/** Within CART_COMM, processes find about their new rank numbers, their cartesian coordinates,
and their neighbors */
inline void VCtopology3D::setup_vctopology(MPI_Comm old_comm) {
// create a matrix with ranks, and neighbours for fields
MPI_Cart_create(old_comm, 3, divisions, periods, reorder, &CART_COMM);
// create a matrix with ranks, and neighbours for Particles
MPI_Cart_create(old_comm, 3, divisions, periods_P, reorder, &CART_COMM_P);
// field Communicator
if (CART_COMM != MPI_COMM_NULL) {
MPI_Comm_rank(CART_COMM, &cartesian_rank);
MPI_Comm_size(CART_COMM, &nproc);
MPI_Cart_coords(CART_COMM, cartesian_rank, 3, coordinates);
MPI_Cart_shift(CART_COMM, XDIR, RIGHT, &xleft_neighbor, &xright_neighbor);
MPI_Cart_shift(CART_COMM, YDIR, RIGHT, &yleft_neighbor, &yright_neighbor);
MPI_Cart_shift(CART_COMM, ZDIR, RIGHT, &zleft_neighbor, &zright_neighbor);
}
else {
// EXCEPTION
cout << "A process is trown away from the new topology for fields. VCtopology3D.h" << endl;
}
// Particles Communicator
if (CART_COMM_P != MPI_COMM_NULL) {
MPI_Comm_rank(CART_COMM_P, &cartesian_rank);
MPI_Comm_size(CART_COMM, &nproc);
MPI_Cart_coords(CART_COMM_P, cartesian_rank, 3, coordinates);
MPI_Cart_shift(CART_COMM_P, XDIR, RIGHT, &xleft_neighbor_P, &xright_neighbor_P);
MPI_Cart_shift(CART_COMM_P, YDIR, RIGHT, &yleft_neighbor_P, &yright_neighbor_P);
MPI_Cart_shift(CART_COMM_P, ZDIR, RIGHT, &zleft_neighbor_P, &zright_neighbor_P);
}
else {
// EXCEPTION
cout << "A process is trown away from the new topology for Particles. VCtopology3D.h" << endl;
}
}
/**
* Creates a Cartesian communicator of size c_dims[0]xc_dims[1] from its input.
* If c_dims[0]xc_dims[1] would not match the size of in_comm, then the function prints
* an error and automatically sets c_dims to the correct values.
*
* @param in_comm Input MPI communicator handle
* @param c_dims A 2D integer array, which sets the size of the Cartesian array to c_dims[0]xc_dims[1]
* @param c_comm A pointer to the Cartesian communicator which will be created
*/
void accfft_create_comm(MPI_Comm in_comm,int * c_dims,MPI_Comm *c_comm){
int nprocs, procid;
MPI_Comm_rank(in_comm, &procid);
MPI_Comm_size(in_comm, &nprocs);
if(c_dims[0]*c_dims[1]!=nprocs){
PCOUT<<"ERROR c_dims!=nprocs --> "<<c_dims[0]<<"*"<<c_dims[1]<<" !="<<nprocs<<std::endl;
c_dims[0]=0;c_dims[1]=0;
MPI_Dims_create(nprocs,2, c_dims);
//std::swap(c_dims[0],c_dims[1]);
PCOUT<<"Switching to c_dims_0="<< c_dims[0]<<" , c_dims_1="<<c_dims[1]<<std::endl;
}
/* Create Cartesian Communicator */
int period[2], reorder;
int coord[2];
period[0]=0; period[1]=0;
reorder=1;
MPI_Cart_create(in_comm, 2, c_dims, period, reorder, c_comm);
//PCOUT<<"dim[0]= "<<c_dims[0]<<" dim[1]= "<<c_dims[1]<<std::endl;
//MPI_Cart_coords(c_comm, procid, 2, coord);
return;
}
void create_grid(int myrank, int gd,
MPI_Comm* comm_grid, MPI_Comm* comm_row, MPI_Comm* comm_col)
{
int dims[2] = {gd, gd};
int coords[2]; // coords[0] = i, coords[1] = j
int periods[2];
int reorder;
int grid_rank;
int subdivision[2];
periods[0] = 0 ;
periods[1] = 1 ;
reorder = 1 ;
MPI_Cart_create(MPI_COMM_WORLD, 2, dims, periods, reorder, comm_grid);
MPI_Cart_coords(*comm_grid, myrank, 2, coords); //Outputs the i,j coordinates of the process
MPI_Cart_rank(*comm_grid, coords, &grid_rank); //Outputs the rank of the process
subdivision[0] = 1;
subdivision[1] = 0;
MPI_Cart_sub (*comm_grid,subdivision,comm_col); // Communicator between lines
subdivision[0] = 0;
subdivision[1] = 1;
MPI_Cart_sub (*comm_grid,subdivision,comm_row); // Communicator between row
}
/* A two-dimensional torus of 12 processes in a 4x3 grid */
int main(int argc, char *argv[])
{
int rank, size;
MPI_Comm comm;
int dim[2], period[2], reorder;
int coord[2], id;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size != 12)
{
printf("Please run with 12 processes.\n");fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, 1);
}
dim[0]=4; dim[1]=3;
period[0]=0; period[1]=1;
reorder=1;
MPI_Cart_create(MPI_COMM_WORLD, 2, dim, period, reorder, &comm);
if (rank == 5)
{
MPI_Cart_coords(comm, rank, 2, coord);
printf("Rank %d coordinates are %d %d\n", rank, coord[0], coord[1]);fflush(stdout);
}
if(rank==0)
{
coord[0]=3; coord[1]=1;
MPI_Cart_rank(comm, coord, &id);
printf("The processor at position (%d, %d) has rank %d\n", coord[0], coord[1], id);fflush(stdout);
