[slurm-users] Query regarding energy from TRES in scontrol output

[Ravi Reddy Manumachu]

Dear Slurm Users,

I have a question regarding the energy consumption of a node during
application execution.

Following is the output from a job executed on one node.

============================================================
*$ scontrol show job 13513617*
JobId=13513617 JobName=dgemm
...
   JobState=COMPLETED Reason=None Dependency=(null)
   Requeue=1 Restarts=0 BatchFlag=1 Reboot=0 ExitCode=0:0
   RunTime=00:00:31 TimeLimit=00:30:00 TimeMin=N/A
   SubmitTime=2020-02-06T13:26:35 EligibleTime=2020-02-06T13:26:35
   AccrueTime=2020-02-06T13:26:35
   StartTime=2020-02-06T13:26:36 EndTime=2020-02-06T13:27:07 Deadline=N/A
   SuspendTime=None SecsPreSuspend=0 LastSchedEval=2020-02-06T13:26:36
   Partition=workq AllocNode:Sid=cdl2:17930
   ReqNodeList=(null) ExcNodeList=(null)
   NodeList=nid00024
   BatchHost=nid00024
   NumNodes=1 NumCPUs=64 NumTasks=0 CPUs/Task=1 ReqB:S:C:T=0:0:*:*
*   TRES=cpu=64,mem=128448M,energy=9429,node=1,billing=64*
   Socks/Node=* NtasksPerN:B:S:C=0:0:*:* CoreSpec=*
   MinCPUsNode=1 MinMemoryCPU=2007M MinTmpDiskNode=0
   Features=(null) DelayBoot=00:00:00
   OverSubscribe=NO Contiguous=0 Licenses=(null) Network=(null)
...
   Power=
============================================================

The Trackable RESources (TRES) line is below:

*   TRES=cpu=64,mem=128448M,energy=9429,node=1,billing=64*

Is the energy displayed here the energy consumption of the node during the
job execution? Could you please tell me how the energy is calculated? Is it
using RAPL or IPMI or external power meters?

Many thanks for your help.

-- 
Kind Regards
Ravi
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