установить и получить параметры расписания (set and get scheduling parameters)
Имя (Name)
sched_setparam, sched_getparam - set and get scheduling
parameters
Синопсис (Synopsis)
#include <sched.h>
int sched_setparam(pid_t pid, const struct sched_param *param);
int sched_getparam(pid_t pid, struct sched_param *param);
struct sched_param {
...
int sched_priority;
...
};
Описание (Description)
sched_setparam() sets the scheduling parameters associated with
the scheduling policy for the thread whose thread ID is specified
in pid. If pid is zero, then the parameters of the calling
thread are set. The interpretation of the argument param depends
on the scheduling policy of the thread identified by pid. See
sched(7) for a description of the scheduling policies supported
under Linux.
sched_getparam() retrieves the scheduling parameters for the
thread identified by pid. If pid is zero, then the parameters of
the calling thread are retrieved.
sched_setparam() checks the validity of param for the scheduling
policy of the thread. The value param->sched_priority must lie
within the range given by sched_get_priority_min(2) and
sched_get_priority_max(2).
For a discussion of the privileges and resource limits related to
scheduling priority and policy, see sched(7).
POSIX systems on which sched_setparam() and sched_getparam() are
available define _POSIX_PRIORITY_SCHEDULING in <unistd.h>.
Возвращаемое значение (Return value)
On success, sched_setparam() and sched_getparam() return 0. On
error, -1 is returned, and errno is set to indicate the error.
Ошибки (Error)
EINVAL Invalid arguments: param is NULL or pid is negative
EINVAL (sched_setparam()) The argument param does not make sense
for the current scheduling policy.
EPERM (sched_setparam()) The caller does not have appropriate
privileges (Linux: does not have the CAP_SYS_NICE
capability).
ESRCH The thread whose ID is pid could not be found.
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Смотри также (See also)
getpriority(2), gettid(2), nice(2), sched_get_priority_max(2),
sched_get_priority_min(2), sched_getaffinity(2),
sched_getscheduler(2), sched_setaffinity(2), sched_setattr(2),
sched_setscheduler(2), setpriority(2), capabilities(7), sched(7)