}
MPI_Finalize();
return 0;
}
void ompi_cart_create_f(MPI_Fint *old_comm, MPI_Fint *ndims, MPI_Fint *dims,
ompi_fortran_logical_t *periods, ompi_fortran_logical_t *reorder,
MPI_Fint *comm_cart, MPI_Fint *ierr)
{
MPI_Comm c_comm1, c_comm2;
int size, c_ierr;
OMPI_ARRAY_NAME_DECL(dims);
OMPI_LOGICAL_ARRAY_NAME_DECL(periods);
c_comm1 = MPI_Comm_f2c(*old_comm);
size = OMPI_FINT_2_INT(*ndims);
OMPI_ARRAY_FINT_2_INT(dims, size);
OMPI_ARRAY_LOGICAL_2_INT(periods, size);
c_ierr = MPI_Cart_create(c_comm1, OMPI_FINT_2_INT(*ndims),
OMPI_ARRAY_NAME_CONVERT(dims),
OMPI_LOGICAL_ARRAY_NAME_CONVERT(periods),
OMPI_LOGICAL_2_INT(*reorder),
&c_comm2);
if (NULL != ierr) *ierr = OMPI_INT_2_FINT(c_ierr);
if (MPI_SUCCESS == c_ierr) {
*comm_cart = MPI_Comm_c2f(c_comm2);
}
/*
* Need to convert back into Fortran, to not surprise the user
*/
OMPI_ARRAY_FINT_2_INT_CLEANUP(dims);
OMPI_ARRAY_INT_2_LOGICAL(periods, size);
}
int compute_communicator(int nb_proc_tot, int* nb_proc_row, MPI_Comm* new_comm, int* rank){
if (nb_proc_row == NULL || new_comm == NULL)
return EXIT_FAILURE;
// classical algo to compute quickly integer square root
// this square root will be the amout of process in each dimension of the matrix
register unsigned int op, res, one;
op = (unsigned int) nb_proc_tot;
res = 0;
/* "one" starts at the highest power of four <= than the argument. */
one = 1 << 30; /* second-to-top bit set */
while (one > op) one >>= 2;
while (one != 0) {
if (op >= res + one) {
op -= res + one;
res += one << 1; // <-- faster than 2 * one
}
res >>= 1;
one >>= 2;
}
*nb_proc_row = (int) res;
// creation of the communicator for the grid
const int dims[] = {*nb_proc_row, *nb_proc_row};
const int periods[] = {1, 1};
MPI_Cart_create(MPI_COMM_WORLD, 2, dims, periods, 0, new_comm);
if (*new_comm != MPI_COMM_NULL)
MPI_Comm_rank(*new_comm, rank);
else
return EXIT_FAILURE;
// some process may be unnecessary (if nb_proc_tot isn't a integer power 2)
// so they are stopped
return EXIT_SUCCESS;
}
/*
* Class: mpi_Intracomm
* Method: GetCart
* Signature: ([I[ZZ)J
*/
JNIEXPORT jlong JNICALL Java_mpi_Intracomm_GetCart(JNIEnv *env, jobject jthis,
jintArray dims, jbooleanArray periods,
jboolean reorder)
{
MPI_Comm cart;
int ndims=(*env)->GetArrayLength(env,dims);
jboolean isCopy=JNI_TRUE;
jint *ds; jboolean *ps;
int i;
int *int_re_ds=(int*)calloc((*env)->GetArrayLength(env,periods),
sizeof(int));
ompi_java_clearFreeList(env) ;
ds=(*env)->GetIntArrayElements(env,dims,&isCopy);
ps=(*env)->GetBooleanArrayElements(env,periods,&isCopy);
for(i=0;i<=(*env)->GetArrayLength(env,periods);i++)
if(ps[i]==JNI_TRUE)
int_re_ds[i]=1;
else
int_re_ds[i]=0;
MPI_Cart_create((MPI_Comm)((*env)->GetLongField(env,jthis,ompi_java.CommhandleID)),
ndims, (int*)ds, int_re_ds, reorder, &cart);
(*env)->ReleaseIntArrayElements(env,dims,ds,0);
(*env)->ReleaseBooleanArrayElements(env,periods,ps,0);
free(int_re_ds);
return (jlong)cart;
}
int
main(int argc, char *argv[])
{
int my_rank;
int comm_sz;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &comm_sz);
MPI_Comm grid;
int dim[2] = {4, 3};
int period[2] = {1, 0};
int reorder = 1;
int grid_rank = 0;
int coord[2];
MPI_Cart_create(MPI_COMM_WORLD, 2, dim, period, reorder, &grid);
MPI_Comm_rank(MPI_COMM_WORLD, &grid_rank);
MPI_Cart_coords(grid, grid_rank, 2, coord);
fprintf(stdout, "my grid rank is %02d, my grid coordinate is (%d, %d) -- my global rank is %d of %d; \n",
grid_rank, coord[0], coord[1], my_rank, comm_sz);
MPI_Finalize();
return 0;
}
/*-----------------------------------------------------------*/
int findNeighbours(){
int dims[1];
int periods[1];
int reorder;
/* find a good process distribution */
dims[0] = 0; /* zero so that dims_create tries to rearrange */
MPI_Dims_create(numMPIprocs, 1, dims);
/* set periods equal to TURE for periodic boundary conditions ... */
periods[0] = TRUE;
/* ...and reorder = FALSE */
reorder = FALSE;
/* Create the cartesian topology */
MPI_Cart_create(comm, 1, dims, periods, reorder, &commCart);
/* Find the ranks of the left and right neighbour */
MPI_Cart_shift(commCart, 0, 1, &leftNeighbour, &rightNeighbour);
MPI_Isend(&myMPIRank, 1, MPI_INT, leftNeighbour, TAG, commCart, &requestArray[0]);
MPI_Isend(&myMPIRank, 1, MPI_INT, rightNeighbour, TAG, commCart, &requestArray[1]);
MPI_Irecv(&myGASPIrightNeighbour, 1, MPI_INT, leftNeighbour, TAG, commCart, &requestArray[2]);
MPI_Irecv(&myGASPIleftNeighbour, 1, MPI_INT, rightNeighbour, TAG, commCart, &requestArray[3]);
MPI_Waitall(4, requestArray, statusArray);
return 0;
}
int main(int argc, char *argv[])
{
int errs = 0, err;
int dims[2];
int periods[2];
int size, rank;
MPI_Comm comm;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
dims[0] = size;
dims[1] = size;
periods[0] = 0;
periods[1] = 0;
MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
err = MPI_Cart_create(MPI_COMM_WORLD, 2, dims, periods, 0, &comm);
if (err == MPI_SUCCESS) {
errs++;
printf("Cart_create returned success when dims > size\n");
} else if (comm != MPI_COMM_NULL) {
errs++;
printf("Expected a null comm from cart create\n");
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
void grid_setup(struct grid_info *grid) {
/* obtener datos globales */
MPI_Comm_size(MPI_COMM_WORLD, &(grid->nr_world_processes));
MPI_Comm_rank(MPI_COMM_WORLD, &(grid->my_world_rank));
/* calcular cuantos procesos por lado tendra la grilla */
grid->ppside = intsqrt(grid->nr_world_processes);
/* crear comunicador para topologia de grilla */
int dimensions[2] = {grid->ppside, grid->ppside};
int wrap_around[2] = {TRUE, TRUE};
int reorder = TRUE;
MPI_Cart_create(MPI_COMM_WORLD, 2, dimensions, wrap_around, reorder, &(grid->comm));
MPI_Comm_rank(grid->comm, &(grid->my_rank));
/* obtener coordenadas grillisticas del proceso */
int coordinates[2];
MPI_Cart_coords(grid->comm, grid->my_rank, 2, coordinates);
grid->my_row = coordinates[0];
grid->my_col = coordinates[1];
/* obtener comunicadores para la fila y la columna del proceso */
int free_coords_for_rows[] = {FALSE, TRUE};
int free_coords_for_cols[] = {TRUE, FALSE};
MPI_Cart_sub(grid->comm, free_coords_for_rows, &(grid->row_comm));
MPI_Cart_sub(grid->comm, free_coords_for_cols, &(grid->col_comm));
}
void grid_changed_n_nodes()
{
int per[3] = { 1, 1, 1 };
GRID_TRACE(fprintf(stderr,"%d: grid_changed_n_nodes:\n",this_node));
MPI_Comm_free(&comm_cart);
MPI_Cart_create(MPI_COMM_WORLD, 3, node_grid, per, 0, &comm_cart);
MPI_Comm_rank(comm_cart, &this_node);
MPI_Cart_coords(comm_cart, this_node, 3, node_pos);
calc_node_neighbors(this_node);
#ifdef GRID_DEBUG
fprintf(stderr,"%d: node_pos=(%d,%d,%d)\n",this_node,node_pos[0],node_pos[1],node_pos[2]);
fprintf(stderr,"%d: node_neighbors=(%d,%d,%d,%d,%d,%d)\n",this_node,
node_neighbors[0],node_neighbors[1],node_neighbors[2],
node_neighbors[3],node_neighbors[4],node_neighbors[5]);
fprintf(stderr,"%d: boundary=(%d,%d,%d,%d,%d,%d)\n",this_node,
boundary[0],boundary[1],boundary[2],boundary[3],boundary[4],boundary[5]);
#endif
grid_changed_box_l();
}
static void init_mpi(void)
{
MPI_Comm_size(MPI_COMM_WORLD, &nproc); //プロセス数の取得
int dim = 2; //number of dimension
int procs[2] = {0,0}; //[0]: x方向の分割数, [1]:y方向の分割数 がはいる
int period[2] = {0,0};//境界条件, 0は固定境界
MPI_Comm grid_comm;
int reorder = 1; //re-distribute rank flag
MPI_Dims_create(nproc, dim, procs); //縦横を何分割にするか自動的に計算
MPI_Cart_create(MPI_COMM_WORLD, 2, procs, period, reorder, &grid_comm); //領域を自動分割 => procs, grid_commは変更される
MPI_Cart_shift(grid_comm, 0, 1, <Rank, &rtRank);
MPI_Cart_shift(grid_comm, 1, 1, &bmRank, &tpRank);
//プロセス座標において自分がどの位置に居るのか求める(何行何列に居るか)
int coordinates[2];
MPI_Comm_rank(grid_comm, &rank);
MPI_Cart_coords(grid_comm, rank, 2, coordinates);
SUB_N_X = N_PX / procs[0];
SUB_N_Y = N_PY / procs[1];
SUB_N_PX = SUB_N_X + 2; //のりしろ(となりの領域の値が入る部分)の分2大きい
SUB_N_PY = SUB_N_Y + 2;
SUB_N_CELL = SUB_N_PX*SUB_N_PY;
offsetX = coordinates[0] * SUB_N_X; //ランクのインデックスではなく, セル単位のオフセットなのでSUB_N_Xずれる
offsetY = coordinates[1] * SUB_N_Y;
/*これだと, 1個のデータをSUB_N_PY跳び(次のデータまでSUB_N_PY-1個隙間がある),SUB_N_X行ぶん取ってくる事になる */
MPI_Type_vector(SUB_N_X, 1, SUB_N_PY, MPI_C_DOUBLE_COMPLEX, &X_DIRECTION_DOUBLE_COMPLEX);
MPI_Type_commit(&X_DIRECTION_DOUBLE_COMPLEX);
}
int main(int argc, char *argv[]) {
int SIZE = atoi(argv[1]);
MPI_Status status;
MPI_Comm comm_3d;
int rank, p;
int dims[3], periods[3], coords[3];
dims[0] = dims[1] = dims[2] = periods[0] = periods[1] = periods[2] = 0;
int i;
int *b;
int *my_b = (int *) malloc(SIZE * sizeof(int));
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &p);
// Start the vector that is broadcast.
if (rank == 0){
b = (int *) malloc(SIZE * sizeof(int));
for (i = 0; i < SIZE; i++) my_b[i] = b[i] = i;
}
// Create the mesh.
MPI_Dims_create(p, 3, dims);
MPI_Cart_create(MPI_COMM_WORLD, 3, dims, periods, 0, &comm_3d);
// Load the coordinates.
MPI_Cart_coords(comm_3d, rank, 3, coords);
// The first column will start the broadcast along the rows.
double start = MPI_Wtime();
int dim_0_succ, dim_0_pred, dim_1_succ, dim_1_pred, dim_2_succ, dim_2_pred;
dim_0_succ = dim_0_pred = dim_1_succ = dim_1_pred = dim_2_succ = dim_2_pred = 0;
MPI_Cart_shift(comm_3d, 0, 1, &dim_0_pred, &dim_0_succ);
MPI_Cart_shift(comm_3d, 1, 1, &dim_1_pred, &dim_1_succ);
MPI_Cart_shift(comm_3d, 2, 1, &dim_2_pred, &dim_2_succ);
if (coords[0] == 0 && coords[1] == 0 && coords[2]) {
MPI_Send(b, SIZE, MPI_INT, dim_0_succ, 0, MPI_COMM_WORLD);
MPI_Send(b, SIZE, MPI_INT, dim_1_succ, 0, MPI_COMM_WORLD);
MPI_Send(b, SIZE, MPI_INT, dim_2_succ, 0, MPI_COMM_WORLD);
} else if (coords[1] == 0 && coords[2] == 0){
MPI_Recv(my_b, SIZE, MPI_INT, dim_0_pred, 0, MPI_COMM_WORLD, &status);
MPI_Send(my_b, SIZE, MPI_INT, dim_0_succ, 0, MPI_COMM_WORLD);
MPI_Send(my_b, SIZE, MPI_INT, dim_1_succ, 0, MPI_COMM_WORLD);
MPI_Send(my_b, SIZE, MPI_INT, dim_2_succ, 0, MPI_COMM_WORLD);
} else if (coords[3] == 0){
MPI_Recv(my_b, SIZE, MPI_INT, dim_1_pred, 0, MPI_COMM_WORLD, &status);
MPI_Send(my_b, SIZE, MPI_INT, dim_1_succ, 0, MPI_COMM_WORLD);
MPI_Send(my_b, SIZE, MPI_INT, dim_2_succ, 0, MPI_COMM_WORLD);
} else {
MPI_Recv(my_b, SIZE, MPI_INT, dim_2_pred, 0, MPI_COMM_WORLD, &status);
MPI_Send(my_b, SIZE, MPI_INT, dim_2_succ, 0, MPI_COMM_WORLD);
}
double end = MPI_Wtime();
if (rank == 0) printf("%d %f\n", SIZE, end - start);
MPI_Finalize();
}
void PX(split_cart_procmesh_for_3dto2d_remap_q1)(
const INT *n, MPI_Comm comm_cart_3d,
MPI_Comm *comm_1d
)
{
int p0, p1, q0=0, q1=0;
int ndims, coords_3d[3];
int dim_1d, period_1d, reorder=0;
int color, key;
MPI_Comm comm;
if( !PX(is_cart_procmesh)(comm_cart_3d) )
return;
MPI_Cartdim_get(comm_cart_3d, &ndims);
if(ndims != 3)
return;
PX(get_mpi_cart_coords)(comm_cart_3d, ndims, coords_3d);
PX(get_procmesh_dims_2d)(n, comm_cart_3d, &p0, &p1, &q0, &q1);
/* split into p0*p1*q0 comms of size q1 */
color = coords_3d[0]*p1*q0 + coords_3d[1]*q0 + coords_3d[2]/q1;
key = coords_3d[2]%q1;
// key = coords_3d[2]/q0; /* TODO: delete this line after several tests */
MPI_Comm_split(comm_cart_3d, color, key, &comm);
dim_1d = q1; period_1d = 1;
MPI_Cart_create(comm, ndims=1, &dim_1d, &period_1d, reorder,
comm_1d);
MPI_Comm_free(&comm);
}
static MPI_Comm cart_comm_1d(MPI_Comm communicator) {
/* test whether the communicator is cartesian and correct dimensionality */
fcs_int status;
MPI_Topo_test(communicator, &status);
if (status == MPI_CART) {
/* Communicator is cartesian, so test dimensionality */
fcs_int ndims;
MPI_Cartdim_get(communicator, &ndims);
if (ndims == 3) {
/* Correct dimensionality, so get grid and test periodicity */
fcs_int node_grid[3], periodicity[3], node_pos[3];
MPI_Cart_get(communicator, 3, node_grid, periodicity, node_pos);
if (!periodicity[0] && !periodicity[1] && periodicity[2]) {
return communicator;
}
}
}
/* Otherwise, we have to set up the cartesian communicator */
fcs_int comm_size;
MPI_Comm_size(communicator, &comm_size);
fcs_int node_grid[3] = {0, 0, 0};
MPI_Dims_create(comm_size, 3, node_grid);
fcs_int periodicity[3] = {1, 1, 0};
MPI_Comm new_communicator;
MPI_Cart_create(communicator, 3, node_grid, periodicity, 1, &new_communicator);
return new_communicator;
}
int PX(create_procmesh)(
int rnk, MPI_Comm comm, const int *np,
