add ELPA

ChangeLog

@@ -2,6 +2,14 @@
 -Date
 -Name
 -changes
+
+--------------
+Dec 10, 2024
+Name: Xin Jing
+Changes: (linearAlgebra.c, eigenSolver.c, eigenSovlerKpt.c)
+1. Support ELPA 
+2. Fix a bug in initialization
+
 --------------
 Dec 4, 2024
 Name: Lucas Timmerman

src/include/linearAlgebra.h

@@ -145,4 +145,13 @@ void pdgemm_subcomm(
     int *descA, const double *B, int *descB, double beta, double *C, int *descC,
     MPI_Comm comm, int max_nproc);
 
+#ifdef USE_ELPA
+void elpa_pdsygvx(
+	double *a, int desca[9], double *b, int descb[9], int nev, double *ev, double *z, MPI_Comm comm, int *ierr);
+void elpa_pdsyevx(
+	double *a, int desca[9], int nev, double *ev, double *z, MPI_Comm comm, int *ierr);
+void elpa_pzhegvx(
+    double _Complex *a, int desca[9], double _Complex *b, int descb[9], int nev, double *ev, double _Complex *z, MPI_Comm comm, int *ierr);
+#endif
+
 #endif // LINEARALGEBRA_H

src/initialization.c

@@ -429,6 +429,13 @@ void Initialize(SPARC_OBJ *pSPARC, int argc, char *argv[]) {
             if (rank == 0) printf("The dimension of subgrid for eigen sovler is (%d x %d).\n", 
                                     pSPARC->eig_paral_subdims[0], pSPARC->eig_paral_subdims[1]);
         #endif
+
+        #ifdef USE_ELPA
+            // No processor can have zero data in ELPA
+            int maxdim = max(pSPARC->eig_paral_subdims[0], pSPARC->eig_paral_subdims[1]);
+            pSPARC->eig_paral_blksz = max(1,min(pSPARC->Nstates/maxdim, pSPARC->eig_paral_blksz));
+            // if (rank == 0) printf("eig_paral_blksz %d\n", pSPARC->eig_paral_blksz);
+        #endif
         }
     }
 
@@ -2601,6 +2608,14 @@ void SPARC_copy_input(SPARC_OBJ *pSPARC, SPARC_INPUT_OBJ *pSPARC_Input) {
         }
     }
 
+#if defined(USE_ELPA)
+    #if !defined(USE_MKL) && !defined(USE_SCALAPACK)
+        if (rank == 0)
+            printf(RED "ERROR: To use ELPA, please turn on MKL or SCALAPACK in makefile!\n"RESET);
+        exit(EXIT_FAILURE); 
+    #endif
+#endif
+
 #if !defined(USE_MKL) && !defined(USE_FFTW)
     if (pSPARC->ixc[3] != 0){
         if (rank == 0)
@@ -3649,7 +3664,7 @@ void write_output_init(SPARC_OBJ *pSPARC) {
     }
 
     fprintf(output_fp,"***************************************************************************\n");
-    fprintf(output_fp,"*                       SPARC (version Dec 4, 2024)                      *\n");
+    fprintf(output_fp,"*                       SPARC (version Dec 10, 2024)                      *\n");
     fprintf(output_fp,"*   Copyright (c) 2020 Material Physics & Mechanics Group, Georgia Tech   *\n");
     fprintf(output_fp,"*           Distributed under GNU General Public License 3 (GPL)          *\n");
     fprintf(output_fp,"*                   Start time: %s                  *\n",c_time_str);