CheckFindMumps.c
8c0204d66444lammps_2020

CheckFindMumps.c
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			#include <stdio.h>

			#if !defined(MUMPS_SEQ)
			# include <mpi.h>
			#endif

			#define JOB_INIT -1
			#define JOB_END -2
			#define JOB_COMPLETE 6
			#define USE_COMM_WORLD -987654

			#define icntl(n) id.icntl[n - 1]

			int main(int argc, char **argv) {
			int n = 2;
			int nz = 2;

			int irn[2] = {1, 2};
			int jcn[2] = {1, 2};
			Real a[2];
			Real rhs[2];

			#if !defined(MUMPS_SEQ)
			MPI_Init(&argc, &argv);
			#endif

			rhs[0] = 1.0; rhs[1]=4.0;
			a[0] = 1.0; a[1] = 2.0;

			id.job = JOB_INIT;
			id.par = 1;
			id.sym = 0;

			#if !defined(MUMPS_SEQ)
			id.comm_fortran = USE_COMM_WORLD;
			#endif

			mumps_c(&id);

			// Default Scaling
			icntl(8) = 77;

			// Assembled matrix
			icntl(5) = 0;

			/// Default centralized dense second member
			icntl(20) = 0;
			icntl(21) = 0;

			// automatic choice for analysis analysis
			icntl(28) = 0;

			// fully distributed
			icntl(18) = 3;

			id.n = n;

			id.nz_loc = nz;
			id.irn_loc = irn;
			id.jcn_loc = jcn;

			id.a_loc = a;
			id.rhs = rhs;

			icntl(1) = -1;
			icntl(2) = -1;
			icntl(3) = -1;
			icntl(4) = 0;


			id.job = JOB_COMPLETE;
			mumps_c(&id);

			id.job=JOB_END;
			mumps_c(&id);

			printf("Solution is : (%8.2f %8.2f)\n", rhs[0], rhs[1]);

			return 0;
			}