Ghislain, i can confirm there is a bug in mca_topo_base_dist_graph_distribute
FYI a proof of concept is available at https://github.com/open-mpi/ompi/pull/283 and i recommend you use MPI_Dist_graph_create_adjacent if this meets your needs. as a side note, the right way to set the info is MPI_Info info = MPI_INFO_NULL; /* mpich is more picky and crashes with info = NULL */ Cheers, Gilles On 2014/11/21 18:21, Ghislain Viguier wrote: > Hi Gilles and Howard, > > The use of MPI_Dist_graph_create_adjacent solves the issue :) > > Thanks for your help! > > Best reagrds, > Ghislain > > 2014-11-21 7:23 GMT+01:00 Gilles Gouaillardet <gilles.gouaillar...@iferc.org >> : >> Hi Ghislain, >> >> that sound like a but in MPI_Dist_graph_create :-( >> >> you can use MPI_Dist_graph_create_adjacent instead : >> >> MPI_Dist_graph_create_adjacent(MPI_COMM_WORLD, degrees, &targets[0], >> &weights[0], >> degrees, &targets[0], &weights[0], info, >> rankReordering, &commGraph); >> >> it does not crash and as far as i understand, it produces correct results, >> >> according the the mpi standard (example 7.3) that should do the same >> thing, that's why >> i think there is a bug in MPI_Dist_graph_create >> >> Cheers, >> >> Gilles >> >> >> >> >> On 2014/11/21 2:21, Howard Pritchard wrote: >> >> Hi Ghislain, >> >> I tried to run your test with mvapich 1.9 and get a "message truncated" >> failure at three ranks. >> >> Howard >> >> >> 2014-11-20 8:51 GMT-07:00 Ghislain Viguier <ghislain.vigu...@gmail.com> >> <ghislain.vigu...@gmail.com>: >> >> >> Dear support, >> >> I'm encountering an issue with the MPI_Neighbor_alltoallw request of >> mpi-1.8.3. >> I have enclosed a test case with information of my workstation. >> >> In this test, I define a weighted topology for 5 processes, where the >> weight represent the number of buffers to send/receive : >> rank >> 0 : | x | >> 1 : | 2 | x | >> 2 : | 1 | 1 | x | >> 3 : | 3 | 2 | 3 | x | >> 4 : | 5 | 2 | 2 | 2 | x | >> >> In this topology, the rank 1 will send/receive : >> 2 buffers to/from the rank 0, >> 1 buffer to/from the rank 2, >> 2 buffers to/from the rank 3, >> 2 buffers to/from the rank 4, >> >> The send buffer are defined with the MPI_Type_create_hindexed_block. This >> allows to use a same buffer for several communications without duplicating >> it (read only). >> Here the rank 1 will have 2 send buffers (the max of 2, 1, 2, 2). >> The receiver buffer is a contiguous buffer defined with >> MPI_Type_contiguous request. >> Here, the receiver buffer of the rank 1 is of size : 7 (2+1+2+2) >> >> This test case succesful for 2 or 3 processes. For 4 processes, the test >> fails 1 times for 3 successes. For 5 processes, the test fails all the time. >> >> The error code is : *** MPI_ERR_IN_STATUS: error code in status >> >> I don't understand what I am doing wrong. >> >> Could you please have a look on it? >> >> Thank you very much. >> >> Best regards, >> Ghislain Viguier >> >> -- >> Ghislain Viguier >> Tél. 06 31 95 03 17 >> >> _______________________________________________ >> users mailing listus...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this >> post:http://www.open-mpi.org/community/lists/users/2014/11/25850.php >> >> >> >> _______________________________________________ >> users mailing listus...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2014/11/25852.php >> >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2014/11/25853.php >> > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2014/11/25855.php
