fix nvfp act quantization bug

auto_round/compressors/base.py

@@ -1651,9 +1651,7 @@ def _quantize_via_rtn_blockwise(self, all_to_quantized_module_names: list[str])
                 if self.device_map is not None:
                     accelerate.hooks.remove_hook_from_submodules(block)
 
-                if (
-                    is_nv_fp(self.act_data_type) and any("nv_fp" in format_ for format_ in self.formats)
-                ) or is_static_wfp8afp8(self):
+                if is_nv_fp(self.act_data_type) or is_static_wfp8afp8(self):
                     # enable moe experts act_max automatic generation for Linear
                     set_amax_for_all_moe_layers(block, attr_name="act_max")
                 # Normalize imatrix and quantize layers
@@ -2911,11 +2909,7 @@ def _quantize_block(
         with torch.no_grad():
             unwrapper_block(block, best_params)
 
-        if (
-            is_nv_fp(self.act_data_type)
-            and hasattr(self, "formats")
-            and any("nv_fp" in format_ for format_ in self.formats)
-        ):
+        if is_nv_fp(self.act_data_type):
             # enable moe experts act_max automatic generation for WrapperWALayer
             set_amax_for_all_moe_layers(block, attr_name="orig_layer.act_max")
 

auto_round/utils.py

@@ -2481,7 +2481,7 @@ def set_nested_attr(module, attr_name: str, value):
     attrs = attr_name.split(".")
     for attr in attrs[:-1]:
         if not hasattr(module, attr):
-            raise AttributeError(f"{module} has no attribute '{attr}'")
+            return None  # No need to set act_max for fp layers
         module = getattr(module, attr)
     setattr(module, attrs[-1], value)
 
@@ -2546,7 +2546,7 @@ def set_amax_for_all_moe_layers(model: torch.nn.Module, layer_name=None, attr_na
                 # For other MoE models (like Mixtral) with iterable experts
                 try:
                     set_amax_for_uncalibrated_experts(
-                        [getattr(expert, linear_name) for expert in sub_module.experts], attr_name=attr_name
+                        [getattr(expert, linear_name, None) for expert in sub_module.experts], attr_name=attr_name
                     )
                 except AttributeError as e:
                     # Provide more helpful debugging information

test/test_cpu/test_export.py

@@ -532,6 +532,45 @@ def test_nvfp4_autoround_save_quantized(self):
         ), "Illegal NVFP4 packing name or data_type or shape"
         shutil.rmtree("./saved", ignore_errors=True)
 
+    def test_nvfp4_moe_actmax_rtn(self):
+        model_name = "/tf_dataset/auto_round/models/deepseek-ai/DeepSeek-V2-Lite"
+        layer_config = {
+            "self_attn": {"bits": 16, "act_bits": 16},
+            "mlp.shared_experts": {"bits": 16, "act_bits": 16},
+        }
+        scheme = "nvfp4"
+        autoround = AutoRound(
+            model_name,
+            scheme=scheme,
+            iters=0,
+            seqlen=2,
+            nsamples=2,
+            dataset=self.llm_dataloader,
+            layer_config=layer_config,
+        )
+        compressed_model, _ = autoround.quantize()
+        assert hasattr(compressed_model.model.layers[1].mlp.experts[0].gate_proj.orig_layer, "act_max")
+
+    def test_nvfp4_moe_actmax_ar(self):
+        model_name = "/tf_dataset/auto_round/models/deepseek-ai/DeepSeek-V2-Lite"
+        layer_config = {
+            "q_proj": {"bits": 16, "act_bits": 16},
+            "mlp.shared_experts": {"bits": 16, "act_bits": 16},
+            "experts.*2": {"bits": 16, "act_bits": 16},
+            "experts.*5": {"bits": 16, "act_bits": 16},
+        }
+        scheme = "nvfp4"
+        autoround = AutoRound(
+            model_name,
+            scheme=scheme,
+            iters=1,
+            seqlen=2,
+            nsamples=2,
+            dataset=self.llm_dataloader,
+            layer_config=layer_config,
+        )
+        autoround.quantize_and_save(output_dir=self.save_dir, inplace=True, format="auto_round")
+
 
 if __name__ == "__main__":
     unittest.main()

test/test_cuda/test_export.py

@@ -402,6 +402,36 @@ def test_nvfp4_llmcompressor_format(self):
         #     if "France" in prompt:
         #         assert "Paris" in generated_text
 
+    def test_nvfp4_moe_actmax_rtn(self):
+        model_name = "/data0/deepseek-ai/DeepSeek-V2-Lite"
+        scheme = "nvfp4"
+        autoround = AutoRound(
+            model_name,
+            scheme=scheme,
+            iters=0,
+            seqlen=2,
+            nsamples=2,
+            dataset=self.llm_dataloader,
+        )
+        autoround.quantize()
+        quantized_model_path = self.save_dir
+        autoround.save_quantized(output_dir=quantized_model_path, inplace=False, format="auto_round")
+
+    def test_nvfp4_moe_actmax_ar(self):
+        model_name = "/data0/deepseek-ai/DeepSeek-V2-Lite"
+        scheme = "nvfp4"
+        autoround = AutoRound(
+            model_name,
+            scheme=scheme,
+            iters=1,
+            seqlen=2,
+            nsamples=2,
+            dataset=self.llm_dataloader,
+        )
+        autoround.quantize()
+        quantized_model_path = self.save_dir
+        autoround.save_quantized(output_dir=quantized_model_path, inplace=False, format="auto_round")
+
 
 if __name__ == "__main__":
     unittest.main()