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Author Sayre, D.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword Measurement ♦ Automatic folding ♦ Demand paging ♦ Automatic paging ♦ Replacement algorithms ♦ Memory hierarchies ♦ Paging ♦ Performance ♦ Folding ♦ Storage hierarchies
Abstract The operation of “folding” a program into the available memory is discussed. Measurements by Brawn et al. and by Nelson on an automatic folding mechanism of simple design, a demand paging unit built at the IBM Research Center by Belady, Nelson, O'Neill, and others, permitting its quality to be compared with that of manual folding, are discussed, and it is shown that given some care in use the unit performs satisfactorily under the conditions tested, even though it is operating across a memory-to-storage interface with a very large speed difference. The disadvantages of prefolding, which is required when the folding is manual, are examined, and a number of the important troubles which beset computing today are shown to arise from, or be aggravated by, this source. It is concluded that a folding mechanism will probably become a normal part of most computing systems.
Description Affiliation: IBM Thomas J. Watson Research Center, Yorktown Heights, NY (Sayre, D.)
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 12
Issue Number 12
Page Count 5
Starting Page 656
Ending Page 660


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Source: ACM Digital Library