XLAEnvironment

class lightning.pytorch.plugins.environments.XLAEnvironment(*args, **kwargs)[source]

Bases: ClusterEnvironment

Cluster environment for training on a TPU Pod with the PyTorch/XLA library.

A list of environment variables set by XLA can be found here.

static detect()[source]

Detects the environment settings corresponding to this cluster and returns True if they match.

Return type:

bool

global_rank()[source]

The rank (index) of the currently running process across all host and devices.

The output is cached for performance.

Return type:

int

local_rank()[source]

The rank (index) of the currently running process inside of the current host.

The output is cached for performance.

Return type:

int

node_rank()[source]

The rank (index) of the host on which the current process runs.

The output is cached for performance.

Return type:

int

world_size()[source]

The number of processes across all devices and hosts.

The output is cached for performance.

Return type:

int

property creates_processes_externally: bool

Whether the environment creates the subprocesses or not.

property main_address: str

The main address through which all processes connect and communicate.

property main_port: int

An open and configured port in the main node through which all processes communicate.