void bail_out (int error) {
long *global_error;
long *local_error;
long *pWrk;
long *pSync_local;
int i;
global_error = prk_shmem_malloc(sizeof(long));
local_error = prk_shmem_malloc(sizeof(long));
pWrk = prk_shmem_malloc(sizeof(long)*PRK_SHMEM_BCAST_SYNC_SIZE);
pSync_local = prk_shmem_malloc(sizeof(long)*PRK_SHMEM_BCAST_SYNC_SIZE);
for (i = 0; i < PRK_SHMEM_BCAST_SYNC_SIZE; i += 1) {
pSync_local[i] = PRK_SHMEM_SYNC_VALUE;
}
local_error [0] = error;
shmem_barrier_all ();
shmem_long_max_to_all (global_error, local_error, 1, 0, 0, prk_shmem_n_pes(), pWrk, pSync_local);
if (global_error [0] > 0) {
prk_shmem_finalize ();
exit (1);
}
return;
}
int main(int argc, char ** argv) {
int Num_procs; /* number of ranks */
int Num_procsx, Num_procsy; /* number of ranks in each coord direction */
int my_ID; /* SHMEM rank */
int my_IDx, my_IDy; /* coordinates of rank in rank grid */
int right_nbr; /* global rank of right neighboring tile */
int left_nbr; /* global rank of left neighboring tile */
int top_nbr; /* global rank of top neighboring tile */
int bottom_nbr; /* global rank of bottom neighboring tile */
DTYPE *top_buf_out; /* communication buffer */
DTYPE *top_buf_in[2]; /* " " */
DTYPE *bottom_buf_out; /* " " */
DTYPE *bottom_buf_in[2];/* " " */
DTYPE *right_buf_out; /* " " */
DTYPE *right_buf_in[2]; /* " " */
DTYPE *left_buf_out; /* " " */
DTYPE *left_buf_in[2]; /* " " */
int root = 0;
int n, width, height;/* linear global and local grid dimension */
int i, j, ii, jj, kk, it, jt, iter, leftover; /* dummies */
int istart, iend; /* bounds of grid tile assigned to calling rank */
int jstart, jend; /* bounds of grid tile assigned to calling rank */
DTYPE reference_norm;
DTYPE f_active_points; /* interior of grid with respect to stencil */
int stencil_size; /* number of points in the stencil */
DTYPE flops; /* floating point ops per iteration */
int iterations; /* number of times to run the algorithm */
double avgtime, /* timing parameters */
*local_stencil_time, *stencil_time;
DTYPE * RESTRICT in; /* input grid values */
DTYPE * RESTRICT out; /* output grid values */
long total_length_in; /* total required length to store input array */
long total_length_out;/* total required length to store output array */
int error=0; /* error flag */
DTYPE weight[2*RADIUS+1][2*RADIUS+1]; /* weights of points in the stencil */
int *arguments; /* command line parameters */
int count_case=4; /* number of neighbors of a rank */
long *pSync_bcast; /* work space for collectives */
long *pSync_reduce; /* work space for collectives */
double *pWrk_time; /* work space for collectives */
DTYPE *pWrk_norm; /* work space for collectives */
int *iterflag; /* synchronization flags */
int sw; /* double buffering switch */
DTYPE *local_norm, *norm; /* local and global error norms */
/*******************************************************************************
** Initialize the SHMEM environment
********************************************************************************/
prk_shmem_init();
my_ID=prk_shmem_my_pe();
Num_procs=prk_shmem_n_pes();
pSync_bcast = (long *) prk_shmem_malloc(PRK_SHMEM_BCAST_SYNC_SIZE*sizeof(long));
pSync_reduce = (long *) prk_shmem_malloc(PRK_SHMEM_REDUCE_SYNC_SIZE*sizeof(long));
pWrk_time = (double *) prk_shmem_malloc(PRK_SHMEM_REDUCE_MIN_WRKDATA_SIZE*sizeof(double));
