DeviceMesh

class tensorplay.distributed.device_mesh.DeviceMesh(device_type: str, mesh=None, *, mesh_dim_names=None, _dim_group_names=None, _rank_map=None, _sizes=None, _strides=None, _root_mesh=None)[source]

DeviceMesh represents a mesh of devices (torch parity).

The mesh is an n-d array whose values are global ranks. Process groups are created per mesh dimension so collectives can run on each dimension independently.

Example:

>>> from tensorplay.distributed.device_mesh import init_device_mesh
>>> mesh = init_device_mesh("cuda", mesh_shape=(2, 4),
...                         mesh_dim_names=("dp", "tp"))

classmethod from_group(group, device_type=None, mesh=None, mesh_dim_names=None) → DeviceMesh[source]

Construct a 1-D DeviceMesh from an existing ProcessGroup.

get_coordinate() → tuple[int, ...] | None[source]

Returns this rank’s coordinate in the mesh, or None if absent.

get_group(mesh_dim=None)[source]

Returns the process group along mesh_dim (torch parity).

get_local_rank(mesh_dim=None) → int[source]

Returns local rank along mesh_dim (torch parity).