/* This creates a netCDF file in the specified format, with some
* sample values. */
int create_file(MPI_Comm comm, int iosysid, int format, char *filename,
char *attname, char *dimname, int my_rank)
{
int ncid, varid, dimid;
int ret;
/* Create the file. */
if ((ret = PIOc_createfile(iosysid, &ncid, &format, filename, NC_CLOBBER)))
return ret;
/* Define a dimension. */
if ((ret = PIOc_def_dim(ncid, dimname, PIO_TF_MAX_STR_LEN, &dimid)))
return ret;
/* Define a 1-D variable. */
if ((ret = PIOc_def_var(ncid, attname, NC_CHAR, 1, &dimid, &varid)))
return ret;
/* Write an attribute. */
if ((ret = PIOc_put_att_text(ncid, varid, attname, strlen(filename), filename)))
return ret;
/* End define mode. */
if ((ret = PIOc_enddef(ncid)))
return ret;
/* Close the file. */
if ((ret = PIOc_closefile(ncid)))
return ret;
return PIO_NOERR;
}
/**
* Test the darray functionality. Create a netCDF file with 4
* dimensions and 1 PIO_INT variable, and use darray to write some
* data.
*
* @param iosysid the IO system ID.
* @param ioid the ID of the decomposition.
* @param num_flavors the number of IOTYPES available in this build.
* @param flavor array of available iotypes.
* @param my_rank rank of this task.
* @param provide_fill 1 if fillvalue should be provided to PIOc_write_darray().
* @returns 0 for success, error code otherwise.
*/
int test_darray(int iosysid, int ioid, int num_flavors, int *flavor, int my_rank,
int provide_fill)
{
char filename[PIO_MAX_NAME + 1]; /* Name for the output files. */
int dimids[NDIM]; /* The dimension IDs. */
int ncid; /* The ncid of the netCDF file. */
int ncid2; /* The ncid of the re-opened netCDF file. */
int varid; /* The ID of the netCDF varable. */
int ret; /* Return code. */
PIO_Offset arraylen = 16;
int int_fillvalue = NC_FILL_INT;
void *fillvalue = NULL;
int test_data[arraylen];
int test_data2[arraylen];
int test_data_in[arraylen];
/* Initialize some data. */
for (int f = 0; f < arraylen; f++)
{
test_data[f] = my_rank * 10 + f;
test_data2[f] = 2 * (my_rank * 10 + f);
}
/* Are we providing a fill value? */
if (provide_fill)
fillvalue = &int_fillvalue;
/* Use PIO to create the example file in each of the four
* available ways. */
for (int fmt = 0; fmt < num_flavors; fmt++)
{
/* Create the filename. */
sprintf(filename, "data_%s_iotype_%d.nc", TEST_NAME, flavor[fmt]);
/* Create the netCDF output file. */
if ((ret = PIOc_createfile(iosysid, &ncid, &flavor[fmt], filename, PIO_CLOBBER)))
ERR(ret);
/* Turn on fill mode. */
if ((ret = PIOc_set_fill(ncid, NC_FILL, NULL)))
ERR(ret);
/* Define netCDF dimensions and variable. */
for (int d = 0; d < NDIM; d++)
if ((ret = PIOc_def_dim(ncid, dim_name[d], (PIO_Offset)dim_len[d], &dimids[d])))
ERR(ret);
/* Define a variable. */
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_INT, NDIM, dimids, &varid)))
ERR(ret);
/* End define mode. */
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Set the value of the record dimension. */
if ((ret = PIOc_setframe(ncid, varid, 0)))
ERR(ret);
/* Write the data. */
if ((ret = PIOc_write_darray(ncid, varid, ioid, arraylen, test_data, fillvalue)))
ERR(ret);
/* Set the value of the record dimension to the second record. */
if ((ret = PIOc_setframe(ncid, varid, 1)))
ERR(ret);
/* Write the data for the second record. */
if ((ret = PIOc_write_darray(ncid, varid, ioid, arraylen, test_data2, fillvalue)))
ERR(ret);
/* Close the netCDF file. */
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
/* Reopen the file. */
if ((ret = PIOc_openfile(iosysid, &ncid2, &flavor[fmt], filename, PIO_NOWRITE)))
ERR(ret);
/* Set the value of the record dimension. */
if ((ret = PIOc_setframe(ncid2, varid, 0)))
ERR(ret);
/* Read the data. */
if ((ret = PIOc_read_darray(ncid2, varid, ioid, arraylen, test_data_in)))
ERR(ret);
/* Check the results. */
for (int f = 0; f < arraylen; f++)
if (test_data_in[f] != test_data[f])
return ERR_WRONG;
/* Set the value of the record dimension to the second record. */
if ((ret = PIOc_setframe(ncid2, varid, 1)))
ERR(ret);
/* Read the data. */
if ((ret = PIOc_read_darray(ncid2, varid, ioid, arraylen, test_data_in)))
ERR(ret);
/* Check the results. */
for (int f = 0; f < arraylen; f++)
if (test_data_in[f] != test_data2[f])
return ERR_WRONG;
/* Close the netCDF file. */
if ((ret = PIOc_closefile(ncid2)))
ERR(ret);
}
return PIO_NOERR;
}
/** Run Tests for NetCDF-4 Functions.
*
* @param argc argument count
* @param argv array of arguments
*/
int
main(int argc, char **argv)
{
int verbose = 1;
/** Zero-based rank of processor. */
int my_rank;
/** Number of processors involved in current execution. */
int ntasks;
/** Different output flavors. The example file is written (and
* then read) four times. The first two flavors,
* parallel-netcdf, and netCDF serial, both produce a netCDF
* classic format file (but with different libraries). The
* last two produce netCDF4/HDF5 format files, written with
* and without using netCDF-4 parallel I/O. */
int format[NUM_NETCDF_FLAVORS] = {PIO_IOTYPE_PNETCDF,
PIO_IOTYPE_NETCDF,
PIO_IOTYPE_NETCDF4C,
PIO_IOTYPE_NETCDF4P};
/** Names for the output files. Two of them (pnetcdf and
* classic) will be in classic netCDF format, the others
* (serial4 and parallel4) will be in netCDF-4/HDF5
* format. All four can be read by the netCDF library, and all
* will contain the same contents. */
char filename[NUM_NETCDF_FLAVORS][NC_MAX_NAME + 1] = {"test_nc4_pnetcdf.nc",
"test_nc4_classic.nc",
"test_nc4_serial4.nc",
"test_nc4_parallel4.nc"};
/** Number of processors that will do IO. In this example we
* will do IO from all processors. */
int niotasks;
/** Stride in the mpi rank between io tasks. Always 1 in this
* example. */
int ioproc_stride = 1;
/** Number of the aggregator? Always 0 in this example. */
int numAggregator = 0;
/** Zero based rank of first processor to be used for I/O. */
int ioproc_start = 0;
/** Specifies the flavor of netCDF output format. */
int iotype;
/** The dimension IDs. */
int dimids[NDIM];
/** Array index per processing unit. This is the number of
* elements of the data array that will be handled by each
* processor. In this example there are 16 data elements. If the
* example is run on 4 processors, then arrIdxPerPe will be 4. */
PIO_Offset elements_per_pe;
/** The ID for the parallel I/O system. It is set by
* PIOc_Init_Intracomm(). It references an internal structure
* containing the general IO subsystem data and MPI
* structure. It is passed to PIOc_finalize() to free
* associated resources, after all I/O, but before
* MPI_Finalize is called. */
int iosysid;
/** The ncid of the netCDF file created in this example. */
int ncid = 0;
/** The ID of the netCDF varable in the example file. */
int varid;
/** The I/O description ID as passed back by PIOc_InitDecomp()
* and freed in PIOc_freedecomp(). */
int ioid;
/** A buffer for sample data. The size of this array will
* vary depending on how many processors are involved in the
* execution of the example code. It's length will be the same
* as elements_per_pe.*/
float *buffer;
/** A buffer for reading data back from the file. The size of
* this array will vary depending on how many processors are
* involved in the execution of the example code. It's length
* will be the same as elements_per_pe.*/
int *read_buffer;
/** A 1-D array which holds the decomposition mapping for this
* example. The size of this array will vary depending on how
* many processors are involved in the execution of the
* example code. It's length will be the same as
* elements_per_pe. */
PIO_Offset *compdof;
/** Return code. */
int ret;
#ifdef TIMING
/* Initialize the GPTL timing library. */
if ((ret = GPTLinitialize ()))
return ret;
#endif
/* Initialize MPI. */
if ((ret = MPI_Init(&argc, &argv)))
MPIERR(ret);
if ((ret = MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN)))
MPIERR(ret);
/* Learn my rank and the total number of processors. */
if ((ret = MPI_Comm_rank(MPI_COMM_WORLD, &my_rank)))
MPIERR(ret);
if ((ret = MPI_Comm_size(MPI_COMM_WORLD, &ntasks)))
MPIERR(ret);
/* Check that a valid number of processors was specified. */
if (!(ntasks == 1 || ntasks == 2 || ntasks == 4 ||
ntasks == 8 || ntasks == 16))
fprintf(stderr, "Number of processors must be 1, 2, 4, 8, or 16!\n");
if (verbose)
printf("%d: ParallelIO Library example1 running on %d processors.\n",
my_rank, ntasks);
/* keep things simple - 1 iotask per MPI process */
niotasks = ntasks;
/* Initialize the PIO IO system. This specifies how
* many and which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(MPI_COMM_WORLD, niotasks, ioproc_stride,
ioproc_start, PIO_REARR_SUBSET, &iosysid)))
ERR(ret);
/* Describe the decomposition. This is a 1-based array, so add 1! */
elements_per_pe = X_DIM_LEN * Y_DIM_LEN / ntasks;
if (!(compdof = malloc(elements_per_pe * sizeof(PIO_Offset))))
return PIO_ENOMEM;
for (int i = 0; i < elements_per_pe; i++) {
compdof[i] = my_rank * elements_per_pe + i + 1;
}
/* Create the PIO decomposition for this test. */
if (verbose)
printf("rank: %d Creating decomposition...\n", my_rank);
if ((ret = PIOc_InitDecomp(iosysid, PIO_FLOAT, 2, &dim_len[1], (PIO_Offset)elements_per_pe,
compdof, &ioid, NULL, NULL, NULL)))
ERR(ret);
free(compdof);
#ifdef HAVE_MPE
/* Log with MPE that we are done with INIT. */
if ((ret = MPE_Log_event(event_num[END][INIT], 0, "end init")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Use PIO to create the example file in each of the four
* available ways. */
for (int fmt = 0; fmt < NUM_NETCDF_FLAVORS; fmt++)
{
#ifdef HAVE_MPE
/* Log with MPE that we are starting CREATE. */
if ((ret = MPE_Log_event(event_num[START][CREATE_PNETCDF+fmt], 0, "start create")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Create the netCDF output file. */
if (verbose)
printf("rank: %d Creating sample file %s with format %d...\n",
my_rank, filename[fmt], format[fmt]);
if ((ret = PIOc_createfile(iosysid, &ncid, &(format[fmt]), filename[fmt],
PIO_CLOBBER)))
ERR(ret);
/* Define netCDF dimensions and variable. */
if (verbose)
printf("rank: %d Defining netCDF metadata...\n", my_rank);
for (int d = 0; d < NDIM; d++) {
if (verbose)
printf("rank: %d Defining netCDF dimension %s, length %d\n", my_rank,
dim_name[d], dim_len[d]);
if ((ret = PIOc_def_dim(ncid, dim_name[d], (PIO_Offset)dim_len[d], &dimids[d])))
ERR(ret);
}
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_FLOAT, NDIM, dimids, &varid)))
ERR(ret);
/* For netCDF-4 files, set the chunksize to improve performance. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C || format[fmt] == PIO_IOTYPE_NETCDF4P)
{
if ((ret = PIOc_def_var_chunking(ncid, 0, NC_CHUNKED, chunksize)))
ERR(ret);
/** Check that the inq_var_chunking function works. */
int storage;
size_t my_chunksize[NDIM];
if ((ret = PIOc_inq_var_chunking(ncid, 0, &storage, my_chunksize)))
ERR(ret);
/** For serial netCDF-4, only processor rank 0 gets the answers. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C && !my_rank ||
format[fmt] == PIO_IOTYPE_NETCDF4P)
{
if (storage != NC_CHUNKED)
ERR(ERR_AWFUL);
for (int d = 0; d < NDIM; d++)
if (my_chunksize[d] != chunksize[d])
ERR(ERR_AWFUL);
}
/* Check that the inv_var_deflate functions works. */
int shuffle;
int deflate;
int deflate_level;
if ((ret = PIOc_inq_var_deflate(ncid, 0, &shuffle, &deflate, &deflate_level)))
ERR(ret);
/** For serial netCDF-4, only processor rank 0 gets the
* answers. Also deflate is turned on by default */
if (format[fmt] == PIO_IOTYPE_NETCDF4C && !my_rank)
if (shuffle || !deflate || deflate_level != 1)
ERR(ERR_AWFUL);
/* For parallel netCDF, no compression available. :-( */
if (format[fmt] == PIO_IOTYPE_NETCDF4P)
if (shuffle || deflate)
ERR(ERR_AWFUL);
} else {
/* Trying to set chunking for non-netCDF-4 files results
* in the PIO_ENOTNC4 error. */
if ((ret = PIOc_def_var_chunking(ncid, 0, NC_CHUNKED, chunksize)) != PIO_ENOTNC4)
ERR(ERR_AWFUL);
}
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Close the netCDF file. */
if (verbose)
printf("rank: %d Closing the sample data file...\n", my_rank);
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
}
/* Free the PIO decomposition. */
if (verbose)
printf("rank: %d Freeing PIO decomposition...\n", my_rank);
if ((ret = PIOc_freedecomp(iosysid, ioid)))
ERR(ret);
/* Finalize the IO system. */
if (verbose)
printf("rank: %d Freeing PIO resources...\n", my_rank);
if ((ret = PIOc_finalize(iosysid)))
ERR(ret);
/* Finalize the MPI library. */
MPI_Finalize();
#ifdef TIMING
/* Finalize the GPTL timing library. */
if ((ret = GPTLfinalize ()))
return ret;
#endif
return 0;
}
/** Run Tests for NetCDF-4 Functions.
*
* @param argc argument count
* @param argv array of arguments
*/
int
main(int argc, char **argv)
{
int verbose = 1;
/** Zero-based rank of processor. */
int my_rank;
/** Number of processors involved in current execution. */
int ntasks;
/** Specifies the flavor of netCDF output format. */
int iotype;
/** Different output flavors. */
int format[NUM_NETCDF_FLAVORS] = {PIO_IOTYPE_PNETCDF,
PIO_IOTYPE_NETCDF,
PIO_IOTYPE_NETCDF4C,
PIO_IOTYPE_NETCDF4P};
/** Names for the output files. */
char filename[NUM_NETCDF_FLAVORS][NC_MAX_NAME + 1] = {"test_names_pnetcdf.nc",
"test_names_classic.nc",
"test_names_serial4.nc",
"test_names_parallel4.nc"};
/** Number of processors that will do IO. In this test we
* will do IO from all processors. */
int niotasks;
/** Stride in the mpi rank between io tasks. Always 1 in this
* test. */
int ioproc_stride = 1;
/** Number of the aggregator? Always 0 in this test. */
int numAggregator = 0;
/** Zero based rank of first processor to be used for I/O. */
int ioproc_start = 0;
/** The dimension IDs. */
int dimids[NDIM];
/** Array index per processing unit. */
PIO_Offset elements_per_pe;
/** The ID for the parallel I/O system. */
int iosysid;
/** The ncid of the netCDF file. */
int ncid = 0;
/** The ID of the netCDF varable. */
int varid;
/** Storage of netCDF-4 files (contiguous vs. chunked). */
int storage;
/** Chunksizes set in the file. */
size_t my_chunksize[NDIM];
/** The shuffle filter setting in the netCDF-4 test file. */
int shuffle;
/** Non-zero if deflate set for the variable in the netCDF-4 test file. */
int deflate;
/** The deflate level set for the variable in the netCDF-4 test file. */
int deflate_level;
/** Non-zero if fletcher32 filter is used for variable. */
int fletcher32;
/** Endianness of variable. */
int endianness;
/* Size of the file chunk cache. */
size_t chunk_cache_size;
/* Number of elements in file cache. */
size_t nelems;
/* File cache preemption. */
float preemption;
/* Size of the var chunk cache. */
size_t var_cache_size;
/* Number of elements in var cache. */
size_t var_cache_nelems;
/* Var cache preemption. */
float var_cache_preemption;
/** The I/O description ID. */
int ioid;
/** A buffer for sample data. */
float *buffer;
/** A buffer for reading data back from the file. */
int *read_buffer;
/** The decomposition mapping. */
PIO_Offset *compdof;
/** Return code. */
int ret;
/** Index for loops. */
int fmt, d, d1, i;
#ifdef TIMING
/* Initialize the GPTL timing library. */
if ((ret = GPTLinitialize ()))
return ret;
#endif
/* Initialize MPI. */
if ((ret = MPI_Init(&argc, &argv)))
MPIERR(ret);
/* Learn my rank and the total number of processors. */
if ((ret = MPI_Comm_rank(MPI_COMM_WORLD, &my_rank)))
MPIERR(ret);
if ((ret = MPI_Comm_size(MPI_COMM_WORLD, &ntasks)))
MPIERR(ret);
/* Check that a valid number of processors was specified. */
if (!(ntasks == 1 || ntasks == 2 || ntasks == 4 ||
ntasks == 8 || ntasks == 16))
fprintf(stderr, "Number of processors must be 1, 2, 4, 8, or 16!\n");
if (verbose)
printf("%d: ParallelIO Library example1 running on %d processors.\n",
my_rank, ntasks);
/* keep things simple - 1 iotask per MPI process */
niotasks = ntasks;
/* Initialize the PIO IO system. This specifies how
* many and which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(MPI_COMM_WORLD, niotasks, ioproc_stride,
ioproc_start, PIO_REARR_SUBSET, &iosysid)))
ERR(ret);
/* Describe the decomposition. This is a 1-based array, so add 1! */
elements_per_pe = X_DIM_LEN * Y_DIM_LEN / ntasks;
if (!(compdof = malloc(elements_per_pe * sizeof(PIO_Offset))))
return PIO_ENOMEM;
for (i = 0; i < elements_per_pe; i++) {
compdof[i] = my_rank * elements_per_pe + i + 1;
}
/* Create the PIO decomposition for this test. */
if (verbose)
printf("rank: %d Creating decomposition...\n", my_rank);
if ((ret = PIOc_InitDecomp(iosysid, PIO_FLOAT, 2, &dim_len[1], (PIO_Offset)elements_per_pe,
compdof, &ioid, NULL, NULL, NULL)))
ERR(ret);
free(compdof);
/* How many flavors will we be running for? */
int num_flavors = 0;
int fmtidx = 0;
#ifdef _PNETCDF
num_flavors++;
format[fmtidx++] = PIO_IOTYPE_PNETCDF;
#endif
#ifdef _NETCDF
num_flavors++;
format[fmtidx++] = PIO_IOTYPE_NETCDF;
#endif
#ifdef _NETCDF4
num_flavors += 2;
format[fmtidx++] = PIO_IOTYPE_NETCDF4C;
format[fmtidx] = PIO_IOTYPE_NETCDF4P;
#endif
/* Use PIO to create the example file in each of the four
* available ways. */
for (fmt = 0; fmt < num_flavors; fmt++)
{
/* Create the netCDF output file. */
if (verbose)
printf("rank: %d Creating sample file %s with format %d...\n",
my_rank, filename[fmt], format[fmt]);
if ((ret = PIOc_createfile(iosysid, &ncid, &(format[fmt]), filename[fmt],
PIO_CLOBBER)))
ERR(ret);
/* Define netCDF dimensions and variable. */
if (verbose)
printf("rank: %d Defining netCDF metadata...\n", my_rank);
for (d = 0; d < NDIM; d++) {
if (verbose)
printf("rank: %d Defining netCDF dimension %s, length %d\n", my_rank,
dim_name[d], dim_len[d]);
if ((ret = PIOc_def_dim(ncid, dim_name[d], (PIO_Offset)dim_len[d], &dimids[d])))
ERR(ret);
}
/* Check the dimension names. */
if ((ret = check_dim_names(my_rank, ncid, verbose)))
ERR(ret);
/* Define a global attribute. */
int att_val = 42;
if ((ret = PIOc_put_att_int(ncid, NC_GLOBAL, ATT_NAME, NC_INT, 1, &att_val)))
ERR(ret);
/* Check the attribute name. */
if ((ret = check_att_name(my_rank, ncid, verbose)))
ERR(ret);
/* Define a variable. */
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_FLOAT, NDIM, dimids, &varid)))
ERR(ret);
/* Check the variable name. */
if ((ret = check_var_name(my_rank, ncid, verbose)))
ERR(ret);
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Close the netCDF file. */
if (verbose)
printf("rank: %d Closing the sample data file...\n", my_rank);
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
/* Put a barrier here to make verbose output look better. */
if ((ret = MPI_Barrier(MPI_COMM_WORLD)))
MPIERR(ret);
}
/* Free the PIO decomposition. */
if (verbose)
printf("rank: %d Freeing PIO decomposition...\n", my_rank);
if ((ret = PIOc_freedecomp(iosysid, ioid)))
ERR(ret);
/* Finalize the IO system. */
if (verbose)
printf("rank: %d Freeing PIO resources...\n", my_rank);
if ((ret = PIOc_finalize(iosysid)))
ERR(ret);
/* Finalize the MPI library. */
MPI_Finalize();
#ifdef TIMING
/* Finalize the GPTL timing library. */
if ((ret = GPTLfinalize ()))
return ret;
#endif
return 0;
}
/** Main execution of code.
Executes the functions to:
- create a new examplePioClass instance
- initialize MPI and the ParallelIO libraries
- create the decomposition for this example
- create the netCDF output file
- define the variable in the file
- write data to the variable in the file using decomposition
- read the data back from the file using decomposition
- close the file
- clean up resources
The example can be run from the command line (on system that support it) like this:
<pre>
mpiexec -n 4 ./examplePio
</pre>
The sample file created by this program is a small netCDF file. It
has the following contents (as shown by ncdump) for a 4-processor
run:
<pre>
netcdf examplePio_c {
dimensions:
x = 16 ;
variables:
int foo(x) ;
data:
foo = 42, 42, 42, 42, 43, 43, 43, 43, 44, 44, 44, 44, 45, 45, 45, 45 ;
}
</pre>
@param [in] argc argument count (should be zero)
@param [in] argv argument array (should be NULL)
@retval examplePioClass* Pointer to self.
