CSC/ECE 506 Spring 21012/11a ht: Difference between revisions
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When dealing with a relatively small number of processors (8-16), according to Solihin 320, using a bus based shared memory structure is fine. Unfortunately, when you need to provide a shared memory structure for processors much greater than that, you will need a different set of organization. This new organization is needed due to the physical limitations of the bus. There are two ways you can create such a system. These include [http://en.wikipedia.org/wiki/Distributed_shared_memory Distributed Shared Memory] (DSM) or [http://en.wikipedia.org/wiki/Non-Uniform_Memory_Access Non-Uniform Memory Access] (NUMA). | When dealing with a relatively small number of processors (8-16), according to Solihin 320, using a bus based shared memory structure is fine. Unfortunately, when you need to provide a shared memory structure for processors much greater than that, you will need a different set of organization. This new organization is needed due to the physical limitations of the bus. There are two ways you can create such a system. These include [http://en.wikipedia.org/wiki/Distributed_shared_memory Distributed Shared Memory] (DSM) or [http://en.wikipedia.org/wiki/Non-Uniform_Memory_Access Non-Uniform Memory Access] (NUMA). The benefits of having a DSM and NUMA is that we can now scale to a larger amount of processors. The disadvantage is that scaling in such a way may not be the most cost-effective solution, Solihin 320. For the remainder of this section, we will be discussing the performance of DSM's. | ||
Revision as of 19:58, 13 April 2012
DSM PERFORMANCE
Introduction
When dealing with a relatively small number of processors (8-16), according to Solihin 320, using a bus based shared memory structure is fine. Unfortunately, when you need to provide a shared memory structure for processors much greater than that, you will need a different set of organization. This new organization is needed due to the physical limitations of the bus. There are two ways you can create such a system. These include Distributed Shared Memory (DSM) or Non-Uniform Memory Access (NUMA). The benefits of having a DSM and NUMA is that we can now scale to a larger amount of processors. The disadvantage is that scaling in such a way may not be the most cost-effective solution, Solihin 320. For the remainder of this section, we will be discussing the performance of DSM's.