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This commit is contained in:
Salvatore Filippone
+91
-359
@@ -7,8 +7,8 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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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>Utilities</TITLE>
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<META NAME="description" CONTENT="Utilities">
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<TITLE>psb_max -- Global maximum</TITLE>
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<META NAME="description" CONTENT="psb_max -- Global maximum">
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<META NAME="keywords" CONTENT="userhtml">
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<META NAME="resource-type" CONTENT="document">
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<META NAME="distribution" CONTENT="global">
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@@ -20,86 +20,101 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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<LINK REL="next" HREF="node105.html">
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<LINK REL="previous" HREF="node103.html">
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<LINK REL="up" HREF="userhtml.html">
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<LINK REL="up" HREF="node93.html">
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<LINK REL="next" HREF="node105.html">
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</HEAD>
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<BODY >
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<!--Navigation Panel-->
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<A NAME="tex2html1513"
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<A NAME="tex2html1536"
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HREF="node105.html">
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<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A>
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<A NAME="tex2html1509"
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HREF="userhtml.html">
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<A NAME="tex2html1532"
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HREF="node93.html">
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<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A>
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<A NAME="tex2html1503"
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<A NAME="tex2html1526"
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HREF="node103.html">
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<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A>
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<A NAME="tex2html1511"
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<A NAME="tex2html1534"
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HREF="node1.html">
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<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
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<BR>
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<B> Next:</B> <A NAME="tex2html1514"
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HREF="node105.html">Preconditioner routines</A>
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<B> Up:</B> <A NAME="tex2html1510"
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HREF="userhtml.html">userhtml</A>
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<B> Previous:</B> <A NAME="tex2html1504"
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HREF="node103.html">Error handling</A>
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<B> <A NAME="tex2html1512"
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<B> Next:</B> <A NAME="tex2html1537"
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HREF="node105.html">psb_min Global</A>
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<B> Up:</B> <A NAME="tex2html1533"
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HREF="node93.html">Parallel environment routines</A>
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<B> Previous:</B> <A NAME="tex2html1527"
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HREF="node103.html">psb_sum Global</A>
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<B> <A NAME="tex2html1535"
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HREF="node1.html">Contents</A></B>
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<BR>
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<BR>
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<!--End of Navigation Panel-->
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<H1><A NAME="SECTION000100000000000000000"></A>
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<A NAME="sec:util"></A>
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<BR>
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Utilities
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</H1>
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<H2><A NAME="SECTION000811000000000000000">
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psb_max -- Global maximum</A>
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</H2>
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<P>
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We have some utitlities available for input and output of
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sparsematrices; the interfaces to these routines are available in the
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module <code>psb_util_mod</code>.
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<P>
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ifstarsubroutinesubroutinehb_readRead a sparse matrix from a file in the
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Harwell-Boeing format
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<P>
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<BR>
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<IMG
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WIDTH="461" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
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SRC="img149.png"
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ALT="\begin{lstlisting}
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call hb_read(a, iret, iunit, filename, b, mtitle)
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\end{lstlisting}">
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<BR>
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<PRE>
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call psb_max(icontxt, dat, root)
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</PRE>
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<P>
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This subroutine implements a maximum valuereduction
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operation based on the underlying communication library.
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Asynchronous.
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<DD>Synchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>filename</STRONG></DT>
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<DD>The name of the file to be read.
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<DT><STRONG>icontxt</STRONG></DT>
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<DD>the communication context identifying the virtual
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parallel machine.
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<BR>
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Type:<B>optional</B>.
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Scope: <B>global</B>.
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<BR>
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Specified as: a character variable containing a valid file name, or
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<code>-</code>, in which case the default input unit 5 (i.e. standard input
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in Unix jargon) is used. Default: <code>-</code>.
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Type: <B>required</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer variable.
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</DD>
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<DT><STRONG>iunit</STRONG></DT>
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<DD>The Fortran file unit number.
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<DT><STRONG>dat</STRONG></DT>
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<DD>The local contribution to the global maximum.
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<BR>
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Type:<B>optional</B>.
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Scope: <B>local</B>.
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<BR>
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Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
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Type: <B>required</B>.
