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<B> Next:</B> <A NAME="tex2html2528" HREF="node34.html">Initialize the Process Grid</A>
<B>Up:</B> <A NAME="tex2html2526" HREF="node25.html">Getting Started with ScaLAPACK</A>
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<H1><A NAME="SECTION04240000000000000000">Four Basic Steps Required to Call a ScaLAPACK Routine</A></H1>
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<A NAME="basicsteps"> </A>
<P>
Four basic steps are required to call a ScaLAPACK routine.
<OL>
<LI> Initialize the process grid
<LI> Distribute the matrix on the process grid
<LI> Call ScaLAPACK routine
<LI> Release the process grid
</OL>
<P>
Each of these steps is detailed below. The example program in
section <A HREF="node28.html#example1">2.3</A> illustrates these basic requirements. Refer
to section <A HREF="node30.html#secvariables">2.3.2</A> for an explanation of notational variables.
<P>
For more information on the BLACS routines called in this program, and
more specifically their calling sequences, please refer to
Appendix <A HREF="node185.html#chapqrefblacs">D.3</A>, [<A HREF="node189.html#lawn94">54</A>], and
the BLACS homepage<A NAME="792"> </A> <BR>
(<TT>http://www.netlib.org/blacs/index.html</TT>). Further details of
the matrix distribution and storage scheme can be found in
Chapter <A HREF="node68.html#chap2dbsd">4</A> and section <A HREF="node76.html#seclocalstorage">4.3.2</A>.
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<UL><A NAME="CHILD_LINKS"> </A>
<LI> <A NAME="tex2html2531" HREF="node34.html#SECTION04241000000000000000">Initialize the Process Grid</A>
<LI> <A NAME="tex2html2532" HREF="node35.html#SECTION04242000000000000000">Distribute the Matrix on the Process Grid</A>
<LI> <A NAME="tex2html2533" HREF="node36.html#SECTION04243000000000000000">Call the ScaLAPACK Routine</A>
<LI> <A NAME="tex2html2534" HREF="node37.html#SECTION04244000000000000000">Release the Process Grid</A>
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<P><ADDRESS>
<I>Susan Blackford <BR>
Tue May 13 09:21:01 EDT 1997</I>
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