Module mpi::collective

Collective communication

Developing…

Unfinished features

• 5.8: All-to-all, MPI_Alltoallw()
• 5.10: Reduce-scatter, MPI_Reduce_scatter()
• 5.12: Nonblocking collective operations, MPI_Ialltoallw(), MPI_Ireduce_scatter()

Modules

• traits
  Collective communication traits

Structs

• SystemOperation
  A built-in operation like MPI_SUM
• UnsafeUserOperation
  An unsafe user-defined operation.
• UserOperation
  A user-defined operation.

Traits

• CommunicatorCollectives
  Collective communication patterns defined on Communicators
• Operation
  An operation to be used in a reduction or scan type operation, e.g. MPI_SUM
• Root
  Something that can take the role of ‘root’ in a collective operation.

Functions

• reduce_local_into
  Perform a local reduction.

Type Aliases

• UnsafeUserFunction
  A raw pointer to a function that can be used to define an UnsafeUserOperation.