IO descriptor structure. More...
#include <pio.h>
Public Attributes | |
| int | ioid |
| The ID of this io_desc_t. More... | |
| int | maplen |
| The length of the decomposition map. More... | |
| PIO_Offset * | map |
| A 1-D array with iodesc->maplen elements, which are the 1-based mappings to the global array for that task. More... | |
| int | nrecvs |
| Number of tasks involved in the communication between comp and io tasks. More... | |
| int | ndof |
| Local size of the decomposition array on the compute node. More... | |
| int | ndims |
| All vars included in this io_desc_t have the same number of dimensions. More... | |
| int * | dimlen |
| An array of size ndims with the length of each dimension. More... | |
| int | num_aiotasks |
| The actual number of IO tasks participating. More... | |
| int | rearranger |
| The rearranger in use for this variable. More... | |
| int | maxregions |
| Maximum number of regions in the decomposition. More... | |
| bool | needsfill |
| Does this decomp leave holes in the field (true) or write everywhere (false) More... | |
| int | maxbytes |
| The maximum number of bytes of this iodesc before flushing. More... | |
| int | piotype |
| The PIO type of the data. More... | |
| int | piotype_size |
| The size of one element of the piotype. More... | |
| MPI_Datatype | mpitype |
| The MPI type of the data. More... | |
| int | mpitype_size |
| The size in bytes of a datum of MPI type mpitype. More... | |
| PIO_Offset | llen |
| Length of the iobuffer on this task for a single field on the IO node. More... | |
| PIO_Offset | maxiobuflen |
| Maximum llen participating. More... | |
| int * | rfrom |
| Array (length nrecvs) of computation tasks received from. More... | |
| int * | rcount |
| Array (length nrecvs) of counts of data to be received from each computation task by the IO tasks. More... | |
| int * | scount |
| Array (length numiotasks) of data counts to send to each task in the communication in pio_swapm(). More... | |
| PIO_Offset * | sindex |
| Array (length ndof) for the BOX rearranger with the index for computation taks (send side during writes). More... | |
| PIO_Offset * | rindex |
| Index for the IO tasks (receive side during writes). More... | |
| MPI_Datatype * | rtype |
| Array (of length nrecvs) of receive MPI types in pio_swapm() call. More... | |
| MPI_Datatype * | stype |
| Array of send MPI types in pio_swapm() call. More... | |
| int | num_stypes |
| Number of send MPI types in pio_swapm() call. More... | |
| int | holegridsize |
| Used when writing fill data. More... | |
| int | maxholegridsize |
| max holegridsize across all io tasks, needed for netcdf and netcdf4c serial More... | |
| int | maxfillregions |
| Used when writing fill data. More... | |
| io_region * | firstregion |
| Linked list of regions. More... | |
| io_region * | fillregion |
| Used when writing fill data. More... | |
| rearr_opt_t | rearr_opts |
| Rearranger flow control options (handshake, non-blocking sends, pending requests) More... | |
| MPI_Comm | subset_comm |
| In the subset communicator each io task is associated with a unique group of comp tasks this is the communicator for that group. More... | |
| struct io_desc_t * | next |
| Pointer to the next io_desc_t in the list. More... | |
Detailed Description
IO descriptor structure.
This structure defines the mapping for a given variable between compute and IO decomposition.
Member Data Documentation
◆ dimlen
| int* io_desc_t::dimlen |
An array of size ndims with the length of each dimension.
◆ fillregion
| io_region* io_desc_t::fillregion |
Used when writing fill data.
◆ firstregion
| io_region* io_desc_t::firstregion |
Linked list of regions.
◆ holegridsize
| int io_desc_t::holegridsize |
Used when writing fill data.
◆ ioid
| int io_desc_t::ioid |
The ID of this io_desc_t.
◆ llen
| PIO_Offset io_desc_t::llen |
Length of the iobuffer on this task for a single field on the IO node.
The arrays from compute nodes gathered and rearranged to the io-nodes (which are sometimes collocated with compute nodes), each io task contains data from the compmap of one or more compute tasks in the iomap array.
◆ map
| PIO_Offset* io_desc_t::map |
A 1-D array with iodesc->maplen elements, which are the 1-based mappings to the global array for that task.
◆ maplen
| int io_desc_t::maplen |
The length of the decomposition map.
◆ maxbytes
| int io_desc_t::maxbytes |
The maximum number of bytes of this iodesc before flushing.
◆ maxfillregions
| int io_desc_t::maxfillregions |
Used when writing fill data.
◆ maxholegridsize
| int io_desc_t::maxholegridsize |
max holegridsize across all io tasks, needed for netcdf and netcdf4c serial
◆ maxiobuflen
| PIO_Offset io_desc_t::maxiobuflen |
Maximum llen participating.
◆ maxregions
| int io_desc_t::maxregions |
Maximum number of regions in the decomposition.
◆ mpitype
| MPI_Datatype io_desc_t::mpitype |
The MPI type of the data.
◆ mpitype_size
| int io_desc_t::mpitype_size |
The size in bytes of a datum of MPI type mpitype.
◆ ndims
| int io_desc_t::ndims |
All vars included in this io_desc_t have the same number of dimensions.
◆ ndof
| int io_desc_t::ndof |
Local size of the decomposition array on the compute node.
◆ needsfill
| bool io_desc_t::needsfill |
Does this decomp leave holes in the field (true) or write everywhere (false)
◆ next
◆ nrecvs
| int io_desc_t::nrecvs |
Number of tasks involved in the communication between comp and io tasks.
◆ num_aiotasks
| int io_desc_t::num_aiotasks |
The actual number of IO tasks participating.
◆ num_stypes
| int io_desc_t::num_stypes |
Number of send MPI types in pio_swapm() call.
◆ piotype
| int io_desc_t::piotype |
The PIO type of the data.
◆ piotype_size
| int io_desc_t::piotype_size |
The size of one element of the piotype.
◆ rcount
| int* io_desc_t::rcount |
Array (length nrecvs) of counts of data to be received from each computation task by the IO tasks.
◆ rearr_opts
| rearr_opt_t io_desc_t::rearr_opts |
Rearranger flow control options (handshake, non-blocking sends, pending requests)
◆ rearranger
| int io_desc_t::rearranger |
The rearranger in use for this variable.
◆ rfrom
| int* io_desc_t::rfrom |
Array (length nrecvs) of computation tasks received from.
◆ rindex
| PIO_Offset* io_desc_t::rindex |
Index for the IO tasks (receive side during writes).
◆ rtype
| MPI_Datatype* io_desc_t::rtype |
Array (of length nrecvs) of receive MPI types in pio_swapm() call.
◆ scount
| int* io_desc_t::scount |
Array (length numiotasks) of data counts to send to each task in the communication in pio_swapm().
◆ sindex
| PIO_Offset* io_desc_t::sindex |
Array (length ndof) for the BOX rearranger with the index for computation taks (send side during writes).
◆ stype
| MPI_Datatype* io_desc_t::stype |
Array of send MPI types in pio_swapm() call.
◆ subset_comm
| MPI_Comm io_desc_t::subset_comm |
In the subset communicator each io task is associated with a unique group of comp tasks this is the communicator for that group.
The documentation for this struct was generated from the following file:
