Index of values

The Mpi.allgather* functions behave like the corresponding Mpi.gather* functions, except that the result of the gather operation is available at all nodes, not only at the root node.

The Mpi.allreduce_* operations are similar to the corresponding Mpi.reduce_* operations, except that the result of the reduction is made available at all nodes.

The special values of the tag and src arguments of Mpi.receive, Mpi.receive_status and Mpi.probe, indicating that any message tag is acceptable (for Mpi.any_tag) or any message source is acceptable (for Mpi.any_source).

Mpi.barrier comm suspends the calling process until all nodes in communicator comm are executing Mpi.barrier comm.

Mpi.broadcast d root comm broadcasts data d from node with rank root in comm to all other nodes in comm.

Specialized versions of Mpi.broadcast for integers, floats, arrays of integers and arrays of floats.

Same as Mpi.broadcast, except that the data (first argument) is provided as an option type.

The inverse operation of Mpi.cart_rank.

Mpi.cart_create comm dims periodic reorder embeds a cartesian topology (multi-dimensional grid) on the nodes of communicator comm, and return a new communicator with that information attached.

Mpi.cart_rank comm coords return the rank of the node in the cartesian topology comm that is at coordinates coords.

In Mpi.comm_split, a node can pass Mpi.color_none as the col argument to indicate that it does not want to be part of any of the new communicators.

Compare two communicators and return true if they are the same, false otherwise.

Mpi.comm_create comm group creates a communicator whose nodes are those described in group.

Mpi.comm_group comm returns the group of all nodes belonging to the communicator comm, with the same ranks as in comm.

Return the rank of the calling node in the given communicator.

Return the size (number of nodes) in the given communicator.

Mpi.comm_split comm col key splits the communicator into several communicators based on the values of col and key at every node.

The global communicator.

Mpi.dims_create numnodes hints helps determining a suitable dims argument to Mpi.cart_create given a number of nodes numnodes, the number of dimensions required, and optional constraints.

Mpi.gather d root comm gathers the values of the d argument at all nodes onto node root, and returns those values as an array.

Specialized versions of Mpi.gather for integers and floats.

Specialized versions of Mpi.gather for arrays of integers and arrays of floats.

Union, intersection and set difference over groups.

Mpi.group_excl group ranks returns the subset of group containing the nodes whose ranks are not given in the array ranks.

Mpi.group_incl group ranks returns the subset of group containing the nodes whose ranks are given in the array ranks.

Mpi.group_range_excl group ranges returns the subset of group containing the nodes whose ranks do not belong to the ranges listed in ranges.

Mpi.group_range_incl group ranges returns the subset of group containing the nodes whose ranks belong to the ranges listed in ranges.

Return the rank of the calling node in the given group.

Return the size (number of nodes) in the given group.

Mpi.group_translate_ranks g1 ranks g2 translates the ranks of a number of nodes from one group to another.

Mpi.probe src tag comm blocks until a message is available on communicator comm, with source and tag matching the src and tag arguments as described in Mpi.receive.

Mpi.receive src tag comm blocks until a message is available, and returns the data contained in that message.

Specialized versions of Mpi.send and Mpi.receive for communicating integers, floating-point numbers, arrays of integers, and arrays of floating-point numbers.

Same as Mpi.receive, but returns a triple (d, src, tag) where d is the data associated with the message, src the rank of the node that sent the message, and tag the actual tag attached to the message.

Mpi.reduce_int d op root comm computes the value of d0 op d1 op ... op dN, where d0 ... dN are the values of the d argument at every node in comm.

Mpi.reduce_int_array d res op root comm computes Array.length d reductions by operation op simultaneously.

Mpi.scan_int d res op comm performs a scan operation over the integers d at every node.

Same as Mpi.scan_int and Mpi.scan_float, but perform several scanning operations on the elements of the input array (first argument).

Mpi.scatter a root comm scatters the elements of array a from node root to all nodes in comm.

Specialized versions of Mpi.scatter for integers and floats.

Specialized versions of Mpi.scatter for arrays of integers and arrays of floats.

Mpi.send d dst tag comm sends a message containing data d to the node that has rank dst in communicator comm.

Return the wall-clock time elapsed at the calling node since the beginning of the program execution.