Qwen3.6-27B iluvatar bi-v100 adaptation

Dockerfile

@@ -1,15 +1,6 @@
 FROM git.modelhub.org.cn:9443/enginex-iluvatar/bi100-3.2.3-x86-ubuntu20.04-py3.10-poc-llm-infer:v1.2.3
 
-RUN pip install --no-cache-dir triton==2.1.0
-
-COPY pkgs/triton /usr/local/corex/lib64/python3/dist-packages/triton
-COPY pkgs/triton-2.1.0+corex.4.1.2.dist-info /usr/local/corex/lib64/python3/dist-packages/triton-2.1.0+corex.4.1.2.dist-info
-
-COPY paged_attn.py /usr/local/corex/lib64/python3/dist-packages/vllm/attention/ops/paged_attn.py
-COPY __init__.py /usr/local/corex/lib64/python3/dist-packages/vllm/triton_utils/__init__.py
-
 RUN mkdir /workspace
 WORKDIR /workspace/
-
-COPY ./launch_service /workspace/launch_service
-
+COPY ./qwen3_6_scripts /workspace/qwen3_6_scripts
+RUN cd ./qwen3_6_scripts && ./patch_ops.sh

README_qwen3_6.md

@@ -0,0 +1,42 @@
+# 天数智芯 天垓100 文本生成引擎（基于 vLLM 优化适配Qwen3.6-27B）
+
+```
+# 本地构建
+docker build -t enginex-iluvatar-vllm:bi100-qwen3.6 -f Dockerfile .
+```
+
+
+启动容器镜像
+
+下载Qwen3.6-27B模型，并且需要将模型的config.json文件中architectures字段改成
+```json
+"architectures": [
+        "Qwen3_5ForCausalLM"
+    ]
+```
+
+```bash
+docker run -dit --network=host --ipc=host \
+  -v /usr/src:/usr/src -v /lib/modules:/lib/modules -v /dev:/dev --privileged \
+  --name vllm-iluvatar \
+  -v /mnt/models/Qwen3.6-27B:/model:ro --entrypoint=python3 \
+  enginex-iluvatar-vllm:bi100 \
+  -m vllm.entrypoints.openai.api_server \
+  --model /model --port 1111 --served-model-name llm \
+  --max-model-len 10000 --enforce-eager --trust-remote-code -tp 4 --gpu-memory-utilization 0.95
+```
+
+请求
+```bash
+curl http://localhost:1111/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "llm",
+    "messages": [
+      {"role": "system", "content": "You are a helpful assistant."},
+      {"role": "user", "content": "Can you tell me the story of Snow White?"}
+    ],
+    "max_tokens": 200,
+    "temperature": 0.7
+  }'
+```

qwen3_6_scripts/mamba_cache.py

@@ -0,0 +1,224 @@
+from typing import Dict, List, Optional
+
+import torch
+
+from vllm.attention.backends.abstract import AttentionMetadata
+
+
+class MambaCacheManager:
+
+    def __init__(self, dtype, num_mamba_layers, max_batch_size,
+                 conv_state_shape, temporal_state_shape):
+
+        conv_state = torch.empty(size=(num_mamba_layers, max_batch_size) +
+                                 conv_state_shape,
+                                 dtype=dtype,
+                                 device="cuda")
+        temporal_state = torch.zeros(size=(num_mamba_layers, max_batch_size) +
+                                     temporal_state_shape,
+                                     dtype=dtype,
+                                     device="cuda")
+
+        self.mamba_cache = (conv_state, temporal_state)
+
+        # Maps between the request id and a dict that maps between the seq_id
+        # and its index inside the self.mamba_cache
+        self.mamba_cache_indices_mapping: Dict[str, Dict[int, int]] = {}
+
+    def current_run_tensors(self, input_ids: torch.Tensor,
+                            attn_metadata: AttentionMetadata, **kwargs):
+        """
+        Return the tensors for the current run's conv and ssm state.
+        """
+        if "seqlen_agnostic_capture_inputs" not in kwargs:
+            # We get here only on Prefill/Eager mode runs
+            request_ids_to_seq_ids = kwargs["request_ids_to_seq_ids"]
+            finished_requests_ids = kwargs["finished_requests_ids"]
+
+            self._release_finished_requests(finished_requests_ids)
+            mamba_cache_tensors = self._prepare_current_run_mamba_cache(
+                request_ids_to_seq_ids, finished_requests_ids)
+
+        else:
+            # CUDA graph capturing runs
+            mamba_cache_tensors = kwargs["seqlen_agnostic_capture_inputs"]
+
+        return mamba_cache_tensors
+
+    def copy_inputs_before_cuda_graphs(self, input_buffers, **kwargs):
+        """
+        Copy the relevant Mamba cache into the CUDA graph input buffer
+        that was provided during the capture runs
+        (JambaForCausalLM.mamba_gc_cache_buffer).
+        """
+        assert all(
+            key in kwargs
+            for key in ["request_ids_to_seq_ids", "finished_requests_ids"])
+        finished_requests_ids = kwargs["finished_requests_ids"]
+        request_ids_to_seq_ids = kwargs["request_ids_to_seq_ids"]
+
+        self._release_finished_requests(finished_requests_ids)
+        self._prepare_current_run_mamba_cache(request_ids_to_seq_ids,
+                                              finished_requests_ids)
+
+    def get_seqlen_agnostic_capture_inputs(self, batch_size: int):
+        """
+        Provide the CUDA graph capture runs with a buffer in adjusted size.
+        The buffer is used to maintain the Mamba Cache during the CUDA graph
+        replay runs.
+        """
+        return tuple(buffer[:, :batch_size] for buffer in self.mamba_cache)
+
+    def _swap_mamba_cache(self, from_index: int, to_index: int):
+        assert len(self.mamba_cache) > 0
+        for cache_t in self.mamba_cache:
+            cache_t[:, [to_index,from_index]] = \
+             cache_t[:, [from_index,to_index]]
+
+    def _copy_mamba_cache(self, from_index: int, to_index: int):
+        assert len(self.mamba_cache) > 0
+        for cache_t in self.mamba_cache:
+            cache_t[:, to_index].copy_(cache_t[:, from_index],
+                                       non_blocking=True)
+
+    def _move_out_if_already_occupied(self, index: int,
+                                      all_occupied_indices: List[int]):
+        if index in all_occupied_indices:
+            first_free_index = self._first_free_index_in_mamba_cache()
+            # In case occupied, move the occupied to a new empty block
+            self._move_cache_index_and_mappings(from_index=index,
+                                                to_index=first_free_index)
+
+    def _assign_seq_id_to_mamba_cache_in_specific_dest(self, cur_rid: str,
+                                                       seq_id: int,
+                                                       destination_index: int):
+        """
+        Assign (req_id,seq_id) pair to a `destination_index` index, if
+        already occupied, move the occupying index to a free index.
+        """
+        all_occupied_indices = self._get_all_occupied_indices()
+        if cur_rid not in self.mamba_cache_indices_mapping:
+            self._move_out_if_already_occupied(
+                index=destination_index,
+                all_occupied_indices=all_occupied_indices)
+            for cache_t in self.mamba_cache:
+                cache_t[:, destination_index].zero_()
+            self.mamba_cache_indices_mapping[cur_rid] = {
+                seq_id: destination_index
+            }
+        elif seq_id not in (seq_ids2indices :=
+                            self.mamba_cache_indices_mapping[cur_rid]):
+            # parallel sampling , where n > 1, assume prefill have
+            # already happened now we only need to copy the already
+            # existing cache into the siblings seq_ids caches
+            self._move_out_if_already_occupied(
+                index=destination_index,
+                all_occupied_indices=all_occupied_indices)
+            index_exists = list(seq_ids2indices.values())[0]
+            # case of decoding n>1, copy prefill cache to decoding indices
+            self._copy_mamba_cache(from_index=index_exists,
+                                   to_index=destination_index)
+            self.mamba_cache_indices_mapping[cur_rid][
+                seq_id] = destination_index
+        else:
+            # already exists
+            cache_index_already_exists = self.mamba_cache_indices_mapping[
+                cur_rid][seq_id]
+            if cache_index_already_exists != destination_index:
+                # In case the seq id already exists but not in
+                # the right destination, swap it with what's occupying it
+                self._swap_pair_indices_and_mappings(
+                    from_index=cache_index_already_exists,
+                    to_index=destination_index)
+
+    def _prepare_current_run_mamba_cache(
+            self, request_ids_to_seq_ids: Dict[str, list[int]],
+            finished_requests_ids: List[str]):
+        running_indices = []
+        request_ids_to_seq_ids_flatten = [
+            (req_id, seq_id)
+            for req_id, seq_ids in request_ids_to_seq_ids.items()
+            for seq_id in seq_ids
+        ]
+        batch_size = len(request_ids_to_seq_ids_flatten)
+        for dest_index, (request_id,
+                         seq_id) in enumerate(request_ids_to_seq_ids_flatten):
+            if request_id in finished_requests_ids:
+                # Do not allocate cache index for requests that run
+                # and finish right after
+                continue
+            self._assign_seq_id_to_mamba_cache_in_specific_dest(
+                request_id, seq_id, dest_index)
+            running_indices.append(dest_index)
+
+        self._clean_up_first_bs_blocks(batch_size, running_indices)
+        conv_state = self.mamba_cache[0][:, :batch_size]
+        temporal_state = self.mamba_cache[1][:, :batch_size]
+
+        return (conv_state, temporal_state)
+
+    def _get_all_occupied_indices(self):
+        return [
+            cache_idx
+            for seq_ids2indices in self.mamba_cache_indices_mapping.values()
+            for cache_idx in seq_ids2indices.values()
+        ]
+
+    def _clean_up_first_bs_blocks(self, batch_size: int,
+                                  indices_for_current_run: List[int]):
+        # move out all of the occupied but currently not running blocks
+        # outside of the first n blocks
+        destination_indices = range(batch_size)
+        max_possible_batch_size = self.mamba_cache[0].shape[1]
+        for destination_index in destination_indices:
+            if destination_index in self._get_all_occupied_indices() and  \
+               destination_index not in indices_for_current_run:
+                # move not running indices outside of the batch
+                all_other_indices = list(
+                    range(batch_size, max_possible_batch_size))
+                first_avail_index = self._first_free_index_in_mamba_cache(
+                    all_other_indices)
+                self._swap_indices(from_index=destination_index,
+                                   to_index=first_avail_index)
+
+    def _move_cache_index_and_mappings(self, from_index: int, to_index: int):
+        self._copy_mamba_cache(from_index=from_index, to_index=to_index)
+        self._update_mapping_index(from_index=from_index, to_index=to_index)
+
+    def _swap_pair_indices_and_mappings(self, from_index: int, to_index: int):
+        self._swap_mamba_cache(from_index=from_index, to_index=to_index)
+        self._swap_mapping_index(from_index=from_index, to_index=to_index)
+
+    def _swap_mapping_index(self, from_index: int, to_index: int):
+        for seq_ids2index in self.mamba_cache_indices_mapping.values():
+            for seq_id, index in seq_ids2index.items():
+                if from_index == index:
+                    seq_ids2index.update({seq_id: to_index})
+                elif to_index == index:
+                    seq_ids2index.update({seq_id: from_index})
+
+    def _update_mapping_index(self, from_index: int, to_index: int):
+        for seq_ids2index in self.mamba_cache_indices_mapping.values():
+            for seq_id, index in seq_ids2index.items():
+                if from_index == index:
+                    seq_ids2index.update({seq_id: to_index})
+                    return
+
+    def _release_finished_requests(self,
+                                   finished_seq_groups_req_ids: List[str]):
+        for req_id in finished_seq_groups_req_ids:
+            if req_id in self.mamba_cache_indices_mapping:
+                self.mamba_cache_indices_mapping.pop(req_id)
+
+    def _first_free_index_in_mamba_cache(
+            self, indices_range: Optional[List[int]] = None) -> int:
+        assert self.mamba_cache is not None
+        if indices_range is None:
+            max_possible_batch_size = self.mamba_cache[0].shape[1]
+            indices_range = list(range(max_possible_batch_size))
+        all_occupied_indices = self._get_all_occupied_indices()
+        for i in indices_range:
+            if i not in all_occupied_indices:
+                return i
+        raise Exception("Couldn't find a free spot in the mamba cache! This"
+                        "should never happen")

