MPI: Difference between revisions

MPI (view source)

Revision as of 19:50, 10 March 2022

61 bytes removed , 2 years ago

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cleanup

Rdickson

Bureaucrats, cc_docs_admin, cc_staff

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-The packages of MPI libraries typically provide so called "wrappers" for compilers.
+The packages of MPI libraries typically provide so-called "wrappers" for compilers.
-These are not compilers themselves but call other compilers and at the same time make sure to pass MPI-specific compiler flags to the compiler (i.e. they are a "thin" wrapper around the compiler).
+These are not compilers themselves but call other compilers and at the same time make sure to pass MPI-specific flags to the compiler.
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-'''Note''' that the Compute Canada software stack contains several modules of the same Open&nbsp;MPI package (e.g. <code>openmpi/4.0.3</code>) that have been compiled with different compilers and without to with CUDA support.  The MPI compiler-wrappers will always use those compilers and versions that have been loaded with a module (i.e. <code>intel</code> or <code>gcc</code>).
+'''Note''' that the Compute Canada software stack contains several modules of the same Open&nbsp;MPI package (e.g. <code>openmpi/4.0.3</code>) that have been built with different compilers, and with and without CUDA support.  The MPI compiler-wrappers will always use the compiler and compiler version that you have loaded with the <code>module load</code> command.
 <!--T:60-->
-For example with loaded <code>intel/2020.1.217</code> and <code>openmpi/4.0.3</code> modules:
+For example, if you have loaded the <code>intel/2020.1.217</code> and <code>openmpi/4.0.3</code> modules:
 {{Command
 |mpicc -showme
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-and with loaded <code>gcc/9.3.0</code> and <code>openmpi/4.0.3</code> modules:
+If you have loaded <code>gcc/9.3.0</code> and <code>openmpi/4.0.3</code> modules:
 {{Command
 |mpicc -showme