Update get_unpad_data patching for multipack (#2013)

* Update `get_unpad_data` patching for multipack

* Update src/axolotl/utils/models.py

* Update src/axolotl/utils/models.py

* Add test case

---------

Co-authored-by: Wing Lian <wing.lian@gmail.com>
Co-authored-by: Wing Lian <wing@axolotl.ai>

src/axolotl/monkeypatch/multipack.py

@@ -1,4 +1,5 @@
 """multipack patching for v2 of sample packing"""
+
 import importlib
 
 import transformers
@@ -27,71 +28,28 @@ SUPPORTED_MULTIPACK_MODEL_TYPES = [
 ]
 
 
-def patch_for_multipack(model_type, model_name=None, is_remote_code=False):
-    if model_type == "gemmoe":
-        patch_remote(model_name, ".configuration_gemmoe", ".modeling_gemmoe")
-    elif model_type == "deepseek_v2":
-        patch_remote(model_name, ".configuration_deepseek", ".modeling_deepseek")
-    elif hasattr(transformers, "modeling_flash_attention_utils") and not is_remote_code:
+def patch_for_multipack(model_type, model_name=None, has_remote_code=False):
+    if has_remote_code:
+        patch_remote(model_name)
+    elif hasattr(transformers, "modeling_flash_attention_utils"):
         transformers.modeling_flash_attention_utils._get_unpad_data = (  # pylint: disable=protected-access
             get_unpad_data
         )
-        if model_type == "mixtral" and is_deepspeed_zero3_enabled():
-            patch_mixtral_moe_forward_zero3()
-        return
 
-    # retain for legacy
-    if model_type == "mixtral":
-        transformers.models.mixtral.modeling_mixtral._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-        if is_deepspeed_zero3_enabled():
-            patch_mixtral_moe_forward_zero3()
-    elif model_type == "llama":
-        if hasattr(transformers.models.llama.modeling_llama, "_get_unpad_data"):
-            transformers.models.llama.modeling_llama._get_unpad_data = (  # pylint: disable=protected-access
-                get_unpad_data
-            )
-    elif model_type == "mistral":
-        if hasattr(transformers.models.mistral.modeling_mistral, "_get_unpad_data"):
-            transformers.models.llama.modeling_llama._get_unpad_data = (  # pylint: disable=protected-access
-                get_unpad_data
-            )
-    elif model_type == "qwen2":
-        transformers.models.qwen2.modeling_qwen2._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-    elif model_type == "qwen2_moe":
-        transformers.models.qwen2_moe.modeling_qwen2_moe._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-    elif model_type == "falcon":
-        transformers.models.falcon.modeling_falcon._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-    elif model_type == "phi":
-        transformers.models.phi.modeling_phi._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-    elif model_type == "gemma":
-        transformers.models.gemma.modeling_gemma._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-    elif model_type == "gemma2":
-        transformers.models.gemma2.modeling_gemma2._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
-    elif model_type == "starcoder2":
-        transformers.models.starcoder2.modeling_starcoder2._get_unpad_data = (  # pylint: disable=protected-access
-            get_unpad_data
-        )
+    if model_type == "mixtral" and is_deepspeed_zero3_enabled():
+        patch_mixtral_moe_forward_zero3()
 
 
-def patch_remote(model_name, config_name, modeling_name):
+def patch_remote(model_name):
     model_config = AutoConfig.from_pretrained(model_name, trust_remote_code=True)
     # we need to load the model here in order for modeling_* to be available
     with init_empty_weights():
         AutoModelForCausalLM.from_pretrained(model_name, trust_remote_code=True)
-    module_name = model_config.__class__.__module__.replace(config_name, modeling_name)
+    parts = model_config.__class__.__module__.split(".")
+    parts[-1] = parts[-1].replace("configuration_", "modeling_", 1)
+    module_name = ".".join(parts)
     modeling_arch = importlib.import_module(module_name)
-    modeling_arch._get_unpad_data = get_unpad_data  # pylint: disable=protected-access
+    if hasattr(modeling_arch, "_get_unpad_data"):
+        modeling_arch._get_unpad_data = (  # pylint: disable=protected-access
+            get_unpad_data
+        )

src/axolotl/utils/models.py

@@ -395,10 +395,17 @@ class ModelLoader:
             and self.cfg.flash_attention
             and self.cfg.sample_packing
         ):
+            has_remote_code = (
+                "auto_map" in self.model_config
+                and "AutoModelForCausalLM" in self.model_config["auto_map"]
+            )
+            if has_remote_code and self.cfg.trust_remote_code is False:
+                # if explicitly set in the YAML, we should prefer that, for example if explicitly disabled
+                has_remote_code = self.cfg.trust_remote_code
             patch_for_multipack(
                 self.cfg.model_config_type,
                 model_name=self.cfg.base_model,
-                is_remote_code=self.cfg.trust_remote_code,
+                has_remote_code=has_remote_code,
             )
 
             if self.cfg.is_llama_derived_model:

tests/e2e/test_llama.py

@@ -0,0 +1,66 @@
+"""
+E2E tests for llama
+"""
+
+import logging
+import os
+import unittest
+from pathlib import Path
+
+from axolotl.cli import load_datasets
+from axolotl.common.cli import TrainerCliArgs
+from axolotl.train import train
+from axolotl.utils.config import normalize_config
+from axolotl.utils.dict import DictDefault
+
+from .utils import with_temp_dir
+
+LOG = logging.getLogger("axolotl.tests.e2e")
+os.environ["WANDB_DISABLED"] = "true"
+
+
+class TestLlama(unittest.TestCase):
+    """
+    Test case for Llama models
+    """
+
+    @with_temp_dir
+    def test_fft_trust_remote_code(self, temp_dir):
+        # pylint: disable=duplicate-code
+        cfg = DictDefault(
+            {
+                "base_model": "JackFram/llama-68m",
+                "tokenizer_type": "LlamaTokenizer",
+                "trust_remote_code": True,
+                "sequence_len": 512,
+                "val_set_size": 0.1,
+                "special_tokens": {
+                    "unk_token": "<unk>",
+                    "bos_token": "<s>",
+                    "eos_token": "</s>",
+                },
+                "datasets": [
+                    {
+                        "path": "mhenrichsen/alpaca_2k_test",
+                        "type": "alpaca",
+                    },
+                ],
+                "num_epochs": 1,
+                "micro_batch_size": 8,
+                "gradient_accumulation_steps": 1,
+                "output_dir": temp_dir,
+                "learning_rate": 0.00001,
+                "optimizer": "adamw_bnb_8bit",
+                "lr_scheduler": "cosine",
+                "flash_attention": True,
+                "sample_packing": True,
+                "bf16": True,
+                "save_safetensors": True,
+            }
+        )
+        normalize_config(cfg)
+        cli_args = TrainerCliArgs()
+        dataset_meta = load_datasets(cfg=cfg, cli_args=cli_args)
+
+        train(cfg=cfg, cli_args=cli_args, dataset_meta=dataset_meta)
+        assert (Path(temp_dir) / "model.safetensors").exists()