pset_bind

- bind LWPs to a set of processors

Synopsis

#include <sys/pset.h>

int pset_bind(psetid_t pset, idtype_t idtype, id_t id, psetid_t *opset);

Description

The pset_bind() function binds the LWP or set of LWPs specified by idtype and id to the processor set specified by pset. If opset is not NULL, pset_bind() sets the psetid_t variable pointed to by opset to the previous processor set binding of one of the specified LWP, or to PS_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_ZONEID, the binding affects all LWPs of all processes with zone ID id.

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

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

If pset is PS_NONE, the processor set bindings of the specified LWPs are cleared.

If pset is PS_QUERY, the processor set bindings are not changed.

If pset is PS_MYID, the specified LWPs are bound to the same processor set as the caller. If the caller is not bound to a processor set, the processor set bindings are cleared.

The {PRIV_SYS_RES_CONFIG} privilege must be asserted in the effective set of the calling process or pset must be PS_QUERY.

LWPs that have been bound to a processor with processor_bind(2) may also be bound to a processor set if the processor is part of the processor set. If this occurs, the binding to the processor remains in effect. If the processor binding is later removed, the processor set binding becomes effective.

Processor set 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 pset_bind() function will fail if:

EBUSY

One of the LWPs is bound to a processor, and the specified processor set does not include that processor.

EFAULT

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

EINVAL

An invalid processor set ID was specified; or idtype was not P_PID, P_LWPID, P_PROJID, P_TASKID, P_ZONEID, or P_CTID.

ENOTSUP

The pools facility is active. See pooladm(1M) and pool_set_status(3POOL) for information about enabling and disabling the pools facility. Processes can be bound to pools using the poolbind(1M) utility or the pool_set_binding(3POOL) function.

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

EPERM

The {PRIV_PROC_OWNER} is not asserted in the effecive set of the calling process and either the real or effective user ID of the calling process does not match the real or effective user ID of one of the LWPs being bound, or the processor set from which one or more of the LWPs are being unbound has the PSET_NOESCAPE attribute set and {PRIV_SYS_RES_CONFIG) is not asserted in the effective set of the calling process. See pset_setattr(2) for more information about processor set attributes.

ESRCH

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

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

pbind(1M), pooladm(1M), poolbind(1M), psrset(1M), exec(2), fork(2), processor_bind(2), pset_create(2), pset_info(2), pset_setattr(2), pool_set_binding(3POOL), pool_set_status(3POOL), pset_getloadavg(3C), process(4), project(4), attributes(5), privileges(5)