*/
int main(int argc, char* argv[])
{
/** Set to non-zero to get output to stdout. */
int verbose = 0;
/** Zero-based rank of processor. */
int my_rank;
/** Number of processors involved in current execution. */
int ntasks;
/** Different output flavors. The example file is written (and
* then read) four times. The first two flavors,
* parallel-netcdf, and netCDF serial, both produce a netCDF
* classic format file (but with different libraries). The
* last two produce netCDF4/HDF5 format files, written with
* and without using netCDF-4 parallel I/O. */
int format[NUM_NETCDF_FLAVORS] = {PIO_IOTYPE_PNETCDF,
PIO_IOTYPE_NETCDF,
PIO_IOTYPE_NETCDF4C,
PIO_IOTYPE_NETCDF4P};
/** Names for the output files. Two of them (pnetcdf and
* classic) will be in classic netCDF format, the others
* (serial4 and parallel4) will be in netCDF-4/HDF5
* format. All four can be read by the netCDF library, and all
* will contain the same contents. */
char filename[NUM_NETCDF_FLAVORS][NC_MAX_NAME + 1] = {"example2_pnetcdf.nc",
"example2_classic.nc",
"example2_serial4.nc",
"example2_parallel4.nc"};
/** Number of processors that will do IO. In this example we
* will do IO from all processors. */
int niotasks;
/** Stride in the mpi rank between io tasks. Always 1 in this
* example. */
int ioproc_stride = 1;
/** Number of the aggregator? Always 0 in this example. */
int numAggregator = 0;
/** Zero based rank of first processor to be used for I/O. */
int ioproc_start = 0;
/** Specifies the flavor of netCDF output format. */
int iotype;
/** The dimension IDs. */
int dimids[NDIM];
/** Array index per processing unit. This is the number of
* elements of the data array that will be handled by each
* processor. In this example there are 16 data elements. If the
* example is run on 4 processors, then arrIdxPerPe will be 4. */
PIO_Offset elements_per_pe;
/** The ID for the parallel I/O system. It is set by
* PIOc_Init_Intracomm(). It references an internal structure
* containing the general IO subsystem data and MPI
* structure. It is passed to PIOc_finalize() to free
* associated resources, after all I/O, but before
* MPI_Finalize is called. */
int iosysid;
/** The ncid of the netCDF file created in this example. */
int ncid = 0;
/** The ID of the netCDF varable in the example file. */
int varid;
/** The I/O description ID as passed back by PIOc_InitDecomp()
* and freed in PIOc_freedecomp(). */
int ioid;
/** A buffer for sample data. The size of this array will
* vary depending on how many processors are involved in the
* execution of the example code. It's length will be the same
* as elements_per_pe.*/
float *buffer;
/** A buffer for reading data back from the file. The size of
* this array will vary depending on how many processors are
* involved in the execution of the example code. It's length
* will be the same as elements_per_pe.*/
int *read_buffer;
/** A 1-D array which holds the decomposition mapping for this
* example. The size of this array will vary depending on how
* many processors are involved in the execution of the
* example code. It's length will be the same as
* elements_per_pe. */
PIO_Offset *compdof;
#ifdef HAVE_MPE
/** MPE event numbers used to track start and stop of
* different parts of the program for later display with
* Jumpshot. */
int event_num[2][NUM_EVENTS];
#endif /* HAVE_MPE */
/** Needed for command line processing. */
int c;
/* Parse command line. */
while ((c = getopt(argc, argv, "v")) != -1)
switch (c)
{
case 'v':
verbose++;
break;
default:
break;
}
#ifdef TIMING
/* Initialize the GPTL timing library. */
int ret;
if ((ret = GPTLinitialize ()))
return ret;
#endif
/* Initialize MPI. */
if ((ret = MPI_Init(&argc, &argv)))
MPIERR(ret);
if ((ret = MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN)))
MPIERR(ret);
/* Learn my rank and the total number of processors. */
if ((ret = MPI_Comm_rank(MPI_COMM_WORLD, &my_rank)))
MPIERR(ret);
if ((ret = MPI_Comm_size(MPI_COMM_WORLD, &ntasks)))
MPIERR(ret);
/* Check that a valid number of processors was specified. */
if (!(ntasks == 1 || ntasks == 2 || ntasks == 4 ||
ntasks == 8 || ntasks == 16))
fprintf(stderr, "Number of processors must be 1, 2, 4, 8, or 16!\n");
if (verbose)
printf("%d: ParallelIO Library example1 running on %d processors.\n",
my_rank, ntasks);
#ifdef HAVE_MPE
/* Initialize MPE logging. */
if ((ret = MPE_Init_log()))
ERR(ret);
if (init_logging(my_rank, event_num))
ERR(ERR_LOGGING);
/* Log with MPE that we are starting INIT. */
if ((ret = MPE_Log_event(event_num[START][INIT], 0, "start init")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* keep things simple - 1 iotask per MPI process */
niotasks = ntasks;
/* Initialize the PIO IO system. This specifies how
* many and which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(MPI_COMM_WORLD, niotasks, ioproc_stride,
ioproc_start, PIO_REARR_SUBSET, &iosysid)))
ERR(ret);
/* Describe the decomposition. This is a 1-based array, so add 1! */
elements_per_pe = X_DIM_LEN * Y_DIM_LEN / ntasks;
if (!(compdof = malloc(elements_per_pe * sizeof(PIO_Offset))))
return PIO_ENOMEM;
for (int i = 0; i < elements_per_pe; i++) {
compdof[i] = my_rank * elements_per_pe + i + 1;
}
/* Create the PIO decomposition for this example. */
if (verbose)
printf("rank: %d Creating decomposition...\n", my_rank);
if ((ret = PIOc_InitDecomp(iosysid, PIO_FLOAT, 2, &dim_len[1], (PIO_Offset)elements_per_pe,
compdof, &ioid, NULL, NULL, NULL)))
ERR(ret);
free(compdof);
#ifdef HAVE_MPE
/* Log with MPE that we are done with INIT. */
if ((ret = MPE_Log_event(event_num[END][INIT], 0, "end init")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Use PIO to create the example file in each of the four
* available ways. */
for (int fmt = 0; fmt < NUM_NETCDF_FLAVORS; fmt++)
{
#ifdef HAVE_MPE
/* Log with MPE that we are starting CREATE. */
if ((ret = MPE_Log_event(event_num[START][CREATE_PNETCDF+fmt], 0, "start create")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Create the netCDF output file. */
if (verbose)
printf("rank: %d Creating sample file %s with format %d...\n",
my_rank, filename[fmt], format[fmt]);
if ((ret = PIOc_createfile(iosysid, &ncid, &(format[fmt]), filename[fmt],
PIO_CLOBBER)))
ERR(ret);
/* Define netCDF dimensions and variable. */
if (verbose)
printf("rank: %d Defining netCDF metadata...\n", my_rank);
for (int d = 0; d < NDIM; d++) {
if (verbose)
printf("rank: %d Defining netCDF dimension %s, length %d\n", my_rank,
dim_name[d], dim_len[d]);
if ((ret = PIOc_def_dim(ncid, dim_name[d], (PIO_Offset)dim_len[d], &dimids[d])))
ERR(ret);
}
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_FLOAT, NDIM, dimids, &varid)))
ERR(ret);
/* For netCDF-4 files, set the chunksize to improve performance. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C || format[fmt] == PIO_IOTYPE_NETCDF4P)
if ((ret = PIOc_def_var_chunking(ncid, 0, NC_CHUNKED, chunksize)))
ERR(ret);
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
#ifdef HAVE_MPE
/* Log with MPE that we are done with CREATE. */
if ((ret = MPE_Log_event(event_num[END][CREATE_PNETCDF + fmt], 0, "end create")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Allocate space for sample data. */
if (!(buffer = malloc(elements_per_pe * sizeof(float))))
return PIO_ENOMEM;
/* Write data for each timestep. */
for (int ts = 0; ts < NUM_TIMESTEPS; ts++) {
#ifdef HAVE_MPE
/* Log with MPE that we are starting CALCULATE. */
if ((ret = MPE_Log_event(event_num[START][CALCULATE], 0, "start calculate")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Calculate sample data. Add some math function calls to make this slower. */
for (int i = 0; i < elements_per_pe; i++)
if ((ret = calculate_value(my_rank, ts, &buffer[i])))
ERR(ret);
#ifdef HAVE_MPE
/* Log with MPE that we are done with CALCULATE. */
if ((ret = MPE_Log_event(event_num[END][CALCULATE], 0, "end calculate")))
MPIERR(ret);
/* Log with MPE that we are starting WRITE. */
if ((ret = MPE_Log_event(event_num[START][WRITE], 0, "start write")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Write data to the file. */
if (verbose)
printf("rank: %d Writing sample data...\n", my_rank);
if ((ret = PIOc_setframe(ncid, varid, ts)))
ERR(ret);
if ((ret = PIOc_write_darray(ncid, varid, ioid, (PIO_Offset)elements_per_pe,
buffer, NULL)))
ERR(ret);
if ((ret = PIOc_sync(ncid)))
ERR(ret);
#ifdef HAVE_MPE
/* Log with MPE that we are done with WRITE. */
if ((ret = MPE_Log_event(event_num[END][WRITE], 0, "end write")))
MPIERR(ret);
#endif /* HAVE_MPE */
}
#ifdef HAVE_MPE
/* Log with MPE that we are starting CLOSE. */
if ((ret = MPE_Log_event(event_num[START][CLOSE], 0, "start close")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Free buffer space used in this example. */
free(buffer);
/* Close the netCDF file. */
if (verbose)
printf("rank: %d Closing the sample data file...\n", my_rank);
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
#ifdef HAVE_MPE
/* Log with MPE that we are done with CLOSE. */
if ((ret = MPE_Log_event(event_num[END][CLOSE], 0, "end close")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* After each file is closed, make all processors wait so that
* all start creating the next file at the same time. */
if ((ret = MPI_Barrier(MPI_COMM_WORLD)))
MPIERR(ret);
}
#ifdef HAVE_MPE
/* Log with MPE that we are starting FREE. */
if ((ret = MPE_Log_event(event_num[START][FREE], 0, "start free")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Free the PIO decomposition. */
if (verbose)
printf("rank: %d Freeing PIO decomposition...\n", my_rank);
if ((ret = PIOc_freedecomp(iosysid, ioid)))
ERR(ret);
/* Finalize the IO system. */
if (verbose)
printf("rank: %d Freeing PIO resources...\n", my_rank);
if ((ret = PIOc_finalize(iosysid)))
ERR(ret);
#ifdef HAVE_MPE
/* Log with MPE that we are done with FREE. */
if ((ret = MPE_Log_event(event_num[END][FREE], 0, "end free")))
MPIERR(ret);
/* Log with MPE that we are starting READ. */
if ((ret = MPE_Log_event(event_num[START][READ], 0, "start read")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Check the output file. */
/* if (!my_rank) */
/* for (int fmt = 0; fmt < NUM_NETCDF_FLAVORS; fmt++) */
/* if ((ret = check_file(ntasks, filename[fmt]))) */
/* ERR(ret); */
#ifdef HAVE_MPE
/* Log with MPE that we are done with READ. */
if ((ret = MPE_Log_event(event_num[END][READ], 0, "end read")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* Finalize the MPI library. */
MPI_Finalize();
#ifdef TIMING
/* Finalize the GPTL timing library. */
if ((ret = GPTLfinalize ()))
return ret;
#endif
if (verbose)
printf("rank: %d SUCCESS!\n", my_rank);
return 0;
}
/**
* Test the darray functionality. Create a netCDF file with 3
* dimensions and 3 variable, and use PIOc_write_darray_multi() to
* write one record of data to all three vars at once.
*
* @param iosysid the IO system ID.
* @param ioid the ID of the decomposition.
* @param num_flavors the number of IOTYPES available in this build.
* @param flavor array of available iotypes.
* @param my_rank rank of this task.
* @param pio_type the type of the data.
* @returns 0 for success, error code otherwise.
