pbind(1M)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPERANDS | EXAMPLES | ATTRIBUTES | EXIT STATUS | SEE ALSO | DIAGNOSTICS

NAME

pbind- control and query bindings of processes to processors

SYNOPSIS

pbind -b processor_id pid...
pbind -u pid...
pbind [-q] [pid...]

DESCRIPTION

pbind controls and queries bindings of processes to processors. pbind binds all the LWPs (lightweight processes) of a process to a processor, or removes or displays the bindings.

When an LWP is bound to a processor, it will be executed only by that processor except when the LWP requires a resource that is provided only by another processor. The binding is not exclusive, that is, the processor is free execute other LWPs as well.

Bindings are inherited, so new LWPs and processes created by a bound LWP will have the same binding. Binding an interactive shell to a processor, for example, binds all commands executed by the shell.

Superusers may bind or unbind any process, and other users can use pbind to bind or unbind any process for which the user has permission to signal, that is, any process that has the same effective user ID as the user.

OPTIONS

The following options are supported:

-b processor_id

Binds all the LWPs of the specified processes to the processor processor_id. Specify processor_id as the processor ID of the processor to be controlled or queried. processor_id must be present and on-line. Use the psrinfo command to determine whether or not processor_id is present and on-line. See psrinfo(1M).

-q

Displays the bindings of the specified processes, or of all processes. If a process is composed of multiple LWPs, which have different bindings, the bindings of only one of the bound LWPs will be displayed.

-u

Removes the bindings of all LWPs of the specified processes, allowing them to be executed on any on-line processor.

OPERANDS

The following operands are supported:

pid

The process ID of the process to be controlled or queried.

EXAMPLES

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Example 1




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Binding processes

The following example binds processes 204 and 223 to processor 2.

example% pbind -b 2 204 223

This command displays the following output:

process id 204: was 2, now 2 process id 223: was 3, now 2

Unbinding a process

The following example unbinds process 204.

example% pbind -u 204

Querying Bindings

The following example demonstrates that process 1 is bound to processor 0, process 149 has at least one LWP bound to CPU3, and process 101 has no bound LWPs.

example% pbind -q 1 149 101

This command displays the following output:

process id 1: 0 process id 149: 3 process id 101: not bound

ATTRIBUTES

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWcsu

EXIT STATUS

The following exit values are returned:

0

Successful completion.

>0

An error occurred.

SEE ALSO

psradm(1M), psrinfo(1M), psrset(1M), processor_bind(2), processor_info(2), sysconf(3C), attributes(5)

DIAGNOSTICS

pbind: cannot query pid 31: No such process

The process specified did not exist or has exited.

pbind: cannot bind pid 31: Not owner

The user does not have permission to bind the process.

pbind: cannot bind pid 31: Invalid argument

The specified processor is not on-line.

SunOS 5.9  Last Revised 10 Jan 1997

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPERANDS | EXAMPLES | ATTRIBUTES | EXIT STATUS | SEE ALSO | DIAGNOSTICS