Learning Forum

[comiskeyp]

Hello,

I'm having an issue running Fluent using HPC resources and it appears to be related to the processor affinity. I'm using Slurm as a scheduler, have followed these instructions on the forum, and can launch Fluent on the HPC when there are no other jobs on the node. However, I run into issues when requesting resources that require multiple nodes, and I believe that it may be due to the default behavior of Fluent requesting to be run on nodes exclusively. Specifically, my .slurm file which gets created when I submit a job looks like the following:

Investigating the processor affinity resolution document on the forum, and reading the 24R2 User's Manual, it appears that the "--exclusive" flag may be the issue. This can be altered with the environment variable "FLUENT_AFFINITY=" according to Section 4.1.2.6 in the User's Manual, however, whatever I type into the Environment tab of the Fluent launcher appears to be ignored when Fluent is launched. In other words, I can't seem to change the affinity with the Fluent launcher. Additionally, it seems like anything, not just a command that I type into the Environment tab seems to be ignored when Fluent is launched. Note that I'm not changing Windows environment variables in addition to typing in the Environment tab of the Fluent Launcher.

Does anyone have ideas or experience with getting the Fluent Launcher to use what's typed in the Environment tab, or how to change the affinity?

Thanks