Hi, I am using DRAGON, a neutronic simulation code in FORTRAN77 that has its own datastructures. I added a module to send these data structures thanks to MPI_SEND / MPI_RECEIVE, and everything worked perfectly for a while.
Then I had to raise the number of data structures to be sent up to a point where my cluster has this bug : *** Process received signal *** Signal: Segmentation fault (11) Signal code: Address not mapped (1) Failing at address: 0x2c2579fc0 [ 0] /lib/libpthread.so.0 [0x7f52d2930410] [ 1] /home/toueg/openmpi/lib/openmpi/mca_pml_ob1.so [0x7f52d153fe03] [ 2] /home/toueg/openmpi/lib/libmpi.so.0(PMPI_Recv+0x2d2) [0x7f52d3504a1e] [ 3] /home/toueg/openmpi/lib/libmpi_f77.so.0(pmpi_recv_+0x10e) [0x7f52d36cf9c6] *How can I make this error more explicit ?* I use the following configuration of openmpi-1.4.3 : ./configure --enable-debug --prefix=/home/toueg/openmpi CXX=g++ CC=gcc F77=gfortran FC=gfortran FLAGS="-m64 -fdefault-integer-8 -fdefault-real-8 -fdefault-double-8" FCFLAGS="-m64 -fdefault-integer-8 -fdefault-real-8 -fdefault-double-8" --disable-mpi-f90 Here is the output of mpif77 -v : mpif77 for 1.2.7 (release) of : 2005/11/04 11:54:51 Driving: f77 -L/usr/lib/mpich-mpd/lib -v -lmpich-p4mpd -lpthread -lrt -lfrtbegin -lg2c -lm -shared-libgcc Lecture des spécification à partir de /usr/lib/gcc/x86_64-linux-gnu/3.4.6/specs Configuré avec: ../src/configure -v --enable-languages=c,c++,f77,pascal --prefix=/usr --libexecdir=/usr/lib --with-gxx-include-dir=/usr/include/c++/3.4 --enable-shared --with-system-zlib --enable-nls --without-included-gettext --program-suffix=-3.4 --enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug x86_64-linux-gnu Modèle de thread: posix version gcc 3.4.6 (Debian 3.4.6-5) /usr/lib/gcc/x86_64-linux-gnu/3.4.6/collect2 --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 /usr/lib/gcc/x86_64-linux-gnu/3.4.6/../../../../lib/crt1.o /usr/lib/gcc/x86_64-linux-gnu/3.4.6/../../../../lib/crti.o /usr/lib/gcc/x86_64-linux-gnu/3.4.6/crtbegin.o -L/usr/lib/mpich-mpd/lib -L/usr/lib/gcc/x86_64-linux-gnu/3.4.6 -L/usr/lib/gcc/x86_64-linux-gnu/3.4.6 -L/usr/lib/gcc/x86_64-linux-gnu/3.4.6/../../../../lib -L/usr/lib/gcc/x86_64-linux-gnu/3.4.6/../../.. -L/lib/../lib -L/usr/lib/../lib -lmpich-p4mpd -lpthread -lrt -lfrtbegin -lg2c -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-linux-gnu/3.4.6/crtend.o /usr/lib/gcc/x86_64-linux-gnu/3.4.6/../../../../lib/crtn.o /usr/lib/gcc/x86_64-linux-gnu/3.4.6/../../../../lib/libfrtbegin.a(frtbegin.o): dans la fonction ▒ main ▒: (.text+0x1e): référence indéfinie vers ▒ MAIN__ ▒ collect2: ld a retourné 1 code d'état d'exécution Thanks, Benjamin
