PSET_GETLOADAVG(3C) Standard C Library Functions 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, averaged
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(7) for descriptions of the following attributes:
+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Stable |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+
SEE ALSO
uptime(1),
w(1),
pset_bind(2),
pset_create(2),
Kstat(3PERL),
attributes(7),
prstat(8),
psrset(8) June 28, 2004
PSET_GETLOADAVG(3C)