pWrk_norm = (DTYPE *) prk_shmem_malloc(PRK_SHMEM_REDUCE_MIN_WRKDATA_SIZE*sizeof(DTYPE));
local_stencil_time = (double *) prk_shmem_malloc(sizeof(double));
stencil_time = (double *) prk_shmem_malloc(sizeof(double));
local_norm = (DTYPE *) prk_shmem_malloc(sizeof(DTYPE));
norm = (DTYPE *) prk_shmem_malloc(sizeof(DTYPE));
iterflag = (int *) prk_shmem_malloc(2*sizeof(int));
if (!(pSync_bcast && pSync_reduce && pWrk_time && pWrk_norm && iterflag &&
local_stencil_time && stencil_time && local_norm && norm))
{
printf("Could not allocate scalar variables on rank %d\n", my_ID);
error = 1;
}
bail_out(error);
for(i=0;i<PRK_SHMEM_BCAST_SYNC_SIZE;i++)
pSync_bcast[i]=PRK_SHMEM_SYNC_VALUE;
for(i=0;i<PRK_SHMEM_REDUCE_SYNC_SIZE;i++)
pSync_reduce[i]=PRK_SHMEM_SYNC_VALUE;
arguments=(int*)prk_shmem_malloc(2*sizeof(int));
/*******************************************************************************
** process, test, and broadcast input parameters
********************************************************************************/
if (my_ID == root) {
#ifndef STAR
printf("ERROR: Compact stencil not supported\n");
error = 1;
goto ENDOFTESTS;
#endif
if (argc != 3){
printf("Usage: %s <# iterations> <array dimension> \n",
*argv);
error = 1;
goto ENDOFTESTS;
}
iterations = atoi(*++argv);
arguments[0]=iterations;
if (iterations < 1){
printf("ERROR: iterations must be >= 1 : %d \n",iterations);
error = 1;
goto ENDOFTESTS;
}
n = atoi(*++argv);
arguments[1]=n;
long nsquare = (long)n * (long)n;
if (nsquare < Num_procs){
printf("ERROR: grid size must be at least # ranks: %ld\n", nsquare);
error = 1;
goto ENDOFTESTS;
}
if (RADIUS < 0) {
printf("ERROR: Stencil radius %d should be non-negative\n", RADIUS);
error = 1;
goto ENDOFTESTS;
}
if (2*RADIUS +1 > n) {
printf("ERROR: Stencil radius %d exceeds grid size %d\n", RADIUS, n);
error = 1;
goto ENDOFTESTS;
}
ENDOFTESTS:;
}
bail_out(error);
/* determine best way to create a 2D grid of ranks (closest to square, for
best surface/volume ratio); we do this brute force for now
*/
for (Num_procsx=(int) (sqrt(Num_procs+1)); Num_procsx>0; Num_procsx--) {
if (!(Num_procs%Num_procsx)) {
Num_procsy = Num_procs/Num_procsx;
break;
}
}
my_IDx = my_ID%Num_procsx;
my_IDy = my_ID/Num_procsx;
/* compute neighbors; don't worry about dropping off the edges of the grid */
right_nbr = my_ID+1;
left_nbr = my_ID-1;
top_nbr = my_ID+Num_procsx;
bottom_nbr = my_ID-Num_procsx;
iterflag[0] = iterflag[1] = 0;
if(my_IDx==0) count_case--;
if(my_IDx==Num_procsx-1) count_case--;
if(my_IDy==0) count_case--;
if(my_IDy==Num_procsy-1) count_case--;
if (my_ID == root) {
printf("Parallel Research Kernels version %s\n", PRKVERSION);
printf("SHMEM stencil execution on 2D grid\n");
printf("Number of ranks = %d\n", Num_procs);
printf("Grid size = %d\n", n);
printf("Radius of stencil = %d\n", RADIUS);
printf("Tiles in x/y-direction = %d/%d\n", Num_procsx, Num_procsy);
printf("Type of stencil = star\n");
#ifdef DOUBLE
printf("Data type = double precision\n");
#else
printf("Data type = single precision\n");
#endif
#if LOOPGEN
printf("Script used to expand stencil loop body\n");
#else
printf("Compact representation of stencil loop body\n");
#endif
#if SPLITFENCE
printf("Split fence = ON\n");
#else
printf("Split fence = OFF\n");
#endif
printf("Number of iterations = %d\n", iterations);
