Hello, Thank you for your answers.
I did not succeed to make the faq proposal (Question 30 note). I think I succeeded by cheating like this: NodeName=DEFAULT Boards=1 SocketsPerBoard=2 CoresPerSocket=36 ThreadsPerCore=1 RealMemory=128000 Regards. Jean-Mathieu > De: "Doug Meyer" <dame...@raytheon.com> > À: "Slurm User Community List" <slurm-users@lists.schedmd.com> > Envoyé: Jeudi 2 Mai 2019 16:15:30 > Objet: Re: [slurm-users] How should I do so that jobs are allocated to the > thread and not to the core ? > Had same problem in slurm 15, not sure if it affects newer versions. Don’t use > the expanded node definition > NodeName = DEFAULT Boards = 1 SocketsPerBoard = 2 CoresPerSocket = 18 > ThreadsPerCore = 2 RealMemory = 128000 > Use the simpler > NodeName=DEFAULT Cores=36 RealMemory = 128000 > Slurm will use both logical threads and not just the physical. > Doug > “To err is human – and to blame it on a computer is even more so.” Robert > Orben > From: slurm-users <slurm-users-boun...@lists.schedmd.com> On Behalf Of > Benjamin > Redling > Sent: Thursday, May 2, 2019 3:49 AM > To: Slurm User Community List <slurm-users@lists.schedmd.com> > Subject: [External] Re: [slurm-users] How should I do so that jobs are > allocated > to the thread and not to the core ? > Have you Seen the slurm FAQ? > You may want to search on that site for "Hyperthreading" > (Sorry for the TOFU. vacation, mobile) > Am 30. April 2019 18:07:03 MESZ schrieb Jean-mathieu CHANTREIN < [ > mailto:jean-mathieu.chantr...@univ-angers.fr | > jean-mathieu.chantr...@univ-angers.fr ] >: >> Hello, >> Most jobs of my users are single-thread. I have multithreaded processors. The >> jobs seem to reserve 2 logical CPU (1 core=2 CPU (2 threads)) whereas it only >> uses 1 logical CPU(1 thread). Nevertheless, my slurm.conf file indicates: >> [...] >> SelectType = select / cons_res >> SelectTypeParameters = CR_CPU >> FastSchedule = 1 >> [...] >> NodeName = DEFAULT Boards = 1 SocketsPerBoard = 2 CoresPerSocket = 18 >> ThreadsPerCore = 2 RealMemory = 128000 >> And here is an excerpt from the output of a job running on this type of node: >> $ scontrol show job idjob >> [...] >> NumNodes=1 NumCPUs=1 NumTasks=1 CPUs/Task=1 ReqB:S:C:T=0:0:*:* >> TRES=cpu=1,mem=200M,node=1,billing=1 >> Socks/Node=* NtasksPerN:B:S:C=0:0:*:* CoreSpec=* >> MinCPUsNode=1 MinMemoryCPU=200M MinTmpDiskNode=0 >> Features=(null) DelayBoot=00:00:00 >> OverSubscribe=OK Contiguous=0 Licenses=(null) Network=(null) >> But with [ https://github.com/OleHolmNielsen/Slurm_tools/tree/master/pestat | >> pestat >> ] , I can see my node use 72/72 CPU but have only 36 job running like this >> one. >> How should I do so that jobs are allocated to the thread and not to the core >> ? >> Best regards. >> Jean-Mathieu > -- > Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet.
