Visible to Intel only — GUID: GUID-D5EC768D-AB3E-402C-A620-D49A7FE74321
Visible to Intel only — GUID: GUID-D5EC768D-AB3E-402C-A620-D49A7FE74321
dcg_init
Initializes the solver.
Syntax
dcg_init(n, x, b, RCI_request, ipar, dpar, tmp)
Include Files
- Fortran: mkl_rci.fi, mkl_rci.f90
Description
The routine dcg_initinitializes the solver. After initialization, all subsequent invocations of the Intel® oneAPI Math Kernel Library (oneMKL) RCI CG routines use the values of all parameters returned by the routinedcg_init. Advanced users can skip this step and set the values in the ipar and dpar arrays directly.
You can modify the contents of these arrays after they are passed to the solver routine only if you are sure that the values are correct and consistent. You can perform a basic check for correctness and consistency by calling the dcg_check routine, but it does not guarantee that the method will work correctly.
Input Parameters
- n
-
INTEGER. Sets the size of the problem.
- x
-
DOUBLE PRECISION. Array of size n. Contains the initial approximation to the solution vector. Normally it is equal to 0 or to b.
- b
-
DOUBLE PRECISION. Array of size n. Contains the right-hand side vector.
Output Parameters
- RCI_request
-
INTEGER. Gives information about the result of the routine.
- ipar
-
INTEGER . Array of size 128. Refer to the CG Common Parameters.
- dpar
-
DOUBLE PRECISION. Array of size 128. Refer to the CG Common Parameters.
- tmp
-
DOUBLE PRECISION . Array of size (n,4). Refer to the CG Common Parameters.
Return Values
- RCI_request= 0
-
Indicates that the task completed normally.
- RCI_request= -10000
-
Indicates failure to complete the task.