<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 2008 (1.71) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Prerequisites</TITLE> <META NAME="description" CONTENT="Prerequisites"> <META NAME="keywords" CONTENT="userhtml"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2008"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="userhtml.css"> <LINK REL="next" HREF="node7.html"> <LINK REL="previous" HREF="node5.html"> <LINK REL="up" HREF="node5.html"> <LINK REL="next" HREF="node7.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html137" HREF="node7.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html133" HREF="node5.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html127" HREF="node5.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html135" HREF="node2.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html138" HREF="node7.html">Optional third party libraries</A> <B> Up:</B> <A NAME="tex2html134" HREF="node5.html">Configuring and Building MLD2P4</A> <B> Previous:</B> <A NAME="tex2html128" HREF="node5.html">Configuring and Building MLD2P4</A> <B> <A NAME="tex2html136" HREF="node2.html">Contents</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION00051000000000000000"> Prerequisites</A> </H2> <P> The following base libraries are needed: <DL> <DT><STRONG>BLAS</STRONG></DT> <DD>[<A HREF="node25.html#blas3">11</A>,<A HREF="node25.html#blas2">12</A>,<A HREF="node25.html#blas1">18</A>] Many vendors provide optimized versions of the Basic Linear Algebra Subprograms; if no vendor version is available for a given platform, the ATLAS software (<code>http://math-atlas.sourceforge.net/</code>) may be employed. The reference BLAS from Netlib (<code>http://www.netlib.org/blas</code>) are meant to define the standard behaviour of the BLAS interface, so they are not optimized for any particular plaftorm, and should only be used as a last resort. Note that BLAS computations form a relatively small part of the MLD2P4/PSBLAS computations; they are however critical when using preconditioners based on the UMFPACK or SuperLU third party libraries. </DD> <DT><STRONG>MPI</STRONG></DT> <DD>[<A HREF="node25.html#MPI2">17</A>,<A HREF="node25.html#MPI1">22</A>] A version of MPI is available on most high-performance computing systems; only version 1.1 is required. </DD> <DT><STRONG>PSBLAS</STRONG></DT> <DD>[<A HREF="node25.html#PSBLASGUIDE">15</A>,<A HREF="node25.html#psblas_00">16</A>] Parallel Sparse BLAS is available from <BR><code>http://www.ce.uniroma2.it/psblas</code>; version 3.0 (or later) is required. Indeed, all the prerequisites listed so far are also prerequisites of PSBLAS. </DD> </DL> Please note that the four previous libraries must have Fortran interfaces compatible with MLD2P4; usually this means that they should all be built with the same compiler as MLD2P4. <P> <HR> <!--Navigation Panel--> <A NAME="tex2html137" HREF="node7.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html133" HREF="node5.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html127" HREF="node5.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html135" HREF="node2.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html138" HREF="node7.html">Optional third party libraries</A> <B> Up:</B> <A NAME="tex2html134" HREF="node5.html">Configuring and Building MLD2P4</A> <B> Previous:</B> <A NAME="tex2html128" HREF="node5.html">Configuring and Building MLD2P4</A> <B> <A NAME="tex2html136" HREF="node2.html">Contents</A></B> <!--End of Navigation Panel--> </BODY> </HTML>