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Author Gifford, David K.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword Associative memory ♦ Primary memory requirement ♦ Level of multiprogramming ♦ Working set ♦ Virtual memory ♦ Resource allocation ♦ Referencing characteristics ♦ Lru stack model
Abstract A minor hardware extension the Honeywell 6180 processor is demonstrated to allow the primary memory requirements of a process in Multics to be approximated. The additional hardware required for this estimate to be computed consists of a program accessible register containing the miss rate of the associative memory used for page table words. This primary memory requirement estimate was employed in an experimental version of Multics to control the level of multiprogramming in the system and to bill for memory usage. The resulting system's tuning parameters display configuration insensitivity, and it is conjectured that the system would also track shifts in the referencing characteristics of its workload and keep the system in tune.
Description Affiliation: Massachusetts Institute of Technology, Cambridge (Gifford, David K.)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 20
Issue Number 9
Page Count 9
Starting Page 655
Ending Page 663


Source: ACM Digital Library