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
#include <pthread.h>
int pthread_gettimeslice_np(
int *tslice
);
int pthread_settimeslice_np(
int tslice
);
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.
pthread_settimeslice_np()
sets the timeslice value to
tslice
for all timeshare process scope threads
in the process.
pthread_gettimeslice_np()
retrieves the process' timeslice value.
tslice
may range between 0 and
PTHREAD_MAXTSLICE_NP.
RETURN VALUE
pthread_gettimeslice_np()
returns the current timeslice value in
tslice.
Upon successful completion,
pthread_settimeslice_np()
returns zero. Otherwise, an error number is returned to indicate the error
(the
errno
variable is not set).
ERRORS
If any of the following occur, the
pthread_settimeslice_np()
function returns the following error number:
- [EINVAL]
The timeslice value was negative or greater than
PTHREAD_MAXTSLICE_NP.
WARNINGS
Setting the timeslice value lesser than the default
timeslice value may cause a performance deterioration.
AUTHOR
pthread_settimeslice_np()
and
pthread_gettimeslice_np()
were developed by HP.
STANDARDS CONFORMANCE
pthread_settimeslice_np(): None.
pthread_gettimeslice_np(): None.
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