28 lines
911 B
Python
28 lines
911 B
Python
import abc
|
|
import torch.nn as nn
|
|
|
|
class Sharder(abc.ABC):
|
|
"""
|
|
This is an interface which allows user to create more advanced
|
|
sharding strategies that are not easily be composed by the
|
|
`ShardingSpec`.
|
|
|
|
:class:`torch.distributed._shard.sharding_plan.ShardingPlan` could
|
|
take an object of the `Sharder` and call `shard` to shard the module,
|
|
then replace the original module with sharded module returned.
|
|
"""
|
|
@abc.abstractmethod
|
|
def shard(self, module: nn.Module) -> nn.Module:
|
|
"""
|
|
Shard a module base on the implementation of this method, and
|
|
return the sharded version of the module.
|
|
|
|
Args:
|
|
module (:class:`torch.nn.Module`):
|
|
The module to apply sharding to.
|
|
Returns:
|
|
A :class:`torch.nn.Module` object that represents a module
|
|
that's already been sharded.
|
|
"""
|
|
pass
|