From e68cb3542e08c9f22ce8a94fd88bebe0c121ca17 Mon Sep 17 00:00:00 2001 From: Volpeon Date: Mon, 3 Apr 2023 18:52:30 +0200 Subject: TI: Delta learning --- models/clip/embeddings.py | 50 +++++++++++++++++++++++++++++++---------------- 1 file changed, 33 insertions(+), 17 deletions(-) (limited to 'models/clip/embeddings.py') diff --git a/models/clip/embeddings.py b/models/clip/embeddings.py index 1e21965..d8343a0 100644 --- a/models/clip/embeddings.py +++ b/models/clip/embeddings.py @@ -12,7 +12,7 @@ from transformers.models.clip import CLIPTextConfig from transformers.models.clip.modeling_clip import CLIPTextEmbeddings -def resize_embedding(old_embedding: nn.Embedding, new_num_embeddings: int, initializer_factor: float = 1.0) -> nn.Embedding: +def resize_embedding(old_embedding: nn.Embedding, new_num_embeddings: int, initializer_factor: Optional[float] = None) -> nn.Embedding: old_num_embeddings, old_embedding_dim = old_embedding.weight.shape if old_num_embeddings == new_num_embeddings: @@ -26,13 +26,16 @@ def resize_embedding(old_embedding: nn.Embedding, new_num_embeddings: int, initi device=old_embedding.weight.device, dtype=old_embedding.weight.dtype ) - new_embedding.weight.data.normal_(mean=0.0, std=initializer_factor * 0.02) + if initializer_factor is not None: + new_embedding.weight.data.normal_(mean=0.0, std=initializer_factor * 0.02) + else: + nn.init.zeros_(new_embedding.weight.data) new_embedding.weight.data[:n, :] = old_embedding.weight.data[:n, :] return new_embedding class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings): - def __init__(self, config: CLIPTextConfig, embeddings: CLIPTextEmbeddings, alpha: float = 1.0, rank: int = 4): + def __init__(self, config: CLIPTextConfig, embeddings: CLIPTextEmbeddings, alpha: float = 1.0): super().__init__(config) self.token_embedding = embeddings.token_embedding @@ -40,17 +43,16 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings): self.initializer_factor = config.initializer_factor self.alpha = alpha - self.temp_token_embedding = nn.Embedding( - self.token_embedding.num_embeddings, - self.token_embedding.embedding_dim, - device=self.token_embedding.weight.device, - dtype=self.token_embedding.weight.dtype - ) - self.temp_token_embedding.weight.data = self.token_embedding.weight.data.clone().detach() + self.temp_token_embedding = nn.ParameterList() self.temp_token_ids = torch.tensor([], dtype=torch.long) def resize(self, size: int): - self.temp_token_embedding = resize_embedding(self.temp_token_embedding, size, self.initializer_factor) + for _ in range(len(self.temp_token_embedding), size): + self.temp_token_embedding.append(torch.zeros( + self.token_embedding.embedding_dim, + device=self.token_embedding.weight.device, + dtype=self.token_embedding.weight.dtype, + )) self.token_embedding = resize_embedding(self.token_embedding, size, self.initializer_factor) def add_embed( @@ -85,7 +87,6 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings): token_ids = torch.tensor(token_ids, dtype=torch.long) self.temp_token_ids = torch.cat([self.temp_token_ids, token_ids]) - self.temp_token_embedding.weight.data[token_ids] = initializer self.token_embedding.weight.data[token_ids] = initializer def load_embed(self, input_ids: list[int], filename: Path): @@ -96,16 +97,31 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings): save_file({"embed": self.get_embed(input_ids)}, filename) def persist(self): - self.token_embedding.weight.data[self.temp_token_ids] = self.temp_token_embedding.weight.data[self.temp_token_ids] + for id, emb in zip(self.temp_token_ids, self.temp_token_embedding): + self.token_embedding.weight.data[id] += self.alpha * emb + nn.init.zeros_(emb) self.temp_token_ids = torch.tensor([], dtype=torch.long) def get_embed(self, input_ids: Union[list[int], torch.LongTensor]): if isinstance(input_ids, list): input_ids = torch.tensor(input_ids, device=self.token_embedding.weight.device, dtype=torch.long) + all_temp_token_ids = self.temp_token_ids.to(input_ids.device) + embeds = self.token_embedding(input_ids) - mask = torch.isin(input_ids, self.temp_token_ids.to(input_ids.device)) - embeds[mask] = self.temp_token_embedding(input_ids[mask]) + mask = torch.isin(input_ids, all_temp_token_ids) + temp_token_ids = input_ids[mask] + + temp_token_ids = temp_token_ids.unsqueeze(1) + all_temp_token_ids = all_temp_token_ids.unsqueeze(0) + temp_token_ids = torch.nonzero(temp_token_ids == all_temp_token_ids)[:, 1].squeeze() + + if len(temp_token_ids): + embeds_override = torch.stack([ + self.temp_token_embedding[id] + for id in temp_token_ids + ]) + embeds[mask] += self.alpha * embeds_override return embeds @@ -129,7 +145,7 @@ class ManagedCLIPTextEmbeddings(CLIPTextEmbeddings): return embeddings -def patch_managed_embeddings(text_encoder: CLIPTextModel) -> ManagedCLIPTextEmbeddings: - text_embeddings = ManagedCLIPTextEmbeddings(text_encoder.config, text_encoder.text_model.embeddings) +def patch_managed_embeddings(text_encoder: CLIPTextModel, alpha: float = 1.0) -> ManagedCLIPTextEmbeddings: + text_embeddings = ManagedCLIPTextEmbeddings(text_encoder.config, text_encoder.text_model.embeddings, alpha) text_encoder.text_model.embeddings = text_embeddings return text_embeddings -- cgit v1.2.3-54-g00ecf