MPI_Comm *comm_cart
)
{
int *periods, reorder=1, num_procs=1, ret = 0, size;
int *dims;
dims = (int*) malloc(sizeof(int) * (size_t) rnk);
for(int t=0; t<rnk; t++)
dims[t] = np[t];
MPI_Comm_size(comm, &size);
for(int t=0; t<rnk; t++)
num_procs *= np[t];
if(num_procs != size)
return 1;
periods = (int *) malloc(sizeof(int) * (size_t) rnk);
*comm_cart = MPI_COMM_NULL;
for(int t=0; t<rnk; t++)
periods[t] = 1;
ret = MPI_Cart_create(comm, rnk, dims, periods, reorder, comm_cart);
free(periods); free(dims);
return ret;
}
int main( int argc, char *argv[] )
{
int errs = 0;
int topo_type, size, dims[1], periods[1];
MPI_Comm comm;
MTest_Init( &argc, &argv );
/* Check that topo test returns the correct type, including
MPI_UNDEFINED */
MPI_Topo_test( MPI_COMM_WORLD, &topo_type );
if (topo_type != MPI_UNDEFINED) {
errs++;
printf( "Topo type of comm world is not UNDEFINED\n" );
}
MPI_Comm_size( MPI_COMM_WORLD, &size );
dims[0] = size;
periods[0] = 0;
MPI_Cart_create( MPI_COMM_WORLD, 1, dims, periods, 0, &comm );
MPI_Topo_test( comm, &topo_type );
if (topo_type != MPI_CART) {
errs++;
printf( "Topo type of cart comm is not CART\n" );
}
MPI_Comm_free( &comm );
/* FIXME: still need graph example */
MTest_Finalize( errs );
MPI_Finalize();
return 0;
}
void topo_cartesian(int rank, int *dims, int *coords, int *neigh)
{
int periods[3];
MPI_Comm commcart;
periods[0]=1;
periods[1]=1;
periods[2]=1;
// creation of cartesian communicator
MPI_Cart_create(MPI_COMM_WORLD,3,dims,periods,0,&commcart);
// getting the cartesian position
MPI_Cart_coords(commcart,rank,3,coords);
// getting the neighbors
MPI_Cart_shift(commcart,0,1,neigh+0,neigh+1); //X
MPI_Cart_shift(commcart,1,1,neigh+2,neigh+3); //Y
MPI_Cart_shift(commcart,2,1,neigh+4,neigh+5); //Z
printf(" proc #%d has coordinates %d %d %d and neighbors Xm=%d Xp=%d Ym=%d Yp=%d Zm=%d Zp=%d \n",rank,coords[0],coords[1],coords[2],neigh[0],neigh[1],neigh[2],neigh[3],neigh[4],neigh[5]);
// printf(" dims = %d %d %d\n",dims[0],dims[1],dims[2]);
}
void mpla_init_instance_block_rows(struct mpla_instance* instance, MPI_Comm comm)
{
instance->comm = comm;
// get number of process
MPI_Comm_size(comm, &(instance->proc_count));
// find number of current process
MPI_Comm_rank(comm, &(instance->cur_proc_rank));
if (instance->cur_proc_rank==0)
instance->is_parent = true;
else
instance->is_parent = false;
// compute the process grid, enforcing only a parallelization over rows
int dims[2];
dims[0]=instance->proc_count;
dims[1]=1;
MPI_Dims_create(instance->proc_count, 2, dims);
instance->proc_rows = dims[0];
instance->proc_cols = dims[1];
// create cartesian communicator and retrieve cartesian coordinates
int periods[2];
periods[0]=periods[1]=0;
MPI_Cart_create(comm, 2, dims, periods, 0, &(instance->comm));
int cur_proc_coord[2];
MPI_Cart_get(instance->comm, 2, dims, periods, cur_proc_coord);
instance->cur_proc_row = cur_proc_coord[0];
instance->cur_proc_col = cur_proc_coord[1];;
cublasCreate(&(instance->cublas_handle));
}
FC_FUNC( mpi_cart_create , MPI_CART_CREATE )
( int *comm_old, int *ndims, int *dims, int *periods,
int *reorder, int *comm_cart, int *ierr)
{
*ierr = MPI_Cart_create( *comm_old, *ndims, dims, periods, *reorder,
comm_cart);
}
void PX(split_cart_procmesh_3dto2d_p1q1)(
const INT *n, MPI_Comm comm_cart_3d,
MPI_Comm *comm_1d
)
{
int p0, p1, q0=0, q1=0;
int ndims, coords_3d[3];
int dim_1d, period_1d, reorder=0;
int color, key;
MPI_Comm comm;
if( !PX(is_cart_procmesh)(comm_cart_3d) )
return;
MPI_Cartdim_get(comm_cart_3d, &ndims);
if(ndims != 3)
return;
PX(get_mpi_cart_coords)(comm_cart_3d, ndims, coords_3d);