}
shmem_barrier_all();
shmem_broadcast32(&arguments[0], &arguments[0], 2, root, 0, 0, Num_procs, pSync_bcast);
iterations=arguments[0];
n=arguments[1];
shmem_barrier_all();
prk_shmem_free(arguments);
/* compute amount of space required for input and solution arrays */
width = n/Num_procsx;
leftover = n%Num_procsx;
if (my_IDx<leftover) {
istart = (width+1) * my_IDx;
iend = istart + width + 1;
}
else {
istart = (width+1) * leftover + width * (my_IDx-leftover);
iend = istart + width;
}
width = iend - istart + 1;
if (width == 0) {
printf("ERROR: rank %d has no work to do\n", my_ID);
error = 1;
}
bail_out(error);
height = n/Num_procsy;
leftover = n%Num_procsy;
if (my_IDy<leftover) {
jstart = (height+1) * my_IDy;
jend = jstart + height + 1;
}
else {
jstart = (height+1) * leftover + height * (my_IDy-leftover);
jend = jstart + height;
}
height = jend - jstart + 1;
if (height == 0) {
printf("ERROR: rank %d has no work to do\n", my_ID);
error = 1;
}
bail_out(error);
if (width < RADIUS || height < RADIUS) {
printf("ERROR: rank %d has work tile smaller then stencil radius\n",
my_ID);
error = 1;
}
bail_out(error);
total_length_in = (width+2*RADIUS);
total_length_in *= (height+2*RADIUS);
total_length_in *= sizeof(DTYPE);
total_length_out = width;
total_length_out *= height;
total_length_out *= sizeof(DTYPE);
in = (DTYPE *) malloc(total_length_in);
out = (DTYPE *) malloc(total_length_out);
if (!in || !out) {
printf("ERROR: rank %d could not allocate space for input/output array\n",
my_ID);
error = 1;
}
bail_out(error);
/* fill the stencil weights to reflect a discrete divergence operator */
for (jj=-RADIUS; jj<=RADIUS; jj++) for (ii=-RADIUS; ii<=RADIUS; ii++)
WEIGHT(ii,jj) = (DTYPE) 0.0;
stencil_size = 4*RADIUS+1;
for (ii=1; ii<=RADIUS; ii++) {
WEIGHT(0, ii) = WEIGHT( ii,0) = (DTYPE) (1.0/(2.0*ii*RADIUS));
WEIGHT(0,-ii) = WEIGHT(-ii,0) = -(DTYPE) (1.0/(2.0*ii*RADIUS));
}
norm[0] = (DTYPE) 0.0;
f_active_points = (DTYPE) (n-2*RADIUS)*(DTYPE) (n-2*RADIUS);
/* intialize the input and output arrays */
for (j=jstart; j<jend; j++) for (i=istart; i<iend; i++) {
IN(i,j) = COEFX*i+COEFY*j;
OUT(i,j) = (DTYPE)0.0;
}
/* allocate communication buffers for halo values */
top_buf_out=(DTYPE*)malloc(2*sizeof(DTYPE)*RADIUS*width);
if (!top_buf_out) {
printf("ERROR: Rank %d could not allocate output comm buffers for y-direction\n", my_ID);
error = 1;
}
bail_out(error);
bottom_buf_out = top_buf_out+RADIUS*width;
top_buf_in[0]=(DTYPE*)prk_shmem_malloc(4*sizeof(DTYPE)*RADIUS*width);
if(!top_buf_in)
{
printf("ERROR: Rank %d could not allocate input comm buffers for y-direction\n", my_ID);
error=1;
}
bail_out(error);
top_buf_in[1] = top_buf_in[0] + RADIUS*width;
bottom_buf_in[0] = top_buf_in[1] + RADIUS*width;
bottom_buf_in[1] = bottom_buf_in[0] + RADIUS*width;
right_buf_out=(DTYPE*)malloc(2*sizeof(DTYPE)*RADIUS*height);
if (!right_buf_out) {
printf("ERROR: Rank %d could not allocate output comm buffers for x-direction\n", my_ID);
error = 1;
}
bail_out(error);
left_buf_out=right_buf_out+RADIUS*height;
right_buf_in[0]=(DTYPE*)prk_shmem_malloc(4*sizeof(DTYPE)*RADIUS*height);
if(!right_buf_in)
{
printf("ERROR: Rank %d could not allocate input comm buffers for x-dimension\n", my_ID);
error=1;
}
bail_out(error);
right_buf_in[1] = right_buf_in[0] + RADIUS*height;
left_buf_in[0] = right_buf_in[1] + RADIUS*height;
left_buf_in[1] = left_buf_in[0] + RADIUS*height;
/* make sure all symmetric heaps are allocated before being used */
shmem_barrier_all();
for (iter = 0; iter<=iterations; iter++){
/* start timer after a warmup iteration */
if (iter == 1) {
shmem_barrier_all();
local_stencil_time[0] = wtime();
}
/* sw determines which incoming buffer to select */
sw = iter%2;
/* need to fetch ghost point data from neighbors */
if (my_IDy < Num_procsy-1) {
for (kk=0,j=jend-RADIUS; j<=jend-1; j++) for (i=istart; i<=iend; i++) {
top_buf_out[kk++]= IN(i,j);
}
shmem_putmem(bottom_buf_in[sw], top_buf_out, RADIUS*width*sizeof(DTYPE), top_nbr);
#if SPLITFENCE
shmem_fence();
shmem_int_inc(&iterflag[sw], top_nbr);
#endif
}
if (my_IDy > 0) {
for (kk=0,j=jstart; j<=jstart+RADIUS-1; j++) for (i=istart; i<=iend; i++) {
bottom_buf_out[kk++]= IN(i,j);
}
shmem_putmem(top_buf_in[sw], bottom_buf_out, RADIUS*width*sizeof(DTYPE), bottom_nbr);
#if SPLITFENCE
shmem_fence();
shmem_int_inc(&iterflag[sw], bottom_nbr);
#endif
}
if(my_IDx < Num_procsx-1) {
for(kk=0,j=jstart;j<=jend;j++) for(i=iend-RADIUS;i<=iend-1;i++) {
right_buf_out[kk++]=IN(i,j);
}
shmem_putmem(left_buf_in[sw], right_buf_out, RADIUS*height*sizeof(DTYPE), right_nbr);
#if SPLITFENCE
shmem_fence();
shmem_int_inc(&iterflag[sw], right_nbr);
#endif
}
if(my_IDx>0) {
for(kk=0,j=jstart;j<=jend;j++) for(i=istart;i<=istart+RADIUS-1;i++) {
left_buf_out[kk++]=IN(i,j);
}
shmem_putmem(right_buf_in[sw], left_buf_out, RADIUS*height*sizeof(DTYPE), left_nbr);
#if SPLITFENCE
shmem_fence();
shmem_int_inc(&iterflag[sw], left_nbr);
#endif
}
#if SPLITFENCE == 0
shmem_fence();
if(my_IDy<Num_procsy-1) shmem_int_inc(&iterflag[sw], top_nbr);
if(my_IDy>0) shmem_int_inc(&iterflag[sw], bottom_nbr);
if(my_IDx<Num_procsx-1) shmem_int_inc(&iterflag[sw], right_nbr);
if(my_IDx>0) shmem_int_inc(&iterflag[sw], left_nbr);
#endif
shmem_int_wait_until(&iterflag[sw], SHMEM_CMP_EQ, count_case*(iter/2+1));
if (my_IDy < Num_procsy-1) {
for (kk=0,j=jend; j<=jend+RADIUS-1; j++) for (i=istart; i<=iend; i++) {
IN(i,j) = top_buf_in[sw][kk++];
}
}
if (my_IDy > 0) {
for (kk=0,j=jstart-RADIUS; j<=jstart-1; j++) for (i=istart; i<=iend; i++) {
IN(i,j) = bottom_buf_in[sw][kk++];
}
}
if (my_IDx < Num_procsx-1) {
for (kk=0,j=jstart; j<=jend; j++) for (i=iend; i<=iend+RADIUS-1; i++) {
IN(i,j) = right_buf_in[sw][kk++];
}
}
if (my_IDx > 0) {
for (kk=0,j=jstart; j<=jend; j++) for (i=istart-RADIUS; i<=istart-1; i++) {
IN(i,j) = left_buf_in[sw][kk++];
}
}
/* Apply the stencil operator */
for (j=MAX(jstart,RADIUS); j<=MIN(n-RADIUS-1,jend); j++) {
for (i=MAX(istart,RADIUS); i<=MIN(n-RADIUS-1,iend); i++) {
#if LOOPGEN
#include "loop_body_star.incl"
#else
for (jj=-RADIUS; jj<=RADIUS; jj++) OUT(i,j) += WEIGHT(0,jj)*IN(i,j+jj);
for (ii=-RADIUS; ii<0; ii++) OUT(i,j) += WEIGHT(ii,0)*IN(i+ii,j);
for (ii=1; ii<=RADIUS; ii++) OUT(i,j) += WEIGHT(ii,0)*IN(i+ii,j);
#endif
}
}
/* add constant to solution to force refresh of neighbor data, if any */
for (j=jstart; j<jend; j++) for (i=istart; i<iend; i++) IN(i,j)+= 1.0;
}
local_stencil_time[0] = wtime() - local_stencil_time[0];
shmem_barrier_all();
shmem_double_max_to_all(&stencil_time[0], &local_stencil_time[0], 1, 0, 0,
Num_procs, pWrk_time, pSync_reduce);
/* compute L1 norm in parallel */
local_norm[0] = (DTYPE) 0.0;
