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<TITLE>HPL_pdmatgen HPL 2.0 Library Functions September 10, 2008</TITLE> |
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<BODY BGCOLOR="WHITE" TEXT = "#000000" LINK = "#0000ff" VLINK = "#000099" |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_pdmatgen</B> Parallel random matrix generator. |
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<H1>Synopsis</H1> |
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<CODE>#include "hpl.h"</CODE><BR><BR> |
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<CODE>void</CODE> |
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<CODE>HPL_pdmatgen(</CODE> |
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<CODE>const HPL_T_grid *</CODE> |
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<CODE>GRID</CODE>, |
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<CODE>const int</CODE> |
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<CODE>M</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>NB</CODE>, |
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<CODE>double *</CODE> |
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<CODE>A</CODE>, |
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<CODE>const int</CODE> |
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<CODE>LDA</CODE>, |
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<CODE>const int</CODE> |
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<CODE>ISEED</CODE> |
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<CODE>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_pdmatgen</B> |
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generates (or regenerates) a parallel random matrix A. |
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The pseudo-random generator uses the linear congruential algorithm: |
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X(n+1) = (a * X(n) + c) mod m as described in the Art of Computer |
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Programming, Knuth 1973, Vol. 2. |
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<H1>Arguments</H1> |
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<PRE>
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GRID (local input) const HPL_T_grid * |
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On entry, GRID points to the data structure containing the |
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process grid information. |
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<PRE>
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M (global input) const int |
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On entry, M specifies the number of rows of the matrix A. |
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M must be at least zero. |
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</PRE>
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<PRE>
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N (global input) const int |
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On entry, N specifies the number of columns of the matrix A. |
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N must be at least zero. |
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</PRE>
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NB (global 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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<PRE>
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A (local output) double * |
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On entry, A points to an array of dimension (LDA,LocQ(N)). |
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On exit, this array contains the coefficients of the randomly |
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generated matrix. |
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</PRE>
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<PRE>
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LDA (local input) const int |
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On entry, LDA specifies the leading dimension of the array A. |
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LDA must be at least max(1,LocP(M)). |
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</PRE>
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<PRE>
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ISEED (global input) const int |
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On entry, ISEED specifies the seed number to generate the |
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matrix A. ISEED must be at least zero. |
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</PRE>
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<H1>See Also</H1> |
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<A HREF="HPL_ladd.html">HPL_ladd</A>, |
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<A HREF="HPL_lmul.html">HPL_lmul</A>, |
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<A HREF="HPL_setran.html">HPL_setran</A>, |
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<A HREF="HPL_xjumpm.html">HPL_xjumpm</A>, |
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<A HREF="HPL_jumpit.html">HPL_jumpit</A>, |
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<A HREF="HPL_drand.html">HPL_drand</A>. |
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