IO descriptor structure. More...
#include <pio.h>
Collaboration diagram for io_desc_t:
Public Attributes | |
| int | ioid |
| The ID of this io_desc_t. | |
| int | maplen |
| The length of the decomposition map. | |
| PIO_Offset * | map |
| A 1-D array with iodesc->maplen elements, which are the 1-based mappings to the global array for that task. | |
| int * | remap |
| If the map passed in is not monotonically increasing then map is sorted and remap is an array of original indices of map. More... | |
| int | nrecvs |
| Number of tasks involved in the communication between comp and io tasks. | |
| int | ndof |
| Local size of the decomposition array on the compute node. | |
| int | ndims |
| All vars included in this io_desc_t have the same number of dimensions. | |
| int * | dimlen |
| An array of size ndims with the global length of each dimension. | |
| int | num_aiotasks |
| The actual number of IO tasks participating. | |
| int | rearranger |
| The rearranger in use for this variable. | |
| int | maxregions |
| Maximum number of regions in the decomposition. | |
| bool | needsfill |
| Does this decomp leave holes in the field (true) or write everywhere (false) | |
| bool | needssort |
| If the map is not monotonically increasing we will need to sort it. | |
| int | maxbytes |
| The maximum number of bytes of this iodesc before flushing. | |
| int | piotype |
| The PIO type of the data. | |
| int | piotype_size |
| The size of one element of the piotype. | |
| MPI_Datatype | mpitype |
| The MPI type of the data. | |
| int | mpitype_size |
| The size in bytes of a datum of MPI type mpitype. | |
| PIO_Offset | llen |
| Length of the iobuffer on this task for a single field on the IO node. More... | |
| int | maxiobuflen |
| Maximum llen participating. | |
| int * | rfrom |
| Array (length nrecvs) of computation tasks received from. | |
| int * | rcount |
| Array (length nrecvs) of counts of data to be received from each computation task by the IO tasks. | |
| int * | scount |
| Array (length numiotasks) of data counts to send to each task in the communication in pio_swapm(). | |
| PIO_Offset * | sindex |
| Array (length ndof) for the BOX rearranger with the index for computation taks (send side during writes). | |
| PIO_Offset * | rindex |
| Index for the IO tasks (receive side during writes). | |
| MPI_Datatype * | rtype |
| Array (of length nrecvs) of receive MPI types in pio_swapm() call. | |
| MPI_Datatype * | stype |
| Array of send MPI types in pio_swapm() call. | |
| int | num_stypes |
| Number of send MPI types in pio_swapm() call. | |
| int | holegridsize |
| Used when writing fill data. | |
| int | maxholegridsize |
| max holegridsize across all io tasks, needed for netcdf and netcdf4c serial | |
| int | maxfillregions |
| Used when writing fill data. | |
| io_region * | firstregion |
| Linked list of regions. | |
| io_region * | fillregion |
| Used when writing fill data. | |
| rearr_opt_t | rearr_opts |
| Rearranger flow control options (handshake, non-blocking sends, pending requests) | |
| 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. | |
| UT_hash_handle | hh |
| Hash table entry. | |
Detailed Description
IO descriptor structure.
This structure defines the mapping for a given variable between compute and IO decomposition.
Member Data Documentation
◆ 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.
◆ remap
| int* io_desc_t::remap |
If the map passed in is not monotonically increasing then map is sorted and remap is an array of original indices of map.
Remap.
The documentation for this struct was generated from the following file:
