[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [HTCondor-users] limit the number of CPUS based on memory

The Cpus value can be an integer.  But keep in mind that you can do
arbitrary math by using the $INT() or $REAL() macro expansions. 

So, for instance you can use the classad min function to make sure that you 
configure at least 2 GB per core in the slot, but don't go over the actual number of cpus.

# the CPUs calculation 
cpus_per_2gb = min( {$(DETECTED_CORES), $(DETECTED_MEMORY) / 2048} )

# we evaluate the CPUs calculation to an integer when $INT() is expanded


From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of jcaballero.hep@xxxxxxxxx <jcaballero.hep@xxxxxxxxx>
Sent: Tuesday, April 20, 2021 9:43 AM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: [HTCondor-users] limit the number of CPUS based on memory

I guess this is mostly a question about arithmetic with classads :)

So I am wondering if, in order to provide for as many cores as
possible to run jobs that use 2 GB of mem max, I can do something like


Question 1: can cpus here be an integer, or must be a percentage?
Question 2: if it can be an integer, would that be the right _expression_?

HTCondor-users mailing list
To unsubscribe, send a message to htcondor-users-request@xxxxxxxxxxx with a
subject: Unsubscribe
You can also unsubscribe by visiting

The archives can be found at: