File size: 3,175 Bytes
76513ec | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | from __future__ import annotations
from typing import Callable, Iterable, TYPE_CHECKING
import torch
if TYPE_CHECKING:
from torch import Tensor
from .base import ModelBase, gguf
from .llama import LlamaModel
@ModelBase.register("AfmoeForCausalLM")
class AfmoeModel(LlamaModel):
model_arch = gguf.MODEL_ARCH.AFMOE
def set_gguf_parameters(self):
super().set_gguf_parameters()
# MoE parameters
if (n_shared_experts := self.hparams.get("num_shared_experts")) is not None:
self.gguf_writer.add_expert_shared_count(n_shared_experts)
if (moe_intermediate_size := self.hparams.get("moe_intermediate_size")) is not None:
self.gguf_writer.add_expert_feed_forward_length(moe_intermediate_size)
if (n_dense_layers := self.hparams.get("num_dense_layers")) is not None:
self.gguf_writer.add_leading_dense_block_count(n_dense_layers)
# Route normalization and scaling
if (route_norm := self.hparams.get("route_norm")) is not None:
self.gguf_writer.add_expert_weights_norm(route_norm)
if (route_scale := self.hparams.get("route_scale")) is not None:
self.gguf_writer.add_expert_weights_scale(route_scale)
# Sliding window attention
if (sliding_window := self.hparams.get("sliding_window")) is not None:
self.gguf_writer.add_sliding_window(sliding_window)
@classmethod
def filter_tensors(cls, item: tuple[str, Callable[[], Tensor]]) -> tuple[str, Callable[[], Tensor]] | None:
name, gen = item
if name.endswith(".expert_bias"):
name = name.replace(".expert_bias", ".expert_bias.bias")
return super().filter_tensors((name, gen))
def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None) -> Iterable[tuple[str, Tensor]]:
# Handle expert weights - they're already merged in the HF format
# process the experts separately
if name.find("mlp.experts") != -1:
n_experts = self.find_hparam(["num_local_experts", "num_experts"])
assert bid is not None
if self._experts is None:
self._experts = [{} for _ in range(self.block_count)]
self._experts[bid][name] = data_torch
if len(self._experts[bid]) >= n_experts * 3:
# merge the experts into a single 3d tensor
for w_name in ["gate_proj", "up_proj", "down_proj"]:
datas: list[Tensor] = []
for xid in range(n_experts):
ename_to_retrieve = f"model.layers.{bid}.mlp.experts.{xid}.{w_name}.weight"
datas.append(self._experts[bid][ename_to_retrieve])
del self._experts[bid][ename_to_retrieve]
data_torch = torch.stack(datas, dim=0)
merged_name = f"model.layers.{bid}.mlp.experts.{w_name}.weight"
yield from ModelBase.modify_tensors(self, data_torch, merged_name, bid)
return
else:
return
yield from ModelBase.modify_tensors(self, data_torch, name, bid)
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