*/
int test_darray(int iosysid, int ioid, int num_flavors, int *flavor, int my_rank,
int pio_type)
{
#define NUM_TEST_CASES_WRT_MULTI 2
#define NUM_TEST_CASES_FILLVALUE 2
char filename[PIO_MAX_NAME + 1]; /* Name for the output files. */
int dimids[NDIM]; /* The dimension IDs. */
int ncid; /* The ncid of the netCDF file. */
int ncid2; /* The ncid of the re-opened netCDF file. */
int varid[NVAR]; /* The IDs of the netCDF varables. */
int other_varid; /* The IDs of a var of different type. */
int wrong_varid[NVAR]; /* These will not work. */
PIO_Offset arraylen = 4; /* Amount of data from each task. */
void *fillvalue; /* Pointer to fill value. */
void *test_data; /* Pointer to test data we will write. */
void *test_data_in; /* Pointer to buffer we will read into. */
int ret; /* Return code. */
/* Default fill value array for each type. */
signed char byte_fill[NVAR] = {NC_FILL_BYTE, NC_FILL_BYTE, NC_FILL_BYTE};
char char_fill[NVAR] = {NC_FILL_CHAR, NC_FILL_CHAR, NC_FILL_CHAR};
short short_fill[NVAR] = {NC_FILL_SHORT, NC_FILL_SHORT, NC_FILL_SHORT};
int int_fill[NVAR] = {NC_FILL_INT, NC_FILL_INT, NC_FILL_INT};
float float_fill[NVAR] = {NC_FILL_FLOAT, NC_FILL_FLOAT, NC_FILL_FLOAT};
double double_fill[NVAR] = {NC_FILL_DOUBLE, NC_FILL_DOUBLE, NC_FILL_DOUBLE};
#ifdef _NETCDF4
unsigned char ubyte_fill[NVAR] = {NC_FILL_UBYTE, NC_FILL_UBYTE, NC_FILL_UBYTE};
unsigned short ushort_fill[NVAR] = {NC_FILL_USHORT, NC_FILL_USHORT, NC_FILL_USHORT};
unsigned int uint_fill[NVAR] = {NC_FILL_UINT, NC_FILL_UINT, NC_FILL_UINT};
long long int64_fill[NVAR] = {NC_FILL_INT64, NC_FILL_INT64, NC_FILL_INT64};
unsigned long long uint64_fill[NVAR] = {NC_FILL_UINT64, NC_FILL_UINT64, NC_FILL_UINT64};
#endif /* _NETCDF4 */
/* Test data we will write. */
signed char test_data_byte[arraylen * NVAR];
char test_data_char[arraylen * NVAR];
short test_data_short[arraylen * NVAR];
int test_data_int[arraylen * NVAR];
float test_data_float[arraylen * NVAR];
double test_data_double[arraylen * NVAR];
#ifdef _NETCDF4
unsigned char test_data_ubyte[arraylen * NVAR];
unsigned short test_data_ushort[arraylen * NVAR];
unsigned int test_data_uint[arraylen * NVAR];
long long test_data_int64[arraylen * NVAR];
unsigned long long test_data_uint64[arraylen * NVAR];
#endif /* _NETCDF4 */
/* We will read test data into these buffers. */
signed char test_data_byte_in[arraylen];
char test_data_char_in[arraylen];
short test_data_short_in[arraylen];
int test_data_int_in[arraylen];
float test_data_float_in[arraylen];
double test_data_double_in[arraylen];
#ifdef _NETCDF4
unsigned char test_data_ubyte_in[arraylen];
unsigned short test_data_ushort_in[arraylen];
unsigned int test_data_uint_in[arraylen];
long long test_data_int64_in[arraylen];
unsigned long long test_data_uint64_in[arraylen];
#endif /* _NETCDF4 */
/* Initialize a big blob of test data for NVAR vars. */
for (int f = 0; f < arraylen * NVAR; f++)
{
test_data_byte[f] = my_rank * 1 + f;
test_data_char[f] = my_rank * 2 + f;
test_data_short[f] = my_rank * 5 + f;
test_data_int[f] = my_rank * 10 + f;
test_data_float[f] = my_rank * 10 + f + 0.5;
test_data_double[f] = my_rank * 100000 + f + 0.5;
#ifdef _NETCDF4
test_data_ubyte[f] = my_rank * 3 + f;
test_data_ushort[f] = my_rank * 9 + f;
test_data_uint[f] = my_rank * 100 + f;
test_data_int64[f] = my_rank * 10000 + f;
test_data_uint64[f] = my_rank * 100000 + f;
#endif /* _NETCDF4 */
}
/* Use PIO to create the example file in each of the four
* available ways. */
for (int fmt = 0; fmt < num_flavors; fmt++)
{
/* 1-byte types not working with pnetcdf. */
if (flavor[fmt] == PIO_IOTYPE_PNETCDF && (pio_type == PIO_BYTE || pio_type == PIO_CHAR))
continue;
/* NetCDF-4 types only work with netCDF-4. */
if (pio_type > PIO_DOUBLE && (flavor[fmt] != PIO_IOTYPE_NETCDF4C &&
flavor[fmt] != PIO_IOTYPE_NETCDF4P))
continue;
/* Add a couple of extra tests for the
* PIOc_write_darray_multi() function. */
for (int test_multi = 0; test_multi < NUM_TEST_CASES_WRT_MULTI; test_multi++)
{
/* Test with/without providing a fill value to PIOc_write_darray(). */
for (int provide_fill = 0; provide_fill < NUM_TEST_CASES_FILLVALUE; provide_fill++)
{
/* Create the filename. */
sprintf(filename, "data_%s_iotype_%d_pio_type_%d_test_multi_%d_provide_fill_%d.nc", TEST_NAME,
flavor[fmt], pio_type, test_multi, provide_fill);
/* Select the fill value and data. */
switch (pio_type)
{
case PIO_BYTE:
fillvalue = provide_fill ? byte_fill : NULL;
test_data = test_data_byte;
test_data_in = test_data_byte_in;
break;
case PIO_CHAR:
fillvalue = provide_fill ? char_fill : NULL;
test_data = test_data_char;
test_data_in = test_data_char_in;
break;
case PIO_SHORT:
fillvalue = provide_fill ? short_fill : NULL;
test_data = test_data_short;
test_data_in = test_data_short_in;
break;
case PIO_INT:
fillvalue = provide_fill ? int_fill : NULL;
test_data = test_data_int;
test_data_in = test_data_int_in;
break;
case PIO_FLOAT:
fillvalue = provide_fill ? float_fill : NULL;
test_data = test_data_float;
test_data_in = test_data_float_in;
break;
case PIO_DOUBLE:
fillvalue = provide_fill ? double_fill : NULL;
test_data = test_data_double;
test_data_in = test_data_double_in;
break;
#ifdef _NETCDF4
case PIO_UBYTE:
fillvalue = provide_fill ? ubyte_fill : NULL;
test_data = test_data_ubyte;
test_data_in = test_data_ubyte_in;
break;
case PIO_USHORT:
fillvalue = provide_fill ? ushort_fill : NULL;
test_data = test_data_ushort;
test_data_in = test_data_ushort_in;
break;
case PIO_UINT:
fillvalue = provide_fill ? uint_fill : NULL;
test_data = test_data_uint;
test_data_in = test_data_uint_in;
break;
case PIO_INT64:
fillvalue = provide_fill ? int64_fill : NULL;
test_data = test_data_int64;
test_data_in = test_data_int64_in;
break;
case PIO_UINT64:
fillvalue = provide_fill ? uint64_fill : NULL;
test_data = test_data_uint64;
test_data_in = test_data_uint64_in;
break;
#endif /* _NETCDF4 */
default:
ERR(ERR_WRONG);
}
/* Create the netCDF output file. */
if ((ret = PIOc_createfile(iosysid, &ncid, &flavor[fmt], filename, PIO_CLOBBER)))
ERR(ret);
/* Define netCDF dimensions and variable. */
for (int d = 0; d < NDIM; d++)
if ((ret = PIOc_def_dim(ncid, dim_name[d], (PIO_Offset)dim_len[d], &dimids[d])))
ERR(ret);
/* Define a variable. */
for (int v = 0; v < NVAR; v++)
if ((ret = PIOc_def_var(ncid, var_name[v], pio_type, NDIM, dimids, &varid[v])))
ERR(ret);
/* Define a variable of a different type, to test error handling. */
int other_pio_type = pio_type < 5 ? pio_type + 1 : PIO_INT;
if ((ret = PIOc_def_var(ncid, "OTHER_VAR", other_pio_type, NDIM, dimids, &other_varid)))
ERR(ret);
/* Leave a note. */
if ((ret = PIOc_put_att_text(ncid, NC_GLOBAL, NOTE_NAME, strlen(NOTE), NOTE)))
ERR(ret);
int num_stooges = TOTAL_NUMBER_OF_STOOGES;
if ((ret = PIOc_put_att_int(ncid, NC_GLOBAL, TOTAL_NUMBER_OF_STOOGES_NAME, PIO_INT, 1, &num_stooges)))
ERR(ret);
/* End define mode. */
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Set the value of the record dimension. */
if ((ret = PIOc_setframe(ncid, varid[0], 0)))
ERR(ret);
int frame[NVAR] = {0, 0, 0};
int flushtodisk = test_multi;
/* This will not work, because we mix var types. */
wrong_varid[0] = varid[0];
wrong_varid[1] = varid[1];
wrong_varid[0] = other_varid;
// if (PIOc_write_darray_multi(ncid, wrong_varid, ioid, NVAR, arraylen, test_data, frame,
// fillvalue, flushtodisk) != PIO_EINVAL)
// ERR(ERR_WRONG);
/* Write the data with the _multi function. */
if ((ret = PIOc_write_darray_multi(ncid, varid, ioid, NVAR, arraylen, test_data, frame,
fillvalue, flushtodisk)))
ERR(ret);
/* Close the netCDF file. */
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
/* Reopen the file. */
if ((ret = PIOc_openfile(iosysid, &ncid2, &flavor[fmt], filename, PIO_NOWRITE)))
ERR(ret);
/* Now use read_darray on each var in turn and make
* sure we get correct data. */
for (int v = 0; v < NVAR; v++)
{
/* Set the value of the record dimension. */
if ((ret = PIOc_setframe(ncid2, varid[v], 0)))
ERR(ret);
/* Read the data. */
if ((ret = PIOc_read_darray(ncid2, varid[v], ioid, arraylen, test_data_in)))
ERR(ret);
/* Check the results. */
for (int f = 0; f < arraylen; f++)
{
switch (pio_type)
{
case PIO_BYTE:
if (test_data_byte_in[f] != test_data_byte[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_CHAR:
if (test_data_char_in[f] != test_data_char[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_SHORT:
if (test_data_short_in[f] != test_data_short[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_INT:
if (test_data_int_in[f] != test_data_int[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_FLOAT:
if (test_data_float_in[f] != test_data_float[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_DOUBLE:
if (test_data_double_in[f] != test_data_double[f + arraylen * v])
return ERR_WRONG;
break;
#ifdef _NETCDF4
case PIO_UBYTE:
if (test_data_ubyte_in[f] != test_data_ubyte[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_USHORT:
if (test_data_ushort_in[f] != test_data_ushort[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_UINT:
if (test_data_uint_in[f] != test_data_uint[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_INT64:
if (test_data_int64_in[f] != test_data_int64[f + arraylen * v])
return ERR_WRONG;
break;
case PIO_UINT64:
if (test_data_uint64_in[f] != test_data_uint64[f + arraylen * v])
return ERR_WRONG;
break;
#endif /* _NETCDF4 */
default:
ERR(ERR_WRONG);
}
}
}
/* Close the netCDF file. */
if ((ret = PIOc_closefile(ncid2)))
ERR(ret);
} /* next fillvalue test case */
} /* next test multi */
} /* next iotype */
return PIO_NOERR;
}
/** @brief Main execution of code.
Executes the functions to:
- create a new examplePioClass instance
- initialize MPI and the ParallelIO libraries
- create the decomposition for this example
- create the netCDF output file
- define the variable in the file
- write data to the variable in the file using decomposition
- read the data back from the file using decomposition
- close the file
- clean up resources
The example can be run from the command line (on system that support it) like this:
<pre>
mpiexec -n 4 ./examplePio
</pre>
The sample file created by this program is a small netCDF file. It
has the following contents (as shown by ncdump) for a 4-processor
run:
<pre>
netcdf examplePio_c {
dimensions:
x = 16 ;
variables:
int foo(x) ;
data:
foo = 42, 42, 42, 42, 43, 43, 43, 43, 44, 44, 44, 44, 45, 45, 45, 45 ;
}
</pre>
@param [in] argc argument count (should be zero)
@param [in] argv argument array (should be NULL)
@retval examplePioClass* Pointer to self.
