Hi Ye, Thank you for your suggestion. I tried it and when I ran the code, it seg-faulted. I put flags in the code to see where the segmentation faults occurs. It happens as the code calls mp_sum. It seems that mp_sum may not be able to handle this reduction.
Cheers, Vahid On Oct 28, 2016, at 2:51 PM, Ye Luo <[email protected]<mailto:[email protected]>> wrote: In Fortran, whatever-D array is 1-D array. mp_sum should be fine. I saw something strange in your code that you were not copying the right things as you expected. How about the following? output(1:3,1:nbnds,(k_pool*pool_id+1:k_pool*pool_id+k_pool))=input(1:3,1:nbnds,1:k_pool) Ye =================== Ye Luo, Ph.D. Leadership Computing Facility Argonne National Laboratory 2016-10-28 12:29 GMT-05:00 Vahid Askarpour <[email protected]<mailto:[email protected]>>: Dear QE Users, I am working on some modifications to the QE-6.0 code using symmetry. When I try to combine a 3-D array scattered across nodes, I use the following: output(3,nbnds,(k_pool*pool_id+1:k_pool*pool_id+k_pool))=input(3,nbnds,1:k_pool) Here, nbnds is the number of bands, k_pool is the number of k points/pool, and pool_id is the id of the pool. Here I am assuming the the number of k points is divisible by the number of pools. Then I call mp_sum(output,inter_pool_comm) to put all the segments of input across the nodes into one output file. When I run the modified QE code in parallel, the output file is different from the serial run. Does the QE's mp_sum allow the above operation for a three-D array? Any hints or suggestions would be greatly appreciated. Vahid Vahid Askarpour Department of Physics and Atmospheric Science Dalhousie University, Halifax, NS, Canada _______________________________________________ Pw_forum mailing list [email protected]<mailto:[email protected]> http://pwscf.org/mailman/listinfo/pw_forum _______________________________________________ Pw_forum mailing list [email protected]<mailto:[email protected]> http://pwscf.org/mailman/listinfo/pw_forum
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