[Pw_forum] Optimal number of CPUs

[Nicola Marzari]

Ihor Kupchak wrote:
> Dear pwscf users!
> I run CP calculation with parallel version 3.2. Using 16 CPUs I got only 1.8 time/step 
> Ihor Kupchak


Dear Ihor,

have in particular a look at this, on scaling, latency, etc...
http://www.democritos.it/pipermail/pw_forum/2006-December/005540.html


				nicola

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