*/
int main(int argc, char* argv[])
{
/** Set to non-zero to get output to stdout. */
int verbose = 0;
/** Zero-based rank of processor. */
int my_rank;
/** Number of processors involved in current execution. */
int ntasks;
/** Different output flavors. The example file is written (and
* then read) four times. The first two flavors,
* parallel-netcdf, and netCDF serial, both produce a netCDF
* classic format file (but with different libraries). The
* last two produce netCDF4/HDF5 format files, written with
* and without using netCDF-4 parallel I/O. */
int format[NUM_NETCDF_FLAVORS];
/** Number of processors that will do IO. In this example we
* will do IO from all processors. */
int niotasks;
/** Stride in the mpi rank between io tasks. Always 1 in this
* example. */
int ioproc_stride = 1;
/** Zero based rank of first processor to be used for I/O. */
int ioproc_start = 0;
/** The dimension ID. */
int dimid;
/** Array index per processing unit. This is the number of
* elements of the data array that will be handled by each
* processor. In this example there are 16 data elements. If the
* example is run on 4 processors, then arrIdxPerPe will be 4. */
PIO_Offset elements_per_pe;
/* Length of the dimensions in the data. This simple example
* uses one-dimensional data. The lenght along that dimension
* is DIM_LEN (16). */
int dim_len[1] = {DIM_LEN};
/** The ID for the parallel I/O system. It is set by
* PIOc_Init_Intracomm(). It references an internal structure
* containing the general IO subsystem data and MPI
* structure. It is passed to PIOc_finalize() to free
* associated resources, after all I/O, but before
* MPI_Finalize is called. */
int iosysid;
/** The ncid of the netCDF file created in this example. */
int ncid;
/** The ID of the netCDF varable in the example file. */
int varid;
/** The I/O description ID as passed back by PIOc_InitDecomp()
* and freed in PIOc_freedecomp(). */
int ioid;
/** A buffer for sample data. The size of this array will
* vary depending on how many processors are involved in the
* execution of the example code. It's length will be the same
* as elements_per_pe.*/
int *buffer;
/** A 1-D array which holds the decomposition mapping for this
* example. The size of this array will vary depending on how
* many processors are involved in the execution of the
* example code. It's length will be the same as
* elements_per_pe. */
PIO_Offset *compdof;
/** Test filename. */
char filename[NC_MAX_NAME + 1];
/** The number of netCDF flavors available in this build. */
int num_flavors = 0;
/** Used for command line processing. */
int c;
/** Return value. */
int ret;
/* Parse command line. */
while ((c = getopt(argc, argv, "v")) != -1)
switch (c)
{
case 'v':
verbose++;
break;
default:
break;
}
#ifdef TIMING
/* Initialize the GPTL timing library. */
if ((ret = GPTLinitialize ()))
return ret;
#endif
/* Initialize MPI. */
if ((ret = MPI_Init(&argc, &argv)))
MPIERR(ret);
if ((ret = MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN)))
MPIERR(ret);
/* Learn my rank and the total number of processors. */
if ((ret = MPI_Comm_rank(MPI_COMM_WORLD, &my_rank)))
MPIERR(ret);
if ((ret = MPI_Comm_size(MPI_COMM_WORLD, &ntasks)))
MPIERR(ret);
/* Check that a valid number of processors was specified. */
if (!(ntasks == 1 || ntasks == 2 || ntasks == 4 ||
ntasks == 8 || ntasks == 16))
fprintf(stderr, "Number of processors must be 1, 2, 4, 8, or 16!\n");
if (verbose)
printf("%d: ParallelIO Library example1 running on %d processors.\n",
my_rank, ntasks);
/* keep things simple - 1 iotask per MPI process */
niotasks = ntasks;
/* Turn on logging if available. */
/* PIOc_set_log_level(4); */
/* Change error handling to return errors. */
if ((ret = PIOc_set_iosystem_error_handling(PIO_DEFAULT, PIO_RETURN_ERROR, NULL)))
return ret;
/* Initialize the PIO IO system. This specifies how
* many and which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(MPI_COMM_WORLD, niotasks, ioproc_stride,
ioproc_start, PIO_REARR_SUBSET, &iosysid)))
ERR(ret);
/* Describe the decomposition. This is a 1-based array, so add 1! */
elements_per_pe = DIM_LEN / ntasks;
if (!(compdof = malloc(elements_per_pe * sizeof(PIO_Offset))))
return PIO_ENOMEM;
for (int i = 0; i < elements_per_pe; i++)
compdof[i] = my_rank * elements_per_pe + i + 1;
/* Create the PIO decomposition for this example. */
if (verbose)
printf("rank: %d Creating decomposition...\n", my_rank);
if ((ret = PIOc_InitDecomp(iosysid, PIO_INT, NDIM, dim_len, (PIO_Offset)elements_per_pe,
compdof, &ioid, NULL, NULL, NULL)))
ERR(ret);
free(compdof);
/* The number of favors may change with the build parameters. */
#ifdef _PNETCDF
format[num_flavors++] = PIO_IOTYPE_PNETCDF;
#endif
format[num_flavors++] = PIO_IOTYPE_NETCDF;
#ifdef _NETCDF4
format[num_flavors++] = PIO_IOTYPE_NETCDF4C;
format[num_flavors++] = PIO_IOTYPE_NETCDF4P;
#endif
/* Use PIO to create the example file in each of the four
* available ways. */
for (int fmt = 0; fmt < num_flavors; fmt++)
{
/* Create a filename. */
sprintf(filename, "example1_%d.nc", fmt);
/* Create the netCDF output file. */
if (verbose)
printf("rank: %d Creating sample file %s with format %d...\n",
my_rank, filename, format[fmt]);
if ((ret = PIOc_createfile(iosysid, &ncid, &(format[fmt]), filename,
PIO_CLOBBER)))
ERR(ret);
/* Define netCDF dimension and variable. */
if (verbose)
printf("rank: %d Defining netCDF metadata...\n", my_rank);
if ((ret = PIOc_def_dim(ncid, DIM_NAME, (PIO_Offset)dim_len[0], &dimid)))
ERR(ret);
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_INT, NDIM, &dimid, &varid)))
ERR(ret);
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Prepare sample data. */
if (!(buffer = malloc(elements_per_pe * sizeof(int))))
return PIO_ENOMEM;
for (int i = 0; i < elements_per_pe; i++)
buffer[i] = START_DATA_VAL + my_rank;
/* Write data to the file. */
if (verbose)
printf("rank: %d Writing sample data...\n", my_rank);
if ((ret = PIOc_write_darray(ncid, varid, ioid, (PIO_Offset)elements_per_pe,
buffer, NULL)))
ERR(ret);
if ((ret = PIOc_sync(ncid)))
ERR(ret);
/* Free buffer space used in this example. */
free(buffer);
/* Close the netCDF file. */
if (verbose)
printf("rank: %d Closing the sample data file...\n", my_rank);
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
}
/* Free the PIO decomposition. */
if (verbose)
printf("rank: %d Freeing PIO decomposition...\n", my_rank);
if ((ret = PIOc_freedecomp(iosysid, ioid)))
ERR(ret);
/* Finalize the IO system. */
if (verbose)
printf("rank: %d Freeing PIO resources...\n", my_rank);
if ((ret = PIOc_finalize(iosysid)))
ERR(ret);
/* Check the output file. */
if (!my_rank)
for (int fmt = 0; fmt < num_flavors; fmt++)
{
sprintf(filename, "example1_%d.nc", fmt);
if ((ret = check_file(ntasks, filename)))
ERR(ret);
}
/* Finalize the MPI library. */
MPI_Finalize();
#ifdef TIMING
/* Finalize the GPTL timing library. */
if ((ret = GPTLfinalize ()))
return ret;
#endif
if (verbose)
printf("rank: %d SUCCESS!\n", my_rank);
return 0;
}
/* Run Tests for Init_Intercomm. */
int main(int argc, char **argv)
{
/* Zero-based rank of processor. */
int my_rank;
/* Number of processors involved in current execution. */
int ntasks;
int num_flavors; /* Number of PIO netCDF flavors in this build. */
int flavor[NUM_FLAVORS]; /* iotypes for the supported netCDF IO flavors. */
/* Names for the output files. */
char filename[NUM_FLAVORS][NC_MAX_NAME + 1];
/* The ID for the parallel I/O system. */
int iosysid[COMPONENT_COUNT];
/* Return code. */
int ret;
MPI_Comm test_comm;
char too_long_name[PIO_MAX_NAME * 5 + 1];
/* Create a name that is too long. */
memset(too_long_name, 74, PIO_MAX_NAME * 5);
too_long_name[PIO_MAX_NAME * 5] = 0;
/* Set up test. */
if ((ret = pio_test_init2(argc, argv, &my_rank, &ntasks, TARGET_NTASKS, TARGET_NTASKS,
-1, &test_comm)))
ERR(ERR_INIT);
/* Figure out iotypes. */
if ((ret = get_iotypes(&num_flavors, flavor)))
ERR(ret);
if (my_rank < TARGET_NTASKS)
{
/* How many processors will be used for our IO and 2 computation components. */
int num_procs[COMPONENT_COUNT] = {2};
/* Is the current process a computation task? */
int comp_task = my_rank < 2 ? 0 : 1;
/* Index of computation task in iosysid array. Varies by rank and
* does not apply to IO component processes. */
int my_comp_idx = comp_task ? 0 : -1;
/* Initialize the IO system. */
if ((ret = PIOc_init_async(test_comm, NUM_IO_PROCS, NULL, COMPONENT_COUNT,
num_procs, NULL, NULL, NULL, PIO_REARR_BOX, iosysid)))
ERR(ERR_AWFUL);
/* All the netCDF calls are only executed on the computation
* tasks. The IO tasks have not returned from PIOc_Init_Intercomm,
* and when the do, they should go straight to finalize. */
if (comp_task)
{
for (int fmt = 0; fmt < num_flavors; fmt++)
{
int ncid, varid, dimid;
PIO_Offset start[NDIM], count[NDIM] = {0};
int data[DIM_LEN];
/* Create the filename for this flavor. */
sprintf(filename[fmt], "test_intercomm2_%d.nc", flavor[fmt]);
/* Create a netCDF file with one dimension and one variable. */
if ((ret = PIOc_createfile(iosysid[my_comp_idx], &ncid, &flavor[fmt], filename[fmt],
NC_CLOBBER)))
ERR(ret);
/* End define mode, then re-enter it. */
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
if ((ret = PIOc_redef(ncid)))
ERR(ret);
/* Test the inq_format function. */
int myformat;
if (PIOc_inq_format(ncid + TEST_VAL_42, &myformat) != PIO_EBADID)
ERR(ERR_WRONG);
if ((ret = PIOc_inq_format(ncid, &myformat)))
ERR(ret);
if ((flavor[fmt] == PIO_IOTYPE_PNETCDF || flavor[fmt] == PIO_IOTYPE_NETCDF) &&
myformat != 1)
ERR(ERR_AWFUL);
else if ((flavor[fmt] == PIO_IOTYPE_NETCDF4C || flavor[fmt] == PIO_IOTYPE_NETCDF4P) &&
myformat != 3)
ERR(ERR_AWFUL);
/* Test the inq_type function for atomic types. */
char type_name[NC_MAX_NAME + 1];
PIO_Offset type_size;
nc_type xtype[NUM_TYPES] = {NC_CHAR, NC_BYTE, NC_SHORT, NC_INT, NC_FLOAT, NC_DOUBLE,
NC_UBYTE, NC_USHORT, NC_UINT, NC_INT64, NC_UINT64};
int type_len[NUM_TYPES] = {1, 1, 2, 4, 4, 8, 1, 2, 4, 8, 8};
int max_type = flavor[fmt] == PIO_IOTYPE_NETCDF ? NC_DOUBLE : NC_UINT64;
/* This should not work. */
if (PIOc_inq_type(ncid + TEST_VAL_42, xtype[0], type_name, &type_size) != PIO_EBADID)
ERR(ERR_WRONG);
/* These should work. */
for (int i = 0; i < max_type; i++)
{
if ((ret = PIOc_inq_type(ncid, xtype[i], type_name, &type_size)))
ERR(ret);
if (type_size != type_len[i])
ERR(ERR_AWFUL);
}
/* Define a dimension. */
char dimname2[NC_MAX_NAME + 1];
if ((ret = PIOc_def_dim(ncid, FIRST_DIM_NAME, DIM_LEN, &dimid)))
ERR(ret);
if ((ret = PIOc_inq_dimname(ncid, 0, dimname2)))
