sched_setparam - phpMan

SCHED_SETPARAM(2)          Linux Programmer’s Manual         SCHED_SETPARAM(2)



NAME
       sched_setparam, sched_getparam - set and get scheduling parameters

SYNOPSIS
       #include <sched.h>

       int sched_setparam(pid_t pid, const struct sched_param *p);

       int sched_getparam(pid_t pid, struct sched_param *p);

       struct sched_param {
           ...
           int sched_priority;
           ...
       };

DESCRIPTION
       sched_setparam sets the scheduling parameters associated with the scheduling policy
       for the process identified by pid. If pid is zero, then the parameters of the  cur-
       rent process are set. The interpretation of the parameter p depends on the selected
       policy. Currently, the following three  scheduling  policies  are  supported  under
       Linux: SCHED_FIFO, SCHED_RR, and SCHED_OTHER.

       sched_getparam  retrieves  the  scheduling parameters for the process identified by
       pid. If pid is zero, then the parameters of the current process are retrieved.

       sched_setparam checks the validity of p for the scheduling policy of  the  process.
       The parameter p->sched_priority must lie within the range given by sched_get_prior-
       ity_min and sched_get_priority_max.

       POSIX systems on which  sched_setparam  and  sched_getparam  are  available  define
       _POSIX_PRIORITY_SCHEDULING in <unistd.h>.


RETURN VALUE
       On  success, sched_setparam and sched_getparam return 0.  On error, -1 is returned,
       errno is set appropriately.

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

       EPERM  The calling process does not have appropriate privileges. The process  call-
              ing  sched_setparam  needs  an effective uid equal to the euid or uid of the
              process identified by pid, or it must be a superuser process.

       EINVAL The parameter p does not make sense for the current scheduling policy.

CONFORMING TO
       POSIX.1b (formerly POSIX.4)

SEE ALSO
       sched_setaffinity(2), sched_getaffinity(2), sched_setscheduler(2),  sched_getsched-
       uler(2),  sched_get_priority_max(2),  sched_get_priority_min(2), nice(2), setprior-
       ity(2), getpriority(2),

       sched_setscheduler(2) has a description of the Linux scheduling scheme.

       Programming for the real world - POSIX.4 by Bill O. Gallmeister, O’Reilly  &  Asso-
       ciates, Inc., ISBN 1-56592-074-0
       IEEE Std 1003.1b-1993 (POSIX.1b standard)
       ISO/IEC 9945-1:1996



Linux 1.3.81                      1996-04-10                 SCHED_SETPARAM(2)

Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2008-11-23 20:37 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)