bonnetf@apo.esiee.fr (bonnet-franck) (02/07/90)
First I would like to thank everybody for fast awnsering about MSPICE Mentor Graphics server running in 10.1. ( I am beginner in world-wide network practice. ) Now a new question. Could somebody explain in detail what is JLRU ? I guess it is a UNIX method to allocate virtual memory,but I would like to know more precisly the mechanisms and principes. Is there a book talking about it ? Thanks. Frank Bonnet bonnetf@apo.esiee.fr E.S.I.E.E (Ecole Superieure d'Ingenieurs en Electrotechnique et Electronique) FRANCE
krowitz%richter@UMIX.CC.UMICH.EDU (David Krowitz) (02/07/90)
JLRU is "Just Like *Real* Unix". Unix systems require that the disk space for a program's virtual memory be allocated immediately when the program is started rather than being allocated only as it is first accessed by the program. Unix does this to make certain that a program doesn't die in the middle of its execution due to a lack of disk space. Either the program will refuse to start, or it will grab the maximum amount of disk space it could use and then start and run to completion. -- David Krowitz krowitz@richter.mit.edu (18.83.0.109) krowitz%richter.mit.edu@eddie.mit.edu krowitz%richter.mit.edu@mitvma.bitnet (in order of decreasing preference)
lori@hacgate.scg.hac.com (Lori Barfield + 7/9) (02/08/90)
In article <9002070833.AA02556@apo.esiee.fr> bonnetf@apo.esiee.fr (bonnet-franck) writes: >Could somebody explain in detail what is JLRU ? A poorly implemented subset of JLRA. ...lori ;-)
franka@mentor.com (Frank A. Adrian) (02/08/90)
In article <9002071439.AA03945@richter.mit.edu> krowitz%richter@UMIX.CC.UMICH.EDU (David Krowitz) writes: >... Either the program will refuse to start, or it will >grab the maximum amount of disk space it could use and then start >and run to completion. Actually, it grabs the amount of disk space necessary for the text segment, the static data objects, and the stack. Storage for dy- namically allocated objects (via malloc, etc.) is allocated as needed. This doesn't help much for FORTRAN common blocks, though. -- Frank A. Adrian Mentor Graphics, Inc. franka@mntgfx.com