PX(get_procmesh_dims_2d)(n, comm_cart_3d, &p0, &p1, &q0, &q1);
/* split into p0*q0 comms of size p1*q1 */
color = coords_3d[0]*q0 + coords_3d[2]/q1;
key = coords_3d[1]*q1 + coords_3d[2]%q1;
MPI_Comm_split(comm_cart_3d, color, key, &comm);
dim_1d = p1*q1; period_1d = 1;
MPI_Cart_create(comm, ndims=1, &dim_1d, &period_1d, reorder,
comm_1d);
MPI_Comm_free(&comm);
}
void initialiseMonde(int argc, char** argv)
{
int remain[2], periods[2], reorder, i, nb_thread;
MPI_Init (&argc, &argv); /* starts MPI */
MPI_Comm_rank (MPI_COMM_WORLD, &rank); /* get current process id */
MPI_Comm_size (MPI_COMM_WORLD, &size); /* get number of processes */
// On vérifie qu'il existe au moins un deuxieme argument
if(argc < 3)
{
MPI_Finalize();
if(rank == 0)
printf("Le nombre d'arguments n'est pas suffisant\nAssurez vous de préciser en premier argument le nombre de thread puis la taille de matrice");
exit(1);
}
nb_thread = atoi(argv[1]);
omp_set_num_threads(nb_thread);
taille_matrice = atoi(argv[2]);
racine = sqrt(size);
if (racine * racine != size || taille_matrice % racine != 0)
{
MPI_Finalize();
if(rank == 0)
printf("Le nombre de processus MPI n'est pas cohérent avec la taille de la matrice\n");
exit(1);
}
taille_block = taille_matrice / racine;
tab_dim[LIGNE] = racine;
tab_dim[COLONNE] = racine;
periods[LIGNE] = 0;
periods[COLONNE] = 0;
reorder = 0;
MPI_Cart_create(MPI_COMM_WORLD, 2, tab_dim, periods, reorder, &COMM_CART);
// Récupération du rang dans le communicateur cartésien
MPI_Comm_rank(COMM_CART, &rankCart);
// Récupération des coordonnées dans le communicateur cartésien
MPI_Cart_coords(COMM_CART, rankCart, 2, coords);
// Création du communicateur en ligne
remain[LIGNE] = 1;
remain[COLONNE] = 0;
MPI_Cart_sub(COMM_CART, remain, &COMM_ROWS);
// Récupération du rang dans le communicateur en ligne
MPI_Comm_rank(COMM_ROWS, &rankRow);
// Création du communicateur en colonne
remain[LIGNE] = 0;
remain[COLONNE] = 1;
MPI_Cart_sub(COMM_CART, remain, &COMM_COLS);
// Récupération du rang dans le communicateur en colonne
MPI_Comm_rank(COMM_COLS, &rankCol);
}
void create_grid(GRID_INFO * grid){
int old_rank;
int size;
MPI_Comm_rank(MPI_COMM_WORLD,&old_rank);
#ifdef DEBUG_MODE
if(old_rank == 0) { DEBUG("Creating grid ...") }
#endif
/* Setting up order of grid */
MPI_Comm_size(MPI_COMM_WORLD,&size);
grid->processes = size;
grid->grid_order = sqrt(size);
#ifdef DEBUG_MODE
if(old_rank == 0){ DEBUGA(" Order %d",grid->grid_order)};
#endif
int dimensions[2] = {grid->grid_order,grid->grid_order};
int periods[2] = {1,1};
/* Creating the grid */
MPI_Cart_create(MPI_COMM_WORLD,2,dimensions,periods,1, &(grid->grid_comm));
/* Get rank in the grid */
MPI_Comm_rank(grid->grid_comm,&(grid->rank));
/* Get coordinates in the grid */
int coord[2];
MPI_Cart_coords(grid->grid_comm,grid->rank, 2, coord);
grid->row = coord[0];
grid->col = coord[1];
#ifdef DEBUG_MODE
if(old_rank == 0) { DEBUG(" Creating row communicator") }
#endif
/* Creating row communicator */
int variable_coord[2] = {0,1};
MPI_Cart_sub(grid->grid_comm,variable_coord,&(grid->row_comm));
#ifdef DEBUG_MODE
if(old_rank == 0) { DEBUG(" Creating col communicator") }
#endif
/* Creating column communicator */
variable_coord[0] = 1;
variable_coord[1] = 0;
MPI_Cart_sub(grid->grid_comm,variable_coord,&(grid->col_comm));
#ifdef DEBUG_MODE
if(old_rank == 0) { DEBUG("Grid created.") }
#endif
}
void MatrixMatrixMultiply(double ***a, double ***b, double ***c, int mra, int
mca, int mrb, int mcb, int *ra, int *ca, int *rb, int *cb, MPI_Comm
comm)
{
/*from the teaching book */
