madvise man page on OpenBSD

Man page or keyword search:  
man Server   11362 pages
apropos Keyword Search (all sections)
Output format
OpenBSD logo
[printable version]

MADVISE(2)		  OpenBSD Programmer's Manual		    MADVISE(2)

NAME
     madvise, posix_madvise - give advice about use of memory

SYNOPSIS
     #include <sys/mman.h>

     int
     madvise(void *addr, size_t len, int behav);

     int
     posix_madvise(void *addr, size_t len, int behav);

DESCRIPTION
     The madvise() system call allows a process that has knowledge of its
     memory behavior to describe it to the system.  The posix_madvise()
     interface is identical and is provided for standards conformance.

     The possible behaviors are:

     MADV_NORMAL      No further special treatment needed.

     MADV_RANDOM      Expect random page access patterns.

     MADV_SEQUENTIAL  Expect sequential page references.

     MADV_WILLNEED    The pages will be referenced soon.

     MADV_DONTNEED    The pages will not be referenced soon.

     MADV_SPACEAVAIL  Ensure that resources are reserved.

     MADV_FREE	      The pages don't contain any useful data and can be
		      recycled.

     Portable programs that call the posix_madvise() interface should use the
     aliases POSIX_MADV_NORMAL, POSIX_MADV_RANDOM, POSIX_MADV_SEQUENTIAL,
     POSIX_MADV_WILLNEED, and POSIX_MADV_DONTNEED rather than the flags
     described above.

RETURN VALUES
     Upon successful completion, a value of 0 is returned.  Otherwise, a value
     of -1 is returned and errno is set to indicate the error.

SEE ALSO
     mincore(2), minherit(2), mprotect(2), msync(2), munmap(2)

STANDARDS
     The posix_madvise() system call is expected to conform to the IEEE Std
     1003.1-2001 (``POSIX'') standard.

HISTORY
     The madvise function first appeared in 4.4BSD.  The posix_madvise
     function first appeared in OpenBSD 4.8.

OpenBSD 4.9			 May 19, 2010			   OpenBSD 4.9
[top]

List of man pages available for OpenBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net