DocumentCode :
1145432
Title :
Effects of Cache Coherency in Multiprocessors
Author :
Dubois, Michel ; Briggs, Faye A.
Author_Institution :
Thomson-CSF/LCR Domaine de Corbeville
Issue :
11
fYear :
1982
Firstpage :
1083
Lastpage :
1099
Abstract :
In many commercial multiprocessor systems, each processor accesses the memory through a private cache. One problem that could limit the extensibility of the system and its performance is the enforcement of cache coherence. A mechanism must exist which prevents the existence of several different copies of the same data block in different private caches. In this paper, we present an in-depth analysis of the effects of cache coherency in multiprocessors. A novel analytical model for the program behavior of a multitasked system is introduced. The model includes the behavior of each process and the interactions between processes with regard to the sharing of data blocks. An approximation is developed to derive the main effects of the cache coherency contributing to degradations in system performance.
Keywords :
Cache; cache coherence; multicache consistency; multiprocessors; performance evaluation; Analytical models; Coherence; Contracts; Degradation; Multiprocessing systems; Multiprocessor interconnection networks; System performance; Throughput; Cache; cache coherence; multicache consistency; multiprocessors; performance evaluation;
fLanguage :
English
Journal_Title :
Computers, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9340
Type :
jour
DOI :
10.1109/TC.1982.1675925
Filename :
1675925
Link To Document :
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