int i, j;
int num_procs, dims[2], periods[2];
int myrank, my2drank, mycoords[2];
int uprank, downrank, leftrank, rightrank, coords[2];
int shiftsource, shiftdest;
MPI_Status status;
MPI_Comm comm_2d;
MPI_Comm_size(comm, &num_procs);
MPI_Comm_rank(comm_2d, &my2drank);
dims[0] = dims[1] = 0;
MPI_Dims_create(num_procs, 2, dims);
periods[0]= periods[1] = 1;
MPI_Cart_create(comm, 2, dims, periods, 1, &comm_2d);
MPI_Comm_rank(comm_2d, &my2drank);
MPI_Cart_coords(comm_2d, my2drank, 2, mycoords);
MPI_Cart_shift(comm_2d, 1, -1, &rightrank, &leftrank);
MPI_Cart_shift(comm_2d, 0, -1, &downrank, &uprank);
int ia = my2drank;
int ib = my2drank;
MPI_Cart_shift(comm_2d, 1, -mycoords[0], &shiftsource, &shiftdest);
MPI_Sendrecv_replace((*a)[0], mra*mca, MPI_DOUBLE, shiftdest, 1,
shiftsource, 1, comm_2d, &status);
MPI_Sendrecv_replace(&ia, 1, MPI_INT, shiftdest, 1, shiftsource, 1,
comm_2d, &status);
MPI_Cart_shift(comm_2d, 0, -mycoords[1], &shiftsource, &shiftdest);
MPI_Sendrecv_replace((*b)[0], mrb*mcb, MPI_DOUBLE, shiftdest, 1,
shiftsource, 1, comm_2d, &status);
MPI_Sendrecv_replace(&ib, 1, MPI_INT, shiftdest, 1, shiftsource, 1,
comm_2d, &status);
for (i=0; i<dims[0]; i++){
MatrixMultiply(ra[ia], ca[ia], rb[ib], cb[ib], *a, *b, c); /* c=c + a*b */
MPI_Sendrecv_replace((*a)[0], mra*mca, MPI_DOUBLE, leftrank, 1,
rightrank, 1, comm_2d, &status);
MPI_Sendrecv_replace((*b)[0], mrb*mcb, MPI_DOUBLE, uprank, 1, downrank,
1, comm_2d, &status);
MPI_Sendrecv_replace(&ia, 1, MPI_INT, leftrank, 1, rightrank, 1,
comm_2d, &status);
MPI_Sendrecv_replace(&ib, 1, MPI_INT, uprank, 1, downrank, 1,
comm_2d, &status);
}
MPI_Comm_free(&comm_2d);
}
int main (int argc, char** argv)
{
int num_tasks;
char hostname[80];
int dims[DIM];
dims[0] = DIM_0;
dims[1] = DIM_1;
dims[2] = DIM_2;
int periods[DIM] = {false, false, false};
int reorder = true;
int my_rank;
int coords[DIM];
MPI_Comm cartcomm, y_comm;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
MPI_Comm_size(MPI_COMM_WORLD, &num_tasks);
if (num_tasks != SIZE) {
if (my_rank == 0) {
printf("We need %d proccesses, %d given. Exiting.\n", SIZE, num_tasks);
}
MPI_Finalize();
return 0;
}
gethostname(hostname, 79);
MPI_Cart_create(MPI_COMM_WORLD, DIM, dims, periods, reorder, &cartcomm);
MPI_Cart_coords(cartcomm, my_rank, DIM, coords);
printf("%-15.12s: MPI_COMM_WORLD rank %2d: (%d, %d, %d)\n", hostname, my_rank, coords[0], coords[1], coords[2]);
//neighbors
int src, dest;
for (int i = 0; i < 3; i++) {
MPI_Cart_shift(cartcomm, i, +1, src, dest);
printf("i am %d and my right neighbor in %d is %d", dest, i, src);
MPI_Cart_shift(cartcomm, i, -1, src, dest);
printf("i am %d and my left neighbor in %d is %d", dest, i, src);
}
int keep_dims[1];
keep_dims[0] = 1;
MPI_Cart_sub(cartcomm, keep_dims, &y_comm);
printf("%d: my y rank is %d", my_rank, coords[1]);
MPI_Finalize();
return 0;
}
void mpif_cart_create_(MPI_Fint *comm_old, int *ndims, int *dims, int *periods, int *reorder, MPI_Fint *comm_cart, int *error)
{
MPI_Comm comm_old_c = MPI_Comm_f2c(*comm_old);
MPI_Comm comm_cart_c;
*error = MPI_Cart_create(comm_old_c, *ndims, dims, periods, *reorder, &comm_cart_c);
*comm_cart = MPI_Comm_c2f(comm_cart_c);
}
void Lattice2D::init(int _dim_x, double _length_x, int _dim_y, double _length_y,
bool periodic_x_axis, bool periodic_y_axis,
double angular_velocity, string _coordinate_system) {
if (_coordinate_system != "cartesian" &&
_coordinate_system != "cylindrical") {
my_abort("The coordinate system you have chosen is not implemented.");
}
if (_coordinate_system == "cylindrical" &&
periodic_x_axis == true) {
