Re: [condor-users] Condor and Hyperthreading

[Mark Visser <mark@xxxxxxxxxx>]

Matthew P. Bohnsack wrote:

> Hello,
>
> I'm using Condor 6.4.7 on a group of Linux workstations.  All machines
> have 2 P4/Xeon CPUs, but some have Hyperthreading enabled and some do
> not.  The result is that some nodes show up in condor_status with two
> entries, while others have four entries.
>
> Is there a way to have Condor consider all nodes as dual-CPU, despite
> the Hyperthreading BIOS settings?
>
> Thanks
>
> -Matt
>  
Put this in your condor_config, or in the condor_config.local of each 
node you want to affect:

VIRTUAL_MACHINE_TYPE_1 = cpus=1, mem=50%
NUM_VIRTUAL_MACHINES_TYPE_1 = 2

The docs for this is under Special Environments, SMP machines.  Another 
very useful configuration setting for multi-CPU machines is:

VIRTUAL_MACHINES_CONNECTED_TO_CONSOLE = N
VIRTUAL_MACHINES_CONNECTED_TO_KEYBOARD = N

Where N is the number of virtual machines that "notice" keyboard or 
console activity.  If set to 0, user activity will not affect condor's 
state on those machines.  If 1, only one virtual machine can be 
interrupted by user activity.  If 2, condor jobs on both virtual 
machines may be interruped by user activity.

-Mark

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