man/man8/psrinfo.8

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 PSRINFO 8 "Apr 25, 2019"
 NAME
psrinfo - displays information about processors
 SYNOPSIS

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


psrinfo -t [-S state | -c | -p]


psrinfo -r [<propname> | all]


 DESCRIPTION

psrinfo displays information about processors. Each physical socket may
contain multiple cores, which in turn can contain multiple virtual processors
(also referred to as CPUs). Each virtual processor is an entity
with its own ID, capable of executing independent threads.

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, disabled, or powered off, and
when that status last changed. Use the processor_id operand to display
information about a specific processor. See OPERANDS.
 OPTIONS

The following options are supported:
-c

When used with -t, report the total number of CPU cores.


-p

Display the number of physical sockets in a system.
When combined with the -v option, reports additional information about
each physical socket.


-r propname

Report CPU-specific properties that apply to the system as a whole. Supplying
"all" will list all such properties in key=value format. Currently, the
only defined property is smt_enabled, a boolean property indicating whether
simultaneous multi-threading (hyper-threading) is active or not.


-S state

When used with -t, report the total number of CPUs in the given state.


-s processor_id

Silent mode. Displays 1 if the specified processor is fully on-line,
or 0 otherwise.
Use silent mode when using psrinfo in shell scripts.


-t

Report totals. Without arguments, reports the total number of CPUs. This can be
combined with the -p, -c, or -S options to modify the total.


-v

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.


 OPERANDS

The following operands are supported:
processor_id

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).
This cannot be specified along with the -r or -t options.


 EXAMPLES

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 ]
then
 echo "processor 3 is up"
fi


Example 3 Displaying Information About the Physical Sockets in the
System

Use the -tp options to report the number of sockets.

> psrinfo -tp
 2


Without the -t option, -p also takes processor IDs:

> psrinfo -p 0 28 # IDs 0 and 28 exist on the
1 # same socket

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


In this example, virtual processors 0 and 28 exist on the same
socket. Virtual processors 0 and 1 do not. This is
specific to this example and is and not a general rule.

 EXIT STATUS

The following exit values are returned:
0

Successful completion.


>0

An error occurred.


 SEE ALSO

 p_online (2),  processor_info (2),  attributes (7),  psradm (8)  DIAGNOSTICS
psrinfo: processor 9: Invalid argument

The specified processor does not exist.