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Legion Runtime
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#include <mapping.h>
Public Attributes | |
| std::vector< PhysicalInstance > | valid_instances |
| std::vector< CollectiveView > | valid_collectives |
The map partition mapper call is responsible for handling the mapping of a dependent partitioning operation to a specific physical region. The mapper is given a set of valid physical instances in the 'valid_instances' field. The mapper must then specify a set of chosen instances to use for the inline mapping operation in 'chosen_instances'. Multiple instances can be selected for different fields but the runtime will use the first instance that it finds that in the vector that has space for each field. Since all dependent partitioning operations have read-only privileges on their input regions, the mapper can request that the runtime not track the validity of the instance(s) used for the dependent parititoning operation by setting 'track_valid_region' to 'false'. The 'copy_fill_priority' field specifies the priorities of any copy or fills needed to bring the 'chosen_instances' up to date.
The mapper can also request profiling information for any copies issued by filling in the 'profiling_requests' set. The mapper can control the priority with which this profiling information is returned to the mapper with 'profiling priority'.
1.9.8