JPS5654683A - Working set control system - Google Patents
Working set control systemInfo
- 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
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
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)
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)
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 |
-
1979
- 1979-10-05 JP JP12920879A patent/JPS5654683A/en active Granted
Patent Citations (1)
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)
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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