qwen3_6_scripts/patch_ops.sh

@@ -0,0 +1,10 @@
+pip install transformers==4.55.3 -i https://pypi.tuna.tsinghua.edu.cn/simple
+cp -r ./qwen3_5 /usr/local/lib/python3.10/site-packages/transformers/models/
+python3 ./patch_transformers_qwen3_5.py
+
+cp ./mamba_cache.py /usr/local/corex/lib/python3/dist-packages/vllm/model_executor/models/
+cp ./qwen3_5.py /usr/local/corex/lib/python3/dist-packages/vllm/model_executor/models/
+python3 ./patch_vllm_qwen3_5.py
+
+# 此步骤脚本四选一（默认 matmul+seq策略）
+python3 ./patch_xformers_sdpa_seq.py

qwen3_6_scripts/patch_transformers_qwen3_5.py

@@ -0,0 +1,97 @@
+"""
+Patches transformers 4.55.3 to register the qwen3_5 model type.
+
+Deploy steps on the remote machine:
+  1. cp -r modified_scripts/qwen3_5 /usr/local/lib/python3.10/site-packages/transformers/models/qwen3_5
+  2. python3 modified_scripts/patch_transformers_qwen3_5.py
+
+Target: pip-installed transformers at /usr/local/lib/python3.10/site-packages/transformers/
+(Not the corex pre-installed path at /usr/local/corex/lib64/python3/dist-packages/)
+"""
+
+import sys
+
+TRANSFORMERS_ROOT = "/usr/local/lib/python3.10/site-packages/transformers"
+AUTO_CONFIG = f"{TRANSFORMERS_ROOT}/models/auto/configuration_auto.py"
+MODELS_INIT = f"{TRANSFORMERS_ROOT}/models/__init__.py"
+
+
+def patch_file(path, replacements):
+    with open(path, "r") as f:
+        content = f.read()
+
+    patched = False
+    for old, new in replacements:
+        if new in content:
+            print(f"  [skip] already patched: {repr(new[:60])}")
+            continue
+        if old not in content:
+            print(f"  [warn] anchor not found: {repr(old[:60])}")
+            continue
+        content = content.replace(old, new, 1)
+        patched = True
+        print(f"  [ok]   inserted after: {repr(old[:60])}")
+
+    if patched:
+        with open(path, "w") as f:
+            f.write(content)
+
+
+def main():
+    print(f"=== Patching {AUTO_CONFIG} ===")
+    patch_file(AUTO_CONFIG, [
+        # CONFIG_MAPPING_NAMES: insert qwen3_5 right after qwen3
+        (
+            '("qwen3", "Qwen3Config"),',
+            '("qwen3", "Qwen3Config"),\n        ("qwen3_5", "Qwen3_5Config"),',
+        ),
+        # Some versions don't have trailing comma — handle that too
+        (
+            '("qwen3", "Qwen3Config")\n',
+            '("qwen3", "Qwen3Config"),\n        ("qwen3_5", "Qwen3_5Config"),\n',
+        ),
+        # MODEL_NAMES_MAPPING (model_type -> human readable name, used by docstring generator)
+        (
+            '("qwen3", "Qwen3"),',
+            '("qwen3", "Qwen3"),\n        ("qwen3_5", "Qwen3_5"),',
+        ),
+        (
+            '("qwen3", "Qwen3")\n',
+            '("qwen3", "Qwen3"),\n        ("qwen3_5", "Qwen3_5"),\n',
+        ),
+    ])
+
+    print(f"\n=== Patching {MODELS_INIT} ===")
+    patch_file(MODELS_INIT, [
+        (
+            "from .qwen3 import *\n",
+            "from .qwen3 import *\n    from .qwen3_5 import *\n",
+        ),
+    ])
+
+    # Verification
+    print("\n=== Verification ===")
+    try:
+        import importlib.util, types
+
+        # Quick smoke-test: import the config class directly
+        spec = importlib.util.spec_from_file_location(
+            "configuration_qwen3_5",
+            f"{TRANSFORMERS_ROOT}/models/qwen3_5/configuration_qwen3_5.py",
+        )
+        mod = importlib.util.module_from_spec(spec)
+        # Provide minimal parent package stubs so relative imports resolve
+        pkg = types.ModuleType("transformers")
+        pkg.__path__ = [TRANSFORMERS_ROOT]
+        sys.modules.setdefault("transformers", pkg)
+        spec.loader.exec_module(mod)
+        cfg = mod.Qwen3_5Config()
+        print(f"  Qwen3_5Config() smoke-test OK  (model_type={cfg.model_type})")
+    except Exception as e:
+        print(f"  [warn] smoke-test failed (may be fine at runtime): {e}")
+
+    print("\nDone.")
+
+
+if __name__ == "__main__":
+    main()

qwen3_6_scripts/patch_vllm_qwen3_5.py

@@ -0,0 +1,73 @@
+"""
+Patches the vLLM model registry and deploys the Qwen3_5 model file.
+
+Deploy steps on the remote machine:
+  1. cp modified_scripts/qwen3_5.py \
+        /usr/local/corex/lib64/python3/dist-packages/vllm/model_executor/models/qwen3_5.py
+  2. python3 modified_scripts/patch_vllm_qwen3_5.py
+
+Also edit your model config.json to set:
+  "architectures": ["Qwen3_5ForCausalLM"]
+
+Target: vLLM at /usr/local/corex/lib64/python3/dist-packages/vllm/
+"""
+
+VLLM_ROOT = "/usr/local/corex/lib64/python3/dist-packages/vllm"
+REGISTRY = f"{VLLM_ROOT}/model_executor/models/registry.py"
+
+
+def patch_file(path, replacements):
+    with open(path, "r") as f:
+        content = f.read()
+
+    patched = False
+    for old, new in replacements:
+        if new in content:
+            print(f"  [skip] already patched: {repr(new[:70])}")
+            continue
+        if old not in content:
+            print(f"  [warn] anchor not found: {repr(old[:70])}")
+            continue
+        content = content.replace(old, new, 1)
+        patched = True
+        print(f"  [ok]   patched after: {repr(old[:70])}")
+
+    if patched:
+        with open(path, "w") as f:
+            f.write(content)
+
+
+def main():
+    print(f"=== Patching {REGISTRY} ===")
+    patch_file(REGISTRY, [
+        (
+            '    "Qwen3ForCausalLM": ("qwen3", "Qwen3ForCausalLM"),\n'
+            '    "Qwen3MoeForCausalLM": ("qwen3_moe", "Qwen3MoeForCausalLM"),',
+            '    "Qwen3ForCausalLM": ("qwen3", "Qwen3ForCausalLM"),\n'
+            '    "Qwen3MoeForCausalLM": ("qwen3_moe", "Qwen3MoeForCausalLM"),\n'
+            '    "Qwen3_5ForCausalLM": ("qwen3_5", "Qwen3_5ForCausalLM"),',
+        ),
+    ])
+
+    print("\n=== Verification ===")
+    try:
+        import importlib.util
+        spec = importlib.util.spec_from_file_location(
+            "qwen3_5",
+            f"{VLLM_ROOT}/model_executor/models/qwen3_5.py",
+        )
+        mod = importlib.util.module_from_spec(spec)
+        # Quick check: does the class exist?
+        spec.loader.exec_module(mod)
+        cls = mod.Qwen3_5ForCausalLM
+        print(f"  Qwen3_5ForCausalLM found: {cls}")
+    except Exception as e:
+        print(f"  [warn] verification failed (may be OK at runtime): {e}")
+
+    print("\nDone. Remember to:")
+    print("  1. Set config.json 'architectures': ['Qwen3_5ForCausalLM']")
+    print("  2. Run patch_transformers_qwen3_5.py if not already done")
+
+
+if __name__ == "__main__":
+    main()

qwen3_6_scripts/patch_xformers_sdpa_batch.py

@@ -0,0 +1,192 @@
+"""
+策略：批量（block-diagonal）fallback — 纯 PyTorch 数学实现
+=============================================================
+构建块对角 causal mask，对整批序列一次 matmul + softmax，
+完全绕开所有硬件 flash attention kernel。
+
+背景：
+  ixformer flshattF:         head_dim > 128 报错拒绝
+  cudnnFlashAttnForward:     接受 head_dim=256，但数值结果错误（输出全"!"）
+  两者大概率是同一硬件单元，ixformer 提前拦截了硬件不支持的配置。
+  纯 matmul 路径完全绕开硬件 flash attention，数值正确。
+
+优点：
+  数值正确。
+  并发请求 prefill attention 在 GPU 上真正并行（一次大 matmul）。
+
+缺点：
+  峰值显存 = total_tokens² × H × dtype_size
+  total_tokens 受 --max-num-batched-tokens 控制，max-model-len 控制不住。
+
+内存参考（fp16，H_local=6，--max-num-batched-tokens=T）：
+  T=2048  → 峰值 ~50  MB
+  T=4096  → 峰值 ~200 MB
+  T=8192  → 峰值 ~800 MB
+  T=16384 → 峰值 ~3.2 GB
+
+Deploy:
+  python3 modified_scripts/patch_xformers_sdpa_batch.py
+"""
+
+XFORMERS_PATH = (
+    "/usr/local/corex/lib64/python3/dist-packages/"
+    "vllm/attention/backends/xformers.py"
+)
+
+FALLBACK_METHOD = '''
+    def _run_sdpa_fallback(
+        self,
+        query: torch.Tensor,
+        key: torch.Tensor,
+        value: torch.Tensor,
+        attn_metadata: "XFormersMetadata",
+    ) -> torch.Tensor:
+        """批量纯数学 attention fallback。
+
+        构建块对角 causal mask（等价于 ixformer BlockDiagonalCausalMask），
+        对整批序列一次 matmul + softmax，GPU 并行处理所有序列。
+
+        块对角 mask 结构（seq1 len=3，seq2 len=2）：
+                 s1,0  s1,1  s1,2  s2,0  s2,1
+          s1,0 [  0   -inf  -inf  -inf  -inf ]
+          s1,1 [  0    0   -inf  -inf  -inf ]
+          s1,2 [  0    0    0   -inf  -inf ]
+          s2,0 [-inf  -inf  -inf   0   -inf ]
+          s2,1 [-inf  -inf  -inf   0    0  ]
+
+        softmax 在 float32 下计算防止 float16 溢出，结果转回原始 dtype。
+
+        Args:
+            query : [1, total_prefill_tokens, num_heads,    head_dim]
+            key   : [1, total_prefill_tokens, num_kv_heads, head_dim]
+            value : [1, total_prefill_tokens, num_kv_heads, head_dim]
+        Returns:
+            [1, total_prefill_tokens, num_heads, head_dim]
+        """
+        assert attn_metadata.seq_lens is not None
+        orig_dtype = query.dtype
+        total_tokens = query.shape[1]
+
+        # ── 构建块对角 causal mask [T, T] ────────────────────────────────
+        # 全部初始化为 -inf，再对每条序列的对角块填入下三角 0
+        mask = torch.full(
+            (total_tokens, total_tokens),
+            float("-inf"),
+            dtype=torch.float32,
+            device=query.device,
+        )
+        start = 0
+        for seq_len in attn_metadata.seq_lens:
+            end = start + seq_len
+            mask[start:end, start:end] = torch.tril(
+                torch.zeros(seq_len, seq_len,
+                            dtype=torch.float32, device=query.device)
+            )
+            start = end
+
+        # ── [1, H, T, D]，.contiguous() ──────────────────────────────────
+        q_all = query.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+        k_all = key.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+        v_all = value.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+
+        # ── GQA：展开 KV heads ────────────────────────────────────────────
+        if k_all.shape[1] != q_all.shape[1]:
+            n = q_all.shape[1] // k_all.shape[1]
+            k_all = k_all.repeat_interleave(n, dim=1).contiguous()
+            v_all = v_all.repeat_interleave(n, dim=1).contiguous()
+
+        # ── 纯数学 attention（float32 防溢出）────────────────────────────
+        # [1, H, T, T]
+        attn_w = torch.matmul(q_all.float(), k_all.float().transpose(-2, -1))
+        attn_w = attn_w * self.scale
+        attn_w = attn_w + mask  # 加法广播：mask [T,T] → [1, H, T, T]
+        attn_w = torch.softmax(attn_w, dim=-1)
+
+        out = torch.matmul(attn_w, v_all.float()).to(orig_dtype)
+        # [1, H, T, D] → [1, T, H, D]
+        return out.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+
+'''
+
+OLD_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            out = xops.memory_efficient_attention_forward(
+                query,
+                key,
+                value,
+                attn_bias=attn_bias[0],
+                p=0.0,
+                scale=self.scale,
+                op = self.attn_op
+                )
+            return out.view_as(original_query)\
+"""
+
+NEW_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            if self.head_size > 128:
+                out = self._run_sdpa_fallback(query, key, value, attn_metadata)
+            else:
+                out = xops.memory_efficient_attention_forward(
+                    query,
+                    key,
+                    value,
+                    attn_bias=attn_bias[0],
+                    p=0.0,
+                    scale=self.scale,
+                    op=self.attn_op,
+                )
+            return out.view_as(original_query)\
+"""
+
+INJECT_ANCHOR = "    def _run_memory_efficient_xformers_forward("
+
+
+def patch_file(path):
+    with open(path, "r") as f:
+        content = f.read()
+    changed = False
+
+    if "_run_sdpa_fallback" in content:
+        print("  [skip] _run_sdpa_fallback already present")
+    elif INJECT_ANCHOR not in content:
+        print("  [warn] inject anchor not found")
+    else:
+        content = content.replace(INJECT_ANCHOR, FALLBACK_METHOD + INJECT_ANCHOR, 1)
+        print("  [ok]   injected _run_sdpa_fallback (batch, pure-math)")
+        changed = True
+
+    if NEW_XFORMER_BLOCK in content:
+        print("  [skip] dispatch block already patched")
+    elif OLD_XFORMER_BLOCK in content:
+        content = content.replace(OLD_XFORMER_BLOCK, NEW_XFORMER_BLOCK, 1)
+        print("  [ok]   patched dispatch block")
+        changed = True
+    else:
+        print("  [warn] dispatch block anchor not found")
+
+    if changed:
+        with open(path, "w") as f:
+            f.write(content)
+        print(f"  Written: {path}")
+
+
+def main():
+    print("=== patch_xformers_sdpa_batch (batch, pure-math) ===")
+    print(f"Target: {XFORMERS_PATH}")
+    patch_file(XFORMERS_PATH)
+    print("\nDone.")
+
+
+if __name__ == "__main__":
+    main()

