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We expose 3 modes: * `SpecifiedLayout`: User specifies the `minor_to_major` field of the layout. Tiling not exposed yet. * `DefaultLayout`: PJRT chooses the layout. It defaults to the current behavior. * `AUTO`: Compiler chooses the layout. This field is not a layout per se. It's a request to get the layout from the compiler. This field cannot be on an Array or other data types. It can only be on jit. Public API coming soon. Co-authored-by: Roy Frostig <frostig@google.com> PiperOrigin-RevId: 582692036
79 lines
2.1 KiB
Python
79 lines
2.1 KiB
Python
# Copyright 2023 The JAX Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the ific language governing permissions and
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# limitations under the License.
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from __future__ import annotations
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from jax._src.lib import xla_client as xc
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class Layout:
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pass
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class XLACompatibleLayout(Layout):
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@classmethod
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def _from_xla_layout(cls, xla_layout) -> XLACompatibleLayout:
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raise NotImplementedError("Subclasses should implement this method.")
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def _to_xla_layout(self) -> str:
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raise NotImplementedError("Subclasses should implement this method.")
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class SpecifiedLayout(XLACompatibleLayout):
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minor_to_major: tuple[int, ...]
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def __init__(self, minor_to_major: tuple[int, ...]):
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self.minor_to_major = minor_to_major
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def __repr__(self):
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return f'SpecifiedLayout(minor_to_major={self.minor_to_major})'
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def __hash__(self):
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return hash(self.minor_to_major)
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def __eq__(self, other):
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if not isinstance(other, SpecifiedLayout):
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return False
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return self.minor_to_major == other.minor_to_major
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@classmethod
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def _from_xla_layout(cls, xla_layout: xc.Layout) -> XLACompatibleLayout:
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return cls(xla_layout.minor_to_major())
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def _to_xla_layout(self) -> str:
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return xc.Layout(self.minor_to_major).to_string()
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class DefaultLayout(XLACompatibleLayout):
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def __repr__(self):
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return 'DefaultLayout()'
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def __hash__(self):
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return hash(type(self))
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def __eq__(self, other):
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return isinstance(other, DefaultLayout) and type(self) == type(other)
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def _to_xla_layout(self) -> str:
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return "default"
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class LayoutRequest:
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def __repr__(self):
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return "Request a layout from the compiler"
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AUTO = LayoutRequest()
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