update mlp of llama (#11897)

* update mlp of llama

* relax threshold of  mlp test

* revert code

python/llm/src/ipex_llm/transformers/models/llama.py

@@ -305,6 +305,16 @@ def llama_mlp_forward(
             )
             hidden_states = attn_output.view(x.shape)
         return hidden_states
+    elif x.device.type == "xpu" and not self.training:
+        import xe_addons
+        gate = self.gate_proj(x)
+        up = self.up_proj(x)
+        xe_addons.mlp_silu_mul_inplaced(gate, up)
+        out = self.down_proj(gate)
+        if residual is not None:
+            return out + residual
+        else:
+            return out
     else:
         a = self.act_fn(self.gate_proj(x))
         b = self.up_proj(x)

python/llm/test/inference_gpu/test_transformers_api_mlp.py

@@ -134,7 +134,7 @@ class Test_Optimize_Gpu_Model:
         # currently only compare the output of the last mlp layer.
         layer_before_MLP = "model.layers.31.post_attention_layernorm"
         MLP_layer = "model.layers.31.mlp"
-        lower_bound = 0
+        lower_bound = 1e-3
         self.run_optimize_gpu_model(Name, Model, Tokenizer, model_path, MLP_layer, layer_before_MLP, lower_bound)
 
     def Llama2_7B_gpu_model(self, Name, Model, Tokenizer, model_path):