ERR(ret);
if (strcmp(dimname2, FIRST_DIM_NAME))
ERR(ERR_WRONG);
if ((ret = PIOc_rename_dim(ncid, 0, DIM_NAME)))
ERR(ret);
/* These should not work. */
if (PIOc_rename_dim(ncid + TEST_VAL_42, 0, DIM_NAME) != PIO_EBADID)
ERR(ERR_WRONG);
if (PIOc_rename_dim(ncid, 0, NULL) != PIO_EINVAL)
ERR(ERR_WRONG);
if (PIOc_rename_dim(ncid, 0, too_long_name) != PIO_EINVAL)
ERR(ERR_WRONG);
/* Define a 1-D variable. */
char varname2[NC_MAX_NAME + 1];
if ((ret = PIOc_def_var(ncid, FIRST_VAR_NAME, NC_INT, NDIM, &dimid, &varid)))
ERR(ret);
if ((ret = PIOc_inq_varname(ncid, 0, varname2)))
ERR(ret);
if (strcmp(varname2, FIRST_VAR_NAME))
ERR(ERR_WRONG);
if ((ret = PIOc_rename_var(ncid, 0, VAR_NAME)))
ERR(ret);
/* These should not work. */
if (PIOc_rename_var(ncid + TEST_VAL_42, 0, VAR_NAME) != PIO_EBADID)
ERR(ERR_WRONG);
if (PIOc_rename_var(ncid, 0, NULL) != PIO_EINVAL)
ERR(ERR_WRONG);
if (PIOc_rename_var(ncid, 0, too_long_name) != PIO_EINVAL)
ERR(ERR_WRONG);
/* Add a global attribute. */
int att_data = ATT_VALUE;
short short_att_data = ATT_VALUE;
float float_att_data = ATT_VALUE;
double double_att_data = ATT_VALUE;
char attname2[NC_MAX_NAME + 1];
/* Write an att and rename it. */
if ((ret = PIOc_put_att_int(ncid, NC_GLOBAL, FIRST_ATT_NAME, NC_INT, 1, &att_data)))
ERR(ret);
if ((ret = PIOc_inq_attname(ncid, NC_GLOBAL, 0, attname2)))
ERR(ret);
if (strcmp(attname2, FIRST_ATT_NAME))
ERR(ERR_WRONG);
if ((ret = PIOc_rename_att(ncid, NC_GLOBAL, FIRST_ATT_NAME, ATT_NAME)))
ERR(ret);
/* These should not work. */
if (PIOc_inq_attname(ncid + TEST_VAL_42, NC_GLOBAL, 0, attname2) != PIO_EBADID)
ERR(ERR_WRONG);
if (PIOc_rename_att(ncid + TEST_VAL_42, NC_GLOBAL, FIRST_ATT_NAME, ATT_NAME) != PIO_EBADID)
ERR(ERR_WRONG);
if (PIOc_rename_att(ncid, NC_GLOBAL, FIRST_ATT_NAME, NULL) != PIO_EINVAL)
ERR(ERR_WRONG);
if (PIOc_rename_att(ncid, NC_GLOBAL, FIRST_ATT_NAME, too_long_name) != PIO_EINVAL)
ERR(ERR_WRONG);
if (PIOc_del_att(ncid + TEST_VAL_42, NC_GLOBAL, FIRST_ATT_NAME) != PIO_EBADID)
ERR(ERR_WRONG);
if (PIOc_del_att(ncid, NC_GLOBAL, NULL) != PIO_EINVAL)
ERR(ERR_WRONG);
if (PIOc_del_att(ncid, NC_GLOBAL, too_long_name) != PIO_EINVAL)
ERR(ERR_WRONG);
/* Write an att and delete it. */
if ((ret = PIOc_put_att_int(ncid, NC_GLOBAL, FIRST_ATT_NAME, NC_INT, 1, &att_data)))
ERR(ret);
if ((ret = PIOc_del_att(ncid, NC_GLOBAL, FIRST_ATT_NAME)))
ERR(ret);
/* if ((ret = PIOc_inq_att(ncid, NC_GLOBAL, FIRST_ATT_NAME, NULL, NULL)) != PIO_ENOTATT) */
/* { */
/* printf("ret = %d\n", ret); */
/* ERR(ERR_AWFUL); */
/* } */
/* Write some atts of different types. */
if ((ret = PIOc_put_att_short(ncid, NC_GLOBAL, SHORT_ATT_NAME, NC_SHORT, 1, &short_att_data)))
ERR(ret);
if ((ret = PIOc_put_att_float(ncid, NC_GLOBAL, FLOAT_ATT_NAME, NC_FLOAT, 1, &float_att_data)))
ERR(ret);
if ((ret = PIOc_put_att_double(ncid, NC_GLOBAL, DOUBLE_ATT_NAME, NC_DOUBLE, 1, &double_att_data)))
ERR(ret);
/* Check some att types. */
nc_type myatttype;
if ((ret = PIOc_inq_atttype(ncid, NC_GLOBAL, SHORT_ATT_NAME, &myatttype)))
ERR(ret);
if (myatttype != NC_SHORT)
ERR(ERR_WRONG);
if ((ret = PIOc_inq_atttype(ncid, NC_GLOBAL, FLOAT_ATT_NAME, &myatttype)))
ERR(ret);
if (myatttype != NC_FLOAT)
ERR(ERR_WRONG);
if ((ret = PIOc_inq_atttype(ncid, NC_GLOBAL, DOUBLE_ATT_NAME, &myatttype)))
ERR(ret);
if (myatttype != NC_DOUBLE)
ERR(ERR_WRONG);
/* End define mode. */
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Write some data. For the PIOc_put/get functions, all
* data must be on compmaster before the function is
* called. Only compmaster's arguments are passed to the
* async msg handler. All other computation tasks are
* ignored. */
for (int i = 0; i < DIM_LEN; i++)
data[i] = i;
start[0] = 0;
count[0] = DIM_LEN;
if ((ret = PIOc_put_vars_tc(ncid, varid, start, count, NULL, NC_INT, data)))
ERR(ret);
/* Close the file. */
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
/* Check the file for correctness. */
if ((ret = check_file(iosysid[my_comp_idx], flavor[fmt], filename[fmt], my_rank)))
ERR(ret);
/* Now delete the file. */
/* if ((ret = PIOc_deletefile(iosysid, filename[fmt]))) */
/* ERR(ret); */
/* if ((ret = PIOc_openfile(iosysid, &ncid, &flavor[fmt], filename[fmt], */
/* NC_NOWRITE)) != PIO_ENFILE) */
/* ERR(ERR_AWFUL); */
} /* next netcdf flavor */
/* Finalize the IO system. Only call this from the computation tasks. */
if ((ret = PIOc_finalize(iosysid[my_comp_idx])))
ERR(ret);
}
} /* my_rank < TARGET_NTASKS */
/* Finalize test. */
if ((ret = pio_test_finalize(&test_comm)))
return ERR_AWFUL;
printf("%d %s SUCCESS!!\n", my_rank, TEST_NAME);
return 0;
}
/** Run Tests for NetCDF-4 Functions.
*
* @param argc argument count
* @param argv array of arguments
*/
int
main(int argc, char **argv)
{
int verbose = 1;
/** Zero-based rank of processor. */
int my_rank;
/** Number of processors involved in current execution. */
int ntasks;
/** Specifies the flavor of netCDF output format. */
int iotype;
/** Different output flavors. */
int format[NUM_NETCDF_FLAVORS] = {PIO_IOTYPE_PNETCDF,
PIO_IOTYPE_NETCDF,
PIO_IOTYPE_NETCDF4C,
PIO_IOTYPE_NETCDF4P};
/** Names for the output files. */
char filename[NUM_NETCDF_FLAVORS][NC_MAX_NAME + 1] = {"test_nc4_pnetcdf.nc",
"test_nc4_classic.nc",
"test_nc4_serial4.nc",
"test_nc4_parallel4.nc"};
/** Number of processors that will do IO. In this test we
* will do IO from all processors. */
int niotasks;
/** Stride in the mpi rank between io tasks. Always 1 in this
* test. */
int ioproc_stride = 1;
/** Number of the aggregator? Always 0 in this test. */
int numAggregator = 0;
/** Zero based rank of first processor to be used for I/O. */
int ioproc_start = 0;
/** The dimension IDs. */
int dimids[NDIM];
/** Array index per processing unit. */
PIO_Offset elements_per_pe;
/** The ID for the parallel I/O system. */
int iosysid;
/** The ncid of the netCDF file. */
int ncid = 0;
/** The ID of the netCDF varable. */
int varid;
/** Storage of netCDF-4 files (contiguous vs. chunked). */
int storage;
/** Chunksizes set in the file. */
PIO_Offset my_chunksize[NDIM];
/** The shuffle filter setting in the netCDF-4 test file. */
int shuffle;
/** Non-zero if deflate set for the variable in the netCDF-4 test file. */
int deflate;
/** The deflate level set for the variable in the netCDF-4 test file. */
int deflate_level;
/** Endianness of variable. */
int endianness;
/* Size of the var chunk cache. */
PIO_Offset var_cache_size;
/* Number of elements in var cache. */
PIO_Offset var_cache_nelems;
/* Var cache preemption. */
float var_cache_preemption;
/** The I/O description ID. */
int ioid;
/** A buffer for sample data. */
float *buffer;
/** A buffer for reading data back from the file. */
int *read_buffer;
/** The decomposition mapping. */
PIO_Offset *compdof;
/** Return code. */
int ret;
/** Index for loops. */
int fmt, d, d1, i;
/** For setting the chunk cache. */
PIO_Offset chunk_cache_size = 1024*1024;
PIO_Offset chunk_cache_nelems = 1024;
float chunk_cache_preemption = 0.5;
/* For reading the chunk cache. */
PIO_Offset chunk_cache_size_in;
PIO_Offset chunk_cache_nelems_in;
float chunk_cache_preemption_in;
char varname[15];
#ifdef TIMING
/* Initialize the GPTL timing library. */
if ((ret = GPTLinitialize ()))
return ret;
#endif
/* Initialize MPI. */
if ((ret = MPI_Init(&argc, &argv)))
MPIERR(ret);
/* Learn my rank and the total number of processors. */
if ((ret = MPI_Comm_rank(MPI_COMM_WORLD, &my_rank)))
MPIERR(ret);
if ((ret = MPI_Comm_size(MPI_COMM_WORLD, &ntasks)))
MPIERR(ret);
/* Check that a valid number of processors was specified. */
if (!(ntasks == 1 || ntasks == 2 || ntasks == 4 ||
ntasks == 8 || ntasks == 16))
fprintf(stderr, "Number of processors must be 1, 2, 4, 8, or 16!\n");
if (verbose)
printf("%d: ParallelIO Library test_nc4 running on %d processors.\n",
my_rank, ntasks);
/* keep things simple - 1 iotask per MPI process */
niotasks = ntasks;
/* Initialize the PIO IO system. This specifies how
* many and which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(MPI_COMM_WORLD, niotasks, ioproc_stride,
ioproc_start, PIO_REARR_SUBSET, &iosysid)))
ERR(ret);
/* Describe the decomposition. This is a 1-based array, so add 1! */
elements_per_pe = X_DIM_LEN * Y_DIM_LEN / ntasks;
if (!(compdof = malloc(elements_per_pe * sizeof(PIO_Offset))))
return PIO_ENOMEM;
for (i = 0; i < elements_per_pe; i++) {
compdof[i] = my_rank * elements_per_pe + i + 1;
}
/* Create the PIO decomposition for this test. */
if (verbose)
printf("rank: %d Creating decomposition...\n", my_rank);
if ((ret = PIOc_InitDecomp(iosysid, PIO_FLOAT, 2, &dim_len[1], (PIO_Offset)elements_per_pe,
compdof, &ioid, NULL, NULL, NULL)))
ERR(ret);
free(compdof);
#ifdef HAVE_MPE
/* Log with MPE that we are done with INIT. */
if ((ret = MPE_Log_event(event_num[END][INIT], 0, "end init")))
MPIERR(ret);
#endif /* HAVE_MPE */
/* How many flavors will we be running for? */
int num_flavors = 0;
int fmtidx = 0;
#ifdef _PNETCDF
num_flavors++;
format[fmtidx++] = PIO_IOTYPE_PNETCDF;
#endif
#ifdef _NETCDF
num_flavors++;
format[fmtidx++] = PIO_IOTYPE_NETCDF;
#endif
#ifdef _NETCDF4
num_flavors += 2;
format[fmtidx++] = PIO_IOTYPE_NETCDF4C;
format[fmtidx] = PIO_IOTYPE_NETCDF4P;
#endif
/* Use PIO to create the example file in each of the four
* available ways. */
for (fmt = 0; fmt < num_flavors; fmt++)
{
#ifdef HAVE_MPE
/* Log with MPE that we are starting CREATE. */
if ((ret = MPE_Log_event(event_num[START][CREATE_PNETCDF+fmt], 0, "start create")))
MPIERR(ret);
#endif /* HAVE_MPE */
if (verbose)
printf("rank: %d Setting chunk cache for file %s with format %d...\n",
my_rank, filename[fmt], format[fmt]);
/* Try to set the chunk cache with invalid preemption to check error handling. */
chunk_cache_preemption = 50.0;
ret = PIOc_set_chunk_cache(iosysid, format[fmt], chunk_cache_size,
chunk_cache_nelems, chunk_cache_preemption);
if (format[fmt] == PIO_IOTYPE_NETCDF4C || format[fmt] == PIO_IOTYPE_NETCDF4P)
{
if (ret != NC_EINVAL)
ERR(ERR_AWFUL);
}
else
{
if (ret != NC_ENOTNC4)
ERR(ERR_AWFUL);
}
/* Try to set the chunk cache. */
chunk_cache_preemption = 0.5;
ret = PIOc_set_chunk_cache(iosysid, format[fmt], chunk_cache_size,
chunk_cache_nelems, chunk_cache_preemption);
/* Should only have worked for netCDF-4 iotypes. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C || format[fmt] == PIO_IOTYPE_NETCDF4P)
{
if (ret != PIO_NOERR)
ERR(ret);
}
else
{
if (ret != PIO_ENOTNC4)
ERR(ERR_AWFUL);
}
/* Now check the chunk cache. */
ret = PIOc_get_chunk_cache(iosysid, format[fmt], &chunk_cache_size_in,
&chunk_cache_nelems_in, &chunk_cache_preemption_in);