for (j=MAX(jstart,RADIUS); j<MIN(n-RADIUS,jend); j++) {
for (i=MAX(istart,RADIUS); i<MIN(n-RADIUS,iend); i++) {
local_norm[0] += (DTYPE)ABS(OUT(i,j));
}
}
shmem_barrier_all();
#ifdef DOUBLE
shmem_double_sum_to_all(&norm[0], &local_norm[0], 1, 0, 0, Num_procs, pWrk_norm, pSync_reduce);
#else
shmem_float_sum_to_all(&norm[0], &local_norm[0], 1, 0, 0, Num_procs, pWrk_norm, pSync_reduce);
#endif
/*******************************************************************************
** Analyze and output results.
********************************************************************************/
/* verify correctness */
if (my_ID == root) {
norm[0] /= f_active_points;
if (RADIUS > 0) {
reference_norm = (DTYPE) (iterations+1) * (COEFX + COEFY);
}
else {
reference_norm = (DTYPE) 0.0;
}
if (ABS(norm[0]-reference_norm) > EPSILON) {
printf("ERROR: L1 norm = "FSTR", Reference L1 norm = "FSTR"\n",
norm[0], reference_norm);
error = 1;
}
else {
printf("Solution validates\n");
#ifdef VERBOSE
printf("Reference L1 norm = "FSTR", L1 norm = "FSTR"\n",
reference_norm, norm[0]);
#endif
}
}
bail_out(error);
if (my_ID == root) {
/* flops/stencil: 2 flops (fma) for each point in the stencil,
plus one flop for the update of the input of the array */
flops = (DTYPE) (2*stencil_size+1) * f_active_points;
avgtime = stencil_time[0]/iterations;
printf("Rate (MFlops/s): "FSTR" Avg time (s): %lf\n",
1.0E-06 * flops/avgtime, avgtime);
}
prk_shmem_free(top_buf_in);
prk_shmem_free(right_buf_in);
free(top_buf_out);
free(right_buf_out);
prk_shmem_free(pSync_bcast);
prk_shmem_free(pSync_reduce);
prk_shmem_free(pWrk_time);
prk_shmem_free(pWrk_norm);
prk_shmem_finalize();
exit(EXIT_SUCCESS);
}
int main(int argc, char ** argv)
{
long Block_order; /* number of columns owned by rank */
int Block_size; /* size of a single block */
int Colblock_size; /* size of column block */
int Tile_order=32; /* default Tile order */
int tiling; /* boolean: true if tiling is used */
int Num_procs; /* number of ranks */
int order; /* order of overall matrix */
int bufferCount; /* number of input buffers */
int targetBuffer; /* buffer with which to communicate */
int send_to, recv_from; /* ranks with which to communicate */
long bytes; /* combined size of matrices */
int my_ID; /* rank */
int root=0; /* rank of root */
int iterations; /* number of times to do the transpose */
long i, j, it, jt, istart;/* dummies */
int iter; /* index of iteration */
int phase; /* phase inside staged communication */
int colstart; /* starting column for owning rank */
int error; /* error flag */
double *A_p; /* original matrix column block */
double *B_p; /* transposed matrix column block */
double **Work_in_p; /* workspace for the transpose function */
double *Work_out_p; /* workspace for the transpose function */
double epsilon = 1.e-8; /* error tolerance */
double avgtime; /* timing parameters */
long *pSync_bcast; /* work space for collectives */
long *pSync_reduce; /* work space for collectives */
double *pWrk; /* work space for SHMEM collectives */
double *local_trans_time,
*trans_time; /* timing parameters */
double *abserr,
*abserr_tot; /* local and aggregate error */
int *send_flag,
*recv_flag; /* synchronization flags */
int *arguments; /* command line arguments */
/*********************************************************************
