CSC/ECE 506 Fall 2007/wiki1 7 2281: Difference between revisions
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Are the interconnection structures different in new computers now than they were 10 years ago? | Are the interconnection structures different in new computers now than they were 10 years ago? | ||
What is the size and capacity of current SMPs? How have supercomputers evolved since the Cray T3E? | What is the size and capacity of current SMPs? How have supercomputers evolved since the Cray T3E? | ||
In the parallel computing world, this is the range of Memory addresses accessed / shared by multiple processors. | |||
"Shared Memory Multi-Processors" is a class of parallel machines which use Shared Address Space for parallelisation. | |||
=== Organisation of address spaces === | === Organisation of address spaces === | ||
Pentium can access about 4GB of physical Memory and about 64TB of virtual Memory | |||
Physical access has now become virtual access, where the user will feel that the memory to be accessed is infinite, | |||
since virtual memory mechanism includes the lower elements in the memory hierarchy for expanding memory addresses. | |||
Paging and Segmentation have also evolved to give better access to the Address space. Segmentation being older than | |||
Paging; segmentation had limits, which were overcome by paging (4kb chunks) | |||
=== Interconnection structure === | === Interconnection structure === | ||
=== Current SMPs (Symmetric Multiprocessing) === | === Current SMPs (Symmetric Multiprocessing) === | ||
=== Supercomputer evolution since Cray T3E === | === Supercomputer evolution since Cray T3E === | ||
== References == | |||
Computer User: http://www.computeruser.com/resources/dictionary/definition.html?lookup=7776 | |||
foldoc : http://foldoc.org/index.cgi?symmetric+multiprocessing | |||
searchdatacenter : http://searchdatacenter.techtarget.com/sDefinition/0,,sid80_gci214218,00.html | |||
Revision as of 03:18, 4 September 2007
Any changes in the organization of address spaces in the last 10 years? Are the interconnection structures different in new computers now than they were 10 years ago? What is the size and capacity of current SMPs? How have supercomputers evolved since the Cray T3E?
In the parallel computing world, this is the range of Memory addresses accessed / shared by multiple processors. "Shared Memory Multi-Processors" is a class of parallel machines which use Shared Address Space for parallelisation.
Organisation of address spaces
Pentium can access about 4GB of physical Memory and about 64TB of virtual Memory Physical access has now become virtual access, where the user will feel that the memory to be accessed is infinite,
since virtual memory mechanism includes the lower elements in the memory hierarchy for expanding memory addresses. Paging and Segmentation have also evolved to give better access to the Address space. Segmentation being older than
Paging; segmentation had limits, which were overcome by paging (4kb chunks)
Interconnection structure
Current SMPs (Symmetric Multiprocessing)
Supercomputer evolution since Cray T3E
References
Computer User: http://www.computeruser.com/resources/dictionary/definition.html?lookup=7776 foldoc : http://foldoc.org/index.cgi?symmetric+multiprocessing searchdatacenter : http://searchdatacenter.techtarget.com/sDefinition/0,,sid80_gci214218,00.html