After your job has completed - determining cumulative core efficiency

Assumptions

See Assumptions - same as for running jobs.

Preliminary: tools available

LONI clusters

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

• seff (See ​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

foo