# SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed 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.
from ..llama.config import LLaMAConfig
from ..qwen.config import QWenConfig
# MedusaConfig is a thin wrapper that picks parent class for GenericMedusaConfig
class QWenMedusaConfig(QWenConfig):
def __init__(self, num_medusa_heads, num_medusa_layers, max_draft_len,
**kwargs):
self.num_medusa_heads = num_medusa_heads
self.num_medusa_layers = num_medusa_layers
self.max_draft_len = max_draft_len
super().__init__(**kwargs)
def to_dict(self):
output = super().to_dict()
# Serialize the fields added in MedusaConfig
output['num_medusa_heads'] = self.num_medusa_heads
output['num_medusa_layers'] = self.num_medusa_layers
output['max_draft_len'] = self.max_draft_len
return output
class LLaMAMedusaConfig(LLaMAConfig):
def __init__(self, num_medusa_heads, num_medusa_layers, max_draft_len,
**kwargs):
self.num_medusa_heads = num_medusa_heads
self.num_medusa_layers = num_medusa_layers
self.max_draft_len = max_draft_len
super().__init__(**kwargs)
def to_dict(self):
output = super().to_dict()
# Serialize the fields added in MedusaConfig
output['num_medusa_heads'] = self.num_medusa_heads
output['num_medusa_layers'] = self.num_medusa_layers
output['max_draft_len'] = self.max_draft_len
return output
# Medusa-specific config is stored and retrieved from GenericMedusaConfig.
[docs]
class MedusaConfig():
def __init__(self,
*,
num_medusa_heads: int = 4,
num_medusa_layers: int = 1,
max_draft_len: int = 63,
**kwargs):
GenericMedusaConfig = QWenMedusaConfig if "qwen" in kwargs[
'model_type'] else LLaMAMedusaConfig
self.config = GenericMedusaConfig(num_medusa_heads, num_medusa_layers,
max_draft_len, **kwargs)
# Specialization to redirect accesses to self.config
def __getattribute__(self, name):
if name == 'config' or '__' in name:
return object.__getattribute__(self, name)
else:
config = object.__getattribute__(self, 'config')
return config.__getattribute__(name)