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Full Discussion: Conflicts in the output of TOP command
Top Forums UNIX for Advanced & Expert Users Conflicts in the output of TOP command Post 302751679 by rbatte1 on Friday 4th of January 2013 09:52:35 AM
Old 01-04-2013
This would suggest that you are on a multi-processor system and the process running is multi-threaded to take advantage of the hardware. You will only get up to 100% per processor, but they will be totted up for a multi-thread process.

Do you have 40 processors or more?

The other potential is for a process that is started during the time that top is taking it's sample. If it takes 0.1 seconds for top to collect everything and a process starts after 0.09 seconds but still gets collected, I have seen that skew the figures momentarily.

Perhaps from the command line, you could use vmstat 2 2 at the time and find the CPU counts there for the whole machine. You can also:-
Code:
ps -ef | sort -n +3

... on older unix servers to get the busiest process at the bottom of the list and you can check if it is newly started. The sort would change to:-
Code:
ps -ef | sort -k4


I hope that this helps.

Robin
Liverpool/Blackburn
UK
This User Gave Thanks to rbatte1 For This Post:
anand2308
 

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LEARN ABOUT OSF1

online

psradm(8)						      System Manager's Manual							 psradm(8)

NAME

       psradm, offline, online - Stops and starts processors in a multiprocessor system

SYNOPSIS

       /usr/sbin/psradm -f  [-v] [[-a] [processor_id...]]

       /usr/sbin/psradm -n  [-v] [[-a] [processor_id...]]

       /usr/sbin/online [-v] [processor_id...]

       /usr/sbin/offline [-v] [processor_id...]

OPTIONS

       The following options apply only to the psradm command: Specifies that all the processors except the master processor be put off line or on
       line.  Puts the specified processor off line.  Puts the specified processor on line.

       The following option applies to all forms of the command: Displays a message about the status of the operation performed on each processor.

DESCRIPTION

       On a multiprocessor system, the psradm command puts one or more processors off line (stops a processor) or on line (starts a processor).

       The processor_id variable specifies an integer that uniquely identifies a processor.  Use the psrinfo command to display processor  identi-
       fication numbers.

       The  offline  command puts one or more processors off line (stops a processor).	If no processors are specified, all processors that are on
       line are stopped except the master processor.

       The online command puts one or more processors on line (starts a processor).  If no processors are specified, all processors that  are  off
       line are started.

       Note that you cannot use these commands to start or stop the master processor in a multiprocessor system.

       You must be the root user to use this command.

       The /var/adm/wtmp file contains information about successful processor state transitions.

RESTRICTION

       Do not use the psradm command to disable CPUs when benchmarking performance, because the command does not provide an accurate reflection of
       the performance of a system that actually has fewer CPUs.  Accurate performance results are obtained only when you disable the CPUs at  the
       SRM console command level.

EXAMPLES

       The  following command puts processors 2 and 3 off line: # psradm -f 2 3 The following command puts all the processors on line: # psradm -n
       -a The following command puts all processors on line: # online -v

FILES

SEE ALSO

       Commands: pset_info(1), psrinfo(1)

       Files: processor_sets(4)

																	 psradm(8)
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