[Wien] OMP_NUM_THREADS

2011-07-28 Thread Dr Qiwen YAO
time and help! Qiwen --Original Message-- From:Gerhard Fecherfecher at uni-mainz.de To:A Mailing list for WIEN2k userswien at zeus.theochem.tuwien.ac.at Cc: Subject:Re: [Wien] OMP_NUM_THREADS Date:07/27/2011 03:17:21 PM(+) If you have four real cores you may run in parallel either 4 k

[Wien] OMP_NUM_THREADS

2011-07-28 Thread Dr Qiwen YAO
Cc: Subject:Re: [Wien] OMP_NUM_THREADS Date:07/27/2011 07:24:19 PM(+) Here a simpoified answer when using a single processor multiple core machine. The Hyperthreading of the processor has nothing to do with the threads that MKL uses, MKL is (internally) parallelized, that is it can execute

[Wien] OMP_NUM_THREADS

2011-07-27 Thread Dr Qiwen YAO
Dear Wien2k users, We were told in the WIEN workshop that for mkl+multi-core cases, it might be better having a setting of $OMP_NUM_THREADS =2. I have two questions in my mind: Q1. Does this apply to a 2 core system with 4GB RAM that is not running parallel calculation (not K-point parallel

[Wien] OMP_NUM_THREADS

2011-07-27 Thread Gerhard Fecher
at zeus.theochem.tuwien.ac.at [wien-bounces at zeus.theochem.tuwien.ac.at]quot; im Auftrag von quot;Dr Qiwen YAO [Yao.Qiwen at nims.go.jp] Gesendet: Mittwoch, 27. Juli 2011 17:30 Bis: A Mailing list for WIEN2k users Betreff: Re: [Wien] OMP_NUM_THREADS Dear Gerhard, Thank you very much for your respond. I