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#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef USE_MPI
#include <unistd.h>
#include <mpi.h>
#include <yaxt.h>
#include "pio_util.h"
#else
typedef int MPI_Comm;
#define MPI_COMM_NULL 0
#endif
#include "cdi.h"
#include "error.h"
#ifdef USE_MPI
#include "cdipio.h"
static int uniform_partition_start(int set_interval[2], int nparts, int part_idx);
#endif
static void
modelRun(MPI_Comm commModel)
{
enum
{
filetype = CDI_FILETYPE_GRB,
ntfiles = 2,
ntsteps = 3,
nVars = 5,
nlon = 12,
nlat = 6,
maxlev = 5
};
static int nlev[nVars] = { 1, 1, 5, 5, 2 };
static const char *name = "example";
int gridID, zaxisID[nVars], taxisID;
int vlistID, varID[nVars], streamID, tsID, tfID = 0;
int i, j, nmiss = 0;
double lons[nlon] = { 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 };
double lats[nlat] = { -75, -45, -15, 15, 45, 75 };
double levs[maxlev] = { 101300, 92500, 85000, 50000, 20000 };
double var[nlon * nlat * maxlev];
int vdate = 19850101, vtime = 120000;
char filename[1024];
size_t varSize[nVars];
#if USE_MPI
int rank, comm_size;
struct var1DDeco
{
int chunkSize, start;
Xt_idxlist partDesc;
} varDeco[nVars];
#endif
#ifndef USE_MPI
(void) commModel;
#endif
gridID = gridCreate(GRID_LONLAT, nlon * nlat);
gridDefXsize(gridID, nlon);
gridDefYsize(gridID, nlat);
gridDefXvals(gridID, lons);
gridDefYvals(gridID, lats);
for (i = 0; i < nVars; i++)
{
zaxisID[i] = zaxisCreate(ZAXIS_PRESSURE, nlev[i]);
zaxisDefLevels(zaxisID[i], levs);
varSize[i] = nlon * nlat * (size_t) nlev[i];
}
vlistID = vlistCreate();
#if USE_MPI
xmpi(MPI_Comm_rank(commModel, &rank));
xmpi(MPI_Comm_size(commModel, &comm_size));
#endif
for (i = 0; i < nVars; i++)
{
varID[i] = vlistDefVar(vlistID, gridID, zaxisID[i], TIME_VARIABLE);
#ifdef USE_MPI
{
int start = uniform_partition_start((int[2]){ 0, (int) varSize[i] - 1 }, comm_size, rank),
chunkSize = uniform_partition_start((int[2]){ 0, (int) varSize[i] - 1 }, comm_size, rank + 1) - start;
fprintf(stderr, "%d: start=%d, chunkSize = %d\n", rank, start, chunkSize);
Xt_idxlist idxlist = xt_idxstripes_new(&(struct Xt_stripe){ .start = start, .nstrides = chunkSize, .stride = 1 }, 1);
varDeco[i] = (struct var1DDeco){ .start = start, .chunkSize = chunkSize, .partDesc = idxlist };
}
#endif
}
taxisID = taxisCreate(TAXIS_ABSOLUTE);
vlistDefTaxis(vlistID, taxisID);
snprintf(&filename[0], sizeof(filename), "%s_%d.grb", name, tfID);
streamID = streamOpenWrite(filename, filetype);
xassert(streamID >= 0);
streamDefVlist(streamID, vlistID);
#ifdef USE_MPI
pioEndDef();
#endif
for (tfID = 0; tfID < ntfiles; tfID++)
{
/* if ( tfID > 0 ) */
{
streamClose(streamID);
snprintf(&filename[0], sizeof(filename), "%s_%d.grb", name, tfID);
streamID = streamOpenWrite(filename, filetype);
xassert(streamID >= 0);
streamDefVlist(streamID, vlistID);
}
for (tsID = 0; tsID < ntsteps; tsID++)
{
taxisDefVdate(taxisID, vdate);
taxisDefVtime(taxisID, vtime);
streamDefTimestep(streamID, tsID);
for (i = 0; i < nVars; i++)
{
#ifdef USE_MPI
int chunk = varDeco[i].chunkSize;
#else
int chunk = (int) varSize[i];
#endif
for (j = 0; j < chunk; ++j) var[j] = 2.2;
#ifdef USE_MPI
streamWriteVarPart(streamID, varID[i], var, nmiss, varDeco[i].partDesc);
#else
streamWriteVar(streamID, varID[i], var, nmiss);
#endif
}
#ifdef USE_MPI
pioWriteTimestep();
#endif
}
}
streamClose(streamID);
vlistDestroy(vlistID);
taxisDestroy(taxisID);
for (i = 0; i < nVars; i++) zaxisDestroy(zaxisID[i]);
gridDestroy(gridID);
#ifdef USE_MPI
for (int varIdx = 0; varIdx < nVars; ++varIdx) xt_idxlist_delete(varDeco[varIdx].partDesc);
MPI_Barrier(commModel);
#endif
}
int
main(int argc, char *argv[])
{
MPI_Comm commModel = MPI_COMM_NULL;
#ifdef USE_MPI
MPI_Comm commGlob;
int sizeGlob, rankGlob, pioNamespace;
int IOMode = PIO_WRITER;
int nProcsIO = 2;
xmpi(MPI_Init(&argc, &argv));
commGlob = MPI_COMM_WORLD;
xt_initialize(commGlob);
xmpi(MPI_Comm_set_errhandler(commGlob, MPI_ERRORS_RETURN));
xmpi(MPI_Comm_size(commGlob, &sizeGlob));
xmpi(MPI_Comm_rank(commGlob, &rankGlob));
{
int opt;
while ((opt = getopt(argc, argv, "p:w:")) != -1) switch (opt)
{
case 'p':
IOMode = cdiPioStr2IOMode(optarg);
if (IOMode < 0)
{
fprintf(stderr, "Unsupported PIO mode requested: %s\n", optarg);
exit(EXIT_FAILURE);
}
break;
case 'w':
{
long temp = strtol(optarg, NULL, 0);
if (temp < 0 || temp > INT_MAX / 2)
{
fprintf(stderr, "Unsupported number of I/O servers: %ld\n", temp);
exit(EXIT_FAILURE);
}
nProcsIO = (int) temp;
break;
}
}
}
commModel = pioInit(commGlob, nProcsIO, IOMode, &pioNamespace, 1.0f, cdiPioNoPostCommSetup);
if (commModel != MPI_COMM_NULL)
{
namespaceSetActive(pioNamespace);
#else
(void) argc;
(void) argv;
#endif
modelRun(commModel);
#ifdef USE_MPI
}
pioFinalize();
xt_finalize();
MPI_Finalize();
#endif
return 0;
}
#ifdef USE_MPI
static int
uniform_partition_start(int set_interval[2], int nparts, int part_idx)
{
int part_offset
= (int) ((((long long) set_interval[1] - (long long) set_interval[0] + 1LL) * (long long) part_idx) / (long long) nparts);
int start = set_interval[0] + part_offset;
return start;
}
#endif
/*
* Local Variables:
* c-file-style: "Java"
* c-basic-offset: 2
* indent-tabs-mode: nil
* show-trailing-whitespace: t
* require-trailing-newline: t
* End:
*/
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