reduce_scatter

A reduce scatter operation. More...

Collaboration diagram for reduce_scatter:

Classes
class	lci::reduce_scatter_x
	The actual implementation for reduce_scatter. More...

Detailed Description

A reduce scatter operation.

This operation assumes the send count is equal to recvcount * item_size and sendbuf is of size at least recvcount * item_size * get_rank_n().

Parameters

[in]	runtime	of type runtime_t; optional argument; The runtime object.
[in]	sendbuf	of type const void*; positional argument; The local buffer base address to send.
[in]	recvbuf	of type void*; positional argument; The local buffer base address to recv.
[in]	recvcount	of type size_t; positional argument; The number of data items to receive one each rank.
[in]	item_size	of type size_t; positional argument; The size of each data item.
[in]	op	of type reduce_op_t; positional argument; The reduction operation.
[in]	device	of type device_t; optional argument; The device to use.
[in]	endpoint	of type endpoint_t; optional argument; The endpoint to use.
[in]	matching_engine	of type matching_engine_t; optional argument; The matching engine to use.
[in]	comp	of type comp_t; optional argument; The completion to signal when the operation completes.
[in]	algorithm	of type reduce_scatter_algorithm_t; optional argument; The collective algorithm to use.
[in]	ring_nsteps	of type int; optional argument; The number of steps in the ring algorithm.