[pymvpa] pprocess and number of CPU cores?

Matthias Ekman Matthias.Ekman at nf.mpg.de
Thu Apr 1 09:44:11 UTC 2010

Dear Experts,

we are currently planning to buy a new server mainly for pymvpa-stuff. I 
would like to ask you if you have any experience how well the new 
pprocess implementation of the searchlight algorithm scales with the 
number of CPU cores (beyond 8 cores).

In this commit Michael points out 25% speed-up for 2 cores (and 250% for 
8 cores):

But later on some improvements were made leading to a speed-up of 65% 
for 2 cores:

I am thinking about 2x 8 cores (lower clock speed) vs. 1x 12 cores 
(higher clock speed) which would be the same price range. With good 
scaling I would prefer the 2x 8 cores.

Btw: thanks for the pprocess implementation! Its a great feature.

Thanks in advance,

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