Did you also change the "&buffer" to buffer in your MPI_Send call?
Jody On Tue, Sep 22, 2009 at 1:38 PM, Everette Clemmer <clemm...@gmail.com> wrote: > Hmm, tried changing MPI_Irecv( &buffer....) to MPI_Irecv( buffer...) > and still no luck. Stack trace follows if that's helpful: > > prompt$ mpirun -np 2 ./display_test_debug > Sending 'q' from node 0 to node 1 > [COMPUTER:50898] *** Process received signal *** > [COMPUTER:50898] Signal: Segmentation fault (11) > [COMPUTER:50898] Signal code: (0) > [COMPUTER:50898] Failing at address: 0x0 > [COMPUTER:50898] [ 0] 2 libSystem.B.dylib > 0x00007fff87e280aa _sigtramp + 26 > [COMPUTER:50898] [ 1] 3 ??? > 0x0000000000000000 0x0 + 0 > [COMPUTER:50898] [ 2] 4 GLUT > 0x0000000100024a21 glutMainLoop + 261 > [COMPUTER:50898] [ 3] 5 display_test_debug > 0x0000000100001444 xsMainLoop + 67 > [COMPUTER:50898] [ 4] 6 display_test_debug > 0x0000000100001335 main + 59 > [COMPUTER:50898] [ 5] 7 display_test_debug > 0x0000000100000d9c start + 52 > [COMPUTER:50898] [ 6] 8 ??? > 0x0000000000000001 0x0 + 1 > [COMPUTER:50898] *** End of error message *** > mpirun noticed that job rank 0 with PID 50897 on node COMPUTER.local > exited on signal 15 (Terminated). > 1 additional process aborted (not shown) > > Thanks, > Everette > > > On Tue, Sep 22, 2009 at 2:28 AM, Ake Sandgren <ake.sandg...@hpc2n.umu.se> > wrote: >> On Mon, 2009-09-21 at 19:26 -0400, Everette Clemmer wrote: >>> Hey all, >>> >>> I'm getting a segmentation fault when I attempt to receive a single >>> character via MPI_Irecv. Code follows: >>> >>> void recv_func() { >>> if( !MASTER ) { >>> char buffer[ 1 ]; >>> int flag; >>> MPI_Request request; >>> MPI_Status status; >>> >>> MPI_Irecv( &buffer, 1, MPI_CHAR, 0, MPI_ANY_TAG, >>> MPI_COMM_WORLD, &request); >> >> It should be MPI_Irecv(buffer, 1, ...) >> >>> The segfault disappears if I comment out the MPI_Irecv call in >>> recv_func so I'm assuming that there's something wrong with the >>> parameters that I'm passing to it. Thoughts? >> >> -- >> Ake Sandgren, HPC2N, Umea University, S-90187 Umea, Sweden >> Internet: a...@hpc2n.umu.se Phone: +46 90 7866134 Fax: +46 90 7866126 >> Mobile: +46 70 7716134 WWW: http://www.hpc2n.umu.se >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > > > -- > - Everette > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >