optimize npu qwen2 (#12107)

Author: rnwang04

python/llm/src/ipex_llm/transformers/npu_models/mp_models_base.py

@@ -399,22 +399,22 @@ def set_weights_async(self, op_id, weights):
         self.setWeights(offset, op_id, *weights)
 
     @staticmethod
-    def run_decoders(inputs, decoders):
+    def run_decoders(inputs, decoders, models_ptr=None):
         x_np = [elem.to(torch.float16).numpy() for elem in inputs]
 
         num_decoders = len(decoders)
         num_inputs = len(x_np)
 
-        with record_function(f"npu_factory"):
-
+        if models_ptr is None:
             array_type = ctypes.POINTER(ctypes.c_char) * num_decoders
             models_ptr = array_type(
                 *[decoders[i]._mm for i in range(num_decoders)]
             )
-            inputs_ptr = (ctypes.c_void_p * num_inputs)(
-                *[x.ctypes.data_as(ctypes.c_void_p) for x in x_np]
-            )
-            backend_lib.run_decoders(models_ptr, inputs_ptr, num_decoders, num_inputs)
+
+        inputs_ptr = (ctypes.c_void_p * num_inputs)(
+            *[x.ctypes.data_as(ctypes.c_void_p) for x in x_np]
+        )
+        backend_lib.run_decoders(models_ptr, inputs_ptr, num_decoders, num_inputs)
 
         hidden_states = decoders[-1].torch_out[0]
         new_key_states = []

python/llm/src/ipex_llm/transformers/npu_models/qwen2_mp.py

@@ -17,7 +17,7 @@
 import os
 import torch
 import time
-
+import ctypes
 from typing import Optional, Sequence, List, Union, Any, Tuple
 import numpy as np
 
@@ -379,6 +379,9 @@ def __init__(
             self.backend_decoders[i].set_weights(self.op_id, curr_parameters)
             offset = offset + curr_linear_ops
 
+        array_type = ctypes.POINTER(ctypes.c_char) * intra_stages
+        self.models_ptr = array_type(*[self.backend_decoders[i]._mm for i in range(intra_stages)])
+
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -402,7 +405,8 @@ def forward(
 
         hidden_states, new_keys, new_values = LowBitQwenMultiDecoderlayer.run_decoders(
             inputs,
-            decoders=self.backend_decoders)
+            self.backend_decoders,
+            self.models_ptr)
 
         if self.do_print:
             print("outputs:", hidden_states)