qwen3_6_scripts/patch_xformers_sdpa_batch_kernel.py

@@ -0,0 +1,191 @@
+"""
+策略：批量（block-diagonal）— F.scaled_dot_product_attention，可走硬件 kernel
+=============================================================================
+构建块对角 causal mask，对整批序列一次 F.scaled_dot_product_attention。
+与 patch_xformers_sdpa_batch.py（纯 matmul）的区别：
+  SDPA 会根据 PyTorch/驱动能力分发到最优 kernel（Flash Attention /
+  mem-efficient attention / math fallback），而不是固定走 cublas matmul。
+
+历史说明：
+  该方案最早因输出全"!"而被弃用，后续排查确认"!"由 mamba_cache.py bug
+  引起，与 attention 实现无关。当前恢复此方案用于性能对比测试。
+
+已知硬件限制（BI-V100）：
+  cudnnFlashAttnForward 不支持 is_causal=True（报错）。
+  本实现使用 is_causal=False + 显式块对角 additive mask 规避此限制。
+  若 SDPA 仍分发到有问题的 kernel，回退到 patch_xformers_sdpa_batch.py。
+
+优点（vs 纯 matmul）：
+  SDPA 可分发到 Flash Attention kernel → O(L) 显存、更快的 CUDA kernel。
+
+缺点：
+  依赖硬件 kernel 行为，若 kernel 有 bug 则数值错误（需与 matmul 版对比验证）。
+
+Deploy:
+  python3 modified_scripts/patch_xformers_sdpa_batch_kernel.py
+"""
+
+XFORMERS_PATH = (
+    "/usr/local/corex/lib64/python3/dist-packages/"
+    "vllm/attention/backends/xformers.py"
+)
+
+FALLBACK_METHOD = '''
+    def _run_sdpa_fallback(
+        self,
+        query: torch.Tensor,
+        key: torch.Tensor,
+        value: torch.Tensor,
+        attn_metadata: "XFormersMetadata",
+    ) -> torch.Tensor:
+        """批量 F.scaled_dot_product_attention fallback（可走硬件 kernel）。
+
+        构建块对角 causal mask，对整批序列一次 SDPA 调用。
+        SDPA 可分发到 Flash Attention / mem-efficient attention kernel。
+        is_causal=False + 显式 additive mask，规避 cudnnFlashAttnForward
+        不支持 is_causal=True 的限制。
+
+        块对角 mask（seq1 len=3，seq2 len=2）：
+                 s1,0  s1,1  s1,2  s2,0  s2,1
+          s1,0 [  0   -inf  -inf  -inf  -inf ]
+          s1,1 [  0    0   -inf  -inf  -inf ]
+          s1,2 [  0    0    0   -inf  -inf ]
+          s2,0 [-inf  -inf  -inf   0   -inf ]
+          s2,1 [-inf  -inf  -inf   0    0  ]
+
+        Args:
+            query : [1, total_prefill_tokens, num_heads,    head_dim]
+            key   : [1, total_prefill_tokens, num_kv_heads, head_dim]
+            value : [1, total_prefill_tokens, num_kv_heads, head_dim]
+        Returns:
+            [1, total_prefill_tokens, num_heads, head_dim]
+        """
+        import torch.nn.functional as F
+
+        assert attn_metadata.seq_lens is not None
+        orig_dtype = query.dtype
+        total_tokens = query.shape[1]
+
+        # ── 块对角 causal mask [T, T] ─────────────────────────────────────
+        mask = torch.full(
+            (total_tokens, total_tokens),
+            float("-inf"),
+            dtype=orig_dtype,
+            device=query.device,
+        )
+        start = 0
+        for seq_len in attn_metadata.seq_lens:
+            end = start + seq_len
+            mask[start:end, start:end] = torch.tril(
+                torch.zeros(seq_len, seq_len, dtype=orig_dtype, device=query.device)
+            )
+            start = end
+
+        # ── [1, H, T, D] ──────────────────────────────────────────────────
+        q_all = query.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+        k_all = key.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+        v_all = value.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+
+        # ── GQA：展开 KV heads ────────────────────────────────────────────
+        if k_all.shape[1] != q_all.shape[1]:
+            n = q_all.shape[1] // k_all.shape[1]
+            k_all = k_all.repeat_interleave(n, dim=1).contiguous()
+            v_all = v_all.repeat_interleave(n, dim=1).contiguous()
+
+        # ── F.scaled_dot_product_attention（可走硬件 kernel）─────────────
+        # is_causal=False：避免 cudnnFlashAttnForward "not support causal mode"
+        # attn_mask 传 additive float mask（非 bool），SDPA 选择 math/kernel 路径
+        out = F.scaled_dot_product_attention(
+            q_all, k_all, v_all,
+            attn_mask=mask,
+            dropout_p=0.0,
+            is_causal=False,
+            scale=self.scale,
+        )
+        # [1, H, T, D] → [1, T, H, D]
+        return out.squeeze(0).permute(1, 0, 2).contiguous().unsqueeze(0)
+
+'''
+
+OLD_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            out = xops.memory_efficient_attention_forward(
+                query,
+                key,
+                value,
+                attn_bias=attn_bias[0],
+                p=0.0,
+                scale=self.scale,
+                op = self.attn_op
+                )
+            return out.view_as(original_query)\
+"""
+
+NEW_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            if self.head_size > 128:
+                out = self._run_sdpa_fallback(query, key, value, attn_metadata)
+            else:
+                out = xops.memory_efficient_attention_forward(
+                    query,
+                    key,
+                    value,
+                    attn_bias=attn_bias[0],
+                    p=0.0,
+                    scale=self.scale,
+                    op=self.attn_op,
+                )
+            return out.view_as(original_query)\
+"""
+
+INJECT_ANCHOR = "    def _run_memory_efficient_xformers_forward("
+
+
+def patch_file(path):
+    with open(path, "r") as f:
+        content = f.read()
+    changed = False
+
+    if "_run_sdpa_fallback" in content:
+        print("  [skip] _run_sdpa_fallback already present")
+    elif INJECT_ANCHOR not in content:
+        print("  [warn] inject anchor not found")
+    else:
+        content = content.replace(INJECT_ANCHOR, FALLBACK_METHOD + INJECT_ANCHOR, 1)
+        print("  [ok]   injected _run_sdpa_fallback (batch, F.sdpa kernel)")
+        changed = True
+
+    if NEW_XFORMER_BLOCK in content:
+        print("  [skip] dispatch block already patched")
+    elif OLD_XFORMER_BLOCK in content:
+        content = content.replace(OLD_XFORMER_BLOCK, NEW_XFORMER_BLOCK, 1)
+        print("  [ok]   patched dispatch block")
+        changed = True
+    else:
+        print("  [warn] dispatch block anchor not found")
+
+    if changed:
+        with open(path, "w") as f:
+            f.write(content)
+        print(f"  Written: {path}")
+
+
+def main():
+    print("=== patch_xformers_sdpa_batch_kernel (batch, F.sdpa + kernel dispatch) ===")
+    print(f"Target: {XFORMERS_PATH}")
+    patch_file(XFORMERS_PATH)
+    print("\nDone.")
+
+
+if __name__ == "__main__":
+    main()

