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<TITLE>HPL_pdtest HPL 2.0 Library Functions September 10, 2008</TITLE> |
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ALINK = "#ffff00"> |
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<H1>Name</H1> |
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<B>HPL_pdtest</B> Perform one test. |
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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_pdtest(</CODE> |
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<CODE>HPL_T_test *</CODE> |
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<CODE>TEST</CODE>, |
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<CODE>HPL_T_grid *</CODE> |
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<CODE>GRID</CODE>, |
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<CODE>HPL_T_palg *</CODE> |
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<CODE>ALGO</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>);</CODE> |
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<H1>Description</H1> |
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<B>HPL_pdtest</B> |
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performs one test given a set of parameters such as the |
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process grid, the problem size, the distribution blocking factor ... |
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This function generates the data, calls and times the linear system |
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solver, checks the accuracy of the obtained vector solution and |
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writes this information to the file pointed to by TEST->outfp.
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<H1>Arguments</H1> |
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<PRE>
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TEST (global input) HPL_T_test * |
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On entry, TEST points to a testing data structure: outfp |
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specifies the output file where the results will be printed. |
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It is only defined and used by the process 0 of the grid. |
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thrsh specifies the threshhold value for the test ratio. |
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Concretely, a test is declared "PASSED" if and only if the |
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following inequality is satisfied: |
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||Ax-b||_oo / ( epsil * |
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( || x ||_oo * || A ||_oo + || b ||_oo ) * |
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N ) < thrsh.
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epsil is the relative machine precision of the distributed |
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computer. Finally the test counters, kfail, kpass, kskip and |
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ktest are updated as follows: if the test passes, kpass is |
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incremented by one; if the test fails, kfail is incremented |
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by one; if the test is skipped, kskip is incremented by one. |
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ktest is left unchanged. |
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<PRE>
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GRID (local input) 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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ALGO (global input) HPL_T_palg * |
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On entry, ALGO points to the data structure containing the |
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algorithmic parameters to be used for this test. |
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<PRE>
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N (global input) const int |
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On entry, N specifies the order of the coefficient 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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<H1>See Also</H1> |
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<A HREF="HPL_pddriver.html">HPL_pddriver</A>, |
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<A HREF="HPL_pdinfo.html">HPL_pdinfo</A>. |
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