Re: [HTCondor-users] A GPU server configuration using HTCondor

[John M Knoeller <johnkn@xxxxxxxxxxx>]

Cpus=0 is effectively shorthand for Cpus=all

there is no way to assign a slot to have 0 cpus, since there is no way to run a program that uses doesnât use the CPU.

Also, HTcondor currently doesnât support fractional cpus.  so the minimum you can assign is cpus=1

 

If you want to have one slot with a GPU and minimal, cpu and

another slot with all of the cpus and no GPU, then you would do something like this.

 

cpus = $(DETECTED_CPUS)+1

 

# this gets 1 âbonusâ cpu, since we declared cpus to be detected+1

# we expect the cpu usage to be minimal.

slot_type_1_partitionable = false

slot_type_1 = cpus=1, mem=20000, gpus=1

 

# This will get the remainder after 1 cpu and 20000 memory are carved off.

slot_type_2_partitionable = true

 

From: HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] On Behalf Of Ali Rajabi
Sent: Thursday, June 7, 2018 8:15 PM
To: htcondor-users@xxxxxxxxxxx
Subject: [HTCondor-users] A GPU server configuration using HTCondor

 

Hi everyone,

 

I am trying to configure HTCondor to be able to submit jobs to a GPU server. The jobs will only need to run on GPUs, but the way I have defined each slots, all CPU threads are also available and Condor distribute the process on all CPUs as well as GPUs. 

 

I have 6 GPUs and defined 6 different slots as:

 

slot_type_1_partitionable = false

slot_type_1 = cpus=0, mem=20000, gpus=1

num_slots_type_1 = 1

 

It looks like Condor overrides the "cpus=0" part and make all 32 CPU threads available to the jobs I submit.

 

I would appreciate if anyone could help me make Condor ignore CPUs all together.

 

Best Regards,

Ali