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4.9 KiB
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136 lines
4.9 KiB
HTML
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original version by: Nikos Drakos, CBLU, University of Leeds
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<TITLE>Prerequisites</TITLE>
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<B> Next:</B> <A NAME="tex2html155"
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HREF="node7.html">Optional third party libraries</A>
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<B> Up:</B> <A NAME="tex2html151"
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HREF="node5.html">Configuring and Building MLD2P4</A>
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HREF="node5.html">Configuring and Building MLD2P4</A>
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<H2><A NAME="SECTION00051000000000000000">
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Prerequisites</A>
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</H2>
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<P>
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The following base libraries are needed:
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<DL>
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<DT><STRONG>BLAS</STRONG></DT>
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<DD>[<A
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HREF="node28.html#blas3">12</A>,<A
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HREF="node28.html#blas2">13</A>,<A
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HREF="node28.html#blas1">20</A>] Many vendors provide optimized versions
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of BLAS; if no vendor version is
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available for a given platform, the ATLAS software
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(<TT><A NAME="tex2html1"
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HREF="math-atlas.sourceforge.net/">math-atlas.sourceforge.net/</A></TT>)
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may be employed. The reference BLAS from Netlib
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(<TT><A NAME="tex2html2"
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HREF="www.netlib.org/blas">www.netlib.org/blas</A></TT>) are meant to define the standard
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behaviour of the BLAS interface, so they are not optimized for any
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particular plaftorm, and should only be used as a last
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resort. Note that BLAS computations form a relatively small part of
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the MLD2P4/PSBLAS computations; they are however critical when using
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preconditioners based on MUMPS, UMFPACK or SuperLU third party
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libraries. Note that UMFPACK requires a full LAPACK library; our
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experience is that configuring ATLAS for building full LAPACK does not
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work in the correct way. Our advice is first to download the LAPACK tarfile from
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<TT><A NAME="tex2html3"
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HREF="www.netlib.org/lapac">www.netlib.org/lapac</A></TT> and install it independently of ATLAS. In this case,
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you need to modify the OPTS and NOOPT definitions for including -fPIC compilation option
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in the make.inc file of the LAPACK library.
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</DD>
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<DT><STRONG>MPI</STRONG></DT>
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<DD>[<A
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HREF="node28.html#MPI2">19</A>,<A
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HREF="node28.html#MPI1">24</A>] A version of MPI is available on most
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high-performance computing systems.
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</DD>
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<DT><STRONG>PSBLAS</STRONG></DT>
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<DD>[<A
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HREF="node28.html#PSBLASGUIDE">16</A>,<A
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HREF="node28.html#psblas_00">18</A>] Parallel Sparse BLAS (PSBLAS) is
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available from <TT><A NAME="tex2html4"
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HREF="www.ce.uniroma2.it/psblas">www.ce.uniroma2.it/psblas</A></TT>; version
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3.4.0 (or later) is required. Indeed, all the prerequisites
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listed so far are also prerequisites of PSBLAS.
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</DD>
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</DL>
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Please note that the four previous libraries must have Fortran
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interfaces compatible with MLD2P4;
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usually this means that they should all be built with the same
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compiler as MLD2P4.
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<P>
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HREF="node7.html">Optional third party libraries</A>
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<B> Up:</B> <A NAME="tex2html151"
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HREF="node5.html">Configuring and Building MLD2P4</A>
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<B> Previous:</B> <A NAME="tex2html145"
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HREF="node5.html">Configuring and Building MLD2P4</A>
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HREF="node2.html">Contents</A></B>
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