SingleDeviceStrategy
- class lightning.pytorch.strategies.SingleDeviceStrategy(device='cpu', accelerator=None, checkpoint_io=None, precision_plugin=None)[source]
Bases:
Strategy
Strategy that handles communication on a single device.
- all_gather(tensor, group=None, sync_grads=False)[source]
Perform a all_gather on all processes.
- Return type:
Tensor
- barrier(*args, **kwargs)[source]
Synchronizes all processes which blocks processes until the whole group enters this function.
- Parameters:
- Return type:
- broadcast(obj, src=0)[source]
Broadcasts an object to all processes.
- reduce(tensor, *args, **kwargs)[source]
Reduces a tensor from several distributed processes to one aggregated tensor. Since this strategy only operates with a single device, the reduction is simply the identity.
- property is_global_zero: bool
Whether the current process is the rank zero process not only on the local node, but for all nodes.
- property root_device: device
Returns the root device.