JPS5654683A - Working set control system - Google Patents

Working set control system

Info

Publication number
JPS5654683A
JPS5654683A JP12920879A JP12920879A JPS5654683A JP S5654683 A JPS5654683 A JP S5654683A JP 12920879 A JP12920879 A JP 12920879A JP 12920879 A JP12920879 A JP 12920879A JP S5654683 A JPS5654683 A JP S5654683A
Authority
JP
Japan
Prior art keywords
page
frame
bits
working set
turned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12920879A
Other languages
Japanese (ja)
Other versions
JPS6336539B2 (en
Inventor
Naoya Ono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12920879A priority Critical patent/JPS5654683A/en
Publication of JPS5654683A publication Critical patent/JPS5654683A/en
Publication of JPS6336539B2 publication Critical patent/JPS6336539B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Memory System Of A Hierarchy Structure (AREA)

Abstract

PURPOSE: To lower the probability for shortage of the vacant page pool, by cutting out the longest page of yet-using within the working set frame and then allotting the new page where a page fault occurs beyond the upper limit value.
CONSTITUTION: In case a page fault occurs where the maximum value of the working set is set as MWS=6, no relinking is suitable for the page from the page frame but the page 2 at the end of the frame (j) to the top. For the page 2, the W bits corresponding to the page 2 in the page map PMAP is 1, writing is feasible. Thus the contents of this page is first transferred to the secondary memory device, and then the requested information is transferred from the secondary memory device after resetting W bits. And then the R bits are set to 1. At the same time, the field UC holding the present using count value is also reset. Accordingly, the top of the WSCBj is turned to 2 and the last one turned to 13 which was before the page 2. PMAP is also converted.
COPYRIGHT: (C)1981,JPO&Japio
JP12920879A 1979-10-05 1979-10-05 Working set control system Granted JPS5654683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12920879A JPS5654683A (en) 1979-10-05 1979-10-05 Working set control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12920879A JPS5654683A (en) 1979-10-05 1979-10-05 Working set control system

Publications (2)

Publication Number Publication Date
JPS5654683A true JPS5654683A (en) 1981-05-14
JPS6336539B2 JPS6336539B2 (en) 1988-07-20

Family

ID=15003799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12920879A Granted JPS5654683A (en) 1979-10-05 1979-10-05 Working set control system

Country Status (1)

Country Link
JP (1) JPS5654683A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965988A (en) * 1982-10-08 1984-04-14 Hitachi Ltd Actual storage controlling system
JP2008161765A (en) * 2006-12-27 2008-07-17 Hitachi Metals Ltd Manufacturing method of ceramic honeycomb filter
JP2010186381A (en) * 2009-02-13 2010-08-26 Nec Corp Memory management device, memory management method and program

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5458318A (en) * 1977-10-19 1979-05-11 Fujitsu Ltd Job control system in artificial memory system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5458318A (en) * 1977-10-19 1979-05-11 Fujitsu Ltd Job control system in artificial memory system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965988A (en) * 1982-10-08 1984-04-14 Hitachi Ltd Actual storage controlling system
JP2008161765A (en) * 2006-12-27 2008-07-17 Hitachi Metals Ltd Manufacturing method of ceramic honeycomb filter
JP2010186381A (en) * 2009-02-13 2010-08-26 Nec Corp Memory management device, memory management method and program

Also Published As

Publication number Publication date
JPS6336539B2 (en) 1988-07-20

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