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= After your job has completed - determining cumulative core efficiency =

== Assumptions ==
See [wiki:Workshops/JobParallelism/WhileYourJobIsRunning#Assumptions Assumptions] - same as for running jobs.

== Preliminary: tools available ==

=== LONI clusters ===

LONI clusters provide the self-contained commands '''seff''' and '''qshow'''.

  * '''seff''' (See [https://github.com/SchedMD/slurm/tree/master/contribs/seff seff on github].)

  On LONI QB4 cluster:

 {{{
[loniID@qbd2 ~]$ seff -h
Usage: seff [Options] <Jobid>
       Options:
       -h    Help menu
       -v    Version
       -d    Debug mode: display raw Slurm data
[loniID@qbd2 ~]$ seff -v
seff Version 2.1

 }}}

   * '''qshow''' (provided by LONI)

  On LONI QB4 cluster:

 {{{
[loniID@qbd2 ~]$ qshow -h
** usage: qshow -n <options> <base-name> <begin #> <end #> <command>
...
Show and optionally kill user processes on remote nodes or execute
commands...
[loniID@qbd2 ~]$ qshow -v
qshow 2.74
 }}}

=== Cypress ===

 In the following we'll need to use the '''sacct''' command for analyzing completed jobs on Cypress. (Cypress uses an older version of SLURM (v14.03.0) with insufficient support for the seff command.)

 Here are the relevant outputs that we'll need from '''sacct'''.

||='''sacct''' output column=||=Description=||=Format=||
||'''TotalCPU'''||Total core hours used||[DD-[hh:]]mm:ss)||
||'''CPUTimeRAW'''||Total cores hours allocated||Seconds||

== Cumulative core efficency: (total core hours used) / (total core hours allocated ==

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