sched_get_priority_max man page on Archlinux

Man page or keyword search:  
man Server   11224 pages
apropos Keyword Search (all sections)
Output format
Archlinux logo
[printable version]

SCHED_GET_PRIORITY_MAX(2)  Linux Programmer's Manual SCHED_GET_PRIORITY_MAX(2)

NAME
       sched_get_priority_max,	sched_get_priority_min	 - get static priority
       range

SYNOPSIS
       #include <sched.h>

       int sched_get_priority_max(int policy);

       int sched_get_priority_min(int policy);

DESCRIPTION
       sched_get_priority_max() returns the maximum priority value that can be
       used    with   the   scheduling	 algorithm   identified	  by   policy.
       sched_get_priority_min() returns the minimum priority value that can be
       used  with  the	scheduling  algorithm identified by policy.  Supported
       policy values are SCHED_FIFO, SCHED_RR, SCHED_OTHER,  SCHED_BATCH,  and
       SCHED_IDLE.   Further  details  about  these  policies  can be found in
       sched_setscheduler(2).

       Processes with numerically higher priority values are scheduled	before
       processes  with	numerically  lower  priority  values.  Thus, the value
       returned by sched_get_priority_max() will be  greater  than  the	 value
       returned by sched_get_priority_min().

       Linux allows the static priority value range 1 to 99 for SCHED_FIFO and
       SCHED_RR	 and  the  priority  0	for  SCHED_OTHER,   SCHED_BATCH,   and
       SCHED_IDLE.   Scheduling	 priority  ranges for the various policies are
       not alterable.

       The range of scheduling priorities may vary  on	other  POSIX  systems,
       thus  it is a good idea for portable applications to use a virtual pri‐
       ority range and map  it	to  the	 interval  given  by  sched_get_prior‐
       ity_max() and sched_get_priority_min().	POSIX.1-2001 requires a spread
       of at  least  32	 between  the  maximum	and  the  minimum  values  for
       SCHED_FIFO and SCHED_RR.

       POSIX  systems  on  which sched_get_priority_max() and sched_get_prior‐
       ity_min()   are	 available   define   _POSIX_PRIORITY_SCHEDULING    in
       <unistd.h>.

RETURN VALUE
       On   success,   sched_get_priority_max()	 and  sched_get_priority_min()
       return the maximum/minimum priority value for the named scheduling pol‐
       icy.  On error, -1 is returned, and errno is set appropriately.

ERRORS
       EINVAL The  argument policy does not identify a defined scheduling pol‐
	      icy.

CONFORMING TO
       POSIX.1-2001.

SEE ALSO
       sched_getaffinity(2), sched_getparam(2), sched_getscheduler(2),
       sched_setaffinity(2), sched_setparam(2), sched_setscheduler(2)

       Programming for the real world - POSIX.4 by Bill O. Gallmeister,
       O'Reilly & Associates, Inc., ISBN 1-56592-074-0.

COLOPHON
       This page is part of release 3.65 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2013-09-23	     SCHED_GET_PRIORITY_MAX(2)
[top]

List of man pages available for Archlinux

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