wehub-resource-sync
89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
|
|
# or more contributor license agreements. See the NOTICE file
|
|
# distributed with this work for additional information
|
|
# regarding copyright ownership. The ASF licenses this file
|
|
# to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance
|
|
# with the License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing,
|
|
# software distributed under the License is distributed on an
|
|
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
# KIND, either express or implied. See the License for the
|
|
# specific language governing permissions and limitations
|
|
# under the License.
|
|
"""Autoload built-in and out-of-tree backend libraries and registration hooks."""
|
|
|
|
from __future__ import annotations
|
|
|
|
import os
|
|
import warnings
|
|
from importlib.metadata import entry_points
|
|
from pathlib import Path
|
|
|
|
from tvm_ffi.libinfo import load_lib_ctypes
|
|
|
|
from tvm.backend.loader import load
|
|
from tvm.base import _LOADED_LIBS
|
|
|
|
_BUILTIN_BACKENDS = (
|
|
"cuda",
|
|
"metal",
|
|
"rocm",
|
|
"trn",
|
|
"opencl",
|
|
"vulkan",
|
|
"webgpu",
|
|
"hexagon",
|
|
"adreno",
|
|
)
|
|
|
|
_AUTO_LOAD_DONE = False
|
|
|
|
|
|
def _load_builtin_backends() -> None:
|
|
"""Load all in-tree backend Python hooks."""
|
|
for name in _BUILTIN_BACKENDS:
|
|
load(name)
|
|
|
|
runtime_dir = Path(_LOADED_LIBS["tvm_runtime"]._name).resolve().parent
|
|
try:
|
|
# Load libtvm_runtime_extra if available for registration side effects.
|
|
_LOADED_LIBS["tvm_runtime_extra"] = load_lib_ctypes(
|
|
package="tvm",
|
|
target_name="tvm_runtime_extra",
|
|
extra_lib_paths=[runtime_dir],
|
|
mode="RTLD_LOCAL",
|
|
)
|
|
except (OSError, FileNotFoundError, RuntimeError):
|
|
pass
|
|
return None
|
|
|
|
|
|
def _autoload_backends() -> None:
|
|
"""Load built-in backends and invoke out-of-tree backend entry points."""
|
|
global _AUTO_LOAD_DONE
|
|
if _AUTO_LOAD_DONE:
|
|
return
|
|
_AUTO_LOAD_DONE = True
|
|
|
|
if os.environ.get("TVM_DEVICE_BACKEND_AUTOLOAD", "1") == "0":
|
|
return
|
|
|
|
from tvm import _RUNTIME_ONLY # pylint: disable=import-outside-toplevel
|
|
|
|
if not _RUNTIME_ONLY:
|
|
_load_builtin_backends()
|
|
|
|
# Out-of-tree extensions opt into being loaded automatically at ``import tvm`` time
|
|
# by declaring an entry point in the ``tvm.backends`` group:
|
|
# [project.entry-points."tvm.backends"] tvm_foo = "tvm_foo:_autoload".
|
|
# Autoload can be disabled via ``TVM_DEVICE_BACKEND_AUTOLOAD=0``.
|
|
for entry_pt in entry_points(group="tvm.backends"):
|
|
try:
|
|
entry_pt.load()()
|
|
except Exception as e: # pylint: disable=broad-except
|
|
warnings.warn(f"Failed to autoload tvm backend '{entry_pt.name}': {e}")
|