used with lowend MPs few processors centralized memory busbased distributed implementation Companion slides for. The Art of Multiprocessor Programming. by Maurice Herlihy & Nir Shavit. Art of Multiprocessor Programming. 2. Focus so far: Correctness and Progress. Models. Accurate . (we never lied to you). S. Narravula, P. Balaji, K. Vaidyanathan, . S. Krishnamoorthy, J. Wu and D. K. Panda. The Ohio State University. Presentation Outline. Introduction/Motivation. Design and Implementation. Experimental Results. 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; . UC Berkeley Seismological Laboratory. Towards Optimal Design of Seismic Array For Earthquake Source Imaging . Pablo . Ampuero. Caltech . Seismo. Lab. Yellow Knife Array. (. Rost. & Thomas ,2002). Today’s most popular mobile devices rely on multiple processors, such as the ARM Cortex ™ A15, to satisfy consumer demand for high performance and respon - siveness. But a software-based CS448. 2. What is Cache Coherence?. Two processors can have two different values for the same memory location. Write Through Cache. 3. Terminology. Coherence. Defines what values can be returned by a read. 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; . Companion slides for. The Art of Multiprocessor Programming. by Maurice Herlihy & Nir Shavit. Art of Multiprocessor Programming. 2. Focus so far: Correctness and Progress. Models. Accurate . (we never lied to you). 2. Mutual Exclusion. We will clarify our understanding of mutual exclusion. We will also show you how to reason about various properties in an asynchronous concurrent setting. Art of Multiprocessor Programming. Recall: Microprocessors are classified by how memory is organized. Tightly-coupled multiprocessor systems use the same memory. They are also referred to as . shared memory multiprocessors. .. The processors do not necessarily have to share the same block of physical memory: . Placement and Management. Andreas . Moshovos. University of Toronto/ECE. Short Course, University . of Zaragoza, . July 2009. Most slides are based on or directly taken from material and slides by the original paper authors.