DocumentCode :
3311138
Title :
Effect of data access delays and system partitionability on the dynamic performance of a shared memory multiprocessor
Author :
Abraham, Seth ; Padmanabhan, Krishnan
Author_Institution :
Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA
fYear :
1992
fDate :
16-20 Nov 1992
Firstpage :
674
Lastpage :
682
Abstract :
Any architectural or operational inefficiencies in multiprocessors with thousands of processors are likely to have a significant negative impact on the performance of the system. The authors examine two such issues in large-scale shared memory multiprocessors-the delays involved in accessing global shared memory, and the low processor utilization resulting from inefficient partitioning of the system among several tasks. These studies are undertaken using a simulation model that directly integrates the nondeterministic interconnection network delays encountered during shared memory accesses into the execution of tasks on processors. The results show the quantitative impact of interconnection network delay on system performance and point to ways of reducing this impact. Furthermore, when incoming tasks have large processor requirements, the system´s inability to partition the processors among several tasks efficiently has a significant detrimental effect on performance. The effectiveness of some techniques to solve this partitionability problem is discussed
Keywords :
delays; performance evaluation; shared memory systems; data access delays; delays; dynamic performance; global shared memory; low processor utilization; nondeterministic interconnection network delays; performance; processor requirements; shared memory accesses; shared memory multiprocessor; simulation model; system partitionability; Computer architecture; Delay effects; Delay systems; Laboratories; Large-scale systems; Multiprocessor interconnection networks; Predictive models; Stochastic processes; Supercomputers; System performance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Supercomputing '92., Proceedings
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-8186-2630-5
Type :
conf
DOI :
10.1109/SUPERC.1992.236635
Filename :
236635
Link To Document :
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