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jayanti prasad
Joined: 21 Oct 2010
Posts: 9
Affiliation: Inter-University Centre for Astronomy and Astrophysics (IUCAA)
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 Posted: July 02 2011 |
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I have two issues:
(1) I have not been able to compile COSMOMC with 'mpif90' with '-openmp' option for OpenMP. Basically I want CAMB to use OpenMP (as it does for an independent case). Any clue
(2) I can compile COSMOMC with 'ifort' with OpenMP option and it does work but gives very poor performance. I use 8 threads but never get more than 300 % CPU on a single node. .
Regards
Jayanti Prasad |
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Sheng Li
Joined: 26 May 2009
Posts: 44
Affiliation: Univ. of Sussex
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| Posted: July 04 2011 |
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| did i reply you? but where is my reply? |
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Sheng Li
Joined: 26 May 2009
Posts: 44
Affiliation: Univ. of Sussex
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| Posted: July 04 2011 |
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| jayanti prasad wrote: | I have two issues:
(1) I have not been able to compile COSMOMC with 'mpif90' with '-openmp' option for OpenMP. Basically I want CAMB to use OpenMP (as it does for an independent case). Any clue |
Try ignoring option -openmp just for mpirun or mpif90.
But add it to F90Flag or FFlag for compiler (in your case, ifort)
mpirun stuffs are just a wrapper, i think.
| Quote: | (2) I can compile COSMOMC with 'ifort' with OpenMP option and it does work but gives very poor performance. I use 8 threads but never get more than 300 % CPU on a single node. .
Regards
Jayanti Prasad |
i think the above solution will help if you can compile through.
And before doing that, make sure you can find mpirun/mpif90. Just type 'which mpirun' in term, then also you need to know which compiler and suffix will be linked by mpirun, just type 'mpirun -show' or mpirun without argument in term.
You will sort it yourself i think.
good luck. |
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