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<BR>
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Intent: <B>inout</B>.
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<BR>
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Specified as: an integer or real variable, which may be a
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scalar, or a rank 1 or 2 array. Type, kind, rank and size must agree on all processes.
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</DD>
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<DT><STRONG>root</STRONG></DT>
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<DD>Process to hold the final maximum, or <IMG
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WIDTH="25" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img79.png"
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ALT="$-1$"> to make it available
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on all processes.
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<BR>
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Scope: <B>global</B>.
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<BR>
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Type: <B>optional</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer value <!-- MATH
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$-1<= root <= np-1$
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-->
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<IMG
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WIDTH="166" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img133.png"
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ALT="$-1<= root <= np-1$">, default -1.
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<BR></DD>
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</DL>
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<P>
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@@ -107,338 +122,55 @@ Specified as: an integer value. Only meaningful if filename is not <code>-</code
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>a</STRONG></DT>
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<DD>the sparse matrix read from file.
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<DT><STRONG>dat</STRONG></DT>
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<DD>On destination process(es), the result of the maximum operation.
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<BR>
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Type:<B>required</B>.
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Scope: <B>global</B>.
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<BR>
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Specified as: a structured data of type spdata<TT>psb_Tspmat_type</TT>.
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</DD>
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<DT><STRONG>b</STRONG></DT>
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<DD>Rigth hand side(s).
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Type: <B>required</B>.
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<BR>
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Type: <B>Optional</B>
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Intent: <B>in</B>.
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<BR>
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An array of type real or complex, rank 2 and having the ALLOCATABLE
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attribute; will be allocated and filled in if the input file contains
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a right hand side, otherwise will be left in the UNALLOCATED state.
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</DD>
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<DT><STRONG>mtitle</STRONG></DT>
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<DD>Matrix title.
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<BR>
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Type: <B>Optional</B>
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<BR>
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A charachter variable of length 72 holding a copy of the
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matrix title as specified by the Harwell-Boeing format and contained
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in the input file.
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</DD>
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<DT><STRONG>iret</STRONG></DT>
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<DD>Error code.
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<BR>
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Type: <B>required</B>
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<BR>
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An integer value; 0 means no error has been detected.
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Specified as: an integer or real variable, which may be a
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scalar, or a rank 1 or 2 array. Type, kind, rank and size must agree on all processes.
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</DD>
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</DL>
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<P>
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ifstarsubroutinesubroutinehb_writeWrite a sparse matrix to a file
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in the Harwell-Boeing format
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<FONT SIZE="+1"><B>Notes</B></FONT>
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<P>
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<BR>
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<IMG
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WIDTH="537" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
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SRC="img150.png"
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ALT="\begin{lstlisting}
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call hb_write(a, iret, iunit, filename, key, rhs, mtitle)
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\end{lstlisting}">
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<BR>
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<P>
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Asynchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>a</STRONG></DT>
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<DD>the sparse matrix to be written.
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<BR>
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Type:<B>required</B>.
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<BR>
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Specified as: a structured data of type spdata<TT>psb_Tspmat_type</TT>.
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</DD>
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<DT><STRONG>b</STRONG></DT>
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<DD>Rigth hand side.
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<BR>
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Type: <B>Optional</B>
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<BR>
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An array of type real or complex, rank 1 and having the ALLOCATABLE
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attribute; will be allocated and filled in if the input file contains
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a right hand side.
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</DD>
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<DT><STRONG>filename</STRONG></DT>
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<DD>The name of the file to be written to.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: a character variable containing a valid file name, or
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<code>-</code>, in which case the default output unit 6 (i.e. standard output
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in Unix jargon) is used. Default: <code>-</code>.
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</DD>
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<DT><STRONG>iunit</STRONG></DT>
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<DD>The Fortran file unit number.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
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</DD>
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<DT><STRONG>key</STRONG></DT>
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<DD>Matrix key.
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<BR>
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Type: <B>Optional</B>
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<BR>
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A charachter variable of length 8 holding the
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matrix key as specified by the Harwell-Boeing format and to be
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written to file.
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</DD>
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<DT><STRONG>mtitle</STRONG></DT>
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<DD>Matrix title.
