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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello<o:p></o:p></p>
<p class="MsoNormal"> I am trying to debug an issue with EGL support (updated NVIDIA drivers and now EGLGetDisplay and EGLQueryDevicesExt are failing if they can’t access all /dev/nvidia# devices in slurm) and am wondering how slurm uses device cgroups so
I can implement the same cgroup setup by hand and test our issue outside of slurm.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We have slurm 20.02.05 with cgroups set up with Cores, RAMSpace, and devices being constrained.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When I get onto an allocation with 1 of 4 GPUs on the system nvidia-smi only sees the GPU I was assigned and I get permission denied when I try to access the other /dev/nvidia# devices.<o:p></o:p></p>
<p class="MsoNormal">When I look at the cgroup either through the /sys/fs/cgroups/slurm/uid_######/job_#########/step_0 or with the cgget command I see the values for memory.limit_in_bytes and cpuset.cpus being set as expected, but the devices.list value is
set to “a *:* rwm” even though I am being blocked from other devices. The device restriction does seem to working but the cgroup parameters for it are not set as I would expect to see.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How does slurm manage the device cgroup settings on RHEL 7 so I can check and mimic them?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks.<o:p></o:p></p>
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