PSET_GETLOADAVG(3C)PSET_GETLOADAVG(3C)NAME
pset_getloadavg - get system load averages for a processor set
SYNOPSIS
#include <sys/pset.h>
#include <sys/loadavg.h>
int pset_getloadavg(psetid_t pset, double loadavg[], int nelem);
DESCRIPTION
The pset_getloadavg() function returns the number of processes assigned
to the specified processor set that are in the system run queue, aver‐
aged over various periods of time. Up to nelem samples are retrieved
and assigned to successive elements of loadavg[]. The system imposes a
maximum of 3 samples, representing averages over the last 1, 5, and 15
minutes, respectively.
The LOADAVG_1MIN, LOADAVG_5MIN, and LOADAVG_15MIN indices, defined in
<sys/loadavg.h>, can be used to extract the data from the appropriate
element of the loadavg[] array.
If pset is PS_NONE, the load average for processes not assigned to a
processor set is returned.
If pset is PS_MYID, the load average for the processor set to which the
caller is bound is returned. If the caller is not bound to a processor
set, the result is the same as if PS_NONE was specified.
RETURN VALUES
Upon successful completion, the number of samples actually retrieved
is returned. If the load average was unobtainable or the processor set
does not exist, −1 is returned and errno is set to indicate the error.
ERRORS
The pset_getloadavg() function will fail if:
EINVAL
The number of elements specified is less than 0, or an
invalid processor set ID was specified.
The caller is in a non-global zone, the pools facility is
active, and the specified processor set is not that of the
zone's pool.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬───────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼───────────────────┤
│Interface Stability │ Stable │
├────────────────────┼───────────────────┤
│MT-Level │ Async-Signal-Safe │
└────────────────────┴───────────────────┘
SEE ALSOuptime(1), w(1), psrset(1M), prstat(1M), pset_bind(2), pset_create(2),
Kstat(3PERL), attributes(5)
Jun 28, 2004 PSET_GETLOADAVG(3C)