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<BR>
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Type: <B>Optional</B>
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<BR>
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A charachter variable of length 72 holding the
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matrix title as specified by the Harwell-Boeing format and to be
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written to file.
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</DD>
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</DL>
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<P>
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<DL>
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>iret</STRONG></DT>
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<DD>Error code.
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<BR>
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Type: <B>required</B>
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<BR>
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An integer value; 0 means no error has been detected.
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</DD>
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</DL>
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<P>
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ifstarsubroutinesubroutinemm_mat_readRead a sparse matrix from a
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file in the MatrixMarket format
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<P>
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<BR>
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<IMG
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WIDTH="394" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
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SRC="img151.png"
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ALT="\begin{lstlisting}
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call mm_mat_read(a, iret, iunit, filename)
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\end{lstlisting}">
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<BR>
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<P>
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Asynchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>filename</STRONG></DT>
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<DD>The name of the file to be read.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: a character variable containing a valid file name, or
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<code>-</code>, in which case the default input unit 5 (i.e. standard input
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in Unix jargon) is used. Default: <code>-</code>.
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</DD>
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<DT><STRONG>iunit</STRONG></DT>
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<DD>The Fortran file unit number.
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<BR>
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Type:<B>optional</B>.
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<BR>
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Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
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</DD>
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</DL>
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<P>
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<DL>
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>a</STRONG></DT>
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<DD>the sparse matrix read from file.
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<BR>
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Type:<B>required</B>.
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<BR>
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Specified as: a structured data of type spdata<TT>psb_Tspmat_type</TT>.
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</DD>
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<DT><STRONG>iret</STRONG></DT>
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<DD>Error code.
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<BR>
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Type: <B>required</B>
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<BR>
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An integer value; 0 means no error has been detected.
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</DD>
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</DL>
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<P>
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ifstarsubroutinesubroutinemm_vet_readRead a dense vector from a
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file in the MatrixMarket format
|
||||
<BR>
|
||||
<IMG
|
||||
WIDTH="394" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img152.png"
|
||||
ALT="\begin{lstlisting}
|
||||
call mm_vet_read(b, iret, iunit, filename)
|
||||
\end{lstlisting}">
|
||||
<BR>
|
||||
|
||||
<P>
|
||||
<DL>
|
||||
<DT><STRONG>Type:</STRONG></DT>
|
||||
<DD>Asynchronous.
|
||||
</DD>
|
||||
<DT><STRONG><B>On Entry </B></STRONG></DT>
|
||||
<DD>
|
||||
</DD>
|
||||
<DT><STRONG>filename</STRONG></DT>
|
||||
<DD>The name of the file to be read.
|
||||
<BR>
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Specified as: a character variable containing a valid file name, or
|
||||
<code>-</code>, in which case the default input unit 5 (i.e. standard input
|
||||
in Unix jargon) is used. Default: <code>-</code>.
|
||||
</DD>
|
||||
<DT><STRONG>iunit</STRONG></DT>
|
||||
<DD>The Fortran file unit number.
|
||||
<BR>
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
|
||||
</DD>
|
||||
</DL>
|
||||
|
||||
<P>
|
||||
<DL>
|
||||
<DT><STRONG><B>On Return</B></STRONG></DT>
|
||||
<DD>
|
||||
</DD>
|
||||
<DT><STRONG>b</STRONG></DT>
|
||||
<DD>Rigth hand side(s).
|
||||
<BR>
|
||||
Type: <B>required</B>
|
||||
<BR>
|
||||
An array of type real or complex, rank 2 and having the ALLOCATABLE
|
||||
attribute; will be allocated and filled in if the input file contains
|
||||
a right hand side, otherwise will be left in the UNALLOCATED state.
|
||||
</DD>
|
||||
<DT><STRONG>iret</STRONG></DT>
|
||||
<DD>Error code.
|
||||
<BR>
|
||||
Type: <B>required</B>
|
||||
<BR>
|
||||
An integer value; 0 means no error has been detected.