qwen3_6_scripts/patch_xformers_sdpa_seq.py

@@ -0,0 +1,186 @@
+"""
+策略：顺序（per-sequence）fallback — 纯 PyTorch 数学实现
+==========================================================
+逐条序列用 matmul + softmax 手写 attention，完全绕开所有硬件
+flash attention kernel（ixformer / cudnnFlashAttnForward）。
+
+背景：
+  Iluvatar cudnnFlashAttnForward 存在两个已知问题：
+    1. 不支持 is_causal=True（报错）
+    2. 使用 attn_mask 路径时数值结果不正确（静默错误，输出全为"!"）
+  与华为昇腾 910B4 上 llama.cpp --flash-attn off 修复同类问题的原理相同。
+  纯数学路径（matmul + softmax）在任何 PyTorch 后端上结果都正确。
+
+优点：
+  数值正确，不依赖任何硬件特定 attention kernel。
+  峰值显存 = max(seq_len)² × H × dtype_size，由 --max-model-len 控制。
+
+缺点：
+  并发请求的 prefill attention 串行执行。
+  O(L²) 显存（无 flash attention 的 O(L) 优化）。
+
+内存参考（fp16，H_local=6）：
+  max-model-len=4096  → 峰值 ~200 MB
+  max-model-len=8192  → 峰值 ~800 MB
+  max-model-len=16384 → 峰值 ~3.2 GB
+
+Deploy:
+  python3 modified_scripts/patch_xformers_sdpa_seq.py
+"""
+
+XFORMERS_PATH = (
+    "/usr/local/corex/lib64/python3/dist-packages/"
+    "vllm/attention/backends/xformers.py"
+)
+
+FALLBACK_METHOD = '''
+    def _run_sdpa_fallback(
+        self,
+        query: torch.Tensor,
+        key: torch.Tensor,
+        value: torch.Tensor,
+        attn_metadata: "XFormersMetadata",
+    ) -> torch.Tensor:
+        """顺序纯数学 attention fallback。
+
+        完全绕开 ixformer / cudnnFlashAttnForward，用 matmul + softmax
+        手写 attention。Iluvatar cudnnFlashAttnForward 的 attn_mask 路径
+        存在静默数值错误（输出全为"!"），纯数学路径结果正确。
+
+        softmax 在 float32 下计算以防止 float16 溢出，结果转回原始 dtype。
+
+        Args:
+            query : [1, total_prefill_tokens, num_heads,    head_dim]
+            key   : [1, total_prefill_tokens, num_kv_heads, head_dim]
+            value : [1, total_prefill_tokens, num_kv_heads, head_dim]
+        Returns:
+            [1, total_prefill_tokens, num_heads, head_dim]
+        """
+        assert attn_metadata.seq_lens is not None
+        orig_dtype = query.dtype
+
+        q_flat = query.squeeze(0)   # [T, H,   D]
+        k_flat = key.squeeze(0)     # [T, Hkv, D]
+        v_flat = value.squeeze(0)
+
+        output = torch.empty_like(q_flat)
+        start = 0
+        for seq_len in attn_metadata.seq_lens:
+            end = start + seq_len
+            # [1, H, L, D]
+            q_s = q_flat[start:end].permute(1, 0, 2).contiguous().unsqueeze(0)
+            k_s = k_flat[start:end].permute(1, 0, 2).contiguous().unsqueeze(0)
+            v_s = v_flat[start:end].permute(1, 0, 2).contiguous().unsqueeze(0)
+
+            # GQA：展开 KV heads 至与 query heads 一致
+            if k_s.shape[1] != q_s.shape[1]:
+                n = q_s.shape[1] // k_s.shape[1]
+                k_s = k_s.repeat_interleave(n, dim=1).contiguous()
+                v_s = v_s.repeat_interleave(n, dim=1).contiguous()
+
+            # 纯数学 attention：完全绕开硬件 flash attention kernel
+            # [1, H, L, L]
+            attn_w = torch.matmul(q_s.float(), k_s.float().transpose(-2, -1))
+            attn_w = attn_w * self.scale
+
+            # 上三角填 -inf（future tokens）
+            causal_mask = torch.triu(
+                torch.ones(seq_len, seq_len, dtype=torch.bool, device=attn_w.device),
+                diagonal=1,
+            )
+            attn_w = attn_w.masked_fill(causal_mask, float("-inf"))
+
+            # float32 softmax 防止 float16 溢出
+            attn_w = torch.softmax(attn_w, dim=-1)
+
+            out_s = torch.matmul(attn_w, v_s.float()).to(orig_dtype)
+            # [1, H, L, D] → [L, H, D]
+            output[start:end] = out_s.squeeze(0).permute(1, 0, 2)
+            start = end
+
+        return output.unsqueeze(0)  # [1, T, H, D]
+
+'''
+
+OLD_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            out = xops.memory_efficient_attention_forward(
+                query,
+                key,
+                value,
+                attn_bias=attn_bias[0],
+                p=0.0,
+                scale=self.scale,
+                op = self.attn_op
+                )
+            return out.view_as(original_query)\
+"""
+
+NEW_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            if self.head_size > 128:
+                out = self._run_sdpa_fallback(query, key, value, attn_metadata)
+            else:
+                out = xops.memory_efficient_attention_forward(
+                    query,
+                    key,
+                    value,
+                    attn_bias=attn_bias[0],
+                    p=0.0,
+                    scale=self.scale,
+                    op=self.attn_op,
+                )
+            return out.view_as(original_query)\
+"""
+
+INJECT_ANCHOR = "    def _run_memory_efficient_xformers_forward("
+
+
+def patch_file(path):
+    with open(path, "r") as f:
+        content = f.read()
+    changed = False
+
+    if "_run_sdpa_fallback" in content:
+        print("  [skip] _run_sdpa_fallback already present")
+    elif INJECT_ANCHOR not in content:
+        print("  [warn] inject anchor not found")
+    else:
+        content = content.replace(INJECT_ANCHOR, FALLBACK_METHOD + INJECT_ANCHOR, 1)
+        print("  [ok]   injected _run_sdpa_fallback (sequential, pure-math)")
+        changed = True
+
+    if NEW_XFORMER_BLOCK in content:
+        print("  [skip] dispatch block already patched")
+    elif OLD_XFORMER_BLOCK in content:
+        content = content.replace(OLD_XFORMER_BLOCK, NEW_XFORMER_BLOCK, 1)
+        print("  [ok]   patched dispatch block")
+        changed = True
+    else:
+        print("  [warn] dispatch block anchor not found")
+
+    if changed:
+        with open(path, "w") as f:
+            f.write(content)
+        print(f"  Written: {path}")
+
+
+def main():
+    print("=== patch_xformers_sdpa_seq (sequential, pure-math) ===")
+    print(f"Target: {XFORMERS_PATH}")
+    patch_file(XFORMERS_PATH)
+    print("\nDone.")
+
+
+if __name__ == "__main__":
+    main()

qwen3_6_scripts/patch_xformers_sdpa_seq_kernel.py

@@ -0,0 +1,181 @@
+"""
+策略：顺序（per-sequence）— F.scaled_dot_product_attention，可走硬件 kernel
+=============================================================================
+逐条序列调用 F.scaled_dot_product_attention，is_causal=False + 显式因果 mask。
+与 patch_xformers_sdpa_seq.py（纯 matmul）的区别：
+  SDPA 可分发到 Flash Attention / mem-efficient attention kernel，
+  而纯 matmul 固定走 cublas。
+
+硬件限制（BI-V100）：
+  cudnnFlashAttnForward 不支持 is_causal=True（直接报错）。
+  必须使用 is_causal=False + 显式 additive causal mask。
+  每条序列单独构造上三角 -inf mask，peak 显存 = max(seq_len)² × dtype，
+  比 batch 版的 total_tokens² 小得多。
+
+与 batch_kernel 的对比：
+  seq_kernel:   显存小，peak = max_single_seq²；并发 prefill 串行排队
+  batch_kernel: 显存大，peak = total_tokens²；并发 prefill 一次并行处理，
+                通过 --max-num-batched-tokens 控制 total_tokens 上限
+
+Deploy:
+  python3 modified_scripts/patch_xformers_sdpa_seq_kernel.py
+"""
+
+XFORMERS_PATH = (
+    "/usr/local/corex/lib64/python3/dist-packages/"
+    "vllm/attention/backends/xformers.py"
+)
+
+FALLBACK_METHOD = '''
+    def _run_sdpa_fallback(
+        self,
+        query: torch.Tensor,
+        key: torch.Tensor,
+        value: torch.Tensor,
+        attn_metadata: "XFormersMetadata",
+    ) -> torch.Tensor:
+        """顺序 F.scaled_dot_product_attention fallback（可走硬件 kernel）。
+
+        逐条序列调用 SDPA，is_causal=False + 显式上三角 additive mask。
+        cudnnFlashAttnForward 不支持 is_causal=True，必须用显式 mask。
+        逐序列构造 mask，peak 显存 = max(seq_len)² × dtype（远小于 batch 版）。
+
+        Args:
+            query : [1, total_prefill_tokens, num_heads,    head_dim]
+            key   : [1, total_prefill_tokens, num_kv_heads, head_dim]
+            value : [1, total_prefill_tokens, num_kv_heads, head_dim]
+        Returns:
+            [1, total_prefill_tokens, num_heads, head_dim]
+        """
+        import torch.nn.functional as F
+
+        assert attn_metadata.seq_lens is not None
+        orig_dtype = query.dtype
+
+        q_flat = query.squeeze(0)   # [T, H,   D]
+        k_flat = key.squeeze(0)     # [T, Hkv, D]
+        v_flat = value.squeeze(0)
+
+        output = torch.empty_like(q_flat)
+        start = 0
+        for seq_len in attn_metadata.seq_lens:
+            end = start + seq_len
+            # [1, H, L, D]
+            q_s = q_flat[start:end].permute(1, 0, 2).contiguous().unsqueeze(0)
+            k_s = k_flat[start:end].permute(1, 0, 2).contiguous().unsqueeze(0)
+            v_s = v_flat[start:end].permute(1, 0, 2).contiguous().unsqueeze(0)
+
+            # GQA：展开 KV heads
+            if k_s.shape[1] != q_s.shape[1]:
+                n = q_s.shape[1] // k_s.shape[1]
+                k_s = k_s.repeat_interleave(n, dim=1).contiguous()
+                v_s = v_s.repeat_interleave(n, dim=1).contiguous()
+
+            # 逐序列因果 mask [L, L]，上三角 -inf
+            causal_mask = torch.tril(
+                torch.zeros(seq_len, seq_len, dtype=orig_dtype, device=q_s.device)
+            )
+            causal_mask = causal_mask.masked_fill(
+                torch.triu(torch.ones(seq_len, seq_len, dtype=torch.bool,
+                                     device=q_s.device), diagonal=1),
+                float("-inf"),
+            )
+
+            # is_causal=False + 显式 mask，规避 cudnnFlashAttnForward 不支持 is_causal=True
+            out_s = F.scaled_dot_product_attention(
+                q_s, k_s, v_s,
+                attn_mask=causal_mask,
+                dropout_p=0.0,
+                is_causal=False,
+                scale=self.scale,
+            )
+            # [1, H, L, D] → [L, H, D]
+            output[start:end] = out_s.squeeze(0).permute(1, 0, 2).to(orig_dtype)
+            start = end
+
+        return output.unsqueeze(0)  # [1, T, H, D]
+
+'''
+
+OLD_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            out = xops.memory_efficient_attention_forward(
+                query,
+                key,
+                value,
+                attn_bias=attn_bias[0],
+                p=0.0,
+                scale=self.scale,
+                op = self.attn_op
+                )
+            return out.view_as(original_query)\
+"""
+
+NEW_XFORMER_BLOCK = """\
+        self.attn_op = xops.fmha.flash.FwOp()
+        if self.alibi_slopes is None:
+            # Add the batch dimension.
+            query = query.unsqueeze(0)
+            key = key.unsqueeze(0)
+            value = value.unsqueeze(0)
+            if self.head_size > 128:
+                out = self._run_sdpa_fallback(query, key, value, attn_metadata)
+            else:
+                out = xops.memory_efficient_attention_forward(
+                    query,
+                    key,
+                    value,
+                    attn_bias=attn_bias[0],
+                    p=0.0,
+                    scale=self.scale,
+                    op=self.attn_op,
+                )
+            return out.view_as(original_query)\
+"""
+
+INJECT_ANCHOR = "    def _run_memory_efficient_xformers_forward("
+
+
+def patch_file(path):
+    with open(path, "r") as f:
+        content = f.read()
+    changed = False
+
+    if "_run_sdpa_fallback" in content:
+        print("  [skip] _run_sdpa_fallback already present")
+    elif INJECT_ANCHOR not in content:
+        print("  [warn] inject anchor not found")
+    else:
+        content = content.replace(INJECT_ANCHOR, FALLBACK_METHOD + INJECT_ANCHOR, 1)
+        print("  [ok]   injected _run_sdpa_fallback (seq, F.sdpa kernel)")
+        changed = True
+
+    if NEW_XFORMER_BLOCK in content:
+        print("  [skip] dispatch block already patched")
+    elif OLD_XFORMER_BLOCK in content:
+        content = content.replace(OLD_XFORMER_BLOCK, NEW_XFORMER_BLOCK, 1)
+        print("  [ok]   patched dispatch block")
+        changed = True
+    else:
+        print("  [warn] dispatch block anchor not found")
+
+    if changed:
+        with open(path, "w") as f:
+            f.write(content)
+        print(f"  Written: {path}")
+
+
+def main():
+    print("=== patch_xformers_sdpa_seq_kernel (seq, F.sdpa + kernel dispatch) ===")
+    print(f"Target: {XFORMERS_PATH}")
+    patch_file(XFORMERS_PATH)
+    print("\nDone.")
+
+
+if __name__ == "__main__":
+    main()

