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SunOS man pages : pbind (1)

Maintenance Commands                                    pbind(1M)


pbind - control and query bindings of processes to proces- sors


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


pbind controls and queries bindings of processes to proces- sors. 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 interac- tive 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.


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. SunOS 5.8 Last change: 10 Jan 1997 1 Maintenance Commands pbind(1M)


The following operands are supported: pid The process ID of the process to be controlled or queried.


Example 1: Binding processes The following example binds processes 204 and 223 to proces- sor 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


See attributes(5) for descriptions of the following attri- butes: ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |_____________________________|_____________________________| | Availability | SUNWcsu | |_____________________________|_____________________________|


The following exit values are returned: SunOS 5.8 Last change: 10 Jan 1997 2 Maintenance Commands pbind(1M) 0 Successful completion. >0 An error occurred.


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


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 5.8 Last change: 10 Jan 1997 3