|
||||
</DD>
|
||||
</DL>
|
||||
|
||||
<P>
|
||||
ifstarsubroutinesubroutinemm_mat_writeWrite a sparse matrix to a
|
||||
file in the MatrixMarket format
|
||||
<BR>
|
||||
<IMG
|
||||
WIDTH="480" HEIGHT="16" ALIGN="BOTTOM" BORDER="0"
|
||||
SRC="img153.png"
|
||||
ALT="\begin{lstlisting}
|
||||
call mm_mat_write(a, mtitle, iret, iunit, filename)
|
||||
\end{lstlisting}">
|
||||
<BR>
|
||||
<DL>
|
||||
<DT><STRONG>Type:</STRONG></DT>
|
||||
<DD>Asynchronous.
|
||||
</DD>
|
||||
<DT><STRONG><B>On Entry </B></STRONG></DT>
|
||||
<DD>
|
||||
</DD>
|
||||
<DT><STRONG>a</STRONG></DT>
|
||||
<DD>the sparse matrix to be written.
|
||||
<BR>
|
||||
Type:<B>required</B>.
|
||||
<BR>
|
||||
Specified as: a structured data of type spdata<TT>psb_Tspmat_type</TT>.
|
||||
</DD>
|
||||
<DT><STRONG>mtitle</STRONG></DT>
|
||||
<DD>Matrix title.
|
||||
<BR>
|
||||
Type: <B>required</B>
|
||||
<BR>
|
||||
A charachter variable holding a descriptive title for the matrix to be
|
||||
written to file.
|
||||
</DD>
|
||||
<DT><STRONG>filename</STRONG></DT>
|
||||
<DD>The name of the file to be written to.
|
||||
<BR>
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Specified as: a character variable containing a valid file name, or
|
||||
<code>-</code>, in which case the default output unit 6 (i.e. standard output
|
||||
in Unix jargon) is used. Default: <code>-</code>.
|
||||
</DD>
|
||||
<DT><STRONG>iunit</STRONG></DT>
|
||||
<DD>The Fortran file unit number.
|
||||
<BR>
|
||||
Type:<B>optional</B>.
|
||||
<BR>
|
||||
Specified as: an integer value. Only meaningful if filename is not <code>-</code>.
|
||||
</DD>
|
||||
</DL>
|
||||
|
||||
<P>
|
||||
<DL>
|
||||
<DT><STRONG><B>On Return</B></STRONG></DT>
|
||||
<DD>
|
||||
</DD>
|
||||
<DT><STRONG>iret</STRONG></DT>
|
||||
<DD>Error code.
|
||||
<BR>
|
||||
Type: <B>required</B>
|
||||
<BR>
|
||||
An integer value; 0 means no error has been detected.
|
||||
</DD>
|
||||
</DL>
|
||||
<OL>
|
||||
<LI>The <code>dat</code> argument is both input and output, and its
|
||||
value may be changed even on processes different from the final
|
||||
result destination.
|
||||
</LI>
|
||||
<LI>The <code>dat</code> argument may also be a long integer scalar.
|
||||
</LI>
|
||||
</OL>
|
||||
|
||||
<P>
|
||||
<HR>
|
||||
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|
||||
<A NAME="tex2html1513"
|
||||
<A NAME="tex2html1536"
|
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|
||||
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HREF="node93.html">
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<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
|
||||
<BR>
|
||||
<B> Next:</B> <A NAME="tex2html1514"
|
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HREF="node105.html">Preconditioner routines</A>
|
||||
<B> Up:</B> <A NAME="tex2html1510"
|
||||
HREF="userhtml.html">userhtml</A>
|
||||
<B> Previous:</B> <A NAME="tex2html1504"
|
||||
HREF="node103.html">Error handling</A>
|
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<B> <A NAME="tex2html1512"
|
||||
<B> Next:</B> <A NAME="tex2html1537"
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HREF="node105.html">psb_min Global</A>
|
||||
<B> Up:</B> <A NAME="tex2html1533"
|
||||
HREF="node93.html">Parallel environment routines</A>
|
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<B> Previous:</B> <A NAME="tex2html1527"
|
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HREF="node103.html">psb_sum Global</A>
|
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<B> <A NAME="tex2html1535"
|
||||
HREF="node1.html">Contents</A></B>
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|
||||
|
||||
Reference in New Issue
Block a user