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<p class="MsoNormal">I’ve hit an issue with binding using slurm 21.08.5 that I’m hoping someone might be able to help with. I took a scan through the e-mail list but didn’t see this one - apologies if I missed it. Maybe I just need a better understanding
on why this is happening but feels like a bug. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The issue is that if I include the hint=nomultithread to an salloc (or sbatch) it seems to break the binding for the srun within it. Works find if it is a direct srun.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here are the examples of running the sruns directly and things look good:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">~> srun -n 4 -N 1 --ntasks-per-node=4 --cpu_bind=v,map_cpu:0,16,32,48 /bin/true<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 0 0 [103837]: mask 0x1 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 1 1 [103838]: mask 0x10000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 2 2 [103839]: mask 0x100000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 3 3 [103840]: mask 0x1000000000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">~> srun --hint=nomultithread -n 4 -N 1 --ntasks-per-node=4 --cpu_bind=v,map_cpu:0,16,32,48 /bin/true<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 0 0 [103992]: mask 0x1 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 1 1 [103993]: mask 0x10000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 2 2 [103994]: mask 0x100000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 3 3 [103995]: mask 0x1000000000000 set<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And here are the sruns wrapped by an salloc:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">~> salloc --exclusive -N 1 -n 4 srun -n 4 -N 1 --ntasks-per-node=4 --cpu_bind=v,map_cpu:0,16,32,48 /bin/true<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Granted job allocation 282077<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Waiting for resource configuration<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Nodes cn4 are ready for job<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 0 0 [169441]: mask 0x1 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 1 1 [169442]: mask 0x10000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 2 2 [169443]: mask 0x100000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MAP - cn4, task 3 3 [169444]: mask 0x1000000000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Relinquishing job allocation 282077<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">~> salloc --hint=nomultithread --exclusive -N 1 -n 4 srun -n 4 -N 1 --ntasks-per-node=4 --cpu_bind=v,map_cpu:0,16,32,48 /bin/true<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Granted job allocation 282078<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Waiting for resource configuration<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Nodes cn4 are ready for job<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 0 0 [169586]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 1 1 [169587]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 2 2 [169588]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 3 3 [169589]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Relinquishing job allocation 282078<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I do see that the binding has changed to cpu-bind=MASK. Maybe that is a clue.
<span style="font-family:Wingdings">J</span> Even if I send in a mask, mine is not fully used in the presence of the hint:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">~> salloc --exclusive -N 1 -n 4 srun -n 4 -N 1 --ntasks-per-node=4 --cpu_bind=v,mask_cpu:0x1,0x1000,0x100000000,0x1000000000000 /bin/true<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Granted job allocation 282084<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Waiting for resource configuration<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Nodes cn4 are ready for job<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 0 0 [125303]: mask 0x1 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 1 1 [125304]: mask 0x1000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 2 2 [125305]: mask 0x100000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 3 3 [125306]: mask 0x1000000000000 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Relinquishing job allocation 282084<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">~> salloc --hint=nomultithread --exclusive -N 1 -n 4 srun -n 4 -N 1 --ntasks-per-node=4 --cpu_bind=v,mask_cpu:0x1,0x1000,0x100000000,0x1000000000000 /bin/true<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Granted job allocation 282085<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Waiting for resource configuration<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Nodes cn4 are ready for job<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 0 0 [125462]: mask 0x1 set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 1 1 [125463]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 2 2 [125464]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">cpu-bind=MASK - cn4, task 3 3 [125465]: mask 0xf0000000000000000000000000000000f set<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">salloc: Relinquishing job allocation 282085<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Note that the mask is ignored for tasks 1, 2, and 3 in this latter case. Pretty sure my syntax is correct as it worked in the first test without the hint. I also have 22.05.0 installed but not active. I’ll try it with that later today
and report the results.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Brent<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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