March 2020 - Darshan-users - mailman3.cels.anl.gov

Multiple MPI libraries on one system?
by Christopher J. Morrone 06 Mar '20

06 Mar '20

Has anyone out there dealt with using darshan on a system that has multiple MPI libraries installed? Since various MPIs are not necessarily ABI compatible, I presume that I'll need multiple builds of darshan, and a mechanism to select the correct darshan LD_PRELOAD based on which MPI any particular application is using. Any tips for making this easier? Chris

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Darshan rpm packages
by Christopher J. Morrone 03 Mar '20

03 Mar '20

Has anyone created rpm packages of Darshan? Is anyone attached to the current way that Darshan implements DESTDIR? The current approach does not quite approximate the way that automake uses DESTDIR. Is there any particular reason that Darshan avoids using automake? automake allows a software package to be targeted for final install in some root tree using "./configure --prefix=/usr/local". DESTDIR on the other hand is intended to allow a staged install to some temporary location, which is a vital step in some packaging systems. The standard automake DESTDIR usage is described here: https://www.gnu.org/software/automake/manual/html_node/DESTDIR.html Darshan is resetting DESTDIR in its Makefile to an empty value, so it breaks that standard automake usage. Darshan is also setting variables like "libdir" to have the DESTDIR prefix at the beginning of the Makefile. That may or may not matter in this case, but normally prepending DESTDIR is reserved for the "install" make target rather than incorporating into all of the standard path variables. The issue is that setting it too early could result in the temporary DESTDIR path appearing in compiled-in rpaths and the like. I'll take a first pass at just relocating DESTDIR in the existing Makefile.in files. Chris

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Darshan PNETCDF delete function
by Claire Lee 02 Mar '20

02 Mar '20

Hello, I am currently working on creating Darshan support for pNetCDF library, specifically the ncmpi_delete function. I would like to complete the task of saving the start and end timestamp of the pNetCDF but am running into the error "invalid storage class" for functions such pnetcdf_runtime_initialize when I run make install. I have added to the darshan-pnetcdf.c file in darshan-runtime/lib and darshan-utils/darshan-pnetcdf-logutils.c Would you happen to have run into this error before? Also, would it be possible to explain how the darshan_add_record_ref() and darshan_delete_record_ref() functions work? Thank you so much for your help!

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