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Re: [condor-users] Pc's with hyperthreading



You can turn off hyperthreading in the BIOS.

Fernando

Kewley, J (John) wrote:

-----Original Message-----
From: Ian.McLeod@xxxxxxxx [mailto:Ian.McLeod@xxxxxxxx]
...
Two questions 1. How do I want to convince condor that it really has only one CPU
I found the NUM_CPUS in the config file - but I note that its use is not recommended.


1. How good is the hyper-threading technology ? Should I be trying to convince condor that it really has only one CPU
?



On a similar note, anyone know if it is possible to effect the following:


* My job wants to run on 8 nodes. I realise that there could be some dual
nodes
 around, but if I get one of them, I only want it to count as a single as I
 want all the memory the node can get. I also want the other
 processor marked as occupied as I really don't want to share! I am willing
to wait!

* Where possible allocate jobs to separate nodes rather than both processors
of
 a dual. e.g. If I have a job which wants 4 processors of a system which
has duals,
 they should prefer 4 separate nodes rather than 2 duals. A sort of
breadth-first
 rather than depth-first strategy.

Also same strategies when applied to duals with hyper-threading.

I received this hypo(hyper?)thetical request from a colleague who is used to
a "real"
HPC to do his work.

Cheers

JK


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