Add test to check that access-counter based page migration is disabled#496
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jgphpc merged 5 commits intoeth-cscs:mainfrom Jan 12, 2026
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Pull request overview
This PR adds a test to verify that the NVIDIA UVM (Unified Virtual Memory) performance access counter migration feature is disabled on GPU systems, as it's known to be buggy in older drivers. Additionally, it fixes the mixin import path in slurm.py.
Changes:
- Fixed the import path for
uenv_slurm_mpi_optionsmixin to correctly navigate fromchecks/system/slurm/tochecks/mixins/ - Added new test
SlurmNoUvmPerfAccessCounterMigrationto check that the NVIDIA UVM parameter is set to 0
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cscs-ci run alps-daint-uenv;MY_UENV=prgenv-gnu/25.11:v1 |
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cscs-ci run alps-beverin-uenv;MY_UENV=prgenv-gnu/25.07-6.3.3:v11 |
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cscs-ci run alps-eiger-uenv;MY_UENV=prgenv-gnu/25.11:v1 |
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Jan 12, 2026
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checked that SlurmNoUvmPerfAccessCounterMigration runs only on cn with /sys/module/nvidia_uvm/...
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Also fixes the mixin path in
slurm.py. Related to https://jira.cscs.ch/browse/PA-1395.This is currently incomplete becase the test runs on all systems. I know how to check with uenv environments if a test is running on a gh200 system, but how do I check the same with the
builtinenvironment? Or do you have other suggestions for skipping the check if the file doesn't exist?