pset_ctl(2)pset_ctl(2)NAMEpset_ctl() - processor set control
SYNOPSISDESCRIPTION
The function provides a means to query the system processor set config‐
uration and assignment information. The request argument specifies
what information is needed for the pset processor set. The following
request values are supported:
Return the ID of the processor set binding for the calling thread.
The pset and id arguments are ignored.
Return the ID of the first locality domain contributing to the proces‐
sor set
pset. The id argument is ignored.
Return the ID of the first processor in the processor set
pset that is in the proximity of the processor specified by
id. Even when the processor given by id is enabled, the
return value will be -1 if none of the proximate processors
contribute to the processor set pset. If the processor given
by id is not enabled, -1 is returned.
See mpctl(2) for details on proximate processors.
Return the ID of the first processor set in
the system. The pset and id arguments are ignored.
Return the ID of the first processor in the processor set
pset. It will return -1 if the processor set is empty. Any
processors in the processor set that is in transition are
ignored. The id argument is ignored.
Return the ID of the next locality domain after the locality domain
specified in
id that contributes to the processor set pset.
Typically, is called to determine the first locality domain
in a processor set. is then called in a loop (until the call
returns -1) to determine the IDs of the remaining locality
domain in the processor set.
Return the ID of the next processor in the processor set
pset that is in the proximity of the processor specified by
id.
Typically, is called to determine the first proximate proces‐
sor. is then called in a loop (until the call returns -1) to
determine the IDs of the remaining proximate processors.
Return the ID of the next processor set in the system after
pset. The id argument is ignored.
Typically, is called to determine the first processor set.
is then called in a loop (until the call returns -1) to
determine the IDs of the remaining processor sets in the sys‐
tem.
Return the ID of next processor in the processor set
pset after the processor specified in id.
Typically, is called to determine the first processor in a
processor set. is then called in a loop (until the call
returns -1) to determine the IDs of the remaining processors
in the processor set.
Return the number of locality domains that have at least one processor
assigned to the processor set pset. The id argument is
ignored.
Return the number of processors assigned to the processor set
pset that are in the proximity of the processor specified by
id. Even when the processor given by id is enabled, the
return value will be 0 if none of proximate processors con‐
tribute to the processor set pset. If the processor given by
id is not enabled, -1 is returned.
Return the current number of processor sets in the system.
It will always be greater than or equal to one. The pset and
id arguments are ignored.
Return the number of processors assigned to the processor set
pset. Any processors in the processor set that is in transi‐
tion are not included. The id argument is ignored.
Return number of processors contributed by the locality domain speci‐
fied by
id to the processor set pset.
Return the ID of the processor set assigned for the processor specified
in
id. If the processor is not enabled or is in transition from
one processor set to another, -1 is returned with an error.
The pset argument is ignored.
Logical Processor and Processor Core Information
On systems with the Hyper-Threading (HT) feature enabled, each proces‐
sor core may have more than one hyper-thread per physical processor
core. When hyper-threading is enabled at the firmware level, each
hyper-thread is represented to the operating system and applications as
a logical processor (LCPU). Hence the basic unit of any topology
information is a logical processor. However, some applications may
want to get the system topology information at the physical processor
core level.
Returns the number of processor cores assigned to the processor set
pset. Any processor cores in the processor set that are in
transition are not included. The id argument is ignored.
Returns the ID of the first processor core in the processor set
pset. It will return -1 if the processor set is empty. Any
processor cores in the processor set that is in transition
are ignored. The id argument is ignored.
Returns the ID of the next processor core in the processor set
pset after the processor specified in id. Typically, is
called to determine the first processor core in a processor
set. is then called in a loop (until the call returns -1) to
determine the IDs of remaining processor cores in the proces‐
sor set.
Returns the number of enabled processor cores assigned to the processor
set
pset.
Any user may query the system processor set topology using the func‐
tion.
Use with name to see if the processor set functionality is supported by
the underlying HP-UX operating system version.
RETURN VALUE
returns a value based on on successful completion.
Success.
The value is based on the request.
Failure.
is set to indicate the error.
ERRORS
sets to one of the following values if the corresponding condition is
detected.
The request is invalid.
The specified processor set
pset, or the processor or the locality domain spec‐
ified by id is invalid.
The request is and there is no other processor set after pset, or
the request is and there is no other processor
after id in pset, or the request is and there is no
other locality domain after id in pset, or the
request is and there is no other proximate proces‐
sor after id in pset.
The request is or and the processor specified by id is not
enabled.
The processor set functionality is not supported by the
underlying HP-UX version.
EXAMPLES
Get total count and IDs of all processor sets in the system.
AUTHOR
was developed by HP.
SEE ALSOpsrset(1M), mpctl(2), pset_assign(2), pset_bind(2), pset_create(2),
pset_destroy(2), pset_getattr(2), pset_setattr(2), sysconf(2), privi‐
leges(5).
pset_ctl(2)
