Sample pack trust remote code v2 (#1873)

* fix the multipack patch for remote code models

* add deepseek v2 lite example w fsdp

examples/deepseek-v2/fft-fsdp-16b.yaml

@@ -0,0 +1,67 @@
+base_model: deepseek-ai/DeepSeek-V2-Lite
+trust_remote_code: true
+
+load_in_8bit: false
+load_in_4bit: false
+strict: false
+
+datasets:
+  - path: tatsu-lab/alpaca
+    type: alpaca
+dataset_prepared_path: last_run_prepared
+val_set_size: 0.0
+output_dir: ./outputs/out
+
+sequence_len: 2048
+sample_packing: true
+pad_to_sequence_len: true
+
+wandb_project:
+wandb_entity:
+wandb_watch:
+wandb_name:
+wandb_log_model:
+
+gradient_accumulation_steps: 8
+micro_batch_size: 1
+num_epochs: 1
+optimizer: adamw_torch
+lr_scheduler: cosine
+learning_rate: 2e-5
+
+train_on_inputs: false
+group_by_length: false
+bf16: auto
+fp16:
+tf32: false
+
+gradient_checkpointing: true
+gradient_checkpointing_kwargs:
+  use_reentrant: false
+early_stopping_patience:
+resume_from_checkpoint:
+logging_steps: 1
+xformers_attention:
+flash_attention: true
+
+warmup_steps: 100
+evals_per_epoch: 2
+eval_table_size:
+saves_per_epoch: 1
+debug:
+deepspeed:
+weight_decay: 0.0
+special_tokens:
+fsdp:
+  - full_shard
+  - auto_wrap
+fsdp_config:
+  fsdp_limit_all_gathers: true
+  fsdp_sync_module_states: true
+  fsdp_offload_params: true
+  fsdp_use_orig_params: false
+  fsdp_cpu_ram_efficient_loading: true
+  fsdp_auto_wrap_policy: TRANSFORMER_BASED_WRAP
+  fsdp_transformer_layer_cls_to_wrap: DeepseekV2DecoderLayer
+  fsdp_state_dict_type: FULL_STATE_DICT
+  fsdp_sharding_strategy: FULL_SHARD

src/axolotl/monkeypatch/multipack.py

@@ -94,3 +94,5 @@ def patch_remote(model_name, config_name, modeling_name):
     module_name = model_config.__class__.__module__.replace(config_name, modeling_name)
     modeling_arch = importlib.import_module(module_name)
     modeling_arch._get_unpad_data = get_unpad_data  # pylint: disable=protected-access
+    # workaround to make the patch stick
+    modeling_arch._axolotl_multipack_patch = True  # pylint: disable=protected-access

src/axolotl/monkeypatch/utils.py

@@ -17,11 +17,9 @@ def get_max_seqlen_in_batch(attention_mask: torch.Tensor) -> torch.Tensor:
     max_num = int(torch.max(attention_mask).item())
     batch_size, _ = attention_mask.shape
     counts = torch.zeros((batch_size, max_num), dtype=torch.int32)
-
     for i in range(1, max_num + 1):
         mask = attention_mask == i
         counts[:, i - 1] = torch.sum(mask, dim=-1).to(dtype=torch.int32)
-
     result = counts.flatten()
     nonzero_indices = torch.nonzero(result).squeeze(-1)
     return result[nonzero_indices]