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# Copyright 2024 Bytedance Ltd. and/or its affiliates
#
# 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.
def get_weight_loader(arch: str):
from verl.models.mcore.loader import load_state_dict_to_megatron_gptmodel
_MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY = {
"LlamaForCausalLM": load_state_dict_to_megatron_gptmodel,
"Qwen2ForCausalLM": load_state_dict_to_megatron_gptmodel,
}
if arch in _MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY:
return _MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY[arch]
raise ValueError(f"Model architectures {arch} loader are not supported for now. Supported architectures: {_MODEL_WEIGHT_MEGATRON_LOADER_REGISTRY.keys()}")
def get_weight_saver(arch: str):
from verl.models.mcore.saver import merge_megatron_ckpt_gptmodel, merge_megatron_ckpt_gptmodel_mixtral, merge_megatron_ckpt_gptmodel_qwen_moe
_MODEL_WEIGHT_MEGATRON_SAVER_REGISTRY = {
"LlamaForCausalLM": merge_megatron_ckpt_gptmodel,
"Qwen2ForCausalLM": merge_megatron_ckpt_gptmodel,
"MixtralForCausalLM": merge_megatron_ckpt_gptmodel_mixtral,
"Qwen2MoeForCausalLM": merge_megatron_ckpt_gptmodel_qwen_moe,
"Qwen3ForCausalLM": merge_megatron_ckpt_gptmodel,
"Qwen3MoeForCausalLM": merge_megatron_ckpt_gptmodel_qwen_moe,
}
if arch in _MODEL_WEIGHT_MEGATRON_SAVER_REGISTRY:
return _MODEL_WEIGHT_MEGATRON_SAVER_REGISTRY[arch]
raise ValueError(f"Model architectures {arch} saver are not supported for now. Supported architectures: {_MODEL_WEIGHT_MEGATRON_SAVER_REGISTRY.keys()}")
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