"I have made a test case..." means there is little reason not to attach said test case to the email for verification :-)
The following is in mpi.h.in in the OpenMPI trunk. ========================= /* * Just in case you need it. :-) */ #define OPEN_MPI 1 /* * MPI version */ #define MPI_VERSION 2 #define MPI_SUBVERSION 2 ========================= Two things can be said from this: (1) You can workaround this non-portable awfulness with the C preprocess by testing for the OPEN_MPI symbol. (2) OpenMPI claims to be compliant with the MPI 2.2 standard, hence any failures to adhere to the behavior specified in that document for MPI_IN_PLACE is erroneous. Best, Jeff On Tue, Oct 8, 2013 at 2:40 PM, Gerlach, Charles A. <charles.gerl...@swri.org> wrote: > I have an MPI code that was developed using MPICH1 and OpenMPI before the > MPI2 standards became commonplace (before MPI_IN_PLACE was an option). > > > > So, my code has many examples of GATHERV, AGATHERV and SCATTERV, where I > pass the same array in as the SEND_BUF and the RECV_BUF, and this has worked > fine for many years. > > > > Intel MPI and MPICH2 explicitly disallow this behavior according to the MPI2 > standard. So, I have gone through and used MPI_IN_PLACE for all the > GATHERV/SCATTERVs that used to pass the same array twice. This code now > works with MPICH2 and Intel_MPI, but fails with OpenMPI-1.6.5 on multiple > platforms and compilers. > > > > PLATFORM COMPILER SUCCESS? (For at least one > simple example) > > ------------------------------------------------------------ > > SLED 12.3 (x86-64) – Portland group - fails > > SLED 12.3 (x86-64) – g95 - fails > > SLED 12.3 (x86-64) – gfortran - works > > > > OS X 10.8 -- intel -fails > > > > > > In every case where OpenMPI fails with the MPI_IN_PLACE code, I can go back > to the original code that passes the same array twice instead of using > MPI_IN_PLACE, and it is fine. > > > > I have made a test case doing an individual GATHERV with MPI_IN_PLACE, and > it works with OpenMPI. So it looks like there is some interaction with my > code that is causing the problem. I have no idea how to go about trying to > debug it. > > > > > > In summary: > > > > OpenMPI-1.6.5 crashes my code when I use GATHERV, AGATHERV, and SCATTERV > with MPI_IN_PLACE. > > Intel MPI and MPICH2 work with my code when I use GATHERV, AGATHERV, and > SCATTERV with MPI_IN_PLACE. > > > > OpenMPI-1.6.5 works with my code when I pass the same array to SEND_BUF and > RECV_BUF instead of using MPI_IN_PLACE for those same GATHERV, AGATHERV, and > SCATTERVs. > > > > > > -Charles > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Hammond jeff.scie...@gmail.com
