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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.<br>
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On 02/20/2012 10:44 AM, Phil Carns wrote:
<blockquote cite="mid:4F42947F.9040405@mcs.anl.gov" type="cite">I don't have any first-hand experience with Intel MPI, but in principle it should work.
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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:<br>
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<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://wiki.mcs.anl.gov/Darshan/index.php/Dynamic_linking">http://wiki.mcs.anl.gov/Darshan/index.php/Dynamic_linking</a><br>
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thanks,<br>
-Phil<br>
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On 02/20/2012 01:28 PM, Harr, Cameron Contractor, SAIC wrote:
<blockquote cite="mid:4F4290C3.2060900@navy.mil" type="cite">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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