/* Should only have worked for netCDF-4 iotypes. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C || format[fmt] == PIO_IOTYPE_NETCDF4P)
{
/* Check that there was no error. */
if (ret != PIO_NOERR)
ERR(ret);
/* Check that we got the correct values. */
if (chunk_cache_size_in != chunk_cache_size || chunk_cache_nelems_in != chunk_cache_nelems ||
chunk_cache_preemption_in != chunk_cache_preemption)
ERR(ERR_AWFUL);
}
else
{
if (ret != PIO_ENOTNC4)
ERR(ERR_AWFUL);
}
/* Create the netCDF output file. */
if (verbose)
printf("rank: %d Creating sample file %s with format %d...\n",
my_rank, filename[fmt], format[fmt]);
if ((ret = PIOc_createfile(iosysid, &ncid, &(format[fmt]), filename[fmt],
PIO_CLOBBER)))
ERR(ret);
/* Set error handling. */
PIOc_Set_File_Error_Handling(ncid, PIO_BCAST_ERROR);
/* Define netCDF dimensions and variable. */
if (verbose)
printf("rank: %d Defining netCDF metadata...\n", my_rank);
for (d = 0; d < NDIM; d++) {
if (verbose)
printf("rank: %d Defining netCDF dimension %s, length %d\n", my_rank,
dim_name[d], dim_len[d]);
if ((ret = PIOc_def_dim(ncid, dim_name[d], (PIO_Offset)dim_len[d], &dimids[d])))
ERR(ret);
}
if (verbose)
printf("rank: %d Defining netCDF variable %s, ndims %d\n", my_rank, VAR_NAME, NDIM);
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_FLOAT, NDIM, dimids, &varid)))
ERR(ret);
/* For netCDF-4 files, set the chunksize to improve performance. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C || format[fmt] == PIO_IOTYPE_NETCDF4P)
{
if (verbose)
printf("rank: %d Defining chunksizes\n", my_rank);
if ((ret = PIOc_def_var_chunking(ncid, 0, NC_CHUNKED, chunksize)))
ERR(ret);
/** Check that the inq_varname function works. */
if (verbose)
printf("rank: %d Checking varname\n", my_rank);
ret = PIOc_inq_varname(ncid, 0, varname);
printf("rank: %d ret: %d varname: %s\n", my_rank, ret, varname);
/** Check that the inq_var_chunking function works. */
if (verbose)
printf("rank: %d Checking chunksizes\n");
if ((ret = PIOc_inq_var_chunking(ncid, 0, &storage, my_chunksize)))
ERR(ret);
if (verbose)
{
printf("rank: %d ret: %d storage: %d\n", my_rank, ret, storage);
for (d1 = 0; d1 < NDIM; d1++)
{
printf("chunksize[%d]=%d\n", d1, my_chunksize[d1]);
}
}
/** Check the answers. */
if (format[fmt] == PIO_IOTYPE_NETCDF4C ||
format[fmt] == PIO_IOTYPE_NETCDF4P)
{
if (storage != NC_CHUNKED)
ERR(ERR_AWFUL);
for (d1 = 0; d1 < NDIM; d1++)
if (my_chunksize[d1] != chunksize[d1])
ERR(ERR_AWFUL);
}
/* Check that the inq_var_deflate functions works. */
if ((ret = PIOc_inq_var_deflate(ncid, 0, &shuffle, &deflate, &deflate_level)))
ERR(ret);
/** For serial netCDF-4 deflate is turned on by default */
if (format[fmt] == PIO_IOTYPE_NETCDF4C)
if (shuffle || !deflate || deflate_level != 1)
ERR(ERR_AWFUL);
/* For parallel netCDF-4, no compression available. :-( */
if (format[fmt] == PIO_IOTYPE_NETCDF4P)
if (shuffle || deflate)
ERR(ERR_AWFUL);
/* Check setting the chunk cache for the variable. */
printf("rank: %d PIOc_set_var_chunk_cache...\n", my_rank);
if ((ret = PIOc_set_var_chunk_cache(ncid, 0, VAR_CACHE_SIZE, VAR_CACHE_NELEMS,
VAR_CACHE_PREEMPTION)))
ERR(ret);
/* Check getting the chunk cache values for the variable. */
printf("rank: %d PIOc_get_var_chunk_cache...\n", my_rank);
if ((ret = PIOc_get_var_chunk_cache(ncid, 0, &var_cache_size, &var_cache_nelems,
&var_cache_preemption)))
ERR(ret);
PIO_Offset len;
if ((ret = PIOc_inq_dimlen(ncid, 0, &len)))
ERR(ret);
/* Check that we got expected values. */
printf("rank: %d var_cache_size = %d\n", my_rank, var_cache_size);
if (var_cache_size != VAR_CACHE_SIZE)
ERR(ERR_AWFUL);
if (var_cache_nelems != VAR_CACHE_NELEMS)
ERR(ERR_AWFUL);
if (var_cache_preemption != VAR_CACHE_PREEMPTION)
ERR(ERR_AWFUL);
} else {
/* Trying to set or inq netCDF-4 settings for non-netCDF-4
* files results in the PIO_ENOTNC4 error. */
if ((ret = PIOc_def_var_chunking(ncid, 0, NC_CHUNKED, chunksize)) != PIO_ENOTNC4)
ERR(ERR_AWFUL);
if ((ret = PIOc_inq_var_chunking(ncid, 0, &storage, my_chunksize)) != PIO_ENOTNC4)
ERR(ERR_AWFUL);
if ((ret = PIOc_inq_var_deflate(ncid, 0, &shuffle, &deflate, &deflate_level))
!= PIO_ENOTNC4)
ERR(ret);
if ((ret = PIOc_def_var_endian(ncid, 0, 1)) != PIO_ENOTNC4)
ERR(ret);
if ((ret = PIOc_inq_var_endian(ncid, 0, &endianness)) != PIO_ENOTNC4)
ERR(ret);
if ((ret = PIOc_set_var_chunk_cache(ncid, 0, VAR_CACHE_SIZE, VAR_CACHE_NELEMS,
VAR_CACHE_PREEMPTION)) != PIO_ENOTNC4)
ERR(ret);
if ((ret = PIOc_get_var_chunk_cache(ncid, 0, &var_cache_size, &var_cache_nelems,
&var_cache_preemption)) != PIO_ENOTNC4)
ERR(ret);
if ((ret = PIOc_set_chunk_cache(iosysid, format[fmt], chunk_cache_size, chunk_cache_nelems,
chunk_cache_preemption)) != PIO_ENOTNC4)
ERR(ret);
if ((ret = PIOc_get_chunk_cache(iosysid, format[fmt], &chunk_cache_size,
&chunk_cache_nelems, &chunk_cache_preemption)) != PIO_ENOTNC4)
ERR(ret);
}
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Close the netCDF file. */
if (verbose)
printf("rank: %d Closing the sample data file...\n", my_rank);
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
}
/* Free the PIO decomposition. */
if (verbose)
printf("rank: %d Freeing PIO decomposition...\n", my_rank);
if ((ret = PIOc_freedecomp(iosysid, ioid)))
ERR(ret);
/* Finalize the IO system. */
if (verbose)
printf("rank: %d Freeing PIO resources...\n", my_rank);
if ((ret = PIOc_finalize(iosysid)))
ERR(ret);
/* Finalize the MPI library. */
MPI_Finalize();
#ifdef TIMING
/* Finalize the GPTL timing library. */
if ((ret = GPTLfinalize ()))
return ret;
#endif
return 0;
}
/* Run tests for darray functions. */
int main(int argc, char **argv)
{
int my_rank;
int ntasks;
int num_flavors; /* Number of PIO netCDF flavors in this build. */
int flavor[NUM_FLAVORS]; /* iotypes for the supported netCDF IO flavors. */
MPI_Comm test_comm; /* A communicator for this test. */
int ret; /* Return code. */
/* Initialize test. */
if ((ret = pio_test_init2(argc, argv, &my_rank, &ntasks, MIN_NTASKS,
MIN_NTASKS, -1, &test_comm)))
ERR(ERR_INIT);
if ((ret = PIOc_set_iosystem_error_handling(PIO_DEFAULT, PIO_RETURN_ERROR, NULL)))
return ret;
/* Only do something on max_ntasks tasks. */
if (my_rank < TARGET_NTASKS)
{
int iosysid; /* The ID for the parallel I/O system. */
int ioproc_stride = 1; /* Stride in the mpi rank between io tasks. */
int ioproc_start = 0; /* Zero based rank of first processor to be used for I/O. */
int wioid, rioid;
int maplen = MAPLEN;
MPI_Offset wcompmap[MAPLEN];
MPI_Offset rcompmap[MAPLEN];
int rearranger[NUM_REARRANGERS_TO_TEST] = {PIO_REARR_BOX, PIO_REARR_SUBSET};
/* Data we will write for each type. */
signed char byte_data[MAPLEN];
char char_data[MAPLEN];
short short_data[MAPLEN];
int int_data[MAPLEN];
float float_data[MAPLEN];
double double_data[MAPLEN];
#ifdef _NETCDF4
unsigned char ubyte_data[MAPLEN];
unsigned short ushort_data[MAPLEN];
unsigned int uint_data[MAPLEN];
long long int64_data[MAPLEN];
unsigned long long uint64_data[MAPLEN];
#endif /* _NETCDF4 */
/* Expected results for each type. */
signed char byte_expected[MAPLEN];
char char_expected[MAPLEN];
short short_expected[MAPLEN];
int int_expected[MAPLEN];
float float_expected[MAPLEN];
double double_expected[MAPLEN];
#ifdef _NETCDF4
unsigned char ubyte_expected[MAPLEN];
unsigned short ushort_expected[MAPLEN];
unsigned int uint_expected[MAPLEN];
long long int64_expected[MAPLEN];
unsigned long long uint64_expected[MAPLEN];
#endif /* _NETCDF4 */
/* Custom fill value for each type. */
signed char byte_fill = -2;
char char_fill = 2;
short short_fill = -2;
int int_fill = -2;
float float_fill = -2;
double double_fill = -2;
#ifdef _NETCDF4
unsigned char ubyte_fill = 2;
unsigned short ushort_fill = 2;
unsigned int uint_fill = 2;
long long int64_fill = 2;
unsigned long long uint64_fill = 2;
#endif /* _NETCDF4 */
/* Default fill value for each type. */
signed char byte_default_fill = NC_FILL_BYTE;
char char_default_fill = NC_FILL_CHAR;
short short_default_fill = NC_FILL_SHORT;
int int_default_fill = NC_FILL_INT;
float float_default_fill = NC_FILL_FLOAT;
double double_default_fill = NC_FILL_DOUBLE;
#ifdef _NETCDF4
unsigned char ubyte_default_fill = NC_FILL_UBYTE;
unsigned short ushort_default_fill = NC_FILL_USHORT;
unsigned int uint_default_fill = NC_FILL_UINT;
long long int64_default_fill = NC_FILL_INT64;
unsigned long long uint64_default_fill = NC_FILL_UINT64;
#endif /* _NETCDF4 */
int ret; /* Return code. */
/* Set up the compmaps. Don't forget these are 1-based
* numbers, like in Fortran! */
for (int i = 0; i < MAPLEN; i++)
{
wcompmap[i] = i % 2 ? my_rank * MAPLEN + i + 1 : 0; /* Even values missing. */
rcompmap[i] = my_rank * MAPLEN + i + 1;
}
/* Figure out iotypes. */
if ((ret = get_iotypes(&num_flavors, flavor)))
ERR(ret);
/* Test for each rearranger. */
for (int r = 0; r < NUM_REARRANGERS_TO_TEST; r++)
{
/* Initialize the PIO IO system. This specifies how
* many and which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(test_comm, NUM_IO_PROCS, ioproc_stride, ioproc_start,
rearranger[r], &iosysid)))
return ret;
/* Test with and without custom fill values. */
for (int fv = 0; fv < NUM_TEST_CASES_FILLVALUE; fv++)
{
#ifndef _NETCDF4
#define NUM_TYPES 6
int test_type[NUM_TYPES] = {PIO_BYTE, PIO_CHAR, PIO_SHORT, PIO_INT, PIO_FLOAT, PIO_DOUBLE};
#else
#define NUM_TYPES 11
int test_type[NUM_TYPES] = {PIO_BYTE, PIO_CHAR, PIO_SHORT, PIO_INT, PIO_FLOAT, PIO_DOUBLE,
PIO_UBYTE, PIO_USHORT, PIO_UINT, PIO_INT64, PIO_UINT64};
#endif /* _NETCDF4 */
/* Determine what data to write. Put value of 42 into
* array elements that will not get written. Due to
* the decomposition, these will be replaced by fill
* values. */
for (int i = 0; i < MAPLEN; i++)
{
byte_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
char_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
short_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
int_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
float_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
double_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
#ifdef _NETCDF4
ubyte_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
ushort_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
uint_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
int64_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
uint64_data[i] = i % 2 ? my_rank * MAPLEN + i + 1 : TEST_VAL_42;
#endif /* _NETCDF4 */
}
/* Determine what data to expect from the test. For
* even values of i, the fill value will be used, and
* it may be custom or default fill value. */
