ECE506 CSC/ECE 506 Spring 2012/11a az
11a. Performance of DSM systems. Distributed shared memory systems combine the programming models of shared memory systems, and the scalability of distributed systems. However, since DSM systems need extra coordination between software layer and underlying hardware, achieving good performance could be a big challenge. The factors that harm the performance could be the overhead to maintain cache coherence, memory consistency, and the latency of interconnections. Please further explore the factors that can affect the performance of DSM systems, and the improvements that have been made on the existing systems.
Introduction
Performance Concerns
Maintaining cache coherence
Maintaining memory consistency
Latency of interconnections
Performance Improvements
Maintaining cache coherence
Maintaining memory consistency
Latency of interconnections
Definitions
- DSM
- Distributed shared memory, a parallel computer architecture which consists of a set of nodes that contain their own local memory, but all nodes are connected together, making their memories one shared addressable space.
- node
- A compute unit that makes up one components of a DSM system. A node consists of one or more sets of processors, cache, and memory. A node is connected to the larger DSM system through an interconnect.
References
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