Ticket 3032

Summary:	Intel MPI under 16.05
Product:	Slurm	Reporter:	Ade <ade.fewings>
Component:	User Commands	Assignee:	Jacob Jenson <jacob>
Status:	RESOLVED WONTFIX	QA Contact:
Severity:	6 - No support contract
Priority:	---
Version:	16.05.4
Hardware:	Linux
OS:	Linux
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Description Ade 2016-08-30 05:26:50 MDT

Noted a small issue in the behaviour of all versions of Intel MPI (4.1 - 5.1) with Slurm since upgrading to 16.05 from 15.08.  Specifically, if specifying  '--ntasks-per-node' and '--ntasks', we seem to always get a warning from srun:

srun: Warning: can't honor --ntasks-per-node set to 16 which doesn't match the requested tasks 1 with the number of requested nodes 1.  Ignoring --ntasks-per-node.

...which appears to suggest that the job specs are not being passed correctly through to Intel MPI's mpiexec.hydra for job launching, which in turn I think calls srun?

Mentioned this on slurm-dev and one other user confirmed they see the same, and that they also -cpus-per-task is not doing what it should when using OpenMPI, although I haven't tested that.

Comment 1 Jacob Jenson 2017-11-03 15:01:58 MDT

Before this ticket can be sent to the support team we need to put a support contract in place for your site. Please let me know if you would like to discuss Slurm support.

Comment 2 Ade 2017-11-03 15:02:10 MDT

Hello

I'm on annual leave on Friday 3rd November, so will respond next week!

Urgent Support issues should go to the Support Desk support@hpcwales.co.uk

Cheers

Ade

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