Re: [Condor-users] 7.0.1 still doesn't fully detecthyperthreadingWintel nodes?

["Finch, Ralph" <rfinch@xxxxxxxxxxxx>]

I was expecting, on a 2-cpu machine with HT, just 2 slots.  My bad, I
failed to see the single COUNT_HYPERTHREAD_CPUS reference in the 863
pages of documentation.  So I added that (... = FALSE) to all our
machines' condor_config.local file, issued a condor_reconfig -all,
and....

...they still show 4 slots.  Hmm.  Does it need a restart instead of
reconfigure?

Ralph Finch
916-653-7552


-----Original Message-----
From: condor-users-bounces@xxxxxxxxxxx
[mailto:condor-users-bounces@xxxxxxxxxxx] On Behalf Of Kewley, J (John)
Sent: Monday, April 07, 2008 8:06 AM
To: Condor-Users Mail List
Subject: Re: [Condor-users] 7.0.1 still doesn't fully
detecthyperthreadingWintel nodes?

> I upgraded to 7.0.1 over the weekend from 6.8.x in the hopes of better

> detection of hyperthreading on SMP machines.  We have a number of 
> two-cpu Wintel boxes that have hyperthreading turned on.  Under 6.8.x 
> Condor thought each hyperthreaded cpu was two VMs, so those boxes
ended
> up with 4 VMs.   Condor 7.0.1 has the new Slot terminology and coding,
> but it still thinks a hyperthreaded cpu is two separate slots.

You had: A 2-cpu machine with HT
You got: 4 VMs

You now have: A 2-cpu machine with HT
You get: 2x 2 slots = 4 slots

Is that what you said? If so, this is what I would expect it to give
unless you turned off HT recognition within COUNT_HYPERTHREAD_CPUS =
FALSE

How many slots were you expecting?
How many do you want?

> Our condor_config files have handled this problem for years, but I was

> hoping to remove a lot of the kluges we used.  Is there something else

> I need to do with 7.0.1 to have the hyperthreaded machines properly 
> detected?

That depends what you mean by properly:
How many slots were you expecting?
How many do you want?

Cheers

JK