Jeff, thanks for all the good catches.
MPI_Type_create_resized is not required in this example because send/recv are called with count=1. Generally speaking, if count > 1, MPI_Type_create_resized is required because the compiler might add some padding at the end of the type. Cheers, Gilles On 2015/01/08 20:08, Jeff Squyres (jsquyres) wrote: > There were still some minor errors left over in the attached program. > > I strongly encourage you to use "use mpi" instead of "include 'mpif.h'" > because you will get compile time errors when you pass incorrect / forget to > pass parameters to MPI subroutines. When I switched your program to "use > mpi", here's what the compiler showed me: > > 1. the name "MPI" is reserved > 2. need to pass displacements(1:nstruct+1) to mpi_type_create_struct > 3. need to pass request(1) to mpi_isend > 4. need to pass request(1) to mpi_wait > 5. need to pass ierr argument to mpi_wait > > 1-4 are technically not correct, but the program would likely (usually) > compile/run "correctly" anyway. 5 is probably what caused your segv. > > Attached is my copy of your program with fixes for the above-mentioned issues. > > BTW, I missed the beginning of this thread -- I assume that this is an > artificial use of mpi_type_create_resized for the purposes of a small > example. The specific use of it in this program appears to be superfluous. > > > > > > On Jan 8, 2015, at 4:26 AM, Gilles Gouaillardet > <gilles.gouaillar...@iferc.org> wrote: > >> Diego, >> >> yes, it works for me (at least with the v1.8 head and gnu compilers) >> >> Cheers, >> >> Gilles >> >> On 2015/01/08 17:51, Diego Avesani wrote: >>> Dear Gilles, >>> thanks again, however it does not work. >>> >>> the program says: "SIGSEGV, segmentation fault occurred" >>> >>> Does the program run in your case? >>> >>> Thanks again >>> >>> >>> >>> Diego >>> >>> >>> On 8 January 2015 at 03:02, Gilles Gouaillardet < >>> >>> gilles.gouaillar...@iferc.org >>>> wrote: >>> >>>> Diego, >>>> >>>> my bad, i should have passed displacements(1) to MPI_Type_create_struct >>>> >>>> here is an updated version >>>> >>>> (note you have to use a REQUEST integer for MPI_Isend and MPI_Irecv, >>>> and you also have to call MPI_Wait to ensure the requests complete) >>>> >>>> Cheers, >>>> >>>> Gilles >>>> >>>> >>>> On 2015/01/08 8:23, Diego Avesani wrote: >>>> >>>> Dear Gilles, Dear all, >>>> >>>> I'm sorry to bother you again, but I have some problem with send and >>>> receive the struct_data. >>>> >>>> I tried to send a MPI_Type_Create_Struct but I get a segmentation fault >>>> occurred and I do not know why. The program is very simple, it is the old >>>> one with the isend and irecv subroutines >>>> >>>> (you can find it in the attachment) >>>> >>>> Thanks again >>>> >>>> >>>> Diego >>>> >>>> >>>> On 5 January 2015 at 15:54, Diego Avesani >>>> <diego.aves...@gmail.com> <diego.aves...@gmail.com> >>>> wrote: >>>> >>>> >>>> Dear Gilles, >>>> >>>> Thanks, Thanks a lot. >>>> Now is more clear. >>>> >>>> Again, thanks a lot >>>> >>>> Diego >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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/2015/01/26116.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/2015/01/26118.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/2015/01/26124.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/2015/01/26126.php > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > > > > _______________________________________________ > 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/2015/01/26127.php