for (int i = 0; i < MAPLEN; i++)
{
byte_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? byte_default_fill : byte_fill);
char_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? char_default_fill : char_fill);
short_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? short_default_fill : short_fill);
int_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? int_default_fill : int_fill);
float_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? float_default_fill : float_fill);
double_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? double_default_fill : double_fill);
#ifdef _NETCDF4
ubyte_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? ubyte_default_fill : ubyte_fill);
ushort_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? ushort_default_fill : ushort_fill);
uint_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? uint_default_fill : uint_fill);
int64_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? int64_default_fill : int64_fill);
uint64_expected[i] = i % 2 ? my_rank * MAPLEN + i + 1 : (fv ? uint64_default_fill : uint64_fill);
#endif /* _NETCDF4 */
}
/* Test for each available type. */
for (int t = 0; t < NUM_TYPES; t++)
{
void *expected;
void *fill;
void *data;
int ncid, dimid, varid;
char filename[NC_MAX_NAME + 1];
switch (test_type[t])
{
case PIO_BYTE:
expected = byte_expected;
fill = fv ? &byte_default_fill : &byte_fill;
data = byte_data;
break;
case PIO_CHAR:
expected = char_expected;
fill = fv ? &char_default_fill : &char_fill;
data = char_data;
break;
case PIO_SHORT:
expected = short_expected;
fill = fv ? &short_default_fill : &short_fill;
data = short_data;
break;
case PIO_INT:
expected = int_expected;
fill = fv ? &int_default_fill : &int_fill;
data = int_data;
break;
case PIO_FLOAT:
expected = float_expected;
fill = fv ? &float_default_fill : &float_fill;
data = float_data;
break;
case PIO_DOUBLE:
expected = double_expected;
fill = fv ? &double_default_fill : &double_fill;
data = double_data;
break;
#ifdef _NETCDF4
case PIO_UBYTE:
expected = ubyte_expected;
fill = fv ? &ubyte_default_fill : &ubyte_fill;
data = ubyte_data;
break;
case PIO_USHORT:
expected = ushort_expected;
fill = fv ? &ushort_default_fill : &ushort_fill;
data = ushort_data;
break;
case PIO_UINT:
expected = uint_expected;
fill = fv ? &uint_default_fill : &uint_fill;
data = uint_data;
break;
case PIO_INT64:
expected = int64_expected;
fill = fv ? &int64_default_fill : &int64_fill;
data = int64_data;
break;
case PIO_UINT64:
expected = uint64_expected;
fill = fv ? &uint64_default_fill : &uint64_fill;
data = uint64_data;
break;
#endif /* _NETCDF4 */
default:
return ERR_AWFUL;
}
/* Initialize decompositions. */
if ((ret = PIOc_InitDecomp(iosysid, test_type[t], NDIM1, dim_len, maplen, wcompmap,
&wioid, &rearranger[r], NULL, NULL)))
return ret;
if ((ret = PIOc_InitDecomp(iosysid, test_type[t], NDIM1, dim_len, maplen, rcompmap,
&rioid, &rearranger[r], NULL, NULL)))
return ret;
/* Create the test file in each of the available iotypes. */
for (int fmt = 0; fmt < num_flavors; fmt++)
{
PIO_Offset type_size;
void *data_in;
/* Byte type doesn't work with pnetcdf. */
if (flavor[fmt] == PIO_IOTYPE_PNETCDF && (test_type[t] == PIO_BYTE || test_type[t] == PIO_CHAR))
continue;
/* NetCDF-4 types only work with netCDF-4 formats. */
if (test_type[t] > PIO_DOUBLE && flavor[fmt] != PIO_IOTYPE_NETCDF4C &&
flavor[fmt] != PIO_IOTYPE_NETCDF4P)
continue;
/* Put together filename. */
sprintf(filename, "%s_iotype_%d_rearr_%d_type_%d.nc", TEST_NAME, flavor[fmt],
rearranger[r], test_type[t]);
/* Create file. */
if ((ret = PIOc_createfile(iosysid, &ncid, &flavor[fmt], filename, NC_CLOBBER)))
return ret;
/* Define metadata. */
if ((ret = PIOc_def_dim(ncid, DIM_NAME, dim_len[0], &dimid)))
return ret;
if ((ret = PIOc_def_var(ncid, VAR_NAME, test_type[t], NDIM1, &dimid, &varid)))
return ret;
if ((ret = PIOc_put_att(ncid, varid, FILL_VALUE_NAME, test_type[t],
1, fill)))
return ret;
if ((ret = PIOc_enddef(ncid)))
return ret;
/* Write some data. */
if ((ret = PIOc_write_darray(ncid, varid, wioid, MAPLEN, data, fill)))
return ret;
if ((ret = PIOc_sync(ncid)))
return ret;
/* What is size of type? */
if ((ret = PIOc_inq_type(ncid, test_type[t], NULL, &type_size)))
return ret;
/* Allocate space to read data into. */
if (!(data_in = malloc(type_size * MAPLEN)))
return PIO_ENOMEM;
/* Read the data. */
if ((ret = PIOc_read_darray(ncid, varid, rioid, MAPLEN, data_in)))
return ret;
/* Check results. */
if (memcmp(data_in, expected, type_size * MAPLEN))
return ERR_AWFUL;
/* Release storage. */
free(data_in);
/* Close file. */
if ((ret = PIOc_closefile(ncid)))
return ret;
} /* next iotype */
/* Free decompositions. */
if ((ret = PIOc_freedecomp(iosysid, wioid)))
return ret;
if ((ret = PIOc_freedecomp(iosysid, rioid)))
return ret;
} /* next type */
} /* next fill value test case */
} /* next rearranger */
/* Finalize PIO system. */
if ((ret = PIOc_finalize(iosysid)))
return ret;
} /* endif my_rank < TARGET_NTASKS */
/* Finalize the MPI library. */
if ((ret = pio_test_finalize(&test_comm)))
return ret;
printf("%d %s SUCCESS!!\n", my_rank, TEST_NAME);
return 0;
}
/* Write, then read, a simple example with darrays.
The sample file created by this program is a small netCDF file. It
has the following contents (as shown by ncdump):
<pre>
netcdf darray_no_async_iotype_1 {
dimensions:
unlimted = UNLIMITED ; // (2 currently)
x = 4 ;
y = 4 ;
variables:
int foo(unlimted, x, y) ;
data:
foo =
42, 42, 42, 42,
43, 43, 43, 43,
44, 44, 44, 44,
45, 45, 45, 45,
142, 142, 142, 142,
143, 143, 143, 143,
144, 144, 144, 144,
145, 145, 145, 145 ;
}
</pre>
*/
int main(int argc, char* argv[])
{
int my_rank; /* Zero-based rank of processor. */
int ntasks; /* Number of processors involved in current execution. */
int ioproc_stride = 1; /* Stride in the mpi rank between io tasks. */
int ioproc_start = 0; /* Rank of first task to be used for I/O. */
PIO_Offset elements_per_pe; /* Array elements per processing unit. */
int iosysid; /* The ID for the parallel I/O system. */
int ncid; /* The ncid of the netCDF file. */
int dimid[NDIM3]; /* The dimension ID. */
int varid; /* The ID of the netCDF varable. */
int ioid; /* The I/O description ID. */
char filename[NC_MAX_NAME + 1]; /* Test filename. */
int num_flavors = 0; /* Number of iotypes available in this build. */
int format[NUM_NETCDF_FLAVORS]; /* Different output flavors. */
int ret; /* Return value. */
#ifdef TIMING
/* Initialize the GPTL timing library. */
if ((ret = GPTLinitialize ()))
return ret;
#endif
/* Initialize MPI. */
if ((ret = MPI_Init(&argc, &argv)))
MPIERR(ret);
if ((ret = MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN)))
MPIERR(ret);
/* Learn my rank and the total number of processors. */
if ((ret = MPI_Comm_rank(MPI_COMM_WORLD, &my_rank)))
MPIERR(ret);
if ((ret = MPI_Comm_size(MPI_COMM_WORLD, &ntasks)))
MPIERR(ret);
/* Check that a valid number of processors was specified. */
if (ntasks != TARGET_NTASKS)
fprintf(stderr, "Number of processors must be 4!\n");
printf("%d: ParallelIO Library darray_no_async example running on %d processors.\n",
my_rank, ntasks);
/* Turn on logging. */
if ((ret = PIOc_set_log_level(LOG_LEVEL)))
return ret;
/* Initialize the PIO IO system. This specifies how many and
* which processors are involved in I/O. */
if ((ret = PIOc_Init_Intracomm(MPI_COMM_WORLD, 1, ioproc_stride,
ioproc_start, PIO_REARR_BOX, &iosysid)))
ERR(ret);
/* Describe the decomposition. */
elements_per_pe = DIM_LEN_X * DIM_LEN_Y / TARGET_NTASKS;
/* Allocate and initialize array of decomposition mapping. */
PIO_Offset compdof[elements_per_pe];
for (int i = 0; i < elements_per_pe; i++)
compdof[i] = my_rank * elements_per_pe + i;
/* Create the PIO decomposition for this example. Since this
* is a variable with an unlimited dimension, we want to
* create a 2-D composition which represents one record. */
printf("rank: %d Creating decomposition...\n", my_rank);
if ((ret = PIOc_init_decomp(iosysid, PIO_INT, NDIM3 - 1, &dim_len[1], elements_per_pe,
compdof, &ioid, 0, NULL, NULL)))
ERR(ret);
/* The number of favors may change with the build parameters. */
#ifdef _PNETCDF
format[num_flavors++] = PIO_IOTYPE_PNETCDF;
#endif
format[num_flavors++] = PIO_IOTYPE_NETCDF;
#ifdef _NETCDF4
format[num_flavors++] = PIO_IOTYPE_NETCDF4C;
format[num_flavors++] = PIO_IOTYPE_NETCDF4P;
#endif
/* Use PIO to create the example file in each of the four
* available ways. */
for (int fmt = 0; fmt < num_flavors; fmt++)
{
/* Create a filename. */
sprintf(filename, "darray_no_async_iotype_%d.nc", format[fmt]);
/* Create the netCDF output file. */
printf("rank: %d Creating sample file %s with format %d...\n",
my_rank, filename, format[fmt]);
if ((ret = PIOc_createfile(iosysid, &ncid, &(format[fmt]), filename, PIO_CLOBBER)))
ERR(ret);
/* Define netCDF dimension and variable. */
printf("rank: %d Defining netCDF metadata...\n", my_rank);
for (int d = 0; d < NDIM3; d++)
if ((ret = PIOc_def_dim(ncid, dim_name[d], dim_len[d], &dimid[d])))
ERR(ret);
if ((ret = PIOc_def_var(ncid, VAR_NAME, PIO_INT, NDIM3, dimid, &varid)))
ERR(ret);
if ((ret = PIOc_enddef(ncid)))
ERR(ret);
/* Allocate storage for sample data. */
int buffer[elements_per_pe];
/* Write each timestep. */
for (int t = 0; t < NUM_TIMESTEPS; t++)
{
/* Create some data for this timestep. */
for (int i = 0; i < elements_per_pe; i++)
buffer[i] = 100 * t + START_DATA_VAL + my_rank;
/* Write data to the file. */
printf("rank: %d Writing sample data...\n", my_rank);
if ((ret = PIOc_setframe(ncid, varid, t)))
ERR(ret);
if ((ret = PIOc_write_darray(ncid, varid, ioid, elements_per_pe, buffer, NULL)))
ERR(ret);
}
/* THis will cause all data to be written to disk. */
if ((ret = PIOc_sync(ncid)))
ERR(ret);
/* Close the netCDF file. */
printf("rank: %d Closing the sample data file...\n", my_rank);
if ((ret = PIOc_closefile(ncid)))
ERR(ret);
/* Check the output file. */
/* if ((ret = check_file(iosysid, ntasks, filename, format[fmt], elements_per_pe, */
/* my_rank, ioid))) */
/* ERR(ret); */
}
/* Free the PIO decomposition. */
printf("rank: %d Freeing PIO decomposition...\n", my_rank);
if ((ret = PIOc_freedecomp(iosysid, ioid)))
ERR(ret);
/* Finalize the IO system. */
printf("rank: %d Freeing PIO resources...\n", my_rank);
if ((ret = PIOc_finalize(iosysid)))
ERR(ret);
/* Finalize the MPI library. */
MPI_Finalize();
#ifdef TIMING
/* Finalize the GPTL timing library. */
if ((ret = GPTLfinalize ()))
return ret;
#endif
printf("rank: %d SUCCESS!\n", my_rank);
return 0;
}