qwen3_6_scripts/qwen3_5.py

@@ -0,0 +1,894 @@
+# Inference-only Qwen3.6-27B (Qwen3_5 architecture) for Iluvatar BI-V100.
+# Pure-PyTorch DeltaNet (no fla / causal_conv1d dependency).
+# Text-only (no VL, no MTP).
+
+from typing import Iterable, List, Optional, Tuple
+
+import torch
+import torch.nn.functional as F
+from torch import nn
+
+from vllm.attention import Attention, AttentionMetadata
+from vllm.config import CacheConfig, LoRAConfig, SchedulerConfig
+from vllm.distributed import (get_tensor_model_parallel_rank,
+                               get_tensor_model_parallel_world_size)
+from vllm.model_executor.layers.activation import SiluAndMul
+from vllm.model_executor.layers.layernorm import GemmaRMSNorm
+from vllm.model_executor.layers.linear import (ColumnParallelLinear,
+                                               MergedColumnParallelLinear,
+                                               RowParallelLinear)
+from vllm.model_executor.layers.logits_processor import LogitsProcessor
+from vllm.model_executor.layers.quantization import QuantizationConfig
+from vllm.model_executor.layers.rotary_embedding import get_rope
+from vllm.model_executor.layers.sampler import Sampler, SamplerOutput
+from vllm.model_executor.layers.vocab_parallel_embedding import (
+    ParallelLMHead, VocabParallelEmbedding)
+from vllm.model_executor.model_loader.weight_utils import (
+    default_weight_loader, sharded_weight_loader)
+from vllm.model_executor.models.mamba_cache import MambaCacheManager
+from vllm.model_executor.sampling_metadata import SamplingMetadata
+from vllm.model_executor.utils import set_weight_attrs
+from vllm.sequence import IntermediateTensors
+from vllm.worker.model_runner import (_BATCH_SIZES_TO_CAPTURE,
+                                      _get_graph_batch_size)
+
+from vllm.model_executor.models.interfaces import HasInnerState, SupportsLoRA
+
+
+# ---------------------------------------------------------------------------
+# Pure-PyTorch DeltaNet kernels (fallbacks from transformers 5.2.0)
+# ---------------------------------------------------------------------------
+
+def _l2norm(x: torch.Tensor, dim: int = -1, eps: float = 1e-6) -> torch.Tensor:
+    return x * torch.rsqrt((x * x).sum(dim=dim, keepdim=True) + eps)
+
+
+def _torch_causal_conv1d_update(
+    hidden_states: torch.Tensor,   # (batch, channels, seq=1)
+    conv_state: torch.Tensor,       # (batch, channels, state_len)  modified in-place
+    weight: torch.Tensor,           # (channels, kernel_size)
+    bias: Optional[torch.Tensor] = None,
+    activation: Optional[str] = None,
+) -> torch.Tensor:
+    _, channels, seq_len = hidden_states.shape
+    state_len = conv_state.shape[-1]
+    cat = torch.cat([conv_state, hidden_states], dim=-1).to(weight.dtype)
+    conv_state.copy_(cat[:, :, -state_len:])
+    out = F.conv1d(cat, weight.unsqueeze(1), bias, padding=0, groups=channels)
+    out = out[:, :, -seq_len:]
+    if activation is not None:
+        out = F.silu(out)
+    return out.to(hidden_states.dtype)
+
+
+def _torch_chunk_gated_delta_rule(
+    query: torch.Tensor,   # (batch, seq, num_heads, head_k_dim)
+    key: torch.Tensor,
+    value: torch.Tensor,   # (batch, seq, num_heads, head_v_dim)
+    g: torch.Tensor,       # (batch, seq, num_heads)
+    beta: torch.Tensor,    # (batch, seq, num_heads)
+    chunk_size: int = 64,
+    initial_state: Optional[torch.Tensor] = None,
+    output_final_state: bool = False,
+    use_qk_l2norm_in_kernel: bool = False,
+) -> Tuple[torch.Tensor, Optional[torch.Tensor]]:
+    initial_dtype = query.dtype
+    if use_qk_l2norm_in_kernel:
+        query = _l2norm(query)
+        key = _l2norm(key)
+    # Transpose to (batch, num_heads, seq, dim)
+    query, key, value, beta, g = [
+        x.transpose(1, 2).contiguous().to(torch.float32)
+        for x in (query, key, value, beta, g)
+    ]
+    batch, num_heads, seq_len, k_dim = key.shape
+    v_dim = value.shape[-1]
+    pad = (chunk_size - seq_len % chunk_size) % chunk_size
+    query = F.pad(query, (0, 0, 0, pad))
+    key = F.pad(key, (0, 0, 0, pad))
+    value = F.pad(value, (0, 0, 0, pad))
+    beta = F.pad(beta, (0, pad))
+    g = F.pad(g, (0, pad))
+    total_len = seq_len + pad
+    scale = 1.0 / (query.shape[-1] ** 0.5)
+    query = query * scale
+
+    v_beta = value * beta.unsqueeze(-1)
+    k_beta = key * beta.unsqueeze(-1)
+    query, key, value, k_beta, v_beta = [
+        x.reshape(x.shape[0], x.shape[1], -1, chunk_size, x.shape[-1])
+        for x in (query, key, value, k_beta, v_beta)
+    ]
+    g = g.reshape(g.shape[0], g.shape[1], -1, chunk_size)
+    mask_upper = torch.triu(
+        torch.ones(chunk_size, chunk_size, dtype=torch.bool, device=query.device),
+        diagonal=0)
+
+    g = g.cumsum(dim=-1)
+    decay_mask = ((g.unsqueeze(-1) - g.unsqueeze(-2)).tril().exp().float()).tril()
+    attn = -((k_beta @ key.transpose(-1, -2)) * decay_mask).masked_fill(mask_upper, 0)
+    for i in range(1, chunk_size):
+        row = attn[..., i, :i].clone()
+        sub = attn[..., :i, :i].clone()
+        attn[..., i, :i] = row + (row.unsqueeze(-1) * sub).sum(-2)
+    attn = attn + torch.eye(chunk_size, dtype=attn.dtype, device=attn.device)
+    value = attn @ v_beta
+    k_cumdecay = attn @ (k_beta * g.exp().unsqueeze(-1))
+
+    last_state = (
+        torch.zeros(batch, num_heads, k_dim, v_dim, dtype=value.dtype, device=value.device)
+        if initial_state is None
+        else initial_state.to(value)
+    )
+    core_out = torch.zeros_like(value)
+    mask_upper2 = torch.triu(
+        torch.ones(chunk_size, chunk_size, dtype=torch.bool, device=query.device),
+        diagonal=1)
+
+    for i in range(total_len // chunk_size):
+        q_i, k_i, v_i = query[:, :, i], key[:, :, i], value[:, :, i]
+        attn_i = (q_i @ k_i.transpose(-1, -2) * decay_mask[:, :, i]).masked_fill_(mask_upper2, 0)
+        v_prime = k_cumdecay[:, :, i] @ last_state
+        v_new = v_i - v_prime
+        attn_inter = (q_i * g[:, :, i, :, None].exp()) @ last_state
+        core_out[:, :, i] = attn_inter + attn_i @ v_new
+        last_state = (
+            last_state * g[:, :, i, -1, None, None].exp()
+            + (k_i * (g[:, :, i, -1, None] - g[:, :, i]).exp()[..., None])
+            .transpose(-1, -2) @ v_new
+        )
+
+    if not output_final_state:
+        last_state = None
+    core_out = core_out.reshape(batch, num_heads, -1, v_dim)[:, :, :seq_len]
+    core_out = core_out.transpose(1, 2).contiguous().to(initial_dtype)
+    return core_out, last_state
+
+def _torch_recurrent_gated_delta_rule(
+    query: torch.Tensor,   # (batch, 1, num_heads, head_k_dim)
+    key: torch.Tensor,
+    value: torch.Tensor,
+    g: torch.Tensor,       # (batch, 1, num_heads)
+    beta: torch.Tensor,
+    initial_state: Optional[torch.Tensor] = None,
+    output_final_state: bool = False,
+    use_qk_l2norm_in_kernel: bool = False,
+) -> Tuple[torch.Tensor, Optional[torch.Tensor]]:
+    initial_dtype = query.dtype
+    if use_qk_l2norm_in_kernel:
+        query = _l2norm(query)
+        key = _l2norm(key)
+    query, key, value, beta, g = [
+        x.transpose(1, 2).contiguous().to(torch.float32)
+        for x in (query, key, value, beta, g)
+    ]
+    batch, num_heads, seq_len, k_dim = key.shape
+    v_dim = value.shape[-1]
+    scale = 1.0 / (query.shape[-1] ** 0.5)
+    query = query * scale
+
+    core_out = torch.zeros(batch, num_heads, seq_len, v_dim,
+                           dtype=value.dtype, device=value.device)
+    last_state = (
+        torch.zeros(batch, num_heads, k_dim, v_dim,
+                    dtype=value.dtype, device=value.device)
+        if initial_state is None
+        else initial_state.to(value)
+    )
+    for t in range(seq_len):
+        q_t = query[:, :, t]
+        k_t = key[:, :, t]
+        v_t = value[:, :, t]
+        g_t = g[:, :, t].exp().unsqueeze(-1).unsqueeze(-1)
+        beta_t = beta[:, :, t].unsqueeze(-1)
+        last_state = last_state * g_t
+        kv_mem = (last_state * k_t.unsqueeze(-1)).sum(dim=-2)
+        delta = (v_t - kv_mem) * beta_t
+        last_state = last_state + k_t.unsqueeze(-1) * delta.unsqueeze(-2)
+        core_out[:, :, t] = (last_state * q_t.unsqueeze(-1)).sum(dim=-2)
+
+    if not output_final_state:
+        last_state = None
+    core_out = core_out.transpose(1, 2).contiguous().to(initial_dtype)
+    return core_out, last_state
+
+
+# ---------------------------------------------------------------------------
+# Gated RMSNorm (for DeltaNet output normalisation)
+# ---------------------------------------------------------------------------
+
+class Qwen3_5RMSNormGated(nn.Module):
+    def __init__(self, hidden_size: int, eps: float = 1e-6):
+        super().__init__()
+        self.weight = nn.Parameter(torch.ones(hidden_size))
+        self.variance_epsilon = eps
+
+    def forward(self, hidden_states: torch.Tensor,
+                gate: torch.Tensor) -> torch.Tensor:
+        input_dtype = hidden_states.dtype
+        hs = hidden_states.to(torch.float32)
+        variance = hs.pow(2).mean(-1, keepdim=True)
+        hs = hs * torch.rsqrt(variance + self.variance_epsilon)
+        hs = self.weight * hs.to(input_dtype)
+        return (hs * F.silu(gate.to(torch.float32))).to(input_dtype)
+
+
+# ---------------------------------------------------------------------------
+# Gated DeltaNet  (linear_attention layers)
+# ---------------------------------------------------------------------------
+
+class GatedDeltaNet(nn.Module):
+    def __init__(
+        self,
+        text_cfg,
+        layer_idx: int,
+        quant_config: Optional[QuantizationConfig] = None,
+    ) -> None:
+        super().__init__()
+        self.layer_idx = layer_idx
+        self.hidden_size = text_cfg.hidden_size
+        self.num_v_heads = text_cfg.linear_num_value_heads   # 48
+        self.num_k_heads = text_cfg.linear_num_key_heads     # 16
+        self.head_k_dim = text_cfg.linear_key_head_dim       # 128
+        self.head_v_dim = text_cfg.linear_value_head_dim     # 128
+        self.key_dim = self.num_k_heads * self.head_k_dim    # 2048
+        self.value_dim = self.num_v_heads * self.head_v_dim  # 6144
+        self.conv_dim = self.key_dim * 2 + self.value_dim    # 10240
+        self.conv_kernel_size = text_cfg.linear_conv_kernel_dim  # 4
+        self.head_expand_ratio = self.num_v_heads // self.num_k_heads  # 3
+
+        tp_size = get_tensor_model_parallel_world_size()
+
+        # Sharded projections — MergedColumnParallelLinear shards each of q/k/v
+        # independently so each TP rank gets [q_shard, k_shard, v_shard].
+        # Plain ColumnParallelLinear would shard contiguously, giving rank 0
+        # [q_all, k_partial] — completely wrong Q/K/V after the split below.
+        self.in_proj_qkv = MergedColumnParallelLinear(
+            self.hidden_size, [self.key_dim, self.key_dim, self.value_dim],
+            bias=False, quant_config=quant_config)
+        self.in_proj_z = ColumnParallelLinear(
+            self.hidden_size, self.value_dim,
+            bias=False, quant_config=quant_config)
+        self.in_proj_b = ColumnParallelLinear(
+            self.hidden_size, self.num_v_heads,
+            bias=False, quant_config=quant_config)
+        self.in_proj_a = ColumnParallelLinear(
+            self.hidden_size, self.num_v_heads,
+            bias=False, quant_config=quant_config)
+        self.out_proj = RowParallelLinear(
+            self.value_dim, self.hidden_size,
+            bias=False, quant_config=quant_config)
+
+        # Depthwise conv weight — sharded along channel dim (dim 0)
+        local_conv_dim = self.conv_dim // tp_size
+        self.conv1d_weight = nn.Parameter(
+            torch.empty(local_conv_dim, 1, self.conv_kernel_size))
+        set_weight_attrs(self.conv1d_weight, {
+            "weight_loader": self._conv1d_weight_loader})
+
+        # Per-head scalar parameters — sharded along dim 0
+        local_num_v = self.num_v_heads // tp_size
+        self.A_log = nn.Parameter(torch.zeros(local_num_v))
+        self.dt_bias = nn.Parameter(torch.zeros(local_num_v))
+        set_weight_attrs(self.A_log, {"weight_loader": sharded_weight_loader(0)})
+        set_weight_attrs(self.dt_bias, {"weight_loader": sharded_weight_loader(0)})
+
+        # Gated RMSNorm on head_v_dim — replicated (head_v_dim=128 is small)
+        self.norm = Qwen3_5RMSNormGated(self.head_v_dim,
+                                        eps=text_cfg.rms_norm_eps)
+
+    def _conv1d_weight_loader(self, param: torch.Tensor,
+                              loaded_weight: torch.Tensor) -> None:
+        # loaded_weight: (conv_dim=10240, 1, kernel) ordered as [q, k, v] channels
+        # Must gather channels in the same non-contiguous pattern that
+        # MergedColumnParallelLinear uses for in_proj_qkv, so that each rank's
