[slurm-users] How to find core count per job per node

[Jeffrey Frey]

Adding the "--details" flag to scontrol lookup of the job:


$ scontrol --details show job 1636832
JobId=1636832 JobName=R3_L2d
    :
   NodeList=r00g01,r00n09
   BatchHost=r00g01
   NumNodes=2 NumCPUs=60 NumTasks=60 CPUs/Task=1 ReqB:S:C:T=0:0:*:*
   TRES=cpu=60,mem=60G,node=2,billing=55350
   Socks/Node=* NtasksPerN:B:S:C=30:0:*:* CoreSpec=*
     Nodes=r00g01,r00n09 CPU_IDs=0-29 Mem=30720 GRES_IDX=
   MinCPUsNode=30 MinMemoryCPU=1G MinTmpDiskNode=0
   Features=(null) DelayBoot=00:00:00
   Gres=(null) Reservation=(null)
   OverSubscribe=OK Contiguous=0 Licenses=(null) Network=(null)
    :

$ scontrol --details show job 1653838
JobId=1653838 JobName=v1.20
    :
   NodeList=r00g01,r00n[16,20],r01n16
   BatchHost=r00g01
   NumNodes=4 NumCPUs=20 NumTasks=20 CPUs/Task=1 ReqB:S:C:T=0:0:*:*
   TRES=cpu=20,mem=20G,node=4,billing=18450
   Socks/Node=* NtasksPerN:B:S:C=0:0:*:* CoreSpec=*
     Nodes=r00g01 CPU_IDs=31-35 Mem=5120 GRES_IDX=
     Nodes=r00n16 CPU_IDs=34-35 Mem=2048 GRES_IDX=
     Nodes=r00n20 CPU_IDs=12-17,30-35 Mem=12288 GRES_IDX=
     Nodes=r01n16 CPU_IDs=15 Mem=1024 GRES_IDX=
   MinCPUsNode=1 MinMemoryCPU=1G MinTmpDiskNode=0
   Features=(null) DelayBoot=00:00:00
   Gres=(null) Reservation=(null)
   OverSubscribe=OK Contiguous=0 Licenses=(null) Network=(null)
    :



> On Oct 18, 2019, at 1:56 PM, Tom Wurgler <twurgl at goodyear.com> wrote:
> 
> I need to know how many cores a given job is using per node.
> Say my nodes have 24 cores each and I run a 36 way job.
> It take a node and a half.
> scontrol show job id
> shows me 36 cores, and the 2 nodes it is running on.
> But I want to know how it split the job up between the nodes.
> 
> Thanks for any info


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Jeffrey T. Frey, Ph.D.
Systems Programmer V / HPC Management
Network & Systems Services / College of Engineering
University of Delaware, Newark DE  19716
Office: (302) 831-6034  Mobile: (302) 419-4976
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