JPS6412351A - Virtual storage control system - Google Patents

Virtual storage control system

Info

Publication number
JPS6412351A
JPS6412351A JP62168439A JP16843987A JPS6412351A JP S6412351 A JPS6412351 A JP S6412351A JP 62168439 A JP62168439 A JP 62168439A JP 16843987 A JP16843987 A JP 16843987A JP S6412351 A JPS6412351 A JP S6412351A
Authority
JP
Japan
Prior art keywords
page
bits
value
array
operating system
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.)
Pending
Application number
JP62168439A
Other languages
Japanese (ja)
Inventor
Toshihisa Taniguchi
Hideo Sawamoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62168439A priority Critical patent/JPS6412351A/en
Publication of JPS6412351A publication Critical patent/JPS6412351A/en
Pending legal-status Critical Current

Links

Landscapes

  • Memory System Of A Hierarchy Structure (AREA)

Abstract

PURPOSE:To prevent the overhead of an operating system from being increased, by providing a reference counter of (n) bits which holds the number of times of page reference at every prescribed period in a unit of page instead of the reference bit of a main storage key. CONSTITUTION:An RC array 102 of (n) bits is counted up at an adder circuit 105 at every reference of the said page. When all bits are set at (1)s, no count-up is performed. And the operating system issues an instruction (RRC instruction) to read out the value of an RC (reference counter) within the prescribed period, and reads out the value of the said page of the RC array 102, and updates a nonreference time interval counter according to a count value, and rearranges the queue of the page targeted to be paged out. At this time, the said RC is reset.
JP62168439A 1987-07-06 1987-07-06 Virtual storage control system Pending JPS6412351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62168439A JPS6412351A (en) 1987-07-06 1987-07-06 Virtual storage control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62168439A JPS6412351A (en) 1987-07-06 1987-07-06 Virtual storage control system

Publications (1)

Publication Number Publication Date
JPS6412351A true JPS6412351A (en) 1989-01-17

Family

ID=15868138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62168439A Pending JPS6412351A (en) 1987-07-06 1987-07-06 Virtual storage control system

Country Status (1)

Country Link
JP (1) JPS6412351A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0617077U (en) * 1992-08-11 1994-03-04 三菱電機株式会社 Switchgear
US8320568B2 (en) 2008-06-23 2012-11-27 Huawei Technologies Co., Ltd. Method, apparatus and system for key derivation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0617077U (en) * 1992-08-11 1994-03-04 三菱電機株式会社 Switchgear
US8320568B2 (en) 2008-06-23 2012-11-27 Huawei Technologies Co., Ltd. Method, apparatus and system for key derivation
US10334492B2 (en) 2008-06-23 2019-06-25 Huawei Technologies Co., Ltd. Method, apparatus and system for key derivation

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