pbind(1M)						  System Administration Commands						 pbind(1M)

NAME

       pbind - control and query bindings of processes or LWPs

SYNOPSIS

       pbind -b processor_id pid [/lwpid]...

       pbind [-q] [pid [/lwpid]]...

       pbind -Q [processor_id]...

       pbind -u pid [/lwpid]...

       pbind -U [processor_id]...

DESCRIPTION

       pbind  controls	and queries bindings of processes and LWPs (lightweight processes) to processors. pbind can also remove processor bindings
       that were previously established.

       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 to 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 pro-
       cessor, for example, binds all commands executed by the shell.

       Superusers may bind or unbind any process or LWP, while other users can bind or unbind any process or LWP for which they have 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 or a subset of 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 and the LWPs are not explicitly specified, the bindings of only one of the bound LWPs will be displayed.  The  bindings  of  a
	   subset  of LWPs can be displayed by appending "/lwpids" to the process IDs. Multiple LWPs may be selected using "-" and "," delimiters.
	   See EXAMPLES.

       -Q

	   Displays the LWPs bound to the specified list of processors, or all LWPs with processor bindings. For processes  composed  of  multiple
	   LWPs, the bindings of individual LWPs will be displayed.

       -u

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

       -U

	   Removes the bindings of all LWPs bound to the specified list of processors, or to any processor if no argument is specified.

OPERANDS

       The following operands are supported:

       pid

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

       lwpid

	   The set of LWP IDs of the specified process to be controlled or queried. The syntax for selecting LWP IDs is as follows:

	     2,3,4-8	   LWP IDs 2, 3, and 4 through 8
	     -4 	   LWPs whose IDs are 4 or below
	     4- 	   LWPs whose IDs are 4 or above

       processor_id

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

EXAMPLES

       Example 1 Binding Processes

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

	 example% pbind -b 2 204 223
	 process id 204: was 2, now 2
	 process id 223: was 3, now 2

       Example 2 Unbinding a Process

       The following example unbinds process 204:

	 example% pbind -u 204

       Example 3 Querying Bindings

       The  following  example queries bindings. It 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
	 process id 1: 0
	 process id 149: 3
	 process id 101: not bound

       Example 4 Querying LWP Bindings

       The following example queries bindings of LWPs. It demonstrates that LWP 1 of process 149 is bound to CPU3, and LWP 2 of process 149 is not
       bound.

	 example% pbind -q 149/1-2
	 lwp id 149/1: 3
	 lwp id 149/2: not bound

       Example 5 Querying LWP Bindings for Processor 2:

       The following example queries all LWPs bound to processor 2:

	 example% pbind -Q 2
	 lwp id 149/4: 2
	 lwp id 149/5: 2

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 5.11							    25 Feb 2008 							 pbind(1M)