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281 lines
10 KiB
281 lines
10 KiB
4 days ago
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# Copyright 2025 The HuggingFace Inc. team. All rights reserved.
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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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# http://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 specific language governing permissions and
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# limitations under the License.
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from ..utils import PushToHubMixin, is_torch_available
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if is_torch_available():
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import torch
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def infer_device(model):
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"""
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Infers the device type from the model parameters.
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Args:
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model: The model instance.
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Returns:
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The device type.
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"""
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EXAMPLE_MAPPING = """
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{
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"RMSNorm": {
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"cuda":
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"kernels-community/layer_norm:LlamaRMSNorm",
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...
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},
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...
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}
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"""
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try:
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param = next(model.parameters())
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except StopIteration:
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raise ValueError(
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f"Cannot determine model device, please provide a device to the mapping. Example: {EXAMPLE_MAPPING}"
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)
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dev_type = param.device.type
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if dev_type == "cuda":
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# Refine based on actual platform
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if torch.version.hip is not None:
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return "rocm"
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return dev_type
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def add_to_mapping(layer_name, device, repo_name, mode, compatible_mapping):
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from kernels import LayerRepository
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if device not in ["cuda", "rocm", "xpu", "npu"]:
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raise ValueError(f"Only cuda, rocm, xpu and npu devices supported, got: {device}")
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repo_layer_name = repo_name.split(":")[1]
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repo_id = repo_name.split(":")[0]
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compatible_mapping[layer_name] = {
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device: {
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mode: LayerRepository(
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repo_id=repo_id,
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layer_name=repo_layer_name,
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)
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}
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}
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def add_to_mapping_local(layer_name, device, repo_name, mode, compatible_mapping):
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from pathlib import Path
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from kernels import LocalLayerRepository
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if device not in ["cuda", "rocm", "xpu", "npu"]:
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raise ValueError(f"Only cuda, rocm, xpu and npu devices supported, got: {device}")
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repo_layer_name = repo_name.split(":")[1]
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repo_path = repo_name.split(":")[0]
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repo_package_name = repo_path.split("/")[-1]
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compatible_mapping[layer_name] = {
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device: {
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mode: LocalLayerRepository(
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repo_path=Path(repo_path),
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package_name=repo_package_name,
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layer_name=repo_layer_name,
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)
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}
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}
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class KernelConfig(PushToHubMixin):
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"""
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Kernel configuration class. This class is used to configure the kernel mapping for a model.
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"""
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def __init__(self, kernel_mapping={}, use_local_kernel=False):
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self.kernel_mapping = kernel_mapping
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self.registered_layer_names = {}
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self.use_local_kernel = use_local_kernel
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def update_kernel(self, repo_id, registered_name, layer_name, device, mode, revision=None):
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from kernels import LayerRepository
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self.kernel_mapping[registered_name] = {
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device: {
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mode: LayerRepository(
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repo_id=repo_id,
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layer_name=layer_name,
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revision=revision,
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)
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}
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}
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def store_registered_layer_names(self, model):
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for name, module in model.named_modules():
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if hasattr(module, "kernel_layer_name"):
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self.registered_layer_names[name] = module.kernel_layer_name
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def sanitize_kernel_mapping(self, model):
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"""
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Validates the kernel_mapping to ensure that:
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1. Each layer_name in the mapping is registered in the model (i.e., the model contains a module with a matching kernel_layer_name).
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2. Each kernel value is either a string of the form 'org/repo:layer_name' or a dict mapping device types ("cuda", "rocm", "xpu", "npu") to such strings.
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3. Each device key in a dict is one of "cuda", "rocm", "xpu", or "npu".
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4. Each repo_name is a valid repository and layer name in the format 'org/repo:layer_name' (i.e., a string containing both a slash and a colon).
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5. If a local path is detected, it should be in the format '/abs/path:layer_name'. The absolute path must include the `package_name`, like "/home/user/layer_norm".
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Args:
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model: The model instance whose modules are checked for registered kernel_layer_name attributes.
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Raises:
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ValueError: If a layer_name is not registered in the model, if a device is not supported,
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or if a repo_name is not a valid 'org/repo:layer_name' string.
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"""
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MAPPING_FORMAT = """
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For single device form remote
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{
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"RMSNorm":
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"kernels-community/layer_norm:LlamaRMSNorm",
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...
