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 > -- Ghislain Viguier Tél. 06 31 95 03 17