my_abort("You cannot choose periodic boundary on the radial axis.");
}
length_x = _length_x;
length_y = _length_y;
if (_coordinate_system == "cylindrical") {
_dim_x += 1;
delta_x = length_x / (double(_dim_x) - 0.5);
}
else {
delta_x = length_x / double(_dim_x);
}
delta_y = length_y / double(_dim_y);
coordinate_system = _coordinate_system;
periods[0] = (int) periodic_y_axis;
periods[1] = (int) periodic_x_axis;
mpi_dims[0] = mpi_dims[1] = 0;
#ifdef HAVE_MPI
MPI_Comm_size(MPI_COMM_WORLD, &mpi_procs);
MPI_Dims_create(mpi_procs, 2, mpi_dims); //partition all the processes (the size of MPI_COMM_WORLD's group) into an 2-dimensional topology
MPI_Cart_create(MPI_COMM_WORLD, 2, mpi_dims, periods, 0, &cartcomm);
MPI_Comm_rank(cartcomm, &mpi_rank);
MPI_Cart_coords(cartcomm, mpi_rank, 2, mpi_coords);
#else
mpi_procs = 1;
mpi_rank = 0;
mpi_dims[0] = mpi_dims[1] = 1;
mpi_coords[0] = mpi_coords[1] = 0;
#endif
halo_x = (angular_velocity == 0. ? 4 : 8);
halo_y = (angular_velocity == 0. ? 4 : 8);
global_dim_x = _dim_x + periods[1] * 2 * halo_x;
global_dim_y = _dim_y + periods[0] * 2 * halo_y;
global_no_halo_dim_x = _dim_x;
global_no_halo_dim_y = _dim_y;
//set dimension of tiles and offsets
calculate_borders(mpi_coords[1], mpi_dims[1], &start_x, &end_x,
&inner_start_x, &inner_end_x,
_dim_x, halo_x, periods[1]);
if (coordinate_system == "cylindrical" && mpi_coords[1] == 0) {
inner_start_x += 1;
}
calculate_borders(mpi_coords[0], mpi_dims[0], &start_y, &end_y,
&inner_start_y, &inner_end_y,
_dim_y, halo_y, periods[0]);
dim_x = end_x - start_x;
dim_y = end_y - start_y;
}
Lattice1D::Lattice1D(int dim, double length, bool periodic_x_axis, string _coordinate_system) {
if (_coordinate_system != "cartesian" &&
_coordinate_system != "cylindrical") {
my_abort("The coordinate system you have chosen is not implemented.");
}
if (_coordinate_system == "cylindrical" &&
periodic_x_axis == true) {
my_abort("You cannot choose periodic boundary on the radial axis.");
}
coordinate_system = _coordinate_system;
length_x = length;
length_y = 0;
if (_coordinate_system == "cylindrical") {
dim += 1;
delta_x = length_x / (double(dim) - 0.5);
}
else {
delta_x = length_x / double(dim);
}
delta_y = 1.0;
periods[0] = 0;
periods[1] = (int) periodic_x_axis;
#ifdef HAVE_MPI
MPI_Comm_size(MPI_COMM_WORLD, &mpi_procs);
mpi_dims[0] = mpi_procs;
mpi_dims[1] = 1;
MPI_Dims_create(mpi_procs, 2, mpi_dims); //partition all the processes (the size of MPI_COMM_WORLD's group) into an 2-dimensional topology
MPI_Cart_create(MPI_COMM_WORLD, 2, mpi_dims, periods, 0, &cartcomm);
MPI_Comm_rank(cartcomm, &mpi_rank);
MPI_Cart_coords(cartcomm, mpi_rank, 2, mpi_coords);
#else
mpi_procs = 1;
mpi_rank = 0;
mpi_dims[0] = mpi_dims[1] = 1;
mpi_coords[0] = mpi_coords[1] = 0;
#endif
halo_x = 4;
halo_y = 0;
global_dim_x = dim + periods[1] * 2 * halo_x;
global_dim_y = 1;
global_no_halo_dim_x = dim;
global_no_halo_dim_y = 1;
//set dimension of tiles and offsets
calculate_borders(mpi_coords[0], mpi_dims[0], &start_x, &end_x,
&inner_start_x, &inner_end_x,
dim, halo_x, periods[1]);
if (coordinate_system == "cylindrical" && mpi_coords[1] == 0) {
inner_start_x += 1;
}
dim_x = end_x - start_x;
start_y = 0;
end_y = 1;
inner_start_y = 0;
inner_end_y = 1;
dim_y = 1;
}
void split_communicator(MPI_Comm comm, MPI_Comm cart[], int P[]) {
int wrap[]= {0,0};
int coor[2];
MPI_Comm gcart;
MPI_Cart_create(comm,2,P,wrap,1,&gcart); //parameter 4: value 1: reorder
MPI_Cart_get(gcart,2,P,wrap,coor);
int rdim1[] = {0,1}, rdim2[] = {1,0};
MPI_Cart_sub(gcart, rdim1 , &cart[0]);
MPI_Cart_sub(gcart, rdim2 , &cart[1]);
}