Out of curiosity: if both systems are Intel, they why are you enabling hetero? You don’t need it in that scenario.
Admittedly, we do need to fix the bug - just trying to understand why you are configuring that way. > On Feb 10, 2016, at 8:46 PM, Michael Rezny <michael.re...@monash.edu> wrote: > > Hi Gilles, > I can confirm that with a fresh download and build from source for OpenMPI > 1.10.2 > with --enable-heterogeneous > the unpacked ints are the wrong endian. > > However, without --enable-heterogeneous, the unpacked ints are correct. > > So, this problem still exists in heterogeneous builds with OpenMPI version > 1.10.2. > > kindest regards > Mike > > On 11 February 2016 at 14:48, Gilles Gouaillardet > <gilles.gouaillar...@gmail.com <mailto:gilles.gouaillar...@gmail.com>> wrote: > Michael, > > does your two systems have the same endianness ? > > do you know how openmpi was configure'd on both systems ? > (is --enable-heterogeneous enabled or disabled on both systems ?) > > fwiw, openmpi 1.6.5 is old now and no more maintained. > I strongly encourage you to use openmpi 1.10.2 > > Cheers, > > Gilles > > On Thursday, February 11, 2016, Michael Rezny <michael.re...@monash.edu > <mailto:michael.re...@monash.edu>> wrote: > Hi, > I am running Ubuntu 14.04 LTS with OpenMPI 1.6.5 and gcc 4.8.4 > > On a single rank program which just packs and unpacks two ints using > MPI_Pack_external and MPI_Unpack_external > the unpacked ints are in the wrong endian order. > > However, on a HPC, (not Ubuntu), using OpenMPI 1.6.5 and gcc 4.8.4 the > unpacked ints are correct. > > Is it possible to get some assistance to track down what is going on? > > Here is the output from the program: > > ~/tests/mpi/Pack test1 > send data 000004d2 0000162e > MPI_Pack_external: 0 > buffer size: 8 > MPI_unpack_external: 0 > recv data d2040000 2e160000 > > And here is the source code: > > #include <stdio.h> > #include <mpi.h> > > int main(int argc, char *argv[]) { > int numRanks, myRank, error; > > int send_data[2] = {1234, 5678}; > int recv_data[2]; > > MPI_Aint buffer_size = 1000; > char buffer[buffer_size]; > > MPI_Init(&argc, &argv); > MPI_Comm_size(MPI_COMM_WORLD, &numRanks); > MPI_Comm_rank(MPI_COMM_WORLD, &myRank); > > printf("send data %08x %08x \n", send_data[0], send_data[1]); > > MPI_Aint position = 0; > error = MPI_Pack_external("external32", (void*) send_data, 2, MPI_INT, > buffer, buffer_size, &position); > printf("MPI_Pack_external: %d\n", error); > > printf("buffer size: %d\n", (int) position); > > position = 0; > error = MPI_Unpack_external("external32", buffer, buffer_size, &position, > recv_data, 2, MPI_INT); > printf("MPI_unpack_external: %d\n", error); > > printf("recv data %08x %08x \n", recv_data[0], recv_data[1]); > > MPI_Finalize(); > > return 0; > } > > > > _______________________________________________ > devel mailing list > de...@open-mpi.org <mailto:de...@open-mpi.org> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > <http://www.open-mpi.org/mailman/listinfo.cgi/devel> > Link to this post: > http://www.open-mpi.org/community/lists/devel/2016/02/18573.php > <http://www.open-mpi.org/community/lists/devel/2016/02/18573.php> > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2016/02/18575.php