** Initialize the SHMEM environment
*********************************************************************/
prk_shmem_init();
my_ID=prk_shmem_my_pe();
Num_procs=prk_shmem_n_pes();
if (my_ID == root) {
printf("Parallel Research Kernels version %s\n", PRKVERSION);
printf("SHMEM matrix transpose: B = A^T\n");
}
// initialize sync variables for error checks
pSync_bcast = (long *) prk_shmem_align(prk_get_alignment(),PRK_SHMEM_BCAST_SYNC_SIZE*sizeof(long));
pSync_reduce = (long *) prk_shmem_align(prk_get_alignment(),PRK_SHMEM_REDUCE_SYNC_SIZE*sizeof(long));
pWrk = (double *) prk_shmem_align(prk_get_alignment(),sizeof(double) * PRK_SHMEM_REDUCE_MIN_WRKDATA_SIZE);
local_trans_time = (double *) prk_shmem_align(prk_get_alignment(),sizeof(double));
trans_time = (double *) prk_shmem_align(prk_get_alignment(),sizeof(double));
arguments = (int *) prk_shmem_align(prk_get_alignment(),4*sizeof(int));
abserr = (double *) prk_shmem_align(prk_get_alignment(),2*sizeof(double));
abserr_tot = abserr + 1;
if (!pSync_bcast || !pSync_reduce || !pWrk || !local_trans_time ||
!trans_time || !arguments || !abserr) {
printf("Rank %d could not allocate scalar work space on symm heap\n", my_ID);
error = 1;
goto ENDOFTESTS;
}
for(i=0;i<PRK_SHMEM_BCAST_SYNC_SIZE;i++)
pSync_bcast[i]=PRK_SHMEM_SYNC_VALUE;
for(i=0;i<PRK_SHMEM_REDUCE_SYNC_SIZE;i++)
pSync_reduce[i]=PRK_SHMEM_SYNC_VALUE;
/*********************************************************************
** process, test and broadcast input parameters
*********************************************************************/
error = 0;
if (my_ID == root) {
if (argc != 4 && argc != 5){
printf("Usage: %s <# iterations> <matrix order> <# buffers> [Tile size]\n",
*argv);
error = 1; goto ENDOFTESTS;
}
iterations = atoi(*++argv);
arguments[0]=iterations;
if(iterations < 1){
printf("ERROR: iterations must be >= 1 : %d \n",iterations);
error = 1; goto ENDOFTESTS;
}
order = atoi(*++argv);
arguments[1]=order;
if (order < Num_procs) {
printf("ERROR: matrix order %d should at least # procs %d\n",
order, Num_procs);
error = 1; goto ENDOFTESTS;
}
if (order%Num_procs) {
printf("ERROR: matrix order %d should be divisible by # procs %d\n",
order, Num_procs);
error = 1; goto ENDOFTESTS;
}
bufferCount = atoi(*++argv);
arguments[2]=bufferCount;
if (Num_procs > 1) {
if ((bufferCount < 1) || (bufferCount >= Num_procs)) {
printf("ERROR: bufferCount must be >= 1 and < # procs : %d\n", bufferCount);
error = 1; goto ENDOFTESTS;
}
}
if (argc == 5) Tile_order = atoi(*++argv);
arguments[3]=Tile_order;
ENDOFTESTS:;
}
bail_out(error);
if (my_ID == root) {
printf("Number of ranks = %d\n", Num_procs);
printf("Matrix order = %d\n", order);
printf("Number of iterations = %d\n", iterations);
printf("Number of buffers = %d\n", bufferCount);
if ((Tile_order > 0) && (Tile_order < order))
printf("Tile size = %d\n", Tile_order);
else printf("Untiled\n");
}
shmem_barrier_all();
/* Broadcast input data to all ranks */
shmem_broadcast32(&arguments[0], &arguments[0], 4, root, 0, 0, Num_procs, pSync_bcast);
iterations=arguments[0];
order=arguments[1];
bufferCount=arguments[2];
Tile_order=arguments[3];
shmem_barrier_all();
prk_shmem_free(arguments);
/* a non-positive tile size means no tiling of the local transpose */
tiling = (Tile_order > 0) && (Tile_order < order);
bytes = 2 * sizeof(double) * order * order;
