psrinfo(1M)						  System Administration Commands					       psrinfo(1M)

NAME

       psrinfo - displays information about processors

SYNOPSIS

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

       psrinfo [-p] -s processor_id

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
       display 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  processor  is	non-inter-
		       ruptible, 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 system.

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

       -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 (indi-
		       vidual 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 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 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 physical 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(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

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

DIAGNOSTICS

       psrinfo: processor 9: Invalid argument

	   The specified processor does not exist.

SunOS 5.10							    21 Feb 2004 						       psrinfo(1M)