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error "Invalid argument" returned after call sched_setscheduler
Post 302128681 by porter on Thursday 26th of July 2007 03:51:46 AM
07-26-2007
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LEARN ABOUT REDHAT
pthread_setschedparam
PTHREAD_SETSCHEDPARAM(3) Library Functions Manual PTHREAD_SETSCHEDPARAM(3) NAME
pthread_setschedparam, pthread_getschedparam - control thread scheduling parameters SYNOPSIS
#include <pthread.h> int pthread_setschedparam(pthread_t target_thread, int policy, const struct sched_param *param); int pthread_getschedparam(pthread_t target_thread, int *policy, struct sched_param *param); DESCRIPTION
pthread_setschedparam sets the scheduling parameters for the thread target_thread as indicated by policy and param. policy can be either SCHED_OTHER (regular, non-realtime scheduling), SCHED_RR (realtime, round-robin) or SCHED_FIFO (realtime, first-in first-out). param spec- ifies the scheduling priority for the two realtime policies. See sched_setpolicy(2) for more information on scheduling policies. The realtime scheduling policies SCHED_RR and SCHED_FIFO are available only to processes with superuser privileges. pthread_getschedparam retrieves the scheduling policy and scheduling parameters for the thread target_thread and store them in the loca- tions pointed to by policy and param, respectively. RETURN VALUE
pthread_setschedparam and pthread_getschedparam return 0 on success and a non-zero error code on error. ERRORS
On error, pthread_setschedparam returns the following error codes: EINVAL policy is not one of SCHED_OTHER, SCHED_RR, SCHED_FIFO EINVAL the priority value specified by param is not valid for the specified policy EPERM the calling process does not have superuser permissions ESRCH the target_thread is invalid or has already terminated EFAULT param points outside the process memory space On error, pthread_getschedparam returns the following error codes: ESRCH the target_thread is invalid or has already terminated EFAULT policy or param point outside the process memory space AUTHOR
Xavier Leroy <Xavier.Leroy@inria.fr> SEE ALSO
sched_setscheduler(2), sched_getscheduler(2), sched_getparam(2), pthread_attr_setschedpolicy(3), pthread_attr_setschedparam(3). LinuxThreads PTHREAD_SETSCHEDPARAM(3)