Difference between revisions of "Profiling GEOS-Chem"

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(Profiling GEOS-Chem with gprof)
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== Profiling GEOS-Chem with gprof ==
 
== Profiling GEOS-Chem with gprof ==
  
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[https://sourceware.org/binutils/docs/gprof/ The GNU profiler (<tt>gprof</tt>)] is a free, open source software package that you can use to determine which subroutines of GEOS-Chem are taking the most time.  If your computer system has the GNU Compiler Collection already installed (as do most modern Unix/Linux clusters), then <tt>gprof</tt> should also be available for you to use.
  
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[[GEOS-Chem v11-01]] and higher versions have support for <tt>gprof</tt>.  To profile GEOS-Chem, you must compile with the <tt>GPROF=y</tt> Makefile option, e.g.:
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make -j4 GPROF=y ...etc. other makefile options ...
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This will add the following compiler switches to the compilation sequence:
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{| border=1 cellspacing=0 cellpadding=5
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|-valign="top" bgcolor="#CCCCCC"
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!width="250px"|Compiler
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!width="200px"|Switch to invoke <tt>gprof</tt>
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|-valign="top"
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|[[Intel Fortran Compiler|Intel Fortran compiler (<tt>ifort</tt>)]]
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|<tt>-p</tt>
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|-valign="top"
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|[[GNU Fortran compiler|GNU Fortran compiler (<tt>gfortran</tt>)]]
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|<tt>-pg</tt>
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|-valign="top"
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|[[PGI Fortran compiler|PGI Fortran compiler (<tt>pgfortran</tt>)]]
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|<tt>-pg</tt>
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|}
  
 
== Profiling GEOS-Chem with TAU ==
 
== Profiling GEOS-Chem with TAU ==
  
 
Information to be added
 
Information to be added

Revision as of 17:35, 14 December 2016

Page is under construction.jpg

Overview

Profiling GEOS-Chem with gprof

The GNU profiler (gprof) is a free, open source software package that you can use to determine which subroutines of GEOS-Chem are taking the most time. If your computer system has the GNU Compiler Collection already installed (as do most modern Unix/Linux clusters), then gprof should also be available for you to use.

GEOS-Chem v11-01 and higher versions have support for gprof. To profile GEOS-Chem, you must compile with the GPROF=y Makefile option, e.g.:

make -j4 GPROF=y ...etc. other makefile options ...

This will add the following compiler switches to the compilation sequence:

Compiler Switch to invoke gprof
Intel Fortran compiler (ifort) -p
GNU Fortran compiler (gfortran) -pg
PGI Fortran compiler (pgfortran) -pg

Profiling GEOS-Chem with TAU

Information to be added