[HTCondor-users] condor_kflops returning -1

[John Veitch <John.Veitch@xxxxxxxxxxxxx>]

Hi there,

I recently added a new machine to a small condor pool at our university. I noticed that jobs were not landing on that node, and realised that this might be because its benchmark info was not fully populated so it was being deprioritised when matchmaking.

Running condor_kflops on the machine as root usually returns immediately with the output value -1
root@puck:~# /usr/libexec/condor/condor_kflops
KFlops = -1
--

whereas very occasionally (maybe 1/20 times I ran it) it runs for a few seconds and produces what seems to be the proper output:
root@puck:~# /usr/libexec/condor/condor_kflops
KFlops = 9105849
--

I can't find any information about condor_kflops that might give me a clue why this is happening. There are no indications of errors in any logs. The CPU is a AMD Threadripper 9980X. The output of condor_version is
root@puck:~# condor_version
$CondorVersion: 24.11.2 2025-08-21 BuildID: 827416 PackageID: 24.11.2-1+deb12 GitSHA: a2297d25 $
$CondorPlatform: X86_64-Debian_12 $

It seems like there may be a problem with condor_kflops, or possibly a bad interaction with the hardware? On the other hand, condor_mips works properly 100% of the time.

Cheers,
John