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},
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For multiple devices form remote
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{
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"RMSNorm": {
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"cuda":
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"kernels-community/layer_norm:LlamaRMSNorm",
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"rocm":
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"kernels-community/layer_norm:LlamaRMSNorm",
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...
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},
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...
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}
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For single device form local
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{
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"RMSNorm":
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"/abs/path:LlamaRMSNorm",
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...
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},
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For multiple devices form local
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{
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"RMSNorm": {
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"cuda":
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"/abs/path:LlamaRMSNorm",
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"rocm":
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"/abs/path:LlamaRMSNorm",
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...
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},
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...
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}
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"""
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self.store_registered_layer_names(model)
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# Validate that the kernel mapping is a dict
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if not isinstance(self.kernel_mapping, dict):
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raise ValueError(
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f"Kernel mapping must be a dict of the following format: {MAPPING_FORMAT}, got: {type(self.kernel_mapping)}"
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)
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for layer_name, kernel in self.kernel_mapping.items():
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if layer_name not in self.registered_layer_names.values():
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raise ValueError(
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f"Layer {layer_name} is not registered in the model, please register it first using register_kernel_forward_from_hub"
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)
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if isinstance(kernel, str):
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if "/" not in kernel or ":" not in kernel:
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raise ValueError(
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f"Kernel mapping for '{layer_name}' must be a valid repo name with a layer name (e.g., 'org/repo:layer_name' or '/abs/path:layer_name'), got: {kernel}"
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)
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elif isinstance(kernel, dict):
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for device, repo_name in kernel.items():
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if device not in ["cuda", "rocm", "xpu", "npu"]:
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raise ValueError(f"Only cuda, rocm, xpu and npu devices supported, got: {device}")
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if not isinstance(repo_name, str) or "/" not in repo_name or ":" not in repo_name:
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raise ValueError(
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f"Kernel mapping for '{layer_name}' must be a valid repo name with a layer name (e.g., 'org/repo:layer_name' or '/abs/path:layer_name'), got: {repo_name}"
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)
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else:
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raise ValueError(f"Kernel mapping must follow the format: {MAPPING_FORMAT}, got: {kernel}")
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def create_compatible_mapping(self, model, compile=False):
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"""
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Transforms a simple kernel_mapping of the form:
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{
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"RMSNorm":
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"kernels-community/layer_norm:LlamaRMSNorm",
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...
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},
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or for local path:
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{
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"RMSNorm":
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"/home/user/liger_kernels:LigerRMSNorm",
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...
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},
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into a nested mapping:
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{
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"RMSNorm": {
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"cuda": {
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Mode.INFERENCE: LayerRepository(
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repo_id="kernels-community/layer_norm",
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layer_name="LlamaRMSNorm",
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)
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}
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}
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}
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or for local path:
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{
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"RMSNorm": {
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"cuda": {
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Mode.INFERENCE: LocalLayerRepository(
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repo_path=Path("/home/user/liger_kernels"),
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package_name="liger_kernels",
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layer_name="LigerRMSNorm",
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)
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}
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}
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}
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that's compatible with the kernels library.
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The device is inferred from the model's parameters if not provided.
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The Mode is inferred from the model's training state.
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"""
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from kernels import Mode
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compatible_mapping = {}
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current_device = infer_device(model)
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for layer_name, kernel in self.kernel_mapping.items():
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# Infer Mode: use Mode.TRAINING if model is training, else use Mode.INFERENCE
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mode = Mode.TRAINING if model.training else Mode.INFERENCE
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if compile:
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mode = mode | Mode.TORCH_COMPILE
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if isinstance(kernel, str):
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repo_name = kernel
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if not self.use_local_kernel:
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add_to_mapping(layer_name, current_device, repo_name, mode, compatible_mapping)
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else:
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add_to_mapping_local(layer_name, current_device, repo_name, mode, compatible_mapping)
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elif isinstance(kernel, dict):
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for device, repo_name in kernel.items():
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if device != current_device:
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continue
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if not self.use_local_kernel:
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add_to_mapping(layer_name, device, repo_name, mode, compatible_mapping)
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else:
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add_to_mapping_local(layer_name, device, repo_name, mode, compatible_mapping)
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self.kernel_mapping = compatible_mapping
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