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<TITLE>HPL_numroc HPL 2.0 Library Functions September 10, 2008</TITLE> |
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<H1>Name</H1> |
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<B>HPL_numroc</B> Compute the local number of row/columns. |
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<H1>Synopsis</H1> |
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<CODE>#include "hpl.h"</CODE><BR><BR> |
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<CODE>int</CODE> |
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<CODE>HPL_numroc(</CODE> |
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<CODE>const int</CODE> |
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<CODE>N</CODE>, |
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<CODE>const int</CODE> |
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<CODE>INB</CODE>, |
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<CODE>const int</CODE> |
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<CODE>NB</CODE>, |
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<CODE>const int</CODE> |
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<CODE>PROC</CODE>, |
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<CODE>const int</CODE> |
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<CODE>SRCPROC</CODE>, |
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<CODE>const int</CODE> |
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<CODE>NPROCS</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_numroc</B> |
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returns the local number of matrix rows/columns process |
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PROC will get if we give out N rows/columns starting from global |
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index 0. |
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<H1>Arguments</H1> |
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<PRE>
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N (input) const int |
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On entry, N specifies the number of rows/columns being dealt |
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out. N must be at least zero. |
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INB (input) const int |
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On entry, INB specifies the size of the first block of the |
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global matrix. INB must be at least one. |
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<PRE>
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NB (input) const int |
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On entry, NB specifies the blocking factor used to partition |
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and distribute the matrix A. NB must be larger than one. |
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<PRE>
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PROC (input) const int |
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On entry, PROC specifies the coordinate of the process whose |
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local portion is determined. PROC must be at least zero and |
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strictly less than NPROCS. |
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SRCPROC (input) const int |
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On entry, SRCPROC specifies the coordinate of the process |
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that possesses the first row or column of the matrix. SRCPROC |
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must be at least zero and strictly less than NPROCS. |
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<PRE>
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NPROCS (input) const int |
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On entry, NPROCS specifies the total number of process rows |
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or columns over which the matrix is distributed. NPROCS must |
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be at least one. |
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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_indxg2l.html">HPL_indxg2l</A>, |
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<A HREF="HPL_indxg2lp.html">HPL_indxg2lp</A>, |
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<A HREF="HPL_indxg2p.html">HPL_indxg2p</A>, |
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<A HREF="HPL_indxl2g.html">HPL_indxl2g</A>, |
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<A HREF="HPL_numrocI.html">HPL_numrocI</A>. |
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