Merge pull request #40 from ldh2020/v0.11.0dev

[Kernel] Optimize the performance of Qwen3-Next

vllm_kunlun/models/qwen3_next.py

@@ -3,7 +3,7 @@
 """Inference-only Qwen3Next model."""
 from collections.abc import Iterable
 from itertools import islice
-from typing import Optional
+from typing import Optional, Union
 
 import torch
 import torch.nn.functional as F
@@ -69,10 +69,8 @@ from vllm.model_executor.models.utils import (AutoWeightsLoader, PPMissingLayer,
                     maybe_prefix)
 from vllm_kunlun.ops.activation import SiluAndMul
 from vllm_kunlun.ops._kunlun_ops import KunlunOps as ops
-
-
-from typing import Optional, Union
 from vllm.model_executor.layers.vocab_parallel_embedding import get_masked_input_and_mask
+import xtorch_ops
 
 
 @torch.compile(dynamic=True, backend="aot_eager")
@@ -613,12 +611,17 @@ class Qwen3NextGatedDeltaNet(nn.Module, MambaBase):
 
         # 3.2: process the remaining part
         if attn_metadata.num_prefills > 0:
-            initial_state = ssm_state[
-                non_spec_state_indices_tensor].contiguous()
-            initial_state[~has_initial_state, ...] = 0
-            if self.num_v_heads // self.num_k_heads > 1:
-                query_non_spec = query_non_spec.repeat_interleave(self.num_v_heads // self.num_k_heads, dim=2)
-                key_non_spec = key_non_spec.repeat_interleave(self.num_v_heads // self.num_k_heads, dim=2)
+            if non_spec_state_indices_tensor.shape[0] > 100:
+                initial_state = ssm_state[
+                    non_spec_state_indices_tensor].contiguous()
+            else:
+                initial_state_shape = non_spec_state_indices_tensor.shape + ssm_state.shape[1: ]
+                initial_state = torch.empty(initial_state_shape, dtype=ssm_state.dtype, device=ssm_state.device)
+                for i in range(non_spec_state_indices_tensor.shape[0]):
+                    initial_state[i] = ssm_state[non_spec_state_indices_tensor[i]]
+            
+            initial_state = initial_state * has_initial_state.view(has_initial_state.shape[0], 1, 1, 1)
+            initial_state = initial_state.transpose(-1, -2).contiguous()
             (
                 core_attn_out_non_spec,
                 last_recurrent_state,
@@ -634,8 +637,15 @@ class Qwen3NextGatedDeltaNet(nn.Module, MambaBase):
                 cu_seqlens=non_spec_query_start_loc,
             )
             # Init cache
-            ssm_state[non_spec_state_indices_tensor] = last_recurrent_state.to(
-                ssm_state.dtype)
+            last_recurrent_state = last_recurrent_state.transpose(-1, -2).contiguous().to(ssm_state.dtype).view(
+                                    last_recurrent_state.shape[0], -1, last_recurrent_state.shape[-1])
+            cast_ssm_state = ssm_state.view(ssm_state.shape[0], 1, -1, ssm_state.shape[-1])
+            xtorch_ops.reshape_and_cache_flash(
+                                last_recurrent_state,
+                                last_recurrent_state,
+                                cast_ssm_state,
+                                cast_ssm_state,
+                                non_spec_state_indices_tensor)
         elif attn_metadata.num_decodes > 0:
             core_attn_out_non_spec, last_recurrent_state = (
                 fused_recurrent_gated_delta_rule(

vllm_kunlun/ops/fla/fused_recurrent.py

@@ -44,6 +44,7 @@ class FusedRecurrentFunction(torch.autograd.Function):
             h0_indices=ssm_state_indices,
             num_accepted_tokens=num_accepted_tokens,
             use_qk_l2norm_in_kernel=use_qk_l2norm_in_kernel,
+            is_h0_transposed=True
         )
         return o, final_state
 
@@ -150,4 +151,4 @@ def fused_recurrent_gated_delta_rule(
         num_accepted_tokens,
         use_qk_l2norm_in_kernel,
     )
-    return o, final_state
+    return o, final_state

vllm_kunlun/v1/attention/backends/kunlun_attn.py

@@ -673,6 +673,12 @@ class KunlunAttentionImpl(AttentionImpl[KunlunMetadata]):
         if prefill_meta := attn_metadata.prefill_metadata:
             # Prompt run.
             prefill_query = query[num_decode_tokens:attn_metadata.num_actual_tokens]
+
+            if key_cache.is_contiguous():
+                tmp_block_tables = prefill_meta.block_tables
+            else:
+                tmp_block_tables = prefill_meta.block_tables * 2 # only test in Qwen3-Next
+            
             xtorch_ops.prefill_attention(
                 q=prefill_query,
                 k=key_cache, # Key Cache (block_num, head, block_size, dim)
@@ -680,7 +686,7 @@ class KunlunAttentionImpl(AttentionImpl[KunlunMetadata]):
                 out=output[num_decode_tokens:attn_metadata.num_actual_tokens],
                 is_causal=True,
                 is_prefix_cache=True, 
-                block_table=prefill_meta.block_tables, 
+                block_table=tmp_block_tables, 
                 context_qlen_lod_cpu=prefill_meta.query_start_loc_host,
                 context_qlen_lod_xpu=prefill_meta.query_start_loc,
                 context_kvlen_lod_cpu=prefill_meta.kv_lod_cpu,
@@ -782,4 +788,4 @@ def use_cascade_attention(
     flash_decoding_time = cdiv(flash_decoding_ctas, num_sms)
 
     # Use cascade attention if it is faster than FlashDecoding.
-    return cascade_time < flash_decoding_time
+    return cascade_time < flash_decoding_time