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psrinfo(8)
System Administration Commands psrinfo(8)
NAME
psrinfo - displays information about processors
SYNOPSIS
psrinfo [-p] [-v] [processor_id]...
psrinfo [-p] -s processor_id
psrinfo -t [-L]
DESCRIPTION
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
threads.
Without the processor_id operand, psrinfo displays one line for each
configured processor, displaying whether it is on-line, non-interrupt‐
ible (designated by no-intr), spare, off-line, faulted or powered off,
and when that status last changed. Use the processor_id operand to dis‐
play information about a specific processor. See OPERANDS.
OPTIONS
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 pro‐
cessor is non-interruptible, spare, off-line,
faulted or powered off.
Use silent mode when using psrinfo in shell scripts.
-p Display the number of physical processors in a sys‐
tem.
When combined with the -v option, reports additional
information about the physical layout of the physi‐
cal processor. The additional information also gives
which virtual CPUs are contained in a processor
socket or core. Typically, a physical processor
plugs into a socket and socket is often used to
refer to a physical processor. Each physical proces‐
sor usually contains some number of cores which each
contain one or more virtual CPUs that can each exe‐
cute instructions.
These physical groupings of virtual CPUs may have
some performance relevant shared hardware components
such as execution pipeline, FPU, cache, or pipe to
memory. However, these performance relevant shared
hardware components may not necessarily be inferred
across different physical processors. Also, one can‐
not necessarily infer which CPUs are in a Non Uni‐
form Memory Access (NUMA) node from physical group‐
ings. To see the NUMA configuration, refer to the
lgrpinfo(1) man page. For more information, see the
pginfo(8) man page.
-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 dis‐
plays unknown.
When combined with the -p option, reports additional
information about each physical processor.
-t Tree mode. Displays a tree of the system's proces‐
sors and their associated socket, core, and cpu ids.
-L Locality group mode. Annotates output with lgroup
membership information. Must be used with -t option.
OPERANDS
The following operands are supported:
processor_id The processor ID of the processor about which informa‐
tion 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 com‐
bine ranges and (individual or multiple) processor_ids
(for example, 1-3 5 7-8 9).
EXAMPLES
Example 1 Displaying Information About All Configured Processors in
Verbose Mode
The following example displays information about all configured proces‐
sors 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 Processors in the
System
With no additional arguments, the -p option displays a single integer:
the number of physical processors in the system:
> psrinfo -p
8
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 physi‐
cal processor. 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.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Availabilitysystem/core-os
SEE ALSO
lgrpinfo(1), p_online(2), processor_info(2), attributes(7), psradm(8),
pginfo(8)
DIAGNOSTICS
psrinfo: processor 9: Invalid argument
The specified processor does not exist.
Oracle Solaris 11.4 27 Sept 2016 psrinfo(8)