mindspore.communication.comm_func

Collection communication functional interface

Note that the APIs in the following list need to preset communication environment variables.

For Ascend/GPU/CPU devices, it is recommended to use the msrun startup method without any third-party or configuration file dependencies. Please see the msrun start up for more details.

API Name	Description	Supported Platforms
mindspore.communication.comm_func.all_gather_into_tensor	Gathers tensors from the specified communication group and returns the tensor which is all gathered.	Ascend GPU
mindspore.communication.comm_func.all_reduce	Reduce tensors across all devices in such a way that all deviceswill get the same final result, returns the tensor which is all reduced.	Ascend GPU CPU
mindspore.communication.comm_func.all_to_all_single_with_output_shape	scatter and gather input with split size to/from all rank, and return result in a single tensor.	Ascend
mindspore.communication.comm_func.all_to_all_with_output_shape	scatter and gather list of tensor to/from all rank according to input/output tensor list.	Ascend
mindspore.communication.comm_func.barrier	Synchronizes all processes in the specified group.	Ascend
mindspore.communication.comm_func.batch_isend_irecv	Batch send and recv tensors asynchronously.	Ascend
mindspore.communication.comm_func.broadcast	Broadcasts the tensor to the whole group.	Ascend GPU
mindspore.communication.comm_func.gather_into_tensor	Gathers tensors from the specified communication group.	Ascend
mindspore.communication.comm_func.irecv	Receive tensors from src.	Ascend GPU
mindspore.communication.comm_func.isend	Send tensors to the specified dest_rank.	Ascend GPU
mindspore.communication.comm_func.P2POp	Object for batch_isend_irecv input, to store information of "isend" and "irecv".	Ascend
mindspore.communication.comm_func.reduce	Reduces tensors across the processes in the specified communication group, sends the result to the target dst(global rank), and returns the tensor which is sent to the target process.	Ascend
mindspore.communication.comm_func.reduce_scatter_tensor	Reduces and scatters tensors from the specified communication group and returns the tensor which is reduced and scattered.	Ascend GPU
mindspore.communication.comm_func.scatter_tensor	Scatter tensor evently across the processes in the specified communication group.	Ascend GPU