[Wien] Query regarding running less cpu core than available in the machine

[shamik chakrabarti]

Dear Sir,

               I have seen it directly from cpu monitor. The usage of the
cpus are 100% at all the 48 cpus (24 core)

On Mon, 8 Jul 2019 at 21:11, Peter Blaha <pblaha at theochem.tuwien.ac.at>
wrote:

> How did you find out that it has taken all 24 cores ?
>
> Am 08.07.2019 um 13:06 schrieb shamik chakrabarti:
> > Dear wien2k users,
> >
> >                               I have installed wien2k in a system having
> > Ubuntu. If I set OMP_NUM_THREAD = 2/3/4, it is taking all the available
> > 24 cores. Whereas if I set OMP_NUM_THREAD = 1 it is taking only 1 cpu
> > per calculation. My query is how can I use more than 1 cpu but less than
> > the total available cores (say I want to use 20 cores while total
> > available cores are 24)..
> >
> > Any response in this regard will be helpful for us.
> >
> > with regards,
> >
> > --
> > Dr. Shamik Chakrabarti
> > Project Employee
> > Dept. of Metallurgical and Materials Engineering
> > IIT Kharagpur
> > Kharagpur-721302
> > INDIA
> >
> > _______________________________________________
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> >
>
> --
> --------------------------------------------------------------------------
> Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
> Phone: +43-1-58801-165300             FAX: +43-1-58801-165982
> Email: blaha at theochem.tuwien.ac.at    WIEN2k: http://www.wien2k.at
> WWW:
>
> http://www.imc.tuwien.ac.at/tc_blaha-------------------------------------------------------------------------
>
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-- 
Dr. Shamik Chakrabarti
Project Employee
Dept. of Metallurgical and Materials Engineering
IIT Kharagpur
Kharagpur-721302
INDIA
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