Re: [HTCondor-users] Reserve Cpus support in HTCondor

[Ram Ban <ramban046@xxxxxxxxx>]

Thanks everyone for the response,

So if I start condor using sysctl, via tasket will Detected cores on machine will change?

And what will happen if I have also set Count_Hyperthreaded_cpus = False

Thanks and RegardsÂ

Raman

On Tue, Jan 20, 2026, 21:01 Greg Thain via HTCondor-users <htcondor-users@xxxxxxxxxxx> wrote:

On 1/17/26 06:21, Ram Ban wrote:
> Hi all,
>
> Is there any support in HTCondor to reserve Cpu0 and not to use it?
> As then I can isolate all cpus for performance and update all
> interrupts and other stuff to Cpu0?


If you really want to keep all HTCondor daemons, and not just the job
from running on a given core, I would look at the systemd CPUAffinity
setting in the HTCondor unit. This can prevent the condor_master, and
all child processes from running on a particular core.

-greg



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