PSRINFO(1M) Maintenance Commands PSRINFO(1M)


psrinfo - displays information about processors


psrinfo [-p] [-v] [processor_id]...

psrinfo [-p] -s processor_id


psrinfo displays information about processors. Each physical processor
may support multiple virtual processors. Each virtual processor is an
entity with its own interrupt ID, capable of executing independent

Without the processor_id operand, psrinfo displays one line for each
configured processor, displaying whether it is on-line, non-interruptible
(designated by no-intr), spare, off-line, faulted or powered off, and
when that status last changed. Use the processor_id operand to display
information about a specific processor. See OPERANDS.


The following options are supported:

-s processor_id
Silent mode. Displays 1 if the specified processor is
fully on-line. Displays 0 if the specified processor
is non-interruptible, spare, off-line, faulted or
powered off.

Use silent mode when using psrinfo in shell scripts.

Display the number of physical processors in a system.

When combined with the -v option, reports additional
information about each physical processor.

Verbose mode. Displays additional information about
the specified processors, including: processor type,
floating point unit type and clock speed. If any of
this information cannot be determined, psrinfo
displays unknown.

When combined with the -p option, reports additional
information about each physical processor.


The following operands are supported:

The processor ID of the processor about which information
is to be displayed.

Specify processor_id as an individual processor number
(for example, 3), multiple processor numbers separated by
spaces (for example, 1 2 3), or a range of processor
numbers (for example, 1-4). It is also possible to
combine ranges and (individual or multiple) processor_ids
(for example, 1-3 5 7-8 9).


Example 1: Displaying Information About All Configured Processors in

Verbose Mode

The following example displays information about all configured
processors in verbose mode.

psrinfo -v

Example 2: Determining If a Processor is On-line

The following example uses psrinfo in a shell script to determine if a
processor is on-line.

if [ "`psrinfo -s 3 2> /dev/null`" -eq 1 ]
echo "processor 3 is up"

Example 3: Displaying Information About the Physical Processors in the


With no additional arguments, the -p option displays a single integer:
the number of physical processors in the system:

> psrinfo -p

psrinfo also accepts command line arguments (processor IDs):

> psrinfo -p 0 512 # IDs 0 and 512 exist on the
1 # same physical processor

> psrinfo -p 0 1 # IDs 0 and 1 exist on different
2 # physical processors

In this example, virtual processors 0 and 512 exist on the same physical
processor. Virtual processors 0 and 1 do not. This is specific to this
example and is and not a general rule.


The following exit values are returned:

Successful completion.

An error occurred.


psradm(1M), p_online(2), processor_info(2), attributes(5)


psrinfo: processor 9: Invalid argument

The specified processor does not exist.

February 21, 2004 PSRINFO(1M)