Re: [HTCondor-users] slot class with reduced cpu weight possible for backfilling?

[Greg Thain <gthain@xxxxxxxxxxx>]

Hi Thomas:

Yes, this is possible, and we have at least one user who does this to 
co-schedule very low latency, high priority jobs next to long running 
batch jobs. See:

https://htcondor.readthedocs.io/en/latest/admin-manual/configuration-macros.html#condor-procd-configuration-file-macros


(Scroll down to BASE_CGROUP)

-greg


On 11/9/23 8:00 AM, Thomas Hartmann wrote:
> Hi all,
>
> is there a way to define a new dynamic slot, whose cpu weighting has a 
> different weight than a parallel standard dynamic slot?
> I.e., a dedicated slot whose dynamic sub-slots have a minimal cpu 
> share - so one can run low prio background jobs on these for jumping 
> on free cycles?
>
> In cgroups v1 the idea would aim to something in the direction like [1].
> With cgroups v2 it might be similar, but I am not yet as firm with v2 
> yet...
>
> Is this possible? (avoiding trying to set up a second low-prio startd 
> with a dedicated cgroup base dir with weights - in parallel to a 
> vanilla startd)
>
> Cheers,
> Â Thomas
>
> [1]
>
> [normal slots]
> condor_var_lib_condor_execute_slot1_1@xxxxxxxx/cpu.shares
> 100
> condor_var_lib_condor_execute_slot1_2@xxxxxxxx/cpu.shares
> 800
>
>
> [low weight slots]
> condor_var_lib_condor_execute_slot2_1@xxxxxxxx/cpu.shares
> 5
> condor_var_lib_condor_execute_slot2_2@xxxxxxxx/cpu.shares
> 5
>
> or ideally a sub-sub-group?
>
> slot2@xxxxxxxx/cpu.shares
> [10]
> slot2@xxxxxxxx/slot2_1/cpu.shares
> [100]
> slot2@xxxxxxxx/slot2_2/cpu.shares
> [100]
>
>
>
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