[slurm-users] Optimizing CPU allocation in Slurm with hyperthreading enabled

2025-01-30 Thread Guillaume COCHARD via slurm-users
Hello, The Slurm documentation states that "The default allocation method within a node is cyclic allocation (allocate available CPUs in a round-robin fashion across the sockets within a node)." In our case, we are using hyperthreading, which means that if two jobs requesting one CPU each arr

[slurm-users] Re: Max TRES per user and node

2024-09-25 Thread Guillaume COCHARD via slurm-users
usrPTphKaUagFzfF9CNo5WYMHOY2GiJMGbhNaCs2qKMrSxpgxSthUZDwCq16zeU03xps1Ar3le5oNqse4SbMDbfEd8anRGRFFhqXTVqHukHok4YQdNAXzQvUG4oI_J5hd11IrO6QMK-jdaUqH3BT1SCR9J4wzbDgUQPsYzZLmhvUjNs7R5Ok5uDUTWbyIUCFgbvDj-/http%3A%2F%2Fwww.dkrz.de%2F> > > Geschäftsführer: Prof. Dr. Thomas Ludwig > Sitz der Gesell

[slurm-users] Re: Max TRES per user and node

2024-09-24 Thread Guillaume COCHARD via slurm-users
as a QOS parameter. You can create a QOS with the restrictions you'd like, and then in the partition definition, you give it that QOS. The QOS will then apply its restrictions to any jobs that use that partition. Rob From: Guillaume COCHARD via slurm-users Sent: Tuesday, September 2

[slurm-users] Re: Max TRES per user and node

2024-09-24 Thread Guillaume COCHARD via slurm-users
partition definition, you give it that QOS. The QOS will then apply its restrictions to any jobs that use that partition. Rob From: Guillaume COCHARD via slurm-users Sent: Tuesday, September 24, 2024 9:30 AM To: slurm-users@lists.schedmd.com Subject: [slurm-users] Max TRES per user and

[slurm-users] Max TRES per user and node

2024-09-24 Thread Guillaume COCHARD via slurm-users
Hello, We are looking for a method to limit the TRES used by each user on a per-node basis. For example, we would like to limit the total memory allocation of jobs from a user to 200G per node. There is MaxTRESperNode (https://slurm.schedmd.com/sacctmgr.html#OPT_MaxTRESPerNode), but unfortuna

[slurm-users] Incorrect hyperthreading with Slurm 23.11

2024-03-27 Thread Guillaume COCHARD via slurm-users
Hello, We have upgraded our cluster to Slurm 23.11.1 then, a few weeks later, to 23.11.4. Since then, Slurm doesn't detect hyperthreaded CPUs. We have downgraded our test cluster, the issue is not present with Slurm 22.05 (we had skipped Slurm 23.02). For example, we are working with this node