/*********************************************************************
** The matrix is broken up into column blocks that are mapped one to a
** rank. Each column block is made up of Num_procs smaller square
** blocks of order block_order.
*********************************************************************/
Block_order = order/Num_procs;
colstart = Block_order * my_ID;
Colblock_size = order * Block_order;
Block_size = Block_order * Block_order;
/*********************************************************************
** Create the column block of the test matrix, the row block of the
** transposed matrix, and workspace (workspace only if #procs>1)
*********************************************************************/
A_p = (double *)prk_malloc(Colblock_size*sizeof(double));
if (A_p == NULL){
printf(" Error allocating space for original matrix on node %d\n",my_ID);
error = 1;
}
bail_out(error);
B_p = (double *)prk_malloc(Colblock_size*sizeof(double));
if (B_p == NULL){
printf(" Error allocating space for transpose matrix on node %d\n",my_ID);
error = 1;
}
bail_out(error);
if (Num_procs>1) {
Work_in_p = (double**)prk_malloc(bufferCount*sizeof(double));
Work_out_p = (double *) prk_malloc(Block_size*sizeof(double));
recv_flag = (int*) prk_shmem_align(prk_get_alignment(),bufferCount*sizeof(int));
if ((Work_in_p == NULL)||(Work_out_p==NULL) || (recv_flag == NULL)){
printf(" Error allocating space for work or flags on node %d\n",my_ID);
error = 1;
}
if (bufferCount < (Num_procs - 1)) {
send_flag = (int*) prk_shmem_align(prk_get_alignment(), (Num_procs-1) * sizeof(int));
if (send_flag == NULL) {
printf("Error allocating space for flags on node %d\n", my_ID);
error = 1;
}
}
bail_out(error);
for(i=0;i<bufferCount;i++) {
Work_in_p[i]=(double *) prk_shmem_align(prk_get_alignment(),Block_size*sizeof(double));
if (Work_in_p[i] == NULL) {
printf(" Error allocating space for work on node %d\n",my_ID);
error = 1;
}
bail_out(error);
}
if (bufferCount < (Num_procs - 1)) {
for(i=0;i<(Num_procs-1);i++)
send_flag[i]=0;
}
for(i=0;i<bufferCount;i++)
recv_flag[i]=0;
}
/* Fill the original column matrices */
istart = 0;
for (j=0;j<Block_order;j++)
for (i=0;i<order; i++) {
A(i,j) = (double) (order*(j+colstart) + i);
B(i,j) = 0.0;
}
shmem_barrier_all();
if (bufferCount < (Num_procs - 1)) {
if (Num_procs > 1) {
for ( i = 0; i < bufferCount; i++) {
recv_from = (my_ID + i + 1)%Num_procs;
shmem_int_inc(&send_flag[i], recv_from);
}
}
}
shmem_barrier_all();
for (iter = 0; iter<=iterations; iter++){
/* start timer after a warmup iteration */
if (iter == 1) {
shmem_barrier_all();
local_trans_time[0] = wtime();
}
/* do the local transpose */
istart = colstart;
if (!tiling) {
for (i=0; i<Block_order; i++)
for (j=0; j<Block_order; j++) {
B(j,i) += A(i,j);
A(i,j) += 1.0;
}
}
else {
for (i=0; i<Block_order; i+=Tile_order)
for (j=0; j<Block_order; j+=Tile_order)
for (it=i; it<MIN(Block_order,i+Tile_order); it++)
