PROCESSOR_BIND(2) System Calls PROCESSOR_BIND(2)

NAME

processor_bind - bind LWPs to a processor

SYNOPSIS

#include <sys/types.h>
#include <sys/processor.h>
#include <sys/procset.h>

int processor_bind(idtype_t idtype, id_t id, processorid_t processorid,
processorid_t *obind);

DESCRIPTION

The processor_bind() function binds the LWP (lightweight process) or set
of LWPs specified by idtype and id to the processor specified by
processorid. If obind is not NULL, this function also sets the
processorid_t variable pointed to by obind to the previous binding of one
of the specified LWPs, or to PBIND_NONE if the selected LWP was not
bound.


If idtype is P_PID, the binding affects all LWPs of the process with
process ID (PID) id.


If idtype is P_LWPID, the binding affects the LWP of the current process
with LWP ID id.


If idtype is P_TASKID, the binding affects all LWPs of all processes with
task ID id.


If idtype is P_PROJID, the binding affects all LWPs of all processes with
project ID id.


If idtype is P_CTID, the binding affects all LWPs of all processes with
process contract ID id.


If idtype is P_ZONEID, the binding affects all LWPs of all processes with
zone ID id.


If id is P_MYID, the specified LWP, process, task, or project is the
current one.


If processorid is PBIND_NONE, the processor bindings of the specified
LWPs are cleared.


If processorid is PBIND_QUERY, the processor bindings are not changed.


The {PRIV_PROC_OWNER} privilege must be asserted in the effective set of
the calling process or the real or effective user ID of the calling
process must match the real or effective user ID of the LWPs being bound.
If the calling process does not have permission to change all of the
specified LWPs, the bindings of the LWPs for which it does have
permission will be changed even though an error is returned.


Processor bindings are inherited across fork(2) and exec(2).

RETURN VALUES

Upon successful completion, 0 is returned. Otherwise, -1 is returned and
errno is set to indicate the error.

ERRORS

The processor_bind() function will fail if:

EFAULT
The location pointed to by obind was not NULL and not writable
by the user.


EINVAL
The processor is not on-line.

The LWP is bound to a processor set or resource pool for which
the processor is not a member.

The idtype argument is not P_PID, P_LWPID, P_PROJID, P_TASKID,
P_CTID, or P_ZONEID.


ENOTSUP
Binding a system process to a processor set is not supported.


EPERM
The {PRIV_PROC_OWNER} privilege is not asserted in the
effective set of the calling process and its real or effective
user ID does not match the real or effective user ID of one of
the LWPs being bound.


ESRCH
No processes, LWPs, or tasks were found to match the criteria
specified by idtype and id.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Committed |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+

SEE ALSO

exec(2), fork(2), p_online(2), pset_bind(2), sysconf(3C), process(5),
project(5), attributes(7), privileges(7), pooladm(8), psradm(8),
psrinfo(8), zoneadm(8)

December 27, 2015 PROCESSOR_BIND(2)