pthread_gettimeslice_np(3T)pthread_gettimeslice_np(3T)NAME
pthread_gettimeslice_np(), pthread_settimeslice_np() - set or get the scheduling timeslice value for PTHREAD_SCOPE_PROCESS threads with
SCHED_TIMESHARE scheduling policy
SYNOPSIS PARAMETERS
tslice This parameter specifies the timeslice value in milliseconds to be set.
DESCRIPTION
The functions are used to set and retrieve the timeslice value in milliseconds for timeshare process scope threads. The timeslice value
will not take into effect until the current time quantum is used up for the thread.
sets the timeslice value to tslice for all timeshare process scope threads in the process.
retrieves the process' timeslice value. tslice may range between 0 and
RETURN VALUE
returns the current timeslice value in tslice.
Upon successful completion, returns zero. Otherwise, an error number is returned to indicate the error (the variable is not set).
ERRORS
If any of the following occur, the function returns the following error number:
[EINVAL] The timeslice value was negative or greater than
WARNINGS
Setting the timeslice value lesser than the default timeslice value may cause a performance deterioration.
AUTHOR
and were developed by HP.
SEE ALSO pthread_getschedparam(3T), pthread_attr_setschedpolicy(3T), pthread_attr_getschedparam(3T), pthread_attr_getschedpolicy(3T), rtsched(2).
STANDARDS CONFORMANCE
Pthread Library pthread_gettimeslice_np(3T)
Check Out this Related Man Page
pthread_getschedparam(3T)pthread_getschedparam(3T)NAME
pthread_getschedparam(), pthread_setschedparam() - get or set the scheduling policy and associated parameters
SYNOPSIS PARAMETERS
thread The thread whose scheduling policy and associated parameters are to be set/retrieved.
policy This parameter either points to the memory location where the scheduling policy of thread is returned (get function) or it
specifies the new value of the scheduling policy for thread (set function).
param This parameter either points to the memory location where the scheduling parameters of thread are returned (get function)
or it specifies the new scheduling parameters for thread (set function).
DESCRIPTION
These functions allow the scheduling policy and associated parameters of threads within a multithreaded process to be retrieved and
changed. The legal values for the scheduling policy and associated scheduling parameters are defined in
changes the scheduling policy and associated scheduling parameters for thread to the policy and the associated parameters provided in pol-
icy and param, respectively. On HP-UX, appropriate privileges are required to change the scheduling parameters of a thread. The calling
process must have appropriate privileges or be a member of a group having access to successfully call
The function retrieves the scheduling policy and associated parameters for thread and stores those values in policy and param, respec-
tively. The values returned represent the actual scheduling values, not any temporary values that may be in effect due to priority inheri-
tance or priority ceiling features.
Notes
For the and scheduling policies, only the sched_priority member of the structure is required in the associated scheduling parameters. All
other scheduling policies have implementation-defined scheduling policies. Refer to the documentation for rtsched(2) and for further
information on implementation-defined scheduling policies.
RETURN VALUE
Upon successful completion, and return zero. Otherwise, an error number is returned to indicate the error (the variable is not set).
ERRORS
If any of the following occur, the and functions return the corresponding error number:
is not defined and these functions are not supported.
For each of the following conditions, if the condition is detected, the function returns the corresponding error number:
policy or one of the scheduling parameters in param is invalid.
Either the policy or scheduling parameters contain an
unsupported value.
The caller does not have permission to set either the
scheduling policy specified in policy or the scheduling parameters specified in param for thread.
No thread could be found corresponding to
thread.
For each of the following conditions, if the condition is detected, the function returns the corresponding error number:
No thread could be found corresponding to
thread.
The value specified by
policy or param is invalid.
AUTHOR
and were derived from the IEEE POSIX P1003.1c standard.
SEE ALSO pthread_attr_setschedparam(3T), pthread_attr_setschedpolicy(3T), pthread_attr_getschedparam(3T), pthread_attr_getschedpolicy(3T),
rtsched(2).
STANDARDS CONFORMANCE
Pthread Library pthread_getschedparam(3T)