Memory leaks while using Intel MKL DSS subroutines

vijay1 — Thu, 12 Jul 2012 19:29:19 GMT

Hello,

I am using Intel MKL DSS subroutines to solve a sparse symmetric matrix. Attached is the sample program that I ran. I get memory leaks at the end of the application run. Do I need to use some function in addition to dss_delete() to clean up memory used by DSS subroutines. Please help!

Thanks,

Vijay

********************************************************************************

* Content : MKL DSS C example

********************************************************************************

** Example program to solve symmetric positive definite system of equations.

#include

using namespace std;

#include "mkl_dss.h"

#include "mkl_types.h"

** Define the array and rhs vectors

#define NROWS 5

#define NCOLS 5

#define NNONZEROS 9

#define NRHS 1

static const MKL_INT nRows = NROWS;

static const MKL_INT nCols = NCOLS;

static const MKL_INT nNonZeros = NNONZEROS;

static const MKL_INT nRhs = NRHS;

static _INTEGER_t rowIndex[NROWS + 1] = { 1, 6, 7, 8, 9, 10 };

static _INTEGER_t columns[NNONZEROS] = { 1, 2, 3, 4, 5, 2, 3, 4, 5 };

static _DOUBLE_PRECISION_t values[NNONZEROS] =

{ 9, 1.5, 6, .75, 3, 0.5, 12, .625, 16 };

static _DOUBLE_PRECISION_t rhs[NCOLS] = { 1, 2, 3, 4, 5 };

MKL_INT

main ()

{

#ifdef _DEBUG

_CrtMemState MemState;

_CrtMemCheckpoint(&MemState);

// Use this method to check for memory leaks:

// If you get the following leak message upon closing the app:

// {204} normal block at 0x002F5610, 24 bytes long.

// Data: < c/ Xb/ d/ > 08 63 2F 00 58 62 2F 00 10 64 2F 00 CD CD CD CD

// Then you should call:

//_CrtSetBreakAlloc(4872L);

//_CrtSetBreakAlloc(1000);

//_CrtSetBreakAlloc(3411);

_CrtSetBreakAlloc(215);

#endif

MKL_INT i;

/* Allocate storage for the solver handle and the right-hand side. */

_DOUBLE_PRECISION_t solValues[NROWS];

_MKL_DSS_HANDLE_t handle;

_INTEGER_t error;

_CHARACTER_t statIn[] = "determinant";

_DOUBLE_PRECISION_t statOut[5];

MKL_INT opt = MKL_DSS_DEFAULTS;

MKL_INT sym = MKL_DSS_SYMMETRIC;

MKL_INT type = MKL_DSS_POSITIVE_DEFINITE;

/* --------------------- */

/* Initialize the solver */

/* --------------------- */

error = dss_create (handle, opt);

if (error != MKL_DSS_SUCCESS)

goto printError;

/* ------------------------------------------- */

/* Define the non-zero structure of the matrix */

/* ------------------------------------------- */

error = dss_define_structure (handle, sym, rowIndex, nRows, nCols,

columns, nNonZeros);

if (error != MKL_DSS_SUCCESS)

goto printError;

/* ------------------ */

/* Reorder the matrix */

/* ------------------ */

error = dss_reorder (handle, opt, 0);

if (error != MKL_DSS_SUCCESS)

goto printError;

/* ------------------ */

/* Factor the matrix */

/* ------------------ */

error = dss_factor_real (handle, type, values);

if (error != MKL_DSS_SUCCESS)

goto printError;

/* ------------------------ */

/* Get the solution vector */

/* ------------------------ */

error = dss_solve_real (handle, opt, rhs, nRhs, solValues);

if (error != MKL_DSS_SUCCESS)

goto printError;

/* ------------------------ */

/* Get the determinant (not for a diagonal matrix) */

/*--------------------------*/

if (nRows < nNonZeros)

{

error = dss_statistics (handle, opt, statIn, statOut);

if (error != MKL_DSS_SUCCESS)

goto printError;

/*-------------------------*/

/* print determinant */

/*-------------------------*/

printf (" determinant power is %g \\n", statOut[0]);

printf (" determinant base is %g \\n", statOut[1]);

printf (" Determinant is %g \\n", (pow (10.0, statOut[0])) * statOut[1]);

}

/* -------------------------- */

/* Deallocate solver storage */

/* -------------------------- */

error = dss_delete (handle, opt);

if (error != MKL_DSS_SUCCESS)

goto printError;

/* ---------------------- */

/* Print solution vector */

/* ---------------------- */

printf (" Solution array: ");

for (i = 0; i < nCols; i++)

printf (" %g", solValues);

printf ("\\n");

#ifdef _DEBUG

_CrtMemDumpAllObjectsSince(&MemState);

//_CrtDumpMemoryLeaks();

#endif

exit (0);

printError:

printf ("Solver returned error code %d\\n", error);

exit (1);

}

Memory leaks while using Intel MKL DSS subroutines

Gennady_F_Intel — Fri, 13 Jul 2012 00:54:04 GMT

this is the expected behaviour - please check with user's guide - "Using memory management"

topic Memory leaks while using Intel MKL DSS subroutines in Intel® oneAPI Math Kernel Library

Memory leaks while using Intel MKL DSS subroutines

Memory leaks while using Intel MKL DSS subroutines