Memory management system improving the efficiency of fork operations
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 14, 1989
Grant Date -
N/A
app pub date -
Oct 24, 1985
filing date -
Oct 24, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus for implementing fork operations on UNIX or UNIX-emulating operating systems, particularly in multi-user environments reduce the copy time, the number of page faults and, consequently the input-output ('I/O') operations between the central processing unit, main memory and auxilliary memory. In one aspect of the invention, fork operations are executed by redefining those pages of the parent process image resident in main memory as pages of a child process image and modifying the page maps accordingly. Page faults are thereby eliminated for pages located in auxiliary memory. Additional improvements in performance are obtained by monitoring the level of main memory utilization and selecting optical procedures based on the amount of excess capacity in main memory.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully