CPU Usage at another Compute Node?

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07-20-2007

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CPU Usage at another Compute Node?

Hi,

I am trying to get the cpu usage of a job/process. The machine that has these jobs is a cluster with 1 master node and 10 compute nodes.

Now, the complexity is that not all jobs are on the master node. So, in order to get the cpu usage of a job at another node, I have to ssh into it and then use the ps command with the process id. The problem is that it takes atleast 3.5 seconds to ssh into one of the compute nodes. Using the ps command after that will cause the cpu usage to have the wrong data, or will have the process expired itself. Is there anything that I can use to get the cpu usage of a process id at another node without having to ssh into it.

Thank you all very much for your time and efforts.

P.S. - Dont know if this matters, but just thought I would give some additional info for Python users. I am using these commands in a Python script, by importing the os class, and using os.popen() for the "ps" command, and os.execv() for the ssh command.

davidfrank

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LEARN ABOUT SUNOS

atrm

atrm(1) 							   User Commands							   atrm(1)

NAME

       atrm - remove jobs spooled by at or batch

SYNOPSIS

       atrm [-afi] [ [ job  #] [user...]]

DESCRIPTION

       The atrm utility removes delayed-execution jobs that were created with the at(1) command, but have not yet executed. The list of these jobs
       and associated job numbers can be displayed by using atq(1).

       atrm removes each job-number you specify, and/or all jobs belonging to the user you specify, provided that you own the indicated jobs.

       You can only remove jobs belonging to other users if you have solaris.jobs.admin privileges.

OPTIONS

       The following options are supported:

       -a	All. Removes all unexecuted jobs that were created by the current user. If invoked by the privileged user, the entire  queue  will
		be flushed.

       -f	Force.	All information regarding the  removal of the specified jobs is suppressed.

       -i	Interactive. atrm asks if a job should be removed. If you respond with a y, the job will be removed.

FILES

       /var/spool/cron/atjobs	       spool area for at jobs

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

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

SEE ALSO

       at(1), atq(1), auths(1), cron(1M), auth_attr(4), attributes(5)

SunOS 5.10							    13 Aug 1999 							   atrm(1)