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

NAME
       schedsetparam, schedgetparam - set and get scheduling parameters

SYNOPSIS
       #include 

       int schedsetparam(pidt pid, const struct schedparam *param);

       int schedgetparam(pidt pid, struct schedparam *param);

       struct schedparam {
           ...
           int schedpriority;
           ...
       };

DESCRIPTION
       schedsetparam()  sets  the  scheduling  parameters associated with the
       scheduling policy for the process identified by pid.  If pid  is  zero,
       then the parameters of the calling process are set.  The interpretation
       of the argument param depends on the scheduling policy of  the  process
       identified  by pid.  See schedsetscheduler(2) for a description of the
       scheduling policies supported under Linux.

       schedgetparam() retrieves the scheduling parameters  for  the  process
       identified  by pid.  If pid is zero, then the parameters of the calling
       process are retrieved.

       schedsetparam() checks the validity of param for the scheduling policy
       of  the  process.   The value param->schedpriority must lie within the
       range given by schedgetprioritymin(2) and schedgetprioritymax(2).

       For a discussion of the  privileges  and  resource  limits  related  to
       scheduling priority and policy, see schedsetscheduler(2).

       POSIX systems on which schedsetparam() and schedgetparam() are avail‐
       able define POSIXPRIORITYSCHEDULING in .

RETURN VALUE
       On success, schedsetparam() and schedgetparam() return 0.  On  error,
       -1 is returned, and errno is set appropriately.

ERRORS
       EINVAL The  argument param does not make sense for the current schedul‐
              ing policy.

       EPERM  The calling process does not have appropriate privileges (Linux:
              does not have the CAPSYSNICE capability).

       ESRCH  The process whose ID is pid could not be found.

CONFORMING TO
       POSIX.1-2001.

NOTES
       Scheduling  parameters  are in fact per-thread attributes on Linux; see
       schedsetscheduler(2).

SEE ALSO
       getpriority(2), nice(2), schedgetprioritymax(2),
       schedgetprioritymin(2), schedgetaffinity(2), schedgetscheduler(2),
       schedsetaffinity(2), schedsetscheduler(2), setpriority(2),
       capabilities(7)

       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 3.53 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                             2013-02-12                 SCHEDSETPARAM(2)