Exercise session 15: Omniperf

Exercise assignments can be found in the AMD exercise notes, section on Omniperf.

Exercise files can be copied from Exercises/AMD/HPCTrainingExamples.

Materials

Materials on the web:

• AMD exercise assignments and notes

  PDF backup and local web backup.

• Exercise files: Download as .tar.bz2 or download as .tar

Archived materials on LUMI:

• Exercise assignments PDF: /appl/local/training/4day-20231003/files/LUMI-4day-20231003-Exercises_AMD.pdf

• Exercise files: /appl/local/training/4day-20231003/files/LUMI-4day-20231003-Exercises_AMD.tar.bz2 or /appl/local/training/4day-20231003/files/LUMI-4day-20231003-Exercises_AMD.tar

Q&A

1. When I try executing commands from the first hackmd.io link, this is what I get:

   salloc -N 1 --ntasks=1 --partition=small-g --gpus=1 -A project_465000644 --time=00:15:00 salloc: error: Job submit/allocate failed: Requested node configuration is not available salloc: Job allocation 4701325 has been revoked.

   • could you source /project/project_465000644/Exercises/HPE/lumi_g.sh . It could be that you run the lumi_c.sh script which sets some variables that could clash with the salloc.

   Yes, I did source the lumi_g.sh

   • OK. I checked the lumi_g.sh script and even the environment variables that it sets influence salloc in a way that creates conflicts with your command line. So the trick is to log in again and not source any of those scripts and then the salloc line will work, but you will not be working in the reservation, or to not add the -A and --partition argument as they are set by environment variables. What is actually happening is that because of the enviornment variables the reservation is activated but you're asking for nodes outside the reservation.

   Yes, it works when not sourcing anything. Is the salloc in the linked document really needed and it wouldn't be better to forgo it and just use the reservation?