Intel Software Network - <![CDATA[ OpenMP-MPI hybrid code - SIGSEGV ]]> feed http://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/66720 en-us Re: OpenMP-MPI hybrid code - SIGSEGV
Quoting - amit

I also went through the segmentation error guide and couldn't find an answer to this problem.
(I have also tried setting the KMP_STACKSIZE to 25GB and ulimit -s unlimited)
btw, I use ifort 10.0.

amit@sys:~/openmp> mpirun -np 1 ./2009.x
MPI: On host sys, Program /openmp/2009.x, Rank 0, Process 26346 received signal SIGSEGV(11)

You could try the -check and -g options to find out where you have problems. I wouldn't expect to find answers without following up Ron's suggestions about how to dig deeper. In principle, thread checker should be applicable, although it hasn't had much maintenance lately.
Why are you using such an old compiler?
When running 1 mpi process, it shouldn't matter which MPI you are using, but if your MPI is as old as your compiler, you are probably wasting your time.     The current Intel and HP MPI have built-in support for hybrid.
]]> http://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/66720/ Thu, 02 Jul 2009 17:58:13 -0700 http://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/66720/ ISN General Re: OpenMP-MPI hybrid code - SIGSEGV
Quoting - tim18
You could try the -check and -g options to find out where you have problems. I wouldn't expect to find answers without following up Ron's suggestions about how to dig deeper. In principle, thread checker should be applicable, although it hasn't had much maintenance lately.
Why are you using such an old compiler?
When running 1 mpi process, it shouldn't matter which MPI you are using, but if your MPI is as old as your compiler, you are probably wasting your time.     The current Intel and HP MPI have built-in support for hybrid.

As Tim says, do try -g -traceback and see if anything comes from that.

In older MPI implementations I have seen errors where environment is not propagated to child processes spawned by mpirun.  I would write a simple script:

#!/bin/bash
env

and run this under mpirun:  mpirun -np 1 ./myscript

just to see if your stacksize and KMP variables are propagating.  You could/should add those ulimit and KMP definitions to your login scripts   .profile  .cshrc or whatever ones you use.
]]> http://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/66720/ Fri, 03 Jul 2009 06:24:04 -0700 http://software.intel.com/en-us/forums/intel-fortran-compiler-for-linux-and-mac-os-x/topic/66720/ ISN General