Re: [HTCondor-users] Running non-gpu job on gpu machine referring Whats_New_condor_week_2023

[John M Knoeller <johnkn@xxxxxxxxxxx>]

SLOT_TYPE_2_START = TARGET.BackfillJob

says that in order to match with the backfill slot, a job must have 

   BackfillJob=true. 

In the job classad.  Do your non-gpu jobs have that?

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From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of Vikrant Aggarwal <ervikrant06@xxxxxxxxx>
Sent: Friday, February 7, 2025 3:01 PM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: [HTCondor-users] Running non-gpu job on gpu machine referring Whats_New_condor_week_2023

 

Hello Experts,

I was reading the presentation Whats_New_condor_week_2023 and came across an interesting feature of backfill which I wanted to use on a gpu machine. 

From the presentation, I made this configuration, my GPU job runs on the machine without any trouble. 

START = $(START)
use feature : GPUs
GPU_DISCOVERY_EXTRA = -extra

PreemptMaxRuntime = 4 * 24 * 60
ExemptMaxRuntime = 4 * 24 * 60

BackfillSlot = true
ResourceConflict = "GPUs"
use FEATURE : PartitionableSlot(1, 100%)
SLOT_TYPE_1_START = TARGET.RequestGpus > 0
SLOT_TYPE_2_BACKFILL = true
use FEATURE : PartitionableSlot(2, 90%, GPUs=0)
SLOT_TYPE_2_PREEMPT = size(ResourceConflict?:"") > 0
SLOT_TYPE_2_START = TARGET.BackfillJob

However a non-gpu machine stays in idle status. --better-analyze doesn't reveal why it's in idle status. 

executable = sleep.sh
transfer_executable = false
arguments = 600
should_transfer_files = NO
+BackfillJob = True
queue 1

following I see in better-analyze for second slot. 

The Requirements _expression_ for this slot reduces to these conditions:

       Clusters
Step    Matched  Condition
-----  --------  ---------
[0]           1  START
[1]           1  WithinResourceLimits

Am I missing anything in the configuration to make non-gpu jobs run on a gpu machine? 

For clarity: at the time of testing no GPU job was running on that machine, it was a completely idle machine. 

Also, is the feature PreferGPUJobs mentioned in ppt introduced yet or not, couldn't find anything in release notes about it. 

Thanks & Regards,

Vikrant Aggarwal