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parallel vs single

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Old   June 20, 2014, 11:14
Default parallel vs single
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Hedley
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Finally got parallel to run BUT where solving on the turb_ONERA6.cfg if I run on single core it runs TWICE as fast as on a four core ??

When running four core it seems to do the same job over on each core + all of the MPI overhead.
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Old   June 20, 2014, 11:30
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XingYu
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Do you can run parallel in win7?
If yes,you can tell me how to install the su2 v3.2 in win7,thank you greatly.
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Old   June 20, 2014, 11:33
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No I gave up on that . To get it to run on Linux was more a matter of setting up the PATH's to the MPI /bin file . I still think although it runs it is not doing it properly as it is way slower than on one core. The Linux attempt is just a sanity test and once done will try and get windows working
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Old   June 23, 2014, 05:19
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Jeffrey van Oostrom
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It seems that each calculation is carried out 4 times on 4 cores, rather than 1 time on 4 cores. This is due to a faulty mpicxx setup. View this thread for more info:

Parallel processing: Each iteration carried out 4 times

The same issue arised on my machine, I simply had to check if the link towards mpicxx was set correctly.
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