remove unused code (#12635)

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

@@ -29,7 +29,7 @@ from ipex_llm.transformers.models.utils import use_quantize_kv_cache, restore_fp
     should_use_compresskv
 from ipex_llm.transformers.models.utils import update_past_key_value
 from ipex_llm.transformers.models.utils import should_use_fuse_rope
-from ipex_llm.transformers.models.utils import use_flash_attention, use_sdp
+from ipex_llm.transformers.models.utils import use_sdp
 from ipex_llm.transformers.models.utils import apply_rotary_pos_emb, SILU
 from ipex_llm.transformers.models.utils import mlp_fusion_check
 from ipex_llm.transformers.models.utils import is_enough_kv_cache_room_4_36
@@ -301,12 +301,6 @@ def baichuan_attention_forward_7b(
 
     # IPEX-LLM OPT: sdp
     attn_weights = None
-    if use_flash_attention(query_states, key_states, attention_mask):
-        attn_output = F.scaled_dot_product_attention(query_states.to(dtype=torch.float16),
-                                                     key_states.to(dtype=torch.float16),
-                                                     value_states.to(dtype=torch.float16),
-                                                     is_causal=True).to(hidden_states.dtype)
-    else:
     attn_output = scaled_dot_product_attention(
         query_states, key_states, value_states,
         attention_mask, q_len == kv_seq_len

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

@@ -23,7 +23,7 @@ import torch.utils.checkpoint
 import torch.nn.functional as F
 from typing import Optional, Tuple
 from ipex_llm.transformers.models.utils import init_kv_cache, extend_kv_cache, append_kv_cache
-from ipex_llm.transformers.models.utils import use_flash_attention, use_sdp
+from ipex_llm.transformers.models.utils import use_sdp
 
 
 def rotate_half(x):
@@ -41,7 +41,7 @@ def apply_rotary_pos_emb_index(q, k, cos, sin, position_id):
 
 
 def glm_sdpa(query, key, value, attention_mask=None, is_causal=False):
-    if use_flash_attention(query, key, attention_mask) or query.device.type == 'cpu':
+    if query.device.type == 'cpu':
         context_layer = F.scaled_dot_product_attention(query.to(key.dtype),
                                                        key,
                                                        value,

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

@@ -33,7 +33,6 @@ from ipex_llm.transformers.models.utils import update_past_key_value, should_use
 from ipex_llm.transformers.models.utils import use_quantize_kv_cache
 from ipex_llm.transformers.models.utils import rotate_half, SILU
 from ipex_llm.transformers.models.utils import mlp_fusion_check
-from ipex_llm.transformers.models.utils import use_flash_attention
 from ipex_llm.utils.common import invalidInputError
 from transformers.modeling_outputs import BaseModelOutputWithPast
 
@@ -116,14 +115,9 @@ def qwen_attention_forward(
     past_key_value = (key_states.transpose(1, 2),
                       value_states.transpose(1, 2)) if use_cache else None
 
-    # IPEX-LLM OPT: sdp
+    # IPEX-LLM OPT: sdpa
     attn_weights = None
-    if use_flash_attention(query_states, key_states, attention_mask):
+
-        attn_output = F.scaled_dot_product_attention(query_states.to(dtype=torch.float16),
-                                                     key_states.to(dtype=torch.float16),
-                                                     value_states.to(dtype=torch.float16),
-                                                     is_causal=True).to(hidden_states.dtype)
-    else:
     if q_len > 1 and q_len != kv_seq_len:
         causal_mask = torch.tril(
             torch.ones((kv_seq_len, kv_seq_len), dtype=torch.bool, device=query_states.device)
@@ -219,15 +213,9 @@ def qwen_attention_forward_registered(
     past_key_value = (key_states.transpose(1, 2),
                       value_states.transpose(1, 2)) if use_cache else None
 
-    # IPEX-LLM OPT: sdp
+    # IPEX-LLM OPT: sdpa
     attn_weights = None
 
-    if use_flash_attention(query_states, key_states, attention_mask):
-        attn_output = F.scaled_dot_product_attention(query_states.to(dtype=torch.float16),
-                                                     key_states.to(dtype=torch.float16),
-                                                     value_states.to(dtype=torch.float16),
-                                                     is_causal=True).to(hidden_states.dtype)
-    else:
     if q_len > 1 and q_len != kv_seq_len:
         causal_mask = registered_causal_mask[
             :, :, kv_seq_len - q_len:kv_seq_len, :kv_seq_len

python/llm/src/ipex_llm/transformers/models/qwen2.py

@@ -38,12 +38,10 @@
 #
 
 import os
-import math
 from typing import Optional, Tuple, Union, List
 
 import torch
 from torch.nn import CrossEntropyLoss
-from torch.nn.functional import scaled_dot_product_attention as sdpa
 
 from ipex_llm.transformers.models.common import merge_qkv_base
 from ipex_llm.transformers.models.common import scaled_dot_product_attention
@@ -51,13 +49,12 @@ from ipex_llm.transformers.models.utils import SILU, mlp_fusion_check
 from ipex_llm.transformers.models.utils import should_use_fuse_rope
 from ipex_llm.transformers.models.utils import use_quantize_kv_cache, \
     should_use_compresskv, is_enough_kv_cache_room_4_36
-from ipex_llm.transformers.models.utils import use_flash_attention
 from ipex_llm.transformers.kv import DynamicFp8Cache, DynamicNormalCache, \
     DynamicCompressCache, DynamicCompressFp8Cache
 from ipex_llm.utils.common import invalidInputError
 
 from transformers.models.qwen2.modeling_qwen2 import Qwen2Attention, Qwen2MLP
-from transformers.models.qwen2.modeling_qwen2 import apply_rotary_pos_emb, repeat_kv
+from transformers.models.qwen2.modeling_qwen2 import apply_rotary_pos_emb
 from transformers.modeling_outputs import BaseModelOutputWithPast, CausalLMOutputWithPast
 from transformers.cache_utils import Cache
 from transformers import logging
@@ -580,17 +577,6 @@ def qwen2_attention_forward(
                                                              self.layer_idx, None)
 
     attn_weights = None
-    if use_flash_attention(query_states, key_states, attention_mask):
-        if attention_mask is not None:
-            attention_mask = attention_mask[:, :, :, :kv_seq_len]
-        # repeat k/v heads if n_kv_heads < n_heads
-        key_states = repeat_kv(key_states, self.num_key_value_groups)
-        value_states = repeat_kv(value_states, self.num_key_value_groups)
-        attn_output = sdpa(query_states.to(device, dtype=torch.float16),
-                           key_states.to(device, dtype=torch.float16),
-                           value_states.to(device, dtype=torch.float16),
-                           is_causal=True).to(hidden_states.dtype)
-    else:
     attn_output = scaled_dot_product_attention(
         query_states, key_states, value_states,
         attention_mask, q_len == kv_seq_len