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Conference turris::digital_unix

Title:DIGITAL UNIX(FORMERLY KNOWN AS DEC OSF/1)
Notice:Welcome to the Digital UNIX Conference
Moderator:SMURF::DENHAM
Created:Thu Mar 16 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:10068
Total number of notes:35879

8602.0. "How to determine number of mapentries?" by HYDRA::LNARAYAN () Mon Jan 27 1997 13:54

    Hello
    
    I have few questions about the map entries. I saw the note 7524
    (How to determine number of mapentries used by a shared object?)
    It talks about shared libraires.
    
    what happens when the application is performing a lot of mmap() calls.
    and how to determine the value?
    
    Also -- I guess "mapentries"  and "vm-mapentries" are same
    Can someone help me on this?
    
    Thanks In Advance
    Lakshminarayan
T.RTitleUserPersonal
Name		DateLines
8602.1Read 3276, insted 7524 in the base noteHYDRA::LNARAYANTue Jan 28 1997 11:585
    Hello
    
    Actually I am refering to the note 3276 and not 7524 in the base note.
    
    Thanks
8602.2NETRIX::"[email protected]"Shashi MangalatWed Jan 29 1997 23:1318
>what happens when the application is performing a lot of mmap() calls.
>and how to determine the value?

It depends on what and how you are mapping.  If mapping different files
each mmap() will consume a map entry.  It mapping anonymous memory or
if part of the same file is being mapped it is possible to grow an
existing entry.  Mapping a file with MAP_PRIVATE requires its own
map entry.

>Also -- I guess "mapentries"  and "vm-mapentries" are same

I would think so too.

The vm-mapentries hard limit is likely to go away in Steel.

--shashi

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