for (jt=j; jt<MIN(Block_order,j+Tile_order);jt++) {
B(jt,it) += A(it,jt);
A(it,jt) += 1.0;
}
}
for (phase=1; phase<Num_procs; phase++){
recv_from = (my_ID + phase )%Num_procs;
send_to = (my_ID - phase + Num_procs)%Num_procs;
targetBuffer = (iter * (Num_procs - 1) + (phase - 1)) % bufferCount;
istart = send_to*Block_order;
if (!tiling) {
for (i=0; i<Block_order; i++)
for (j=0; j<Block_order; j++){
Work_out(j,i) = A(i,j);
A(i,j) += 1.0;
}
}
else {
for (i=0; i<Block_order; i+=Tile_order)
for (j=0; j<Block_order; j+=Tile_order)
for (it=i; it<MIN(Block_order,i+Tile_order); it++)
for (jt=j; jt<MIN(Block_order,j+Tile_order);jt++) {
Work_out(jt,it) = A(it,jt);
A(it,jt) += 1.0;
}
}
if (bufferCount < (Num_procs - 1))
shmem_int_wait_until(&send_flag[phase-1], SHMEM_CMP_EQ, iter+1);
shmem_double_put(&Work_in_p[targetBuffer][0], &Work_out_p[0], Block_size, send_to);
shmem_fence();
shmem_int_inc(&recv_flag[targetBuffer], send_to);
i = (iter * (Num_procs - 1) + phase) / bufferCount;
if ((iter * (Num_procs - 1) + phase) % bufferCount)
i++;
shmem_int_wait_until(&recv_flag[targetBuffer], SHMEM_CMP_EQ, i);
istart = recv_from*Block_order;
/* scatter received block to transposed matrix; no need to tile */
for (j=0; j<Block_order; j++)
for (i=0; i<Block_order; i++)
B(i,j) += Work_in(targetBuffer, i,j);
if (bufferCount < (Num_procs - 1)) {
if ((phase + bufferCount) < Num_procs)
recv_from = (my_ID + phase + bufferCount) % Num_procs;
else
recv_from = (my_ID + phase + bufferCount + 1 - Num_procs) % Num_procs;
shmem_int_inc(&send_flag[(phase+bufferCount-1)%(Num_procs-1)], recv_from);
}
} /* end of phase loop */
} /* end of iterations */
local_trans_time[0] = wtime() - local_trans_time[0];
shmem_barrier_all();
shmem_double_max_to_all(trans_time, local_trans_time, 1, 0, 0, Num_procs, pWrk, pSync_reduce);
abserr[0] = 0.0;
istart = 0;
double addit = ((double)(iterations+1) * (double) (iterations))/2.0;
for (j=0;j<Block_order;j++) for (i=0;i<order; i++) {
abserr[0] += ABS(B(i,j) - (double)((order*i + j+colstart)*(iterations+1)+addit));
}
shmem_barrier_all();
shmem_double_sum_to_all(abserr_tot, abserr, 1, 0, 0, Num_procs, pWrk, pSync_reduce);
if (my_ID == root) {
if (abserr_tot[0] <= epsilon) {
printf("Solution validates\n");
avgtime = trans_time[0]/(double)iterations;
printf("Rate (MB/s): %lf Avg time (s): %lf\n",1.0E-06*bytes/avgtime, avgtime);
#ifdef VERBOSE
printf("Summed errors: %f \n", abserr[0]);
#endif
}
else {
printf("ERROR: Aggregate squared error %e exceeds threshold %e\n", abserr[0], epsilon);
error = 1;
}
}
bail_out(error);
if (Num_procs>1)
{
if (bufferCount < (Num_procs - 1))
prk_shmem_free(send_flag);
prk_shmem_free(recv_flag);
prk_free(Work_out_p);
for(i=0;i<bufferCount;i++)
prk_shmem_free(Work_in_p[i]);
prk_free(Work_in_p);
}
prk_shmem_free(pSync_bcast);
prk_shmem_free(pSync_reduce);
prk_shmem_free(pWrk);
prk_shmem_finalize();
exit(EXIT_SUCCESS);
} /* end of main */