HPL_pdtest man page

HPL_pdtest — Perform one test.


#include "hpl.h"
 void HPL_pdtest( HPL_T_test * TEST, HPL_T_grid * GRID, HPL_T_palg * ALGO, const int N, const int NB );


HPL_pdtest performs  one  test  given a set of parameters such as the process grid, the  problem size, the distribution blocking factor ... This function generates  the data, calls  and times the linear system solver,  checks  the  accuracy  of the  obtained vector solution  and writes this information to the file pointed to by TEST->outfp.


TEST    (global input)          HPL_T_test *

On entry,  TEST  points  to a testing data structure:  outfp specifies the output file where the results will be printed. It is only defined and used by the process  0  of the  grid. thrsh  specifies  the  threshhold value  for the test ratio. Concretely, a test is declared "PASSED"  if and only if  the following inequality is satisfied: ||Ax-b||_oo / ( epsil *
               ( || x ||_oo * || A ||_oo + || b ||_oo ) *
                N )  < thrsh. epsil  is the  relative machine precision of the distributed computer. Finally the test counters, kfail, kpass, kskip and ktest are updated as follows:  if the test passes,  kpass is incremented by one;  if the test fails, kfail is incremented by one; if the test is skipped, kskip is incremented by one. ktest is left unchanged.

GRID    (local input)           HPL_T_grid *

On entry,  GRID  points  to the data structure containing the process grid information.

ALGO    (global input)          HPL_T_palg *

On entry,  ALGO  points to  the data structure containing the algorithmic parameters to be used for this test.

N       (global input)          const int

On entry,  N specifies the order of the coefficient matrix A. N must be at least zero.

NB      (global input)          const int

On entry,  NB specifies the blocking factor used to partition and distribute the matrix A. NB must be larger than one.

See Also

HPL_pddriver (3), HPL_pdinfo (3).


October 26, 2012 HPL 2.1 HPL Library Functions