+        # conv1d_weight[i] applies to the correct in_proj_qkv output channel.
+        tp_rank = get_tensor_model_parallel_rank()
+        tp_size = get_tensor_model_parallel_world_size()
+        key_local = self.key_dim // tp_size    # 512 with TP=4
+        val_local = self.value_dim // tp_size  # 1536 with TP=4
+        q_s = loaded_weight[tp_rank * key_local : (tp_rank + 1) * key_local]
+        k_s = loaded_weight[self.key_dim + tp_rank * key_local :
+                            self.key_dim + (tp_rank + 1) * key_local]
+        v_s = loaded_weight[2 * self.key_dim + tp_rank * val_local :
+                            2 * self.key_dim + (tp_rank + 1) * val_local]
+        param.data.copy_(torch.cat([q_s, k_s, v_s], dim=0))
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,      # (total_tokens, hidden_size)
+        attn_metadata: AttentionMetadata,
+        conv_state: torch.Tensor,          # (batch, local_conv_dim, kernel-1)  in-place
+        temporal_state: torch.Tensor,      # (batch, local_v_heads, k_dim, v_dim)  in-place
+    ) -> torch.Tensor:
+        tp_size = get_tensor_model_parallel_world_size()
+        local_key_dim = self.key_dim // tp_size
+        local_val_dim = self.value_dim // tp_size
+        local_num_v = self.num_v_heads // tp_size
+        local_num_k = self.num_k_heads // tp_size
+        local_conv_dim = self.conv_dim // tp_size
+
+        is_prefill = attn_metadata.num_prefill_tokens > 0
+
+        # Compute all projections for every token at once (batched, efficient)
+        mixed_qkv_all, _ = self.in_proj_qkv(hidden_states)  # (total, local_conv_dim)
+        z_all, _ = self.in_proj_z(hidden_states)             # (total, local_val_dim)
+        b_all, _ = self.in_proj_b(hidden_states)             # (total, local_num_v)
+        a_all, _ = self.in_proj_a(hidden_states)             # (total, local_num_v)
+
+        if is_prefill:
+            seq_starts = attn_metadata.query_start_loc.tolist()
+            outputs = []
+            state_len = self.conv_kernel_size - 1
+            weight_2d = self.conv1d_weight.squeeze(1)  # (local_conv_dim, kernel)
+
+            for si in range(len(seq_starts) - 1):
+                s, e = int(seq_starts[si]), int(seq_starts[si + 1])
+                seq_len = e - s
+
+                # Shape: (1, local_conv_dim, seq_len)
+                mixed_qkv = (mixed_qkv_all[s:e]
+                             .transpose(0, 1).unsqueeze(0)
+                             .to(weight_2d.dtype))
+
+                # Save conv state (last state_len positions)
+                if seq_len >= state_len:
+                    conv_state[si].copy_(mixed_qkv[0, :, -state_len:])
+                else:
+                    conv_state[si, :, state_len - seq_len:].copy_(
+                        mixed_qkv[0])
+                    conv_state[si, :, :state_len - seq_len] = 0
+
+                # Causal conv (left-pad with zeros, then convolve)
+                padded = F.pad(mixed_qkv, (state_len, 0))
+                mixed_qkv_conv = F.conv1d(
+                    padded, self.conv1d_weight,
+                    bias=None, padding=0, groups=local_conv_dim)
+                mixed_qkv_conv = F.silu(mixed_qkv_conv)
+                # (1, seq_len, local_conv_dim)
+                mixed_qkv_conv = mixed_qkv_conv.squeeze(0).transpose(0, 1).unsqueeze(0)
+
+                q, k, v = torch.split(
+                    mixed_qkv_conv,
+                    [local_key_dim, local_key_dim, local_val_dim], dim=-1)
+                q = q.reshape(1, seq_len, local_num_k, self.head_k_dim)
+                k = k.reshape(1, seq_len, local_num_k, self.head_k_dim)
+                v = v.reshape(1, seq_len, local_num_v, self.head_v_dim)
+
+                beta = b_all[s:e].sigmoid().unsqueeze(0)  # (1, seq_len, local_num_v)
+                g = (-self.A_log.float().exp()
+                     * F.softplus(a_all[s:e].float() + self.dt_bias)
+                     ).unsqueeze(0)  # (1, seq_len, local_num_v)
+
+                # Expand k/q to match num_v_heads
+                q = q.repeat_interleave(self.head_expand_ratio, dim=2)
+                k = k.repeat_interleave(self.head_expand_ratio, dim=2)
+
+                core_out, last_state = _torch_chunk_gated_delta_rule(
+                    q, k, v, g, beta,
+                    initial_state=temporal_state[si:si + 1],
+                    output_final_state=True,
+                    use_qk_l2norm_in_kernel=True,
+                )
+                if last_state is not None:
+                    temporal_state[si].copy_(last_state[0])
+
+                # Gate + norm + output proj
+                z = z_all[s:e].reshape(seq_len, local_num_v, self.head_v_dim)
+                core_out = core_out.reshape(seq_len, local_num_v, self.head_v_dim)
+                normed = self.norm(
+                    core_out.reshape(-1, self.head_v_dim),
+                    z.reshape(-1, self.head_v_dim))
+                normed = normed.reshape(seq_len, -1)
+                out, _ = self.out_proj(normed)
+                outputs.append(out)
+
+            result = torch.cat(outputs, dim=0)
+            assert not torch.isnan(result).any(), f"NaN in prefill layer {self.layer_idx}"
+            return result
+
+        else:
+            # Decode: one token per sequence
+            num_seqs = hidden_states.shape[0]
+            weight_2d = self.conv1d_weight.squeeze(1)
+
+            # (num_seqs, local_conv_dim, 1)
+            mixed_qkv = (mixed_qkv_all
+                         .to(weight_2d.dtype)
+                         .unsqueeze(-1))
+
+            mixed_qkv_conv = _torch_causal_conv1d_update(
+                mixed_qkv, conv_state, weight_2d,
+                bias=None, activation='silu')
+            # (num_seqs, local_conv_dim, 1) → (num_seqs, 1, local_conv_dim)
+            mixed_qkv_conv = mixed_qkv_conv.squeeze(-1).unsqueeze(1)
+
+            q, k, v = torch.split(
+                mixed_qkv_conv,
+                [local_key_dim, local_key_dim, local_val_dim], dim=-1)
+            q = q.reshape(num_seqs, 1, local_num_k, self.head_k_dim)
+            k = k.reshape(num_seqs, 1, local_num_k, self.head_k_dim)
+            v = v.reshape(num_seqs, 1, local_num_v, self.head_v_dim)
+
+            beta = b_all.sigmoid().unsqueeze(1)  # (num_seqs, 1, local_num_v)
+            g = (-self.A_log.float().exp()
+                 * F.softplus(a_all.float() + self.dt_bias)
+                 ).unsqueeze(1)  # (num_seqs, 1, local_num_v)
+
+            q = q.repeat_interleave(self.head_expand_ratio, dim=2)
+            k = k.repeat_interleave(self.head_expand_ratio, dim=2)
+
+            core_out, last_state = _torch_recurrent_gated_delta_rule(
+                q, k, v, g, beta,
+                initial_state=temporal_state,
+                output_final_state=True,
+                use_qk_l2norm_in_kernel=True,
+            )
+            if last_state is not None:
+                temporal_state.copy_(last_state)
+
+            z = z_all.reshape(num_seqs, local_num_v, self.head_v_dim)
+            core_out = core_out.reshape(num_seqs, local_num_v, self.head_v_dim)
+            normed = self.norm(
+                core_out.reshape(-1, self.head_v_dim),
+                z.reshape(-1, self.head_v_dim))
+            normed = normed.reshape(num_seqs, -1)
+            out, _ = self.out_proj(normed)
+            assert not torch.isnan(out).any(), f"NaN in layer {self.layer_idx}"
+            return out
+
+
+# ---------------------------------------------------------------------------
+# Full Attention  (with gated q — unique to Qwen3.5)
+# ---------------------------------------------------------------------------
+
+class Qwen3_5FullAttention(nn.Module):
+    def __init__(
+        self,
+        text_cfg,
+        layer_idx: int,
+        cache_config: Optional[CacheConfig] = None,
+        quant_config: Optional[QuantizationConfig] = None,
+        prefix: str = "",
+    ) -> None:
+        super().__init__()
+        self.layer_idx = layer_idx
+        self.hidden_size = text_cfg.hidden_size               # 5120
+        self.num_heads = text_cfg.num_attention_heads         # 24
+        self.num_kv_heads = text_cfg.num_key_value_heads      # 4
+        self.head_dim = text_cfg.head_dim                     # 256
+        self.rms_norm_eps = text_cfg.rms_norm_eps
+
+        tp_size = get_tensor_model_parallel_world_size()
+        self.local_num_heads = self.num_heads // tp_size
+        self.local_num_kv_heads = max(1, self.num_kv_heads // tp_size)
+        self.local_q_dim = self.local_num_heads * self.head_dim
+        self.local_kv_dim = self.local_num_kv_heads * self.head_dim
+        self.scaling = self.head_dim ** -0.5
+
+        # q_proj includes gate: output = num_heads * head_dim * 2
+        self.q_proj = ColumnParallelLinear(
+            self.hidden_size, self.num_heads * self.head_dim * 2,
+            bias=False, quant_config=quant_config,
+            prefix=f"{prefix}.q_proj")
+        self.k_proj = ColumnParallelLinear(
+            self.hidden_size, self.num_kv_heads * self.head_dim,
+            bias=False, quant_config=quant_config,
+            prefix=f"{prefix}.k_proj")
+        self.v_proj = ColumnParallelLinear(
+            self.hidden_size, self.num_kv_heads * self.head_dim,
+            bias=False, quant_config=quant_config,
+            prefix=f"{prefix}.v_proj")
+        self.o_proj = RowParallelLinear(
+            self.num_heads * self.head_dim, self.hidden_size,
+            bias=False, quant_config=quant_config,
+            prefix=f"{prefix}.o_proj")
+
+        self.q_norm = GemmaRMSNorm(self.head_dim, eps=self.rms_norm_eps)
+        self.k_norm = GemmaRMSNorm(self.head_dim, eps=self.rms_norm_eps)
+
+        # Partial RoPE: rotary_dim = head_dim * partial_rotary_factor = 256 * 0.25 = 64
+        rope_params = getattr(text_cfg, "rope_parameters", {}) or {}
+        rope_theta = rope_params.get("rope_theta", 10_000_000)
+        partial_factor = rope_params.get("partial_rotary_factor", 0.25)
+        rotary_dim = int(self.head_dim * partial_factor)
+
+        self.rotary_emb = get_rope(
+            self.head_dim,
+            rotary_dim=rotary_dim,
+            max_position=text_cfg.max_position_embeddings,
+            base=rope_theta,
+        )
+
+        self.attn = Attention(
+            self.local_num_heads,
+            self.head_dim,
+            self.scaling,
+            num_kv_heads=self.local_num_kv_heads,
+            cache_config=cache_config,
+            quant_config=quant_config,
+            prefix=f"{prefix}.attn",
+        )
+
+    def forward(
+        self,
+        positions: torch.Tensor,
+        hidden_states: torch.Tensor,
+        kv_cache: torch.Tensor,
+        attn_metadata: AttentionMetadata,
+    ) -> torch.Tensor:
+        total_tokens = hidden_states.shape[0]
+
+        # q_proj output includes gate (dim doubled)
+        qg, _ = self.q_proj(hidden_states)  # (total, local_num_heads * head_dim * 2)
+        qg = qg.view(total_tokens, self.local_num_heads, self.head_dim * 2)
+        q = qg[:, :, :self.head_dim].reshape(total_tokens, -1)
+        gate = qg[:, :, self.head_dim:].reshape(total_tokens, -1)
+
+        k, _ = self.k_proj(hidden_states)   # (total, local_kv_dim)
+        v, _ = self.v_proj(hidden_states)
+
+        # Per-head RMSNorm
+        q = self.q_norm.forward_cuda(
+            q.view(total_tokens, self.local_num_heads, self.head_dim)
+            .contiguous()).view(total_tokens, -1)
+        k = self.k_norm.forward_cuda(
+            k.view(total_tokens, self.local_num_kv_heads, self.head_dim)
+            .contiguous()).view(total_tokens, -1)
+
+        q, k = self.rotary_emb(positions, q, k)
+        attn_out = self.attn(q, k, v, kv_cache, attn_metadata)
+
+        # Multiply by sigmoid gate before output projection
+        attn_out = attn_out * torch.sigmoid(gate.float()).to(attn_out.dtype)
+        output, _ = self.o_proj(attn_out)
+        return output
+
+
+# ---------------------------------------------------------------------------
+# MLP  (SwiGLU, same as Qwen2/Qwen3)
+# ---------------------------------------------------------------------------
+
+class Qwen3_5MLP(nn.Module):
+    def __init__(
+        self,
+        hidden_size: int,
+        intermediate_size: int,
+        hidden_act: str,
+        quant_config: Optional[QuantizationConfig] = None,
+    ) -> None:
+        super().__init__()
+        self.gate_up_proj = MergedColumnParallelLinear(
+            hidden_size, [intermediate_size] * 2,
+            bias=False, quant_config=quant_config)
+        self.down_proj = RowParallelLinear(
+            intermediate_size, hidden_size,
+            bias=False, quant_config=quant_config)
+        if hidden_act != "silu":
+            raise ValueError(f"Unsupported activation: {hidden_act}")
+        self.act_fn = SiluAndMul()
+
+    def forward(self, x: torch.Tensor) -> torch.Tensor:
+        gate_up, _ = self.gate_up_proj(x)
+        x = self.act_fn(gate_up)
+        x, _ = self.down_proj(x)
+        return x
+
+
+# ---------------------------------------------------------------------------
+# Decoder layer  (dispatches to GatedDeltaNet or Qwen3_5FullAttention)
+# ---------------------------------------------------------------------------
+
+class Qwen3_5DecoderLayer(nn.Module):
+    def __init__(
+        self,
+        text_cfg,
+        layer_idx: int,
+        layer_type: str,
+        cache_config: Optional[CacheConfig] = None,
+        quant_config: Optional[QuantizationConfig] = None,
+    ) -> None:
+        super().__init__()
+        self.layer_type = layer_type
+        self.input_layernorm = GemmaRMSNorm(text_cfg.hidden_size,
+                                           eps=text_cfg.rms_norm_eps)
+        self.post_attention_layernorm = GemmaRMSNorm(text_cfg.hidden_size,
+                                                     eps=text_cfg.rms_norm_eps)
+
+        if layer_type == "linear_attention":
+            self.linear_attn = GatedDeltaNet(text_cfg, layer_idx,
+                                             quant_config=quant_config)
+        else:
+            self.self_attn = Qwen3_5FullAttention(
+                text_cfg, layer_idx,
+                cache_config=cache_config,
+                quant_config=quant_config,
+                prefix=f"layers.{layer_idx}.self_attn",
+            )
+
+        self.mlp = Qwen3_5MLP(
+            hidden_size=text_cfg.hidden_size,
+            intermediate_size=text_cfg.intermediate_size,
+            hidden_act=text_cfg.hidden_act,
+            quant_config=quant_config,
+        )
+
+    def forward(
+        self,
+        positions: torch.Tensor,
+        hidden_states: torch.Tensor,
+        kv_cache: Optional[torch.Tensor],
+        attn_metadata: AttentionMetadata,
+        residual: Optional[torch.Tensor],
+        # Only for linear_attention layers:
+        conv_state: Optional[torch.Tensor] = None,
+        temporal_state: Optional[torch.Tensor] = None,
+    ) -> Tuple[torch.Tensor, torch.Tensor]:
+        if residual is None:
+            residual = hidden_states
+            hidden_states = self.input_layernorm(hidden_states)
+        else:
+            hidden_states, residual = self.input_layernorm(hidden_states, residual)
+
+        if self.layer_type == "linear_attention":
+            hidden_states = self.linear_attn(
+                hidden_states, attn_metadata, conv_state, temporal_state)
+        else:
+            hidden_states = self.self_attn(
+                positions, hidden_states, kv_cache, attn_metadata)
+
+        hidden_states, residual = self.post_attention_layernorm(
+            hidden_states, residual)
+        hidden_states = self.mlp(hidden_states)
+        return hidden_states, residual
+
+
+# ---------------------------------------------------------------------------
+# Full transformer model
+# ---------------------------------------------------------------------------
+
+class Qwen3_5Model(nn.Module):
+    def __init__(
+        self,
+        text_cfg,
+        cache_config: Optional[CacheConfig] = None,
+        quant_config: Optional[QuantizationConfig] = None,
+    ) -> None:
+        super().__init__()
+        self.text_cfg = text_cfg
+        self.embed_tokens = VocabParallelEmbedding(
+            text_cfg.vocab_size, text_cfg.hidden_size)
+        self.layers = nn.ModuleList([
+            Qwen3_5DecoderLayer(
+                text_cfg, i, text_cfg.layer_types[i],
+                cache_config=cache_config, quant_config=quant_config)
+            for i in range(text_cfg.num_hidden_layers)
+        ])
+        self.norm = GemmaRMSNorm(text_cfg.hidden_size, eps=text_cfg.rms_norm_eps)
+
+    def forward(
+        self,
+        input_ids: torch.Tensor,
+        positions: torch.Tensor,
+        kv_caches: List[torch.Tensor],
+        attn_metadata: AttentionMetadata,
+        conv_states: torch.Tensor,     # (num_linear_layers, batch, ...)
+        temporal_states: torch.Tensor, # (num_linear_layers, batch, ...)
+    ) -> torch.Tensor:
+        hidden_states = self.embed_tokens(input_ids)
+        residual = None
+
+        attn_idx = 0
+        linear_idx = 0
+        for layer in self.layers:
+            if layer.layer_type == "linear_attention":
+                hidden_states, residual = layer(
+                    positions, hidden_states,
+                    kv_cache=None,
+                    attn_metadata=attn_metadata,
+                    residual=residual,
+                    conv_state=conv_states[linear_idx],
+                    temporal_state=temporal_states[linear_idx],
+                )
+                linear_idx += 1
+            else:
+                kv_cache = kv_caches[attn_idx]
+                hidden_states, residual = layer(
+                    positions, hidden_states,
+                    kv_cache=kv_cache,
+                    attn_metadata=attn_metadata,
+                    residual=residual,
+                )
+                attn_idx += 1
+
+        hidden_states, _ = self.norm(hidden_states, residual)
+        return hidden_states
+
+
+# ---------------------------------------------------------------------------
+# Top-level CausalLM wrapper with MambaCacheManager
+# ---------------------------------------------------------------------------
+
+class Qwen3_5ForCausalLM(nn.Module, HasInnerState, SupportsLoRA):
+
+    has_inner_state = True
+    supports_lora = True
+
+    packed_modules_mapping = {
+        "gate_up_proj": ["gate_proj", "up_proj"],
+    }
+
+    supported_lora_modules = [
+        "gate_up_proj",
+        "down_proj",
+        "o_proj",
+    ]
+    embedding_modules = {}
+    embedding_padding_modules = []
+
+    def __init__(
+        self,
+        config,                                           # Qwen3_5Config (top-level)
+        cache_config: Optional[CacheConfig] = None,
+        quant_config: Optional[QuantizationConfig] = None,
+        lora_config: Optional[LoRAConfig] = None,
+        scheduler_config: Optional[SchedulerConfig] = None,
+        prefix: str = "",
+    ) -> None:
+        super().__init__()
+        self.config = config
+        self.scheduler_config = scheduler_config
+
+        # The text config holds all architecture parameters
+        text_cfg = config.text_config
+        self.text_cfg = text_cfg
+
+        # Pre-compute counts
+        self.num_linear_layers = sum(
+            1 for lt in text_cfg.layer_types if lt == "linear_attention")
+        self.num_attn_layers = sum(
+            1 for lt in text_cfg.layer_types if lt == "full_attention")
+
+        # DeltaNet state dimensions (per layer, per sequence, TP-sharded)
+        tp_size = get_tensor_model_parallel_world_size()
+        self.conv_dim = (text_cfg.linear_num_key_heads * text_cfg.linear_key_head_dim * 2
+                         + text_cfg.linear_num_value_heads * text_cfg.linear_value_head_dim)
+        self.num_v_heads = text_cfg.linear_num_value_heads
+        self.head_k_dim = text_cfg.linear_key_head_dim
+        self.head_v_dim = text_cfg.linear_value_head_dim
+        self.conv_kernel_size = text_cfg.linear_conv_kernel_dim
+
+        self.model = Qwen3_5Model(
+            text_cfg,
+            cache_config=cache_config,
+            quant_config=quant_config,
+        )
+
+        self.lm_head = ParallelLMHead(
+            text_cfg.vocab_size, text_cfg.hidden_size,
+            quant_config=quant_config,
+        )
+
+        self.logits_processor = LogitsProcessor(text_cfg.vocab_size)
+        self.sampler = Sampler()
+
+        # Lazy initialised in first forward call
+        self.mamba_cache: Optional[MambaCacheManager] = None
+
+    def _get_mamba_cache_shape(self):
+        tp_size = get_tensor_model_parallel_world_size()
+        # Each sequence's state is stored in float32
+        conv_state_shape = (self.conv_dim // tp_size, self.conv_kernel_size - 1)
+        temporal_state_shape = (
+            self.num_v_heads // tp_size, self.head_k_dim, self.head_v_dim)
+        return conv_state_shape, temporal_state_shape
+
+    def forward(
+        self,
+        input_ids: torch.Tensor,
+        positions: torch.Tensor,
+        kv_caches: List[torch.Tensor],
+        attn_metadata: AttentionMetadata,
+        intermediate_tensors: Optional[IntermediateTensors] = None,
+        **kwargs,
+    ) -> torch.Tensor:
+        if self.mamba_cache is None:
+            if self.scheduler_config is not None:
+                max_batch_size = _get_graph_batch_size(
+                    self.scheduler_config.max_num_seqs)
+            else:
+                max_batch_size = max(_BATCH_SIZES_TO_CAPTURE) + 2
+            self.mamba_cache = MambaCacheManager(
+                torch.float32,
+                self.num_linear_layers,
+                max_batch_size,
+                *self._get_mamba_cache_shape(),
+            )
+
+        mamba_tensors = self.mamba_cache.current_run_tensors(
+            input_ids, attn_metadata, **kwargs)
+        # conv_states:     (num_linear_layers, batch, local_conv_dim, kernel-1)
+        # temporal_states: (num_linear_layers, batch, local_num_v, k_dim, v_dim)
+        conv_states, temporal_states = mamba_tensors
+
+        hidden_states = self.model(
+            input_ids, positions, kv_caches, attn_metadata,
+            conv_states, temporal_states)
+        return hidden_states
+
+    def compute_logits(
+        self,
+        hidden_states: torch.Tensor,
+        sampling_metadata: SamplingMetadata,
+    ) -> Optional[torch.Tensor]:
+        return self.logits_processor(self.lm_head, hidden_states,
+                                     sampling_metadata)
+
+    def sample(
+        self,
+        logits: torch.Tensor,
+        sampling_metadata: SamplingMetadata,
+    ) -> Optional[SamplerOutput]:
+        return self.sampler(logits, sampling_metadata)
+
+    def copy_inputs_before_cuda_graphs(self, input_buffers, **kwargs):
+        return self.mamba_cache.copy_inputs_before_cuda_graphs(
+            input_buffers, **kwargs)
+
+    def get_seqlen_agnostic_capture_inputs(self, batch_size: int):
+        return self.mamba_cache.get_seqlen_agnostic_capture_inputs(batch_size)
+
+    def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
+        stacked_params_mapping = [
+            # (param_name, weight_name, shard_id)
+            ("gate_up_proj", "gate_proj", 0),
+            ("gate_up_proj", "up_proj", 1),
+        ]
+        params_dict = dict(self.named_parameters())
+
+        for name, loaded_weight in weights:
+            # Skip vision and MTP branches
+            if (name.startswith("model.visual")
+                    or name.startswith("mtp.")
+                    or name.startswith("model.mtp")):
+                continue
+
+            # Remap checkpoint prefix → module path
+            # Checkpoint: "model.language_model.{rest}" → our module: "model.{rest}"
+            # Checkpoint: "lm_head.weight"              → our module: "lm_head.weight"
+            if name.startswith("model.language_model."):
+                name = "model." + name[len("model.language_model."):]
+            # lm_head is already at top level — no change needed
+
+            # Skip positional embedding caches
+            if "rotary_emb.inv_freq" in name:
+                continue
+
+            # Remap conv1d.weight → conv1d_weight
+            # The conv has depth (1) dim in the checkpoint that we handle separately
+            if ".linear_attn.conv1d.weight" in name:
+                name = name.replace(".linear_attn.conv1d.weight",
+                                    ".linear_attn.conv1d_weight")
+
+            # Stacked param loading (gate_up_proj)
+            for param_name, weight_name, shard_id in stacked_params_mapping:
+                if weight_name not in name:
+                    continue
+                name = name.replace(weight_name, param_name)
+                if name.endswith(".bias") and name not in params_dict:
+                    break
+                if name not in params_dict:
+                    break
+                param = params_dict[name]
+                weight_loader = param.weight_loader
+                weight_loader(param, loaded_weight, shard_id)
+                break
+            else:
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                if name not in params_dict:
+                    continue
+                param = params_dict[name]
+                weight_loader = getattr(param, "weight_loader",
+                                        default_weight_loader)
+                weight_loader(param, loaded_weight)

qwen3_6_scripts/qwen3_5/__init__.py

@@ -0,0 +1,3 @@
+from .configuration_qwen3_5 import Qwen3_5Config, Qwen3_5TextConfig, Qwen3_5VisionConfig
+
+__all__ = ["Qwen3_5Config", "Qwen3_5TextConfig", "Qwen3_5VisionConfig"]

qwen3_6_scripts/qwen3_5/configuration_qwen3_5.py

@@ -0,0 +1,188 @@
+# Adapted from transformers 5.2.0 for compatibility with transformers 4.55.3 + torch 2.1.0
+# Stubs layer_type_validation and RopeParameters which do not exist in 4.55.3
+
+from typing import Optional, List
+
+from ...configuration_utils import PretrainedConfig as PreTrainedConfig
+
+# --- Local stubs for APIs not present in transformers 4.55.3 ---
+# Always use these definitions; do NOT import from the older transformers
+# as same-named functions there have incompatible signatures.
+
+def layer_type_validation(layer_types, num_hidden_layers=None, attention=True):
+    allowed = {"full_attention", "linear_attention"}
+    if not all(lt in allowed for lt in layer_types):
+        raise ValueError(f"layer_types entries must be in {allowed}, got {layer_types}")
+    if num_hidden_layers is not None and num_hidden_layers != len(layer_types):
+        raise ValueError(
+            f"num_hidden_layers ({num_hidden_layers}) != len(layer_types) ({len(layer_types)})"
+        )
+
+try:
+    from typing import TypedDict
+    class RopeParameters(TypedDict, total=False):
+        rope_theta: float
+        rope_type: str
+        partial_rotary_factor: float
+        factor: float
+except Exception:
+    RopeParameters = dict
+
+# --- End stubs ---
+
+
+class Qwen3_5TextConfig(PreTrainedConfig):
+    r"""
+    Configuration for the text backbone of Qwen3.5 / Qwen3.6-27B models.
+    model_type is "qwen3_5_text" (used internally by the nested config).
+    """
+
+    model_type = "qwen3_5_text"
+    keys_to_ignore_at_inference = ["past_key_values"]
+
+    def __init__(
+        self,
+        vocab_size=248320,
+        hidden_size=4096,
+        intermediate_size=12288,
+        num_hidden_layers=32,
+        num_attention_heads=16,
+        num_key_value_heads=4,
+        hidden_act="silu",
+        max_position_embeddings=32768,
+        initializer_range=0.02,
+        rms_norm_eps=1e-6,
+        use_cache=True,
+        tie_word_embeddings=False,
+        rope_parameters=None,
+        attention_bias=False,
+        attention_dropout=0.0,
+        head_dim=256,
+        linear_conv_kernel_dim=4,
+        linear_key_head_dim=128,
+        linear_value_head_dim=128,
+        linear_num_key_heads=16,
+        linear_num_value_heads=32,
+        layer_types=None,
+        pad_token_id=None,
+        bos_token_id=None,
+        eos_token_id=None,
+        **kwargs,
+    ):
+        self.pad_token_id = pad_token_id
+        self.bos_token_id = bos_token_id
+        self.eos_token_id = eos_token_id
+        self.tie_word_embeddings = tie_word_embeddings
+        self.vocab_size = vocab_size
+        self.max_position_embeddings = max_position_embeddings
+        self.hidden_size = hidden_size
+        self.intermediate_size = intermediate_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.num_key_value_heads = num_key_value_heads
+        self.hidden_act = hidden_act
+        self.initializer_range = initializer_range
+        self.rms_norm_eps = rms_norm_eps
+        self.use_cache = use_cache
+        self.attention_bias = attention_bias
+        self.attention_dropout = attention_dropout
+        self.head_dim = head_dim
+        self.rope_parameters = rope_parameters
+        kwargs.setdefault("partial_rotary_factor", 0.25)
+
+        self.layer_types = layer_types
+        if self.layer_types is None:
+            interval_pattern = kwargs.get("full_attention_interval", 4)
+            self.layer_types = [
+                "linear_attention" if bool((i + 1) % interval_pattern) else "full_attention"
+                for i in range(self.num_hidden_layers)
+            ]
+        layer_type_validation(self.layer_types, self.num_hidden_layers)
+
+        self.linear_conv_kernel_dim = linear_conv_kernel_dim
+        self.linear_key_head_dim = linear_key_head_dim
+        self.linear_value_head_dim = linear_value_head_dim
+        self.linear_num_key_heads = linear_num_key_heads
+        self.linear_num_value_heads = linear_num_value_heads
+        super().__init__(**kwargs)
+
+
+class Qwen3_5VisionConfig(PreTrainedConfig):
+    model_type = "qwen3_5_vision"
+
+    def __init__(
+        self,
+        depth=27,
+        hidden_size=1152,
+        hidden_act="gelu_pytorch_tanh",
+        intermediate_size=4304,
+        num_heads=16,
+        in_channels=3,
+        patch_size=16,
+        spatial_merge_size=2,
+        temporal_patch_size=2,
+        out_hidden_size=3584,
+        num_position_embeddings=2304,
+        initializer_range=0.02,
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+        self.depth = depth
+        self.hidden_size = hidden_size
+        self.hidden_act = hidden_act
+        self.intermediate_size = intermediate_size
+        self.num_heads = num_heads
+        self.in_channels = in_channels
+        self.patch_size = patch_size
+        self.spatial_merge_size = spatial_merge_size
+        self.temporal_patch_size = temporal_patch_size
+        self.out_hidden_size = out_hidden_size
+        self.num_position_embeddings = num_position_embeddings
+        self.initializer_range = initializer_range
+
+
+class Qwen3_5Config(PreTrainedConfig):
+    r"""
+    Top-level configuration for Qwen3.5 / Qwen3.6-27B.
+    model_type = "qwen3_5" matches the model card / config.json.
+    Wraps Qwen3_5TextConfig (and optionally Qwen3_5VisionConfig for multimodal use).
+    For vLLM text-only inference only text_config is consumed.
+    """
+
+    model_type = "qwen3_5"
+    keys_to_ignore_at_inference = ["past_key_values"]
+
+    def __init__(
+        self,
+        text_config=None,
+        vision_config=None,
+        image_token_id=248056,
+        video_token_id=248057,
+        vision_start_token_id=248053,
+        vision_end_token_id=248054,
+        tie_word_embeddings=False,
+        **kwargs,
+    ):
+        if isinstance(text_config, dict):
+            self.text_config = Qwen3_5TextConfig(**text_config)
+        elif text_config is None:
+            self.text_config = Qwen3_5TextConfig()
+        else:
+            self.text_config = text_config
+
+        if isinstance(vision_config, dict):
+            self.vision_config = Qwen3_5VisionConfig(**vision_config)
+        elif vision_config is None:
+            self.vision_config = Qwen3_5VisionConfig()
+        else:
+            self.vision_config = vision_config
+
+        self.image_token_id = image_token_id
+        self.video_token_id = video_token_id
+        self.vision_start_token_id = vision_start_token_id
+        self.vision_end_token_id = vision_end_token_id
+        self.tie_word_embeddings = tie_word_embeddings
+        super().__init__(**kwargs)
+
+
+__all__ = ["Qwen3_5Config", "Qwen3_5TextConfig", "Qwen3_5VisionConfig"]