add preliminary fp8 support

src/axolotl/core/trainers/base.py

@@ -562,13 +562,16 @@ class AxolotlTrainer(
 
         return res
 
-    def override_accelerator_args(self, **kwargs):  # pylint: disable=unused-argument
+    def additional_accelerator_args(
+        self, fp8=None, **kwargs
+    ):  # pylint: disable=unused-argument
         ret_kwargs = {}
-        if os.environ.get("ACCELERATE_MIXED_PRECISION") == "fp8":
+        if fp8:
             from accelerate.utils import AORecipeKwargs
 
             ret_kwargs["mixed_precision"] = "fp8"
             ret_kwargs["kwargs_handlers"] = [AORecipeKwargs()]
+            os.environ["ACCELERATE_MIXED_PRECISION"] = "fp8"
 
         return ret_kwargs
 

src/axolotl/integrations/liger/models/llama4.py

@@ -45,7 +45,7 @@ def lce_forward(
     Returns:
     """
 
-    print("=" * 30 + " lce_forward " + "=" * 30)
+    # pylint: disable=duplicate-code
     output_attentions = (
         output_attentions
         if output_attentions is not None

src/axolotl/monkeypatch/trainer_accelerator_args.py

@@ -17,8 +17,8 @@ ORIGINAL_TRAINER_CODE = """
 """
 
 PATCHED_TRAINER_CODE = """
-    if hasattr(self, "override_accelerator_args"):
+    if hasattr(self, "additional_accelerator_args"):
-        additional_args = self.override_accelerator_args(**args)
+        additional_args = self.additional_accelerator_args(fp8=True, **args)
         if additional_args:
             args.update(additional_args)
 

src/axolotl/utils/models.py

@@ -558,11 +558,12 @@ class ModelLoader:
         plugin_manager.pre_model_load(self.cfg)
 
         # monkey patch to allow additional Accelerator init kwargs
-        from axolotl.monkeypatch.trainer_accelerator_args import (
+        if self.cfg.fp8:
-            patch_create_accelerate_code_for_fp8,
+            from axolotl.monkeypatch.trainer_accelerator_args import (
-        )
+                patch_create_accelerate_code_for_fp8,
+            )
 
-        patch_create_accelerate_code_for_fp8()
+            patch_create_accelerate_code_for_fp8()
 
         if self.cfg.adapter:
             from axolotl.monkeypatch.transformers_fa_utils import (

src/axolotl/utils/schemas/config.py

@@ -169,6 +169,7 @@ class AxolotlInputConfig(
 
     bf16: Literal["auto"] | bool | None = "auto"
     fp16: bool | None = None
+    fp8: bool | None = None
     bfloat16: bool | None = None  # for non-AMP cases
     float16: bool | None = None  # for non-AMP cases
     tf32: bool | None = None