Thanks Phil. Using the PRELOAD, I can get a sample output with one of the test C programs that comes with the Darshan source; however, I still don't get any output from my executable. Let me ask a basic question: My app is all Fortran; do I need to compile in any support into Darshan for Fortran compatibility? I see that it should support Fortran, but perhaps I'm doing something wrong.

On 02/20/2012 10:44 AM, Phil Carns wrote:

I don't have any first-hand experience with Intel MPI, but in principle it should work.

Does your MPI compiler produces dynamic executables by default? If so, can you try leaving your executable/binary unmodified and load the libdarshan.so library at runtime using the LD_PRELOAD environment variable, rather than directly linking it to your application? There is some more detail about this approach on this page:

http://wiki.mcs.anl.gov/Darshan/index.php/Dynamic_linking

thanks,
-Phil

On 02/20/2012 01:28 PM, Harr, Cameron Contractor, SAIC wrote:
I'm trying to get Darshan running on a RedHat/X86_64 cluster with a few different flavors of MPI available. I'm most recently trying Intel MPI and gfortran (Intel Compilers didn't seem to work) and after a fair bit of tweaking, got the executable recompiled with libdarshan.so successfully linked in. In my job run script, I verify that libdarshan is linked in and the job runs to completion; however no output is generated. I also tried setting DARSHAN_INTERNAL_TIMING=1, but still no output. Should I be able to use Intel MPI and/or is there a place that documents which MPI stacks are supported?
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