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197 lines
5.6 KiB
HTML
197 lines
5.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<!--Converted with LaTeX2HTML 2008 (1.71)
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original version by: Nikos Drakos, CBLU, University of Leeds
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<HTML>
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<HEAD>
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<TITLE>Library contents</TITLE>
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<B> Next:</B> <A NAME="tex2html223"
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HREF="node6.html">Application structure</A>
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HREF="node3.html">General overview</A>
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HREF="node4.html">Basic Nomenclature</A>
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<B> <A NAME="tex2html221"
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<BR>
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<BR>
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<H2><A NAME="SECTION00032000000000000000">
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Library contents</A>
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</H2>
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<P>
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The PSBLAS library consists of various classes of subroutines:
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<DL>
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<DT><STRONG>Computational routines</STRONG></DT>
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<DD>comprising:
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<UL>
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<LI>Sparse matrix by dense matrix product;
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</LI>
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<LI>Sparse triangular
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systems solution for block diagonal matrices;
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</LI>
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<LI>Vector and matrix norms;
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</LI>
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<LI>Dense matrix sums;
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</LI>
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<LI>Dot products.
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</LI>
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</UL>
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</DD>
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<DT><STRONG>Communication routines</STRONG></DT>
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<DD>handling halo and overlap
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communications;
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</DD>
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<DT><STRONG>Data management and auxiliary routines</STRONG></DT>
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<DD>including:
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<UL>
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<LI>Parallel environment management
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</LI>
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<LI>Communication descriptors allocation;
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</LI>
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<LI>Dense and sparse matrix allocation;
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</LI>
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<LI>Dense and sparse matrix build and update;
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</LI>
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<LI>Sparse matrix and data distribution preprocessing.
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</LI>
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</UL>
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</DD>
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<DT><STRONG>Preconditioner routines</STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>Iterative methods</STRONG></DT>
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<DD>a subset of Krylov subspace iterative
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methods
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</DD>
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</DL>
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The following naming scheme has been adopted for all the symbols
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internally defined in the PSBLAS software package:
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<UL>
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<LI>all the symbols (i.e. subroutine names, data types...) are
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prefixed by <code>psb_</code>
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</LI>
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<LI>all the data type names are suffixed by <code>_type</code>
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</LI>
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<LI>all the constant values are suffixed by <code>_</code>
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</LI>
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<LI>all the subroutine names follow the rule <code>psb_xxname</code> where
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<code>xx</code> can be either:
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<UL>
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<LI><code>ge</code>: the routine is related to dense data,
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</LI>
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<LI><code>sp</code>: the routine is related to sparse data,
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</LI>
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<LI><code>cd</code>: the routine is related to communication descriptor
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(see <A HREF="node8.html#sec:datastruct">3</A>).
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</LI>
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</UL>
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For example the <code>psb_geins</code>, <code>psb_spins</code> and
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<code>psb_cdins</code> perform the same action (see <A HREF="node44.html#sec:toolsrout">6</A>) on
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dense matrices, sparse matrices and communication descriptors
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respectively.
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Interface overloading allows the usage of the same subroutine
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interfaces for both real and complex data.
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</LI>
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</UL>
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In the description of the subroutines, arguments or argument entries
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are classified as:
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<DL>
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<DT><STRONG>global</STRONG></DT>
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<DD>For input arguments, the value must be the same on all processes
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participating in the subroutine call; for output arguments the value
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is guaranteed to be the same.
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</DD>
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<DT><STRONG>local</STRONG></DT>
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<DD>Each process has its own value(s) independently.
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</DD>
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</DL>
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To finish our general description, we define a version string with the
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constant
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<BR><P></P>
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<DIV ALIGN="CENTER">
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<!-- MATH
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\begin{displaymath}
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\verb|psb_version_string_|
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\end{displaymath}
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-->
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<IMG
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WIDTH="158" HEIGHT="28" BORDER="0"
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SRC="img14.png"
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ALT="\begin{displaymath}\verb\vert psb_version_string_\vert\end{displaymath}">
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</DIV>
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<BR CLEAR="ALL">
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<P></P>
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whose current value is <code>3.0.0</code>
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<P>
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<HR>
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<BR>
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<B> Next:</B> <A NAME="tex2html223"
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HREF="node6.html">Application structure</A>
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<B> Up:</B> <A NAME="tex2html219"
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HREF="node3.html">General overview</A>
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<B> Previous:</B> <A NAME="tex2html213"
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HREF="node4.html">Basic Nomenclature</A>
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<B> <A NAME="tex2html221"
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HREF="node1.html">Contents</A></B>
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