[Wien] I still have problem with wienk in parallel mode

Laurence Marks L-marks at northwestern.edu
Mon Jan 2 20:16:03 CET 2012


> The number of these will tell you how many cores you have (and it
> could be twice the true number if hyperthreading is on).
> From http://fixunix.com/redhat/16135-how-determine-linux-real-cpus-vs-hyperthreaded-ht-virtual-cpus.html
>
> a) This should report the total number of physical CPUs:
> grep -i "physical id" /proc/cpuinfo | sort -u | wc -l
>
> b) This should report the total number of logical CPUs:
> grep -i "processor" /proc/cpuinfo | sort -u | wc -l

Slight oops: I just copied these without checking them -- and the
answer I copied is not right! In any case, as Gerhard says there is no
hyperthreading for those CPUs so you can get the maximum number of
cores from the second grep (and then use this in the ":X" line,
probably ":4" for you.

I think you have a /etc/hosts or DNS issue.

-- 
Professor Laurence Marks
Department of Materials Science and Engineering
Northwestern University
www.numis.northwestern.edu 1-847-491-3996
"Research is to see what everybody else has seen, and to think what
nobody else has thought